---
_id: '7002'
abstract:
- lang: eng
text: Multiple Importance Sampling (MIS) is a key technique for achieving robustness
of Monte Carlo estimators in computer graphics and other fields. We derive optimal
weighting functions for MIS that provably minimize the variance of an MIS estimator,
given a set of sampling techniques. We show that the resulting variance reduction
over the balance heuristic can be higher than predicted by the variance bounds
derived by Veach and Guibas, who assumed only non-negative weights in their proof.
We theoretically analyze the variance of the optimal MIS weights and show the
relation to the variance of the balance heuristic. Furthermore, we establish a
connection between the new weighting functions and control variates as previously
applied to mixture sampling. We apply the new optimal weights to integration problems
in light transport and show that they allow for new design considerations when
choosing the appropriate sampling techniques for a given integration problem.
article_number: '37'
article_processing_charge: No
article_type: original
author:
- first_name: Ivo
full_name: Kondapaneni, Ivo
last_name: Kondapaneni
- first_name: Petr
full_name: Vevoda, Petr
last_name: Vevoda
- first_name: Pascal
full_name: Grittmann, Pascal
last_name: Grittmann
- first_name: Tomas
full_name: Skrivan, Tomas
id: 486A5A46-F248-11E8-B48F-1D18A9856A87
last_name: Skrivan
- first_name: Philipp
full_name: Slusallek, Philipp
last_name: Slusallek
- first_name: Jaroslav
full_name: Křivánek, Jaroslav
last_name: Křivánek
citation:
ama: Kondapaneni I, Vevoda P, Grittmann P, Skrivan T, Slusallek P, Křivánek J. Optimal
multiple importance sampling. ACM Transactions on Graphics. 2019;38(4).
doi:10.1145/3306346.3323009
apa: Kondapaneni, I., Vevoda, P., Grittmann, P., Skrivan, T., Slusallek, P., &
Křivánek, J. (2019). Optimal multiple importance sampling. ACM Transactions
on Graphics. ACM. https://doi.org/10.1145/3306346.3323009
chicago: Kondapaneni, Ivo, Petr Vevoda, Pascal Grittmann, Tomas Skrivan, Philipp
Slusallek, and Jaroslav Křivánek. “Optimal Multiple Importance Sampling.” ACM
Transactions on Graphics. ACM, 2019. https://doi.org/10.1145/3306346.3323009.
ieee: I. Kondapaneni, P. Vevoda, P. Grittmann, T. Skrivan, P. Slusallek, and J.
Křivánek, “Optimal multiple importance sampling,” ACM Transactions on Graphics,
vol. 38, no. 4. ACM, 2019.
ista: Kondapaneni I, Vevoda P, Grittmann P, Skrivan T, Slusallek P, Křivánek J.
2019. Optimal multiple importance sampling. ACM Transactions on Graphics. 38(4),
37.
mla: Kondapaneni, Ivo, et al. “Optimal Multiple Importance Sampling.” ACM Transactions
on Graphics, vol. 38, no. 4, 37, ACM, 2019, doi:10.1145/3306346.3323009.
short: I. Kondapaneni, P. Vevoda, P. Grittmann, T. Skrivan, P. Slusallek, J. Křivánek,
ACM Transactions on Graphics 38 (2019).
date_created: 2019-11-12T13:05:40Z
date_published: 2019-07-01T00:00:00Z
date_updated: 2025-03-31T15:58:17Z
day: '01'
department:
- _id: ChWo
doi: 10.1145/3306346.3323009
ec_funded: 1
external_id:
isi:
- '000475740600011'
intvolume: ' 38'
isi: 1
issue: '4'
language:
- iso: eng
month: '07'
oa_version: None
project:
- _id: 2508E324-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '642841'
name: Distributed 3D Object Design
publication: ACM Transactions on Graphics
publication_identifier:
issn:
- 0730-0301
publication_status: published
publisher: ACM
quality_controlled: '1'
scopus_import: '1'
status: public
title: Optimal multiple importance sampling
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 38
year: '2019'
...
---
_id: '7418'
abstract:
- lang: eng
text: Multiple importance sampling (MIS) has become an indispensable tool in Monte
Carlo rendering, widely accepted as a near-optimal solution for combining different
sampling techniques. But an MIS combination, using the common balance or power
heuristics, often results in an overly defensive estimator, leading to high variance.
We show that by generalizing the MIS framework, variance can be substantially
reduced. Specifically, we optimize one of the combined sampling techniques so
as to decrease the overall variance of the resulting MIS estimator. We apply the
approach to the computation of direct illumination due to an HDR environment map
and to the computation of global illumination using a path guiding algorithm.
The implementation can be as simple as subtracting a constant value from the tabulated
sampling density done entirely in a preprocessing step. This produces a consistent
noise reduction in all our tests with no negative influence on run time, no artifacts
or bias, and no failure cases.
article_number: '151'
article_processing_charge: No
article_type: original
author:
- first_name: Ondřej
full_name: Karlík, Ondřej
last_name: Karlík
- first_name: Martin
full_name: Šik, Martin
last_name: Šik
- first_name: Petr
full_name: Vévoda, Petr
last_name: Vévoda
- first_name: Tomas
full_name: Skrivan, Tomas
id: 486A5A46-F248-11E8-B48F-1D18A9856A87
last_name: Skrivan
- first_name: Jaroslav
full_name: Křivánek, Jaroslav
last_name: Křivánek
citation:
ama: 'Karlík O, Šik M, Vévoda P, Skrivan T, Křivánek J. MIS compensation: Optimizing
sampling techniques in multiple importance sampling. ACM Transactions on Graphics.
2019;38(6). doi:10.1145/3355089.3356565'
apa: 'Karlík, O., Šik, M., Vévoda, P., Skrivan, T., & Křivánek, J. (2019). MIS
compensation: Optimizing sampling techniques in multiple importance sampling.
ACM Transactions on Graphics. ACM. https://doi.org/10.1145/3355089.3356565'
chicago: 'Karlík, Ondřej, Martin Šik, Petr Vévoda, Tomas Skrivan, and Jaroslav Křivánek.
“MIS Compensation: Optimizing Sampling Techniques in Multiple Importance Sampling.”
ACM Transactions on Graphics. ACM, 2019. https://doi.org/10.1145/3355089.3356565.'
ieee: 'O. Karlík, M. Šik, P. Vévoda, T. Skrivan, and J. Křivánek, “MIS compensation:
Optimizing sampling techniques in multiple importance sampling,” ACM Transactions
on Graphics, vol. 38, no. 6. ACM, 2019.'
ista: 'Karlík O, Šik M, Vévoda P, Skrivan T, Křivánek J. 2019. MIS compensation:
Optimizing sampling techniques in multiple importance sampling. ACM Transactions
on Graphics. 38(6), 151.'
mla: 'Karlík, Ondřej, et al. “MIS Compensation: Optimizing Sampling Techniques in
Multiple Importance Sampling.” ACM Transactions on Graphics, vol. 38, no.
6, 151, ACM, 2019, doi:10.1145/3355089.3356565.'
short: O. Karlík, M. Šik, P. Vévoda, T. Skrivan, J. Křivánek, ACM Transactions on
Graphics 38 (2019).
date_created: 2020-01-30T10:19:43Z
date_published: 2019-11-01T00:00:00Z
date_updated: 2023-09-06T15:22:23Z
day: '01'
department:
- _id: ChWo
doi: 10.1145/3355089.3356565
external_id:
isi:
- '000498397300001'
intvolume: ' 38'
isi: 1
issue: '6'
language:
- iso: eng
month: '11'
oa_version: None
publication: ACM Transactions on Graphics
publication_identifier:
eissn:
- 1557-7368
issn:
- 0730-0301
publication_status: published
publisher: ACM
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'MIS compensation: Optimizing sampling techniques in multiple importance sampling'
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 38
year: '2019'
...
---
_id: '134'
abstract:
- lang: eng
text: "The current state of the art in real-time two-dimensional water wave simulation
requires developers to choose between efficient Fourier-based methods, which lack
interactions with moving obstacles, and finite-difference or finite element methods,
which handle environmental interactions but are significantly more expensive.
This paper attempts to bridge this long-standing gap between complexity and performance,
by proposing a new wave simulation method that can faithfully simulate wave interactions
with moving obstacles in real time while simultaneously preserving minute details
and accommodating very large simulation domains.\r\n\r\nPrevious methods for simulating
2D water waves directly compute the change in height of the water surface, a strategy
which imposes limitations based on the CFL condition (fast moving waves require
small time steps) and Nyquist's limit (small wave details require closely-spaced
simulation variables). This paper proposes a novel wavelet transformation that
discretizes the liquid motion in terms of amplitude-like functions that vary over
space, frequency, and direction, effectively generalizing Fourier-based methods
to handle local interactions. Because these new variables change much more slowly
over space than the original water height function, our change of variables drastically
reduces the limitations of the CFL condition and Nyquist limit, allowing us to
simulate highly detailed water waves at very large visual resolutions. Our discretization
is amenable to fast summation and easy to parallelize. We also present basic extensions
like pre-computed wave paths and two-way solid fluid coupling. Finally, we argue
that our discretization provides a convenient set of variables for artistic manipulation,
which we illustrate with a novel wave-painting interface."
acknowledged_ssus:
- _id: ScienComp
alternative_title:
- SIGGRAPH
article_number: '94'
article_processing_charge: No
author:
- first_name: Stefan
full_name: Jeschke, Stefan
id: 44D6411A-F248-11E8-B48F-1D18A9856A87
last_name: Jeschke
- first_name: Tomas
full_name: Skrivan, Tomas
id: 486A5A46-F248-11E8-B48F-1D18A9856A87
last_name: Skrivan
- first_name: Matthias
full_name: Mueller Fischer, Matthias
last_name: Mueller Fischer
- first_name: Nuttapong
full_name: Chentanez, Nuttapong
last_name: Chentanez
- first_name: Miles
full_name: Macklin, Miles
last_name: Macklin
- first_name: Christopher J
full_name: Wojtan, Christopher J
id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87
last_name: Wojtan
orcid: 0000-0001-6646-5546
citation:
ama: Jeschke S, Skrivan T, Mueller Fischer M, Chentanez N, Macklin M, Wojtan C.
Water surface wavelets. ACM Transactions on Graphics. 2018;37(4). doi:10.1145/3197517.3201336
apa: Jeschke, S., Skrivan, T., Mueller Fischer, M., Chentanez, N., Macklin, M.,
& Wojtan, C. (2018). Water surface wavelets. ACM Transactions on Graphics.
ACM. https://doi.org/10.1145/3197517.3201336
chicago: Jeschke, Stefan, Tomas Skrivan, Matthias Mueller Fischer, Nuttapong Chentanez,
Miles Macklin, and Chris Wojtan. “Water Surface Wavelets.” ACM Transactions
on Graphics. ACM, 2018. https://doi.org/10.1145/3197517.3201336.
ieee: S. Jeschke, T. Skrivan, M. Mueller Fischer, N. Chentanez, M. Macklin, and
C. Wojtan, “Water surface wavelets,” ACM Transactions on Graphics, vol.
37, no. 4. ACM, 2018.
ista: Jeschke S, Skrivan T, Mueller Fischer M, Chentanez N, Macklin M, Wojtan C.
2018. Water surface wavelets. ACM Transactions on Graphics. 37(4), 94.
mla: Jeschke, Stefan, et al. “Water Surface Wavelets.” ACM Transactions on Graphics,
vol. 37, no. 4, 94, ACM, 2018, doi:10.1145/3197517.3201336.
short: S. Jeschke, T. Skrivan, M. Mueller Fischer, N. Chentanez, M. Macklin, C.
Wojtan, ACM Transactions on Graphics 37 (2018).
date_created: 2018-12-11T11:44:48Z
date_published: 2018-07-30T00:00:00Z
date_updated: 2024-10-22T09:58:20Z
day: '30'
ddc:
- '000'
department:
- _id: ChWo
doi: 10.1145/3197517.3201336
ec_funded: 1
external_id:
isi:
- '000448185000055'
file:
- access_level: open_access
checksum: db75ebabe2ec432bf41389e614d6ef62
content_type: application/pdf
creator: dernst
date_created: 2018-12-18T09:59:23Z
date_updated: 2020-07-14T12:44:45Z
file_id: '5744'
file_name: 2018_ACM_Jeschke.pdf
file_size: 22185016
relation: main_file
file_date_updated: 2020-07-14T12:44:45Z
has_accepted_license: '1'
intvolume: ' 37'
isi: 1
issue: '4'
language:
- iso: eng
license: https://creativecommons.org/licenses/by-nc-sa/4.0/
month: '07'
oa: 1
oa_version: Published Version
project:
- _id: 2533E772-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '638176'
name: 'Big Splash: Efficient Simulation of Natural Phenomena at Extremely Large
Scales'
- _id: 2564DBCA-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '665385'
name: International IST Doctoral Program
publication: ACM Transactions on Graphics
publication_status: published
publisher: ACM
publist_id: '7789'
quality_controlled: '1'
related_material:
link:
- description: News on IST Homepage
relation: press_release
url: https://ist.ac.at/en/news/new-water-simulation-captures-small-details-even-in-large-scenes/
scopus_import: '1'
status: public
title: Water surface wavelets
tmp:
image: /images/cc_by_nc_sa.png
legal_code_url: https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode
name: Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC
BY-NC-SA 4.0)
short: CC BY-NC-SA (4.0)
type: journal_article
user_id: 2EBD1598-F248-11E8-B48F-1D18A9856A87
volume: 37
year: '2018'
...
---
_id: '135'
abstract:
- lang: eng
text: The Fluid Implicit Particle method (FLIP) reduces numerical dissipation by
combining particles with grids. To improve performance, the subsequent narrow
band FLIP method (NB‐FLIP) uses a FLIP‐based fluid simulation only near the liquid
surface and a traditional grid‐based fluid simulation away from the surface. This
spatially‐limited FLIP simulation significantly reduces the number of particles
and alleviates a computational bottleneck. In this paper, we extend the NB‐FLIP
idea even further, by allowing a simulation to transition between a FLIP‐like
fluid simulation and a grid‐based simulation in arbitrary locations, not just
near the surface. This approach leads to even more savings in memory and computation,
because we can concentrate the particles only in areas where they are needed.
More importantly, this new method allows us to seamlessly transition to smooth
implicit surface geometry wherever the particle‐based simulation is unnecessary.
Consequently, our method leads to a practical algorithm for avoiding the noisy
surface artifacts associated with particle‐based liquid simulations, while simultaneously
maintaining the benefits of a FLIP simulation in regions of dynamic motion.
alternative_title:
- Eurographics
article_processing_charge: No
article_type: original
author:
- first_name: Takahiro
full_name: Sato, Takahiro
last_name: Sato
- first_name: Christopher J
full_name: Wojtan, Christopher J
id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87
last_name: Wojtan
orcid: 0000-0001-6646-5546
- first_name: Nils
full_name: Thuerey, Nils
last_name: Thuerey
- first_name: Takeo
full_name: Igarashi, Takeo
last_name: Igarashi
- first_name: Ryoichi
full_name: Ando, Ryoichi
last_name: Ando
citation:
ama: Sato T, Wojtan C, Thuerey N, Igarashi T, Ando R. Extended narrow band FLIP
for liquid simulations. Computer Graphics Forum. 2018;37(2):169-177. doi:10.1111/cgf.13351
apa: Sato, T., Wojtan, C., Thuerey, N., Igarashi, T., & Ando, R. (2018). Extended
narrow band FLIP for liquid simulations. Computer Graphics Forum. Wiley.
https://doi.org/10.1111/cgf.13351
chicago: Sato, Takahiro, Chris Wojtan, Nils Thuerey, Takeo Igarashi, and Ryoichi
Ando. “Extended Narrow Band FLIP for Liquid Simulations.” Computer Graphics
Forum. Wiley, 2018. https://doi.org/10.1111/cgf.13351.
ieee: T. Sato, C. Wojtan, N. Thuerey, T. Igarashi, and R. Ando, “Extended narrow
band FLIP for liquid simulations,” Computer Graphics Forum, vol. 37, no.
2. Wiley, pp. 169–177, 2018.
ista: Sato T, Wojtan C, Thuerey N, Igarashi T, Ando R. 2018. Extended narrow band
FLIP for liquid simulations. Computer Graphics Forum. 37(2), 169–177.
mla: Sato, Takahiro, et al. “Extended Narrow Band FLIP for Liquid Simulations.”
Computer Graphics Forum, vol. 37, no. 2, Wiley, 2018, pp. 169–77, doi:10.1111/cgf.13351.
short: T. Sato, C. Wojtan, N. Thuerey, T. Igarashi, R. Ando, Computer Graphics Forum
37 (2018) 169–177.
date_created: 2018-12-11T11:44:49Z
date_published: 2018-05-22T00:00:00Z
date_updated: 2024-10-22T09:58:20Z
day: '22'
ddc:
- '006'
department:
- _id: ChWo
doi: 10.1111/cgf.13351
ec_funded: 1
external_id:
isi:
- '000434085600016'
file:
- access_level: open_access
checksum: 8edb90da8a72395eb5d970580e0925b6
content_type: application/pdf
creator: wojtan
date_created: 2020-10-08T08:38:23Z
date_updated: 2020-10-08T08:38:23Z
file_id: '8627'
file_name: exnbflip.pdf
file_size: 54309947
relation: main_file
success: 1
file_date_updated: 2020-10-08T08:38:23Z
has_accepted_license: '1'
intvolume: ' 37'
isi: 1
issue: '2'
language:
- iso: eng
month: '05'
oa: 1
oa_version: Submitted Version
page: 169 - 177
project:
- _id: 2533E772-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '638176'
name: 'Big Splash: Efficient Simulation of Natural Phenomena at Extremely Large
Scales'
publication: Computer Graphics Forum
publication_identifier:
issn:
- 0167-7055
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: Extended narrow band FLIP for liquid simulations
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 37
year: '2018'
...
---
_id: '1152'
abstract:
- lang: eng
text: We propose a new memetic strategy that can solve the multi-physics, complex
inverse problems, formulated as the multi-objective optimization ones, in which
objectives are misfits between the measured and simulated states of various governing
processes. The multi-deme structure of the strategy allows for both, intensive,
relatively cheap exploration with a moderate accuracy and more accurate search
many regions of Pareto set in parallel. The special type of selection operator
prefers the coherent alternative solutions, eliminating artifacts appearing in
the particular processes. The additional accuracy increment is obtained by the
parallel convex searches applied to the local scalarizations of the misfit vector.
The strategy is dedicated for solving ill-conditioned problems, for which inverting
the single physical process can lead to the ambiguous results. The skill of the
selection in artifact elimination is shown on the benchmark problem, while the
whole strategy was applied for identification of oil deposits, where the misfits
are related to various frequencies of the magnetic and electric waves of the magnetotelluric
measurements. 2016 Elsevier B.V.
article_processing_charge: No
author:
- first_name: Ewa P
full_name: Gajda-Zagorska, Ewa P
id: 47794CF0-F248-11E8-B48F-1D18A9856A87
last_name: Gajda-Zagorska
- first_name: Robert
full_name: Schaefer, Robert
last_name: Schaefer
- first_name: Maciej
full_name: Smołka, Maciej
last_name: Smołka
- first_name: David
full_name: Pardo, David
last_name: Pardo
- first_name: Julen
full_name: Alvarez Aramberri, Julen
last_name: Alvarez Aramberri
citation:
ama: Gajda-Zagorska EP, Schaefer R, Smołka M, Pardo D, Alvarez Aramberri J. A multi
objective memetic inverse solver reinforced by local optimization methods. Journal
of Computational Science. 2017;18:85-94. doi:10.1016/j.jocs.2016.06.007
apa: Gajda-Zagorska, E. P., Schaefer, R., Smołka, M., Pardo, D., & Alvarez Aramberri,
J. (2017). A multi objective memetic inverse solver reinforced by local optimization
methods. Journal of Computational Science. Elsevier. https://doi.org/10.1016/j.jocs.2016.06.007
chicago: Gajda-Zagorska, Ewa P, Robert Schaefer, Maciej Smołka, David Pardo, and
Julen Alvarez Aramberri. “A Multi Objective Memetic Inverse Solver Reinforced
by Local Optimization Methods.” Journal of Computational Science. Elsevier,
2017. https://doi.org/10.1016/j.jocs.2016.06.007.
ieee: E. P. Gajda-Zagorska, R. Schaefer, M. Smołka, D. Pardo, and J. Alvarez Aramberri,
“A multi objective memetic inverse solver reinforced by local optimization methods,”
Journal of Computational Science, vol. 18. Elsevier, pp. 85–94, 2017.
ista: Gajda-Zagorska EP, Schaefer R, Smołka M, Pardo D, Alvarez Aramberri J. 2017.
A multi objective memetic inverse solver reinforced by local optimization methods.
Journal of Computational Science. 18, 85–94.
mla: Gajda-Zagorska, Ewa P., et al. “A Multi Objective Memetic Inverse Solver Reinforced
by Local Optimization Methods.” Journal of Computational Science, vol.
18, Elsevier, 2017, pp. 85–94, doi:10.1016/j.jocs.2016.06.007.
short: E.P. Gajda-Zagorska, R. Schaefer, M. Smołka, D. Pardo, J. Alvarez Aramberri,
Journal of Computational Science 18 (2017) 85–94.
date_created: 2018-12-11T11:50:26Z
date_published: 2017-01-01T00:00:00Z
date_updated: 2025-07-10T11:50:11Z
day: '01'
ddc:
- '000'
department:
- _id: ChWo
doi: 10.1016/j.jocs.2016.06.007
external_id:
isi:
- '000393528700009'
file:
- access_level: open_access
content_type: application/pdf
creator: dernst
date_created: 2019-01-18T08:43:16Z
date_updated: 2019-01-18T08:43:16Z
file_id: '5842'
file_name: 2016_jocs_ewa.pdf
file_size: 1083911
relation: main_file
success: 1
file_date_updated: 2019-01-18T08:43:16Z
has_accepted_license: '1'
intvolume: ' 18'
isi: 1
language:
- iso: eng
month: '01'
oa: 1
oa_version: Submitted Version
page: 85 - 94
publication: Journal of Computational Science
publication_identifier:
issn:
- 1877-7503
publication_status: published
publisher: Elsevier
publist_id: '6206'
quality_controlled: '1'
scopus_import: '1'
status: public
title: A multi objective memetic inverse solver reinforced by local optimization methods
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 18
year: '2017'
...
---
_id: '1367'
abstract:
- lang: eng
text: One of the major challenges in physically based modelling is making simulations
efficient. Adaptive models provide an essential solution to these efficiency goals.
These models are able to self-adapt in space and time, attempting to provide the
best possible compromise between accuracy and speed. This survey reviews the adaptive
solutions proposed so far in computer graphics. Models are classified according
to the strategy they use for adaptation, from time-stepping and freezing techniques
to geometric adaptivity in the form of structured grids, meshes and particles.
Applications range from fluids, through deformable bodies, to articulated solids.
acknowledgement: This work was partly supported by the starting grants ADAPT and BigSplash,
as well as the advanced grant EXPRESSIVE from the European Research Council (ERC-2012-StG_20111012,
ERC-2014-StG_638176 and ERC-2011-ADG_20110209).
article_processing_charge: No
author:
- first_name: Pierre
full_name: Manteaux, Pierre
last_name: Manteaux
- first_name: Christopher J
full_name: Wojtan, Christopher J
id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87
last_name: Wojtan
orcid: 0000-0001-6646-5546
- first_name: Rahul
full_name: Narain, Rahul
last_name: Narain
- first_name: Stéphane
full_name: Redon, Stéphane
last_name: Redon
- first_name: François
full_name: Faure, François
last_name: Faure
- first_name: Marie
full_name: Cani, Marie
last_name: Cani
citation:
ama: Manteaux P, Wojtan C, Narain R, Redon S, Faure F, Cani M. Adaptive physically
based models in computer graphics. Computer Graphics Forum. 2017;36(6):312-337.
doi:10.1111/cgf.12941
apa: Manteaux, P., Wojtan, C., Narain, R., Redon, S., Faure, F., & Cani, M.
(2017). Adaptive physically based models in computer graphics. Computer Graphics
Forum. Wiley-Blackwell. https://doi.org/10.1111/cgf.12941
chicago: Manteaux, Pierre, Chris Wojtan, Rahul Narain, Stéphane Redon, François
Faure, and Marie Cani. “Adaptive Physically Based Models in Computer Graphics.”
Computer Graphics Forum. Wiley-Blackwell, 2017. https://doi.org/10.1111/cgf.12941.
ieee: P. Manteaux, C. Wojtan, R. Narain, S. Redon, F. Faure, and M. Cani, “Adaptive
physically based models in computer graphics,” Computer Graphics Forum,
vol. 36, no. 6. Wiley-Blackwell, pp. 312–337, 2017.
ista: Manteaux P, Wojtan C, Narain R, Redon S, Faure F, Cani M. 2017. Adaptive physically
based models in computer graphics. Computer Graphics Forum. 36(6), 312–337.
mla: Manteaux, Pierre, et al. “Adaptive Physically Based Models in Computer Graphics.”
Computer Graphics Forum, vol. 36, no. 6, Wiley-Blackwell, 2017, pp. 312–37,
doi:10.1111/cgf.12941.
short: P. Manteaux, C. Wojtan, R. Narain, S. Redon, F. Faure, M. Cani, Computer
Graphics Forum 36 (2017) 312–337.
date_created: 2018-12-11T11:51:37Z
date_published: 2017-09-01T00:00:00Z
date_updated: 2023-09-20T11:05:36Z
day: '01'
ddc:
- '000'
department:
- _id: ChWo
doi: 10.1111/cgf.12941
external_id:
isi:
- '000408634200019'
file:
- access_level: open_access
checksum: 7676e9a9ead6d58c3000988c97deb2ef
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:16:21Z
date_updated: 2020-07-14T12:44:47Z
file_id: '5208'
file_name: IST-2016-634-v1+1_starAdaptivity-cgf.pdf
file_size: 1434439
relation: main_file
file_date_updated: 2020-07-14T12:44:47Z
has_accepted_license: '1'
intvolume: ' 36'
isi: 1
issue: '6'
language:
- iso: eng
month: '09'
oa: 1
oa_version: Submitted Version
page: 312 - 337
publication: Computer Graphics Forum
publication_identifier:
issn:
- '01677055'
publication_status: published
publisher: Wiley-Blackwell
publist_id: '5873'
pubrep_id: '634'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Adaptive physically based models in computer graphics
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 36
year: '2017'
...
---
_id: '670'
abstract:
- lang: eng
text: We propose an efficient method to model paper tearing in the context of interactive
modeling. The method uses geometrical information to automatically detect potential
starting points of tears. We further introduce a new hybrid geometrical and physical-based
method to compute the trajectory of tears while procedurally synthesizing high
resolution details of the tearing path using a texture based approach. The results
obtained are compared with real paper and with previous studies on the expected
geometric paths of paper that tears.
article_processing_charge: No
article_type: original
author:
- first_name: Camille
full_name: Schreck, Camille
id: 2B14B676-F248-11E8-B48F-1D18A9856A87
last_name: Schreck
- first_name: Damien
full_name: Rohmer, Damien
last_name: Rohmer
- first_name: Stefanie
full_name: Hahmann, Stefanie
last_name: Hahmann
citation:
ama: Schreck C, Rohmer D, Hahmann S. Interactive paper tearing. Computer Graphics
Forum. 2017;36(2):95-106. doi:10.1111/cgf.13110
apa: Schreck, C., Rohmer, D., & Hahmann, S. (2017). Interactive paper tearing.
Computer Graphics Forum. Wiley. https://doi.org/10.1111/cgf.13110
chicago: Schreck, Camille, Damien Rohmer, and Stefanie Hahmann. “Interactive Paper
Tearing.” Computer Graphics Forum. Wiley, 2017. https://doi.org/10.1111/cgf.13110.
ieee: C. Schreck, D. Rohmer, and S. Hahmann, “Interactive paper tearing,” Computer
Graphics Forum, vol. 36, no. 2. Wiley, pp. 95–106, 2017.
ista: Schreck C, Rohmer D, Hahmann S. 2017. Interactive paper tearing. Computer
Graphics Forum. 36(2), 95–106.
mla: Schreck, Camille, et al. “Interactive Paper Tearing.” Computer Graphics
Forum, vol. 36, no. 2, Wiley, 2017, pp. 95–106, doi:10.1111/cgf.13110.
short: C. Schreck, D. Rohmer, S. Hahmann, Computer Graphics Forum 36 (2017) 95–106.
date_created: 2018-12-11T11:47:49Z
date_published: 2017-05-01T00:00:00Z
date_updated: 2025-09-11T07:02:03Z
day: '01'
ddc:
- '000'
department:
- _id: ChWo
doi: 10.1111/cgf.13110
external_id:
isi:
- '000404474000011'
intvolume: ' 36'
isi: 1
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://hal.inria.fr/hal-01647113/file/eg_2017_schreck_paper_tearing.pdf
month: '05'
oa: 1
oa_version: Published Version
page: 95 - 106
project:
- _id: 25357BD2-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P 24352-N23
name: 'Deep Pictures: Creating Visual and Haptic Vector Images'
publication: Computer Graphics Forum
publication_identifier:
issn:
- '01677055'
publication_status: published
publisher: Wiley
publist_id: '7056'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Interactive paper tearing
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 36
year: '2017'
...
---
_id: '998'
abstract:
- lang: eng
text: 'A major open problem on the road to artificial intelligence is the development
of incrementally learning systems that learn about more and more concepts over
time from a stream of data. In this work, we introduce a new training strategy,
iCaRL, that allows learning in such a class-incremental way: only the training
data for a small number of classes has to be present at the same time and new
classes can be added progressively. iCaRL learns strong classifiers and a data
representation simultaneously. This distinguishes it from earlier works that were
fundamentally limited to fixed data representations and therefore incompatible
with deep learning architectures. We show by experiments on CIFAR-100 and ImageNet
ILSVRC 2012 data that iCaRL can learn many classes incrementally over a long period
of time where other strategies quickly fail. '
article_processing_charge: No
arxiv: 1
author:
- first_name: Sylvestre Alvise
full_name: Rebuffi, Sylvestre Alvise
last_name: Rebuffi
- first_name: Alexander
full_name: Kolesnikov, Alexander
id: 2D157DB6-F248-11E8-B48F-1D18A9856A87
last_name: Kolesnikov
- first_name: Georg
full_name: Sperl, Georg
id: 4DD40360-F248-11E8-B48F-1D18A9856A87
last_name: Sperl
- first_name: Christoph
full_name: Lampert, Christoph
id: 40C20FD2-F248-11E8-B48F-1D18A9856A87
last_name: Lampert
orcid: 0000-0001-8622-7887
citation:
ama: 'Rebuffi SA, Kolesnikov A, Sperl G, Lampert C. iCaRL: Incremental classifier
and representation learning. In: Vol 2017. IEEE; 2017:5533-5542. doi:10.1109/CVPR.2017.587'
apa: 'Rebuffi, S. A., Kolesnikov, A., Sperl, G., & Lampert, C. (2017). iCaRL:
Incremental classifier and representation learning (Vol. 2017, pp. 5533–5542).
Presented at the CVPR: Computer Vision and Pattern Recognition, Honolulu, HA,
United States: IEEE. https://doi.org/10.1109/CVPR.2017.587'
chicago: 'Rebuffi, Sylvestre Alvise, Alexander Kolesnikov, Georg Sperl, and Christoph
Lampert. “ICaRL: Incremental Classifier and Representation Learning,” 2017:5533–42.
IEEE, 2017. https://doi.org/10.1109/CVPR.2017.587.'
ieee: 'S. A. Rebuffi, A. Kolesnikov, G. Sperl, and C. Lampert, “iCaRL: Incremental
classifier and representation learning,” presented at the CVPR: Computer Vision
and Pattern Recognition, Honolulu, HA, United States, 2017, vol. 2017, pp. 5533–5542.'
ista: 'Rebuffi SA, Kolesnikov A, Sperl G, Lampert C. 2017. iCaRL: Incremental classifier
and representation learning. CVPR: Computer Vision and Pattern Recognition vol.
2017, 5533–5542.'
mla: 'Rebuffi, Sylvestre Alvise, et al. ICaRL: Incremental Classifier and Representation
Learning. Vol. 2017, IEEE, 2017, pp. 5533–42, doi:10.1109/CVPR.2017.587.'
short: S.A. Rebuffi, A. Kolesnikov, G. Sperl, C. Lampert, in:, IEEE, 2017, pp. 5533–5542.
conference:
end_date: 2017-07-26
location: Honolulu, HA, United States
name: 'CVPR: Computer Vision and Pattern Recognition'
start_date: 2017-07-21
date_created: 2018-12-11T11:49:37Z
date_published: 2017-04-14T00:00:00Z
date_updated: 2025-06-04T08:18:32Z
day: '14'
department:
- _id: ChLa
- _id: ChWo
doi: 10.1109/CVPR.2017.587
ec_funded: 1
external_id:
arxiv:
- '1611.07725'
isi:
- '000418371405066'
intvolume: ' 2017'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1611.07725
month: '04'
oa: 1
oa_version: Submitted Version
page: 5533 - 5542
project:
- _id: 2532554C-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '308036'
name: Lifelong Learning of Visual Scene Understanding
publication_identifier:
isbn:
- 978-153860457-1
publication_status: published
publisher: IEEE
publist_id: '6400'
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'iCaRL: Incremental classifier and representation learning'
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 2017
year: '2017'
...
---
OA_place: publisher
_id: '839'
abstract:
- lang: eng
text: 'This thesis describes a brittle fracture simulation method for visual effects
applications. Building upon a symmetric Galerkin boundary element method, we first
compute stress intensity factors following the theory of linear elastic fracture
mechanics. We then use these stress intensities to simulate the motion of a propagating
crack front at a significantly higher resolution than the overall deformation
of the breaking object. Allowing for spatial variations of the material''s toughness
during crack propagation produces visually realistic, highly-detailed fracture
surfaces. Furthermore, we introduce approximations for stress intensities and
crack opening displacements, resulting in both practical speed-up and theoretically
superior runtime complexity compared to previous methods. While we choose a quasi-static
approach to fracture mechanics, ignoring dynamic deformations, we also couple
our fracture simulation framework to a standard rigid-body dynamics solver, enabling
visual effects artists to simulate both large scale motion, as well as fracturing
due to collision forces in a combined system. As fractures inside of an object
grow, their geometry must be represented both in the coarse boundary element mesh,
as well as at the desired fine output resolution. Using a boundary element method,
we avoid complicated volumetric meshing operations. Instead we describe a simple
set of surface meshing operations that allow us to progressively add cracks to
the mesh of an object and still re-use all previously computed entries of the
linear boundary element system matrix. On the high resolution level, we opt for
an implicit surface representation. We then describe how to capture fracture surfaces
during crack propagation, as well as separate the individual fragments resulting
from the fracture process, based on this implicit representation. We show results
obtained with our method, either solving the full boundary element system in every
time step, or alternatively using our fast approximations. These results demonstrate
that both of these methods perform well in basic test cases and produce realistic
fracture surfaces. Furthermore we show that our fast approximations substantially
out-perform the standard approach in more demanding scenarios. Finally, these
two methods naturally combine, using the full solution while the problem size
is manageably small and switching to the fast approximations later on. The resulting
hybrid method gives the user a direct way to choose between speed and accuracy
of the simulation. '
acknowledgement: "ERC H2020 programme (grant agreement no. 638176)\r\nFirst of all,
let me thank my committee members, especially my supervisor, Chris\r\nWojtan, for
supporting me throughout my PhD. Obviously, none of this work would\r\nhave been
possible without you.\r\nFurthermore, Thank You to all the people who have contributed
to this work in various\r\nways, in particular Martin Schanz and his group for providing
and supporting the\r\nHyENA boundary element library, as well as Eder Miguel and
Morten Bojsen-Hansen\r\nfor (repeatedly) proof reading and providing valuable suggestions
during the writing\r\nof this thesis.\r\nI would also like to thank Bernd Bickel,
and all the members – past and present – of his\r\nand Chris’ research groups at
IST Austria for always providing honest and insightful\r\nfeedback throughout many
joint group meetings, as well as Christopher Batty, Eitan\r\nGrinspun, and Fang
Da for many insights into boundary element methods during our\r\ncollaboration.\r\nAs
only virtual objects have been harmed in the process of creating this work, I would\r\nlike
to acknowledge the Stanford scanning repository for providing the “Bunny” and\r\n“Armadillo”
models, the AIM@SHAPE repository for “Pierre’s hand, watertight”, and\r\nS. Gainsbourg
for the “Column” via Archive3D.net. Sorry for breaking these models\r\nin many different
ways.\r\n"
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: David
full_name: Hahn, David
id: 357A6A66-F248-11E8-B48F-1D18A9856A87
last_name: Hahn
citation:
ama: Hahn D. Brittle fracture simulation with boundary elements for computer graphics.
2017. doi:10.15479/AT:ISTA:th_855
apa: Hahn, D. (2017). Brittle fracture simulation with boundary elements for
computer graphics. Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:th_855
chicago: Hahn, David. “Brittle Fracture Simulation with Boundary Elements for Computer
Graphics.” Institute of Science and Technology Austria, 2017. https://doi.org/10.15479/AT:ISTA:th_855.
ieee: D. Hahn, “Brittle fracture simulation with boundary elements for computer
graphics,” Institute of Science and Technology Austria, 2017.
ista: Hahn D. 2017. Brittle fracture simulation with boundary elements for computer
graphics. Institute of Science and Technology Austria.
mla: Hahn, David. Brittle Fracture Simulation with Boundary Elements for Computer
Graphics. Institute of Science and Technology Austria, 2017, doi:10.15479/AT:ISTA:th_855.
short: D. Hahn, Brittle Fracture Simulation with Boundary Elements for Computer
Graphics, Institute of Science and Technology Austria, 2017.
corr_author: '1'
date_created: 2018-12-11T11:48:47Z
date_published: 2017-08-14T00:00:00Z
date_updated: 2026-04-08T14:20:16Z
day: '14'
ddc:
- '004'
- '005'
- '006'
- '531'
- '621'
degree_awarded: PhD
department:
- _id: ChWo
doi: 10.15479/AT:ISTA:th_855
ec_funded: 1
file:
- access_level: open_access
checksum: 6c1ae8c90bfaba5e089417fefbc4a272
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:14:46Z
date_updated: 2020-07-14T12:48:13Z
file_id: '5100'
file_name: IST-2017-855-v1+1_thesis_online_pdfA.pdf
file_size: 14596191
relation: main_file
- access_level: closed
checksum: 421672f68d563b029869c5cf1713f919
content_type: application/zip
creator: dernst
date_created: 2019-04-05T08:40:30Z
date_updated: 2020-07-14T12:48:13Z
file_id: '6207'
file_name: 2017_thesis_Hahn_source.zip
file_size: 15060566
relation: source_file
file_date_updated: 2020-07-14T12:48:13Z
has_accepted_license: '1'
language:
- iso: eng
license: https://creativecommons.org/licenses/by-sa/4.0/
month: '08'
oa: 1
oa_version: Published Version
page: '124'
project:
- _id: 2533E772-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '638176'
name: 'Big Splash: Efficient Simulation of Natural Phenomena at Extremely Large
Scales'
publication_identifier:
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
publist_id: '6809'
pubrep_id: '855'
related_material:
record:
- id: '5568'
relation: popular_science
status: public
- id: '1362'
relation: part_of_dissertation
status: public
- id: '1633'
relation: part_of_dissertation
status: public
status: public
supervisor:
- first_name: Christopher J
full_name: Wojtan, Christopher J
id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87
last_name: Wojtan
orcid: 0000-0001-6646-5546
title: Brittle fracture simulation with boundary elements for computer graphics
tmp:
image: /images/cc_by_sa.png
legal_code_url: https://creativecommons.org/licenses/by-sa/4.0/legalcode
name: Creative Commons Attribution-ShareAlike 4.0 International Public License (CC
BY-SA 4.0)
short: CC BY-SA (4.0)
type: dissertation
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
year: '2017'
...
---
_id: '5568'
abstract:
- lang: eng
text: Includes source codes, test cases, and example data used in the thesis Brittle
Fracture Simulation with Boundary Elements for Computer Graphics. Also includes
pre-built binaries of the HyENA library, but not sources - please contact the
HyENA authors to obtain these sources if required (https://mech.tugraz.at/hyena)
article_processing_charge: No
author:
- first_name: David
full_name: Hahn, David
id: 357A6A66-F248-11E8-B48F-1D18A9856A87
last_name: Hahn
citation:
ama: 'Hahn D. Source codes: Brittle fracture simulation with boundary elements for
computer graphics. 2017. doi:10.15479/AT:ISTA:73'
apa: 'Hahn, D. (2017). Source codes: Brittle fracture simulation with boundary elements
for computer graphics. Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:73'
chicago: 'Hahn, David. “Source Codes: Brittle Fracture Simulation with Boundary
Elements for Computer Graphics.” Institute of Science and Technology Austria,
2017. https://doi.org/10.15479/AT:ISTA:73.'
ieee: 'D. Hahn, “Source codes: Brittle fracture simulation with boundary elements
for computer graphics.” Institute of Science and Technology Austria, 2017.'
ista: 'Hahn D. 2017. Source codes: Brittle fracture simulation with boundary elements
for computer graphics, Institute of Science and Technology Austria, 10.15479/AT:ISTA:73.'
mla: 'Hahn, David. Source Codes: Brittle Fracture Simulation with Boundary Elements
for Computer Graphics. Institute of Science and Technology Austria, 2017,
doi:10.15479/AT:ISTA:73.'
short: D. Hahn, (2017).
datarep_id: '73'
date_created: 2018-12-12T12:31:35Z
date_published: 2017-08-16T00:00:00Z
date_updated: 2026-04-08T14:20:15Z
day: '16'
ddc:
- '004'
department:
- _id: ChWo
doi: 10.15479/AT:ISTA:73
ec_funded: 1
file:
- access_level: open_access
checksum: 2323a755842a3399cbc47d76545fc9a0
content_type: application/zip
creator: system
date_created: 2018-12-12T13:02:57Z
date_updated: 2020-07-14T12:47:04Z
file_id: '5615'
file_name: IST-2017-73-v1+1_FractureRB_v1.1_2017_07_20_final_public.zip
file_size: 199353471
relation: main_file
file_date_updated: 2020-07-14T12:47:04Z
has_accepted_license: '1'
keyword:
- Boundary elements
- brittle fracture
- computer graphics
- fracture simulation
month: '08'
oa: 1
oa_version: Published Version
project:
- _id: 2533E772-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '638176'
name: 'Big Splash: Efficient Simulation of Natural Phenomena at Extremely Large
Scales'
publisher: Institute of Science and Technology Austria
related_material:
record:
- id: '839'
relation: research_paper
status: public
status: public
title: 'Source codes: Brittle fracture simulation with boundary elements for computer
graphics'
tmp:
image: /images/cc_by_sa.png
legal_code_url: https://creativecommons.org/licenses/by-sa/4.0/legalcode
name: Creative Commons Attribution-ShareAlike 4.0 International Public License (CC
BY-SA 4.0)
short: CC BY-SA (4.0)
type: research_data
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2017'
...
---
_id: '470'
abstract:
- lang: eng
text: This paper presents a method for simulating water surface waves as a displacement
field on a 2D domain. Our method relies on Lagrangian particles that carry packets
of water wave energy; each packet carries information about an entire group of
wave trains, as opposed to only a single wave crest. Our approach is unconditionally
stable and can simulate high resolution geometric details. This approach also
presents a straightforward interface for artistic control, because it is essentially
a particle system with intuitive parameters like wavelength and amplitude. Our
implementation parallelizes well and runs in real time for moderately challenging
scenarios.
acknowledged_ssus:
- _id: ScienComp
article_number: '103'
article_processing_charge: Yes (in subscription journal)
article_type: original
author:
- first_name: Stefan
full_name: Jeschke, Stefan
id: 44D6411A-F248-11E8-B48F-1D18A9856A87
last_name: Jeschke
orcid: 0000-0003-4330-8884
- first_name: Christopher J
full_name: Wojtan, Christopher J
id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87
last_name: Wojtan
orcid: 0000-0001-6646-5546
citation:
ama: Jeschke S, Wojtan C. Water wave packets. ACM Transactions on Graphics.
2017;36(4). doi:10.1145/3072959.3073678
apa: Jeschke, S., & Wojtan, C. (2017). Water wave packets. ACM Transactions
on Graphics. ACM. https://doi.org/10.1145/3072959.3073678
chicago: Jeschke, Stefan, and Chris Wojtan. “Water Wave Packets.” ACM Transactions
on Graphics. ACM, 2017. https://doi.org/10.1145/3072959.3073678.
ieee: S. Jeschke and C. Wojtan, “Water wave packets,” ACM Transactions on Graphics,
vol. 36, no. 4. ACM, 2017.
ista: Jeschke S, Wojtan C. 2017. Water wave packets. ACM Transactions on Graphics.
36(4), 103.
mla: Jeschke, Stefan, and Chris Wojtan. “Water Wave Packets.” ACM Transactions
on Graphics, vol. 36, no. 4, 103, ACM, 2017, doi:10.1145/3072959.3073678.
short: S. Jeschke, C. Wojtan, ACM Transactions on Graphics 36 (2017).
date_created: 2018-12-11T11:46:39Z
date_published: 2017-07-01T00:00:00Z
date_updated: 2026-04-16T09:58:39Z
day: '01'
ddc:
- '006'
department:
- _id: ChWo
doi: 10.1145/3072959.3073678
ec_funded: 1
external_id:
isi:
- '000406432100071'
file:
- access_level: open_access
checksum: 82a3b2bfeee4ddef16ecc21675d1a48a
content_type: application/pdf
creator: wojtan
date_created: 2020-01-24T09:32:35Z
date_updated: 2020-07-14T12:46:34Z
file_id: '7359'
file_name: wavepackets_final.pdf
file_size: 13131683
relation: main_file
file_date_updated: 2020-07-14T12:46:34Z
has_accepted_license: '1'
intvolume: ' 36'
isi: 1
issue: '4'
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
project:
- _id: 2533E772-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '638176'
name: 'Big Splash: Efficient Simulation of Natural Phenomena at Extremely Large
Scales'
publication: ACM Transactions on Graphics
publication_identifier:
issn:
- 0730-0301
publication_status: published
publisher: ACM
publist_id: '7350'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Water wave packets
type: journal_article
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
volume: 36
year: '2017'
...
---
_id: '1361'
abstract:
- lang: eng
text: We propose a novel surface-only technique for simulating incompressible, inviscid
and uniform-density liquids with surface tension in three dimensions. The liquid
surface is captured by a triangle mesh on which a Lagrangian velocity field is
stored. Because advection of the velocity field may violate the incompressibility
condition, we devise an orthogonal projection technique to remove the divergence
while requiring the evaluation of only two boundary integrals. The forces of surface
tension, gravity, and solid contact are all treated by a boundary element solve,
allowing us to perform detailed simulations of a wide range of liquid phenomena,
including waterbells, droplet and jet collisions, fluid chains, and crown splashes.
alternative_title:
- ACM Transactions on Graphics
article_number: a78
article_processing_charge: No
author:
- first_name: Fang
full_name: Da, Fang
last_name: Da
- first_name: David
full_name: Hahn, David
id: 357A6A66-F248-11E8-B48F-1D18A9856A87
last_name: Hahn
- first_name: Christopher
full_name: Batty, Christopher
last_name: Batty
- first_name: Christopher J
full_name: Wojtan, Christopher J
id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87
last_name: Wojtan
orcid: 0000-0001-6646-5546
- first_name: Eitan
full_name: Grinspun, Eitan
last_name: Grinspun
citation:
ama: 'Da F, Hahn D, Batty C, Wojtan C, Grinspun E. Surface only liquids. In: Vol
35. ACM; 2016. doi:10.1145/2897824.2925899'
apa: 'Da, F., Hahn, D., Batty, C., Wojtan, C., & Grinspun, E. (2016). Surface
only liquids (Vol. 35). Presented at the ACM SIGGRAPH, Anaheim, CA, USA: ACM.
https://doi.org/10.1145/2897824.2925899'
chicago: Da, Fang, David Hahn, Christopher Batty, Chris Wojtan, and Eitan Grinspun.
“Surface Only Liquids,” Vol. 35. ACM, 2016. https://doi.org/10.1145/2897824.2925899.
ieee: F. Da, D. Hahn, C. Batty, C. Wojtan, and E. Grinspun, “Surface only liquids,”
presented at the ACM SIGGRAPH, Anaheim, CA, USA, 2016, vol. 35, no. 4.
ista: Da F, Hahn D, Batty C, Wojtan C, Grinspun E. 2016. Surface only liquids. ACM
SIGGRAPH, ACM Transactions on Graphics, vol. 35, a78.
mla: Da, Fang, et al. Surface Only Liquids. Vol. 35, no. 4, a78, ACM, 2016,
doi:10.1145/2897824.2925899.
short: F. Da, D. Hahn, C. Batty, C. Wojtan, E. Grinspun, in:, ACM, 2016.
conference:
end_date: 2016-07-28
location: Anaheim, CA, USA
name: ACM SIGGRAPH
start_date: 2016-07-24
date_created: 2018-12-11T11:51:35Z
date_published: 2016-07-11T00:00:00Z
date_updated: 2025-09-22T07:44:26Z
day: '11'
ddc:
- '000'
department:
- _id: ChWo
doi: 10.1145/2897824.2925899
ec_funded: 1
external_id:
isi:
- '000380112400048'
file:
- access_level: open_access
checksum: 6d662893bd447d4f575b4961a2247811
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:08:01Z
date_updated: 2020-07-14T12:44:46Z
file_id: '4660'
file_name: IST-2016-637-v1+1_2016_Da_SOL.pdf
file_size: 10561865
relation: main_file
file_date_updated: 2020-07-14T12:44:46Z
has_accepted_license: '1'
intvolume: ' 35'
isi: 1
issue: '4'
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
project:
- _id: 2533E772-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '638176'
name: 'Big Splash: Efficient Simulation of Natural Phenomena at Extremely Large
Scales'
publication_status: published
publisher: ACM
publist_id: '5881'
pubrep_id: '637'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Surface only liquids
type: conference
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 35
year: '2016'
...
---
_id: '1363'
abstract:
- lang: eng
text: When aiming to seamlessly integrate a fluid simulation into a larger scenario
(like an open ocean), careful attention must be paid to boundary conditions. In
particular, one must implement special "non-reflecting" boundary conditions,
which dissipate out-going waves as they exit the simulation. Unfortunately, the
state of the art in non-reflecting boundary conditions (perfectly-matched layers,
or PMLs) only permits trivially simple inflow/outflow conditions, so there is
no reliable way to integrate a fluid simulation into a more complicated environment
like a stormy ocean or a turbulent river. This paper introduces the first method
for combining nonreflecting boundary conditions based on PMLs with inflow/outflow
boundary conditions that vary arbitrarily throughout space and time. Our algorithm
is a generalization of stateof- the-art mean-flow boundary conditions in the computational
fluid dynamics literature, and it allows for seamless integration of a fluid simulation
into much more complicated environments. Our method also opens the door for previously-unseen
postprocess effects like retroactively changing the location of solid obstacles,
and locally increasing the visual detail of a pre-existing simulation.
acknowledged_ssus:
- _id: ScienComp
acknowledgement: 'We thank the IST Austria Visual Computing group for helpful feedback
throughout the project. '
alternative_title:
- ACM Transactions on Graphics
article_number: '96'
article_processing_charge: No
author:
- first_name: Morten
full_name: Bojsen-Hansen, Morten
id: 439F0C8C-F248-11E8-B48F-1D18A9856A87
last_name: Bojsen-Hansen
orcid: 0000-0002-4417-3224
- first_name: Christopher J
full_name: Wojtan, Christopher J
id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87
last_name: Wojtan
orcid: 0000-0001-6646-5546
citation:
ama: 'Bojsen-Hansen M, Wojtan C. Generalized non-reflecting boundaries for fluid
re-simulation. In: Vol 35. ACM; 2016. doi:10.1145/2897824.2925963'
apa: 'Bojsen-Hansen, M., & Wojtan, C. (2016). Generalized non-reflecting boundaries
for fluid re-simulation (Vol. 35). Presented at the ACM SIGGRAPH, Anaheim, CA,
USA: ACM. https://doi.org/10.1145/2897824.2925963'
chicago: Bojsen-Hansen, Morten, and Chris Wojtan. “Generalized Non-Reflecting Boundaries
for Fluid Re-Simulation,” Vol. 35. ACM, 2016. https://doi.org/10.1145/2897824.2925963.
ieee: M. Bojsen-Hansen and C. Wojtan, “Generalized non-reflecting boundaries for
fluid re-simulation,” presented at the ACM SIGGRAPH, Anaheim, CA, USA, 2016, vol.
35, no. 4.
ista: Bojsen-Hansen M, Wojtan C. 2016. Generalized non-reflecting boundaries for
fluid re-simulation. ACM SIGGRAPH, ACM Transactions on Graphics, vol. 35, 96.
mla: Bojsen-Hansen, Morten, and Chris Wojtan. Generalized Non-Reflecting Boundaries
for Fluid Re-Simulation. Vol. 35, no. 4, 96, ACM, 2016, doi:10.1145/2897824.2925963.
short: M. Bojsen-Hansen, C. Wojtan, in:, ACM, 2016.
conference:
end_date: 2016-07-28
location: Anaheim, CA, USA
name: ACM SIGGRAPH
start_date: 2016-07-24
corr_author: '1'
date_created: 2018-12-11T11:51:35Z
date_published: 2016-07-11T00:00:00Z
date_updated: 2025-09-22T07:43:01Z
day: '11'
ddc:
- '000'
department:
- _id: ChWo
doi: 10.1145/2897824.2925963
ec_funded: 1
external_id:
isi:
- '000380112400066'
file:
- access_level: open_access
checksum: 140b5532f0a2a006a0149cab7c73c17c
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:13:00Z
date_updated: 2020-07-14T12:44:47Z
file_id: '4981'
file_name: IST-2016-631-v1+2_a96-bojsen-hansen.pdf
file_size: 12422760
relation: main_file
file_date_updated: 2020-07-14T12:44:47Z
has_accepted_license: '1'
intvolume: ' 35'
isi: 1
issue: '4'
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
project:
- _id: 2533E772-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '638176'
name: 'Big Splash: Efficient Simulation of Natural Phenomena at Extremely Large
Scales'
publication_status: published
publisher: ACM
publist_id: '5879'
pubrep_id: '631'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Generalized non-reflecting boundaries for fluid re-simulation
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: conference
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 35
year: '2016'
...
---
_id: '1412'
abstract:
- lang: eng
text: Combining high-resolution level set surface tracking with lower resolution
physics is an inexpensive method for achieving highly detailed liquid animations.
Unfortunately, the inherent resolution mismatch introduces several types of disturbing
visual artifacts. We identify the primary sources of these artifacts and present
simple, efficient, and practical solutions to address them. First, we propose
an unconditionally stable filtering method that selectively removes sub-grid surface
artifacts not seen by the fluid physics, while preserving fine detail in dynamic
splashing regions. It provides comparable results to recent error-correction techniques
at lower cost, without substepping, and with better scaling behavior. Second,
we show how a modified narrow-band scheme can ensure accurate free surface boundary
conditions in the presence of large resolution mismatches. Our scheme preserves
the efficiency of the narrow-band methodology, while eliminating objectionable
stairstep artifacts observed in prior work. Third, we demonstrate that the use
of linear interpolation of velocity during advection of the high-resolution level
set surface is responsible for visible grid-aligned kinks; we therefore advocate
higher-order velocity interpolation, and show that it dramatically reduces this
artifact. While these three contributions are orthogonal, our results demonstrate
that taken together they efficiently address the dominant sources of visual artifacts
arising with high-resolution embedded liquid surfaces; the proposed approach offers
improved visual quality, a straightforward implementation, and substantially greater
scalability than competing methods.
acknowledgement: 'This research was supported by NSERC (RGPIN-04360-2014) and IST
Austria. '
article_processing_charge: No
author:
- first_name: Ryan
full_name: Goldade, Ryan
last_name: Goldade
- first_name: Christopher
full_name: Batty, Christopher
last_name: Batty
- first_name: Christopher J
full_name: Wojtan, Christopher J
id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87
last_name: Wojtan
orcid: 0000-0001-6646-5546
citation:
ama: Goldade R, Batty C, Wojtan C. A practical method for high-resolution embedded
liquid surfaces. Computer Graphics Forum. 2016;35(2):233-242. doi:10.1111/cgf.12826
apa: Goldade, R., Batty, C., & Wojtan, C. (2016). A practical method for high-resolution
embedded liquid surfaces. Computer Graphics Forum. Wiley-Blackwell. https://doi.org/10.1111/cgf.12826
chicago: Goldade, Ryan, Christopher Batty, and Chris Wojtan. “A Practical Method
for High-Resolution Embedded Liquid Surfaces.” Computer Graphics Forum.
Wiley-Blackwell, 2016. https://doi.org/10.1111/cgf.12826.
ieee: R. Goldade, C. Batty, and C. Wojtan, “A practical method for high-resolution
embedded liquid surfaces,” Computer Graphics Forum, vol. 35, no. 2. Wiley-Blackwell,
pp. 233–242, 2016.
ista: Goldade R, Batty C, Wojtan C. 2016. A practical method for high-resolution
embedded liquid surfaces. Computer Graphics Forum. 35(2), 233–242.
mla: Goldade, Ryan, et al. “A Practical Method for High-Resolution Embedded Liquid
Surfaces.” Computer Graphics Forum, vol. 35, no. 2, Wiley-Blackwell, 2016,
pp. 233–42, doi:10.1111/cgf.12826.
short: R. Goldade, C. Batty, C. Wojtan, Computer Graphics Forum 35 (2016) 233–242.
date_created: 2018-12-11T11:51:52Z
date_published: 2016-05-27T00:00:00Z
date_updated: 2025-09-18T14:26:23Z
day: '27'
ddc:
- '000'
department:
- _id: ChWo
doi: 10.1111/cgf.12826
ec_funded: 1
external_id:
isi:
- '000377222200022'
file:
- access_level: open_access
checksum: 8e61387ee2e3bd0e776fbe301629bfd9
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:13:18Z
date_updated: 2020-07-14T12:44:53Z
file_id: '5000'
file_name: IST-2016-612-v1+2_Wojtan_APracticalMethod_PostPrint_2016.pdf
file_size: 15873858
relation: main_file
file_date_updated: 2020-07-14T12:44:53Z
has_accepted_license: '1'
intvolume: ' 35'
isi: 1
issue: '2'
language:
- iso: eng
month: '05'
oa: 1
oa_version: Submitted Version
page: 233 - 242
project:
- _id: 2533E772-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '638176'
name: 'Big Splash: Efficient Simulation of Natural Phenomena at Extremely Large
Scales'
publication: Computer Graphics Forum
publication_status: published
publisher: Wiley-Blackwell
publist_id: '5795'
pubrep_id: '612'
quality_controlled: '1'
scopus_import: '1'
status: public
title: A practical method for high-resolution embedded liquid surfaces
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 35
year: '2016'
...
---
_id: '1413'
abstract:
- lang: eng
text: This paper generalizes the well-known Diffusion Curves Images (DCI), which
are composed of a set of Bezier curves with colors specified on either side. These
colors are diffused as Laplace functions over the image domain, which results
in smooth color gradients interrupted by the Bezier curves. Our new formulation
allows for more color control away from the boundary, providing a similar expressive
power as recent Bilaplace image models without introducing associated issues and
computational costs. The new model is based on a special Laplace function blending
and a new edge blur formulation. We demonstrate that given some user-defined boundary
curves over an input raster image, fitting colors and edge blur from the image
to the new model and subsequent editing and animation is equally convenient as
with DCIs. Numerous examples and comparisons to DCIs are presented.
article_processing_charge: No
author:
- first_name: Stefan
full_name: Jeschke, Stefan
id: 44D6411A-F248-11E8-B48F-1D18A9856A87
last_name: Jeschke
citation:
ama: 'Jeschke S. Generalized diffusion curves: An improved vector representation
for smooth-shaded images. Computer Graphics Forum. 2016;35(2):71-79. doi:10.1111/cgf.12812'
apa: 'Jeschke, S. (2016). Generalized diffusion curves: An improved vector representation
for smooth-shaded images. Computer Graphics Forum. Wiley-Blackwell. https://doi.org/10.1111/cgf.12812'
chicago: 'Jeschke, Stefan. “Generalized Diffusion Curves: An Improved Vector Representation
for Smooth-Shaded Images.” Computer Graphics Forum. Wiley-Blackwell, 2016.
https://doi.org/10.1111/cgf.12812.'
ieee: 'S. Jeschke, “Generalized diffusion curves: An improved vector representation
for smooth-shaded images,” Computer Graphics Forum, vol. 35, no. 2. Wiley-Blackwell,
pp. 71–79, 2016.'
ista: 'Jeschke S. 2016. Generalized diffusion curves: An improved vector representation
for smooth-shaded images. Computer Graphics Forum. 35(2), 71–79.'
mla: 'Jeschke, Stefan. “Generalized Diffusion Curves: An Improved Vector Representation
for Smooth-Shaded Images.” Computer Graphics Forum, vol. 35, no. 2, Wiley-Blackwell,
2016, pp. 71–79, doi:10.1111/cgf.12812.'
short: S. Jeschke, Computer Graphics Forum 35 (2016) 71–79.
corr_author: '1'
date_created: 2018-12-11T11:51:53Z
date_published: 2016-05-01T00:00:00Z
date_updated: 2025-09-18T14:25:33Z
day: '01'
department:
- _id: ChWo
doi: 10.1111/cgf.12812
external_id:
isi:
- '000377222200008'
intvolume: ' 35'
isi: 1
issue: '2'
language:
- iso: eng
month: '05'
oa_version: None
page: 71 - 79
project:
- _id: 25357BD2-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P 24352-N23
name: 'Deep Pictures: Creating Visual and Haptic Vector Images'
publication: Computer Graphics Forum
publication_status: published
publisher: Wiley-Blackwell
publist_id: '5794'
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Generalized diffusion curves: An improved vector representation for smooth-shaded
images'
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 35
year: '2016'
...
---
_id: '1415'
abstract:
- lang: eng
text: The Fluid Implicit Particle method (FLIP) for liquid simulations uses particles
to reduce numerical dissipation and provide important visual cues for events like
complex splashes and small-scale features near the liquid surface. Unfortunately,
FLIP simulations can be computationally expensive, because they require a dense
sampling of particles to fill the entire liquid volume. Furthermore, the vast
majority of these FLIP particles contribute nothing to the fluid's visual appearance,
especially for larger volumes of liquid. We present a method that only uses FLIP
particles within a narrow band of the liquid surface, while efficiently representing
the remaining inner volume on a regular grid. We show that a naïve realization
of this idea introduces unstable and uncontrollable energy fluctuations, and we
propose a novel coupling scheme between FLIP particles and regular grid which
overcomes this problem. Our method drastically reduces the particle count and
simulation times while yielding results that are nearly indistinguishable from
regular FLIP simulations. Our approach is easy to integrate into any existing
FLIP implementation.
article_processing_charge: No
author:
- first_name: Florian
full_name: Ferstl, Florian
last_name: Ferstl
- first_name: Ryoichi
full_name: Ando, Ryoichi
last_name: Ando
- first_name: Christopher J
full_name: Wojtan, Christopher J
id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87
last_name: Wojtan
orcid: 0000-0001-6646-5546
- first_name: Rüdiger
full_name: Westermann, Rüdiger
last_name: Westermann
- first_name: Nils
full_name: Thuerey, Nils
last_name: Thuerey
citation:
ama: Ferstl F, Ando R, Wojtan C, Westermann R, Thuerey N. Narrow band FLIP for liquid
simulations. Computer Graphics Forum. 2016;35(2):225-232. doi:10.1111/cgf.12825
apa: Ferstl, F., Ando, R., Wojtan, C., Westermann, R., & Thuerey, N. (2016).
Narrow band FLIP for liquid simulations. Computer Graphics Forum. Wiley-Blackwell.
https://doi.org/10.1111/cgf.12825
chicago: Ferstl, Florian, Ryoichi Ando, Chris Wojtan, Rüdiger Westermann, and Nils
Thuerey. “Narrow Band FLIP for Liquid Simulations.” Computer Graphics Forum.
Wiley-Blackwell, 2016. https://doi.org/10.1111/cgf.12825.
ieee: F. Ferstl, R. Ando, C. Wojtan, R. Westermann, and N. Thuerey, “Narrow band
FLIP for liquid simulations,” Computer Graphics Forum, vol. 35, no. 2.
Wiley-Blackwell, pp. 225–232, 2016.
ista: Ferstl F, Ando R, Wojtan C, Westermann R, Thuerey N. 2016. Narrow band FLIP
for liquid simulations. Computer Graphics Forum. 35(2), 225–232.
mla: Ferstl, Florian, et al. “Narrow Band FLIP for Liquid Simulations.” Computer
Graphics Forum, vol. 35, no. 2, Wiley-Blackwell, 2016, pp. 225–32, doi:10.1111/cgf.12825.
short: F. Ferstl, R. Ando, C. Wojtan, R. Westermann, N. Thuerey, Computer Graphics
Forum 35 (2016) 225–232.
date_created: 2018-12-11T11:51:53Z
date_published: 2016-05-01T00:00:00Z
date_updated: 2025-09-18T14:25:04Z
day: '01'
ddc:
- '000'
department:
- _id: ChWo
doi: 10.1111/cgf.12825
external_id:
isi:
- '000377222200021'
file:
- access_level: open_access
checksum: 984afbe510ed48019025dff1dcc7baad
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:12:22Z
date_updated: 2020-07-14T12:44:53Z
file_id: '4940'
file_name: IST-2016-611-v1+3_CW_nbflip_postprint_2016.pdf
file_size: 5938324
relation: main_file
file_date_updated: 2020-07-14T12:44:53Z
has_accepted_license: '1'
intvolume: ' 35'
isi: 1
issue: '2'
language:
- iso: eng
month: '05'
oa: 1
oa_version: Submitted Version
page: 225 - 232
publication: Computer Graphics Forum
publication_status: published
publisher: Wiley-Blackwell
publist_id: '5793'
pubrep_id: '611'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Narrow band FLIP for liquid simulations
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 35
year: '2016'
...
---
_id: '1136'
abstract:
- lang: eng
text: We propose an interactive sculpting system for seamlessly editing pre-computed
animations of liquid, without the need for any resimulation. The input is a sequence
of meshes without correspondences representing the liquid surface over time. Our
method enables the efficient selection of consistent space-time parts of this
animation, such as moving waves or droplets, which we call space-time features.
Once selected, a feature can be copied, edited, or duplicated and then pasted
back anywhere in space and time in the same or in another liquid animation sequence.
Our method circumvents tedious user interactions by automatically computing the
spatial and temporal ranges of the selected feature. We also provide space-time
shape editing tools for non-uniform scaling, rotation, trajectory changes, and
temporal editing to locally speed up or slow down motion. Using our tools, the
user can edit and progressively refine any input simulation result, possibly using
a library of precomputed space-time features extracted from other animations.
In contrast to the trial-and-error loop usually required to edit animation results
through the tuning of indirect simulation parameters, our method gives the user
full control over the edited space-time behaviors. © 2016 Copyright held by the
owner/author(s).
acknowledgement: This work was partly supported by the starting grant BigSplash, as
well as the advanced grant EXPRESSIVE from the European Research Council (ERC-2014-StG
638176 , and ERC-2011-ADG 20110209).
article_number: '2994261'
article_processing_charge: No
author:
- first_name: Pierre
full_name: Manteaux, Pierre
last_name: Manteaux
- first_name: Ulysse
full_name: Vimont, Ulysse
last_name: Vimont
- first_name: Christopher J
full_name: Wojtan, Christopher J
id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87
last_name: Wojtan
orcid: 0000-0001-6646-5546
- first_name: Damien
full_name: Rohmer, Damien
last_name: Rohmer
- first_name: Marie
full_name: Cani, Marie
last_name: Cani
citation:
ama: 'Manteaux P, Vimont U, Wojtan C, Rohmer D, Cani M. Space-time sculpting of
liquid animation. In: Proceedings of the 9th International Conference on Motion
in Games . ACM; 2016. doi:10.1145/2994258.2994261'
apa: 'Manteaux, P., Vimont, U., Wojtan, C., Rohmer, D., & Cani, M. (2016). Space-time
sculpting of liquid animation. In Proceedings of the 9th International Conference
on Motion in Games . San Francisco, CA, USA: ACM. https://doi.org/10.1145/2994258.2994261'
chicago: Manteaux, Pierre, Ulysse Vimont, Chris Wojtan, Damien Rohmer, and Marie
Cani. “Space-Time Sculpting of Liquid Animation.” In Proceedings of the 9th
International Conference on Motion in Games . ACM, 2016. https://doi.org/10.1145/2994258.2994261.
ieee: P. Manteaux, U. Vimont, C. Wojtan, D. Rohmer, and M. Cani, “Space-time sculpting
of liquid animation,” in Proceedings of the 9th International Conference on
Motion in Games , San Francisco, CA, USA, 2016.
ista: 'Manteaux P, Vimont U, Wojtan C, Rohmer D, Cani M. 2016. Space-time sculpting
of liquid animation. Proceedings of the 9th International Conference on Motion
in Games . MIG: Motion in Games, 2994261.'
mla: Manteaux, Pierre, et al. “Space-Time Sculpting of Liquid Animation.” Proceedings
of the 9th International Conference on Motion in Games , 2994261, ACM, 2016,
doi:10.1145/2994258.2994261.
short: P. Manteaux, U. Vimont, C. Wojtan, D. Rohmer, M. Cani, in:, Proceedings of
the 9th International Conference on Motion in Games , ACM, 2016.
conference:
end_date: 2016-10-12
location: San Francisco, CA, USA
name: 'MIG: Motion in Games'
start_date: 2016-10-10
date_created: 2018-12-11T11:50:20Z
date_published: 2016-10-10T00:00:00Z
date_updated: 2024-10-22T09:58:18Z
day: '10'
ddc:
- '004'
department:
- _id: ChWo
doi: 10.1145/2994258.2994261
ec_funded: 1
has_accepted_license: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://hal.inria.fr/hal-01367181
month: '10'
oa: 1
oa_version: Submitted Version
project:
- _id: 2533E772-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '638176'
name: 'Big Splash: Efficient Simulation of Natural Phenomena at Extremely Large
Scales'
publication: 'Proceedings of the 9th International Conference on Motion in Games '
publication_status: published
publisher: ACM
publist_id: '6222'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Space-time sculpting of liquid animation
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2016'
...
---
_id: '1141'
abstract:
- lang: eng
text: In this paper we introduce the Multiobjective Optimization Hierarchic Genetic
Strategy with maturing (MO-mHGS), a meta-algorithm that performs evolutionary
optimization in a hierarchy of populations. The maturing mechanism improves growth
and reduces redundancy. The performance of MO-mHGS with selected state-of-the-art
multiobjective evolutionary algorithms as internal algorithms is analysed on benchmark
problems and their modifications for which single fitness evaluation time depends
on the solution accuracy. We compare the proposed algorithm with the Island Model
Genetic Algorithm as well as with single-deme methods, and discuss the impact
of internal algorithms on the MO-mHGS meta-algorithm. © 2016 Elsevier B.V.
acknowledgement: The work presented in this paper was partially supported by Polish
National Science Centre grant nos. DEC-2012/05/N/ST6/03433 and DEC-2011/03/B/ST6/01393.
Radosław Łazarz was supported by Polish National Science Centre grant no. DEC-2013/10/M/ST6/00531.
article_processing_charge: No
author:
- first_name: Radosław
full_name: Łazarz, Radosław
last_name: Łazarz
- first_name: Michał
full_name: Idzik, Michał
last_name: Idzik
- first_name: Konrad
full_name: Gądek, Konrad
last_name: Gądek
- first_name: Ewa P
full_name: Gajda-Zagorska, Ewa P
id: 47794CF0-F248-11E8-B48F-1D18A9856A87
last_name: Gajda-Zagorska
citation:
ama: Łazarz R, Idzik M, Gądek K, Gajda-Zagorska EP. Hierarchic genetic strategy
with maturing as a generic tool for multiobjective optimization. Journal of
Computational Science. 2016;17(1):249-260. doi:10.1016/j.jocs.2016.03.004
apa: Łazarz, R., Idzik, M., Gądek, K., & Gajda-Zagorska, E. P. (2016). Hierarchic
genetic strategy with maturing as a generic tool for multiobjective optimization.
Journal of Computational Science. Elsevier. https://doi.org/10.1016/j.jocs.2016.03.004
chicago: Łazarz, Radosław, Michał Idzik, Konrad Gądek, and Ewa P Gajda-Zagorska.
“Hierarchic Genetic Strategy with Maturing as a Generic Tool for Multiobjective
Optimization.” Journal of Computational Science. Elsevier, 2016. https://doi.org/10.1016/j.jocs.2016.03.004.
ieee: R. Łazarz, M. Idzik, K. Gądek, and E. P. Gajda-Zagorska, “Hierarchic genetic
strategy with maturing as a generic tool for multiobjective optimization,” Journal
of Computational Science, vol. 17, no. 1. Elsevier, pp. 249–260, 2016.
ista: Łazarz R, Idzik M, Gądek K, Gajda-Zagorska EP. 2016. Hierarchic genetic strategy
with maturing as a generic tool for multiobjective optimization. Journal of Computational
Science. 17(1), 249–260.
mla: Łazarz, Radosław, et al. “Hierarchic Genetic Strategy with Maturing as a Generic
Tool for Multiobjective Optimization.” Journal of Computational Science,
vol. 17, no. 1, Elsevier, 2016, pp. 249–60, doi:10.1016/j.jocs.2016.03.004.
short: R. Łazarz, M. Idzik, K. Gądek, E.P. Gajda-Zagorska, Journal of Computational
Science 17 (2016) 249–260.
date_created: 2018-12-11T11:50:22Z
date_published: 2016-11-01T00:00:00Z
date_updated: 2025-09-22T14:11:23Z
day: '01'
department:
- _id: ChWo
doi: 10.1016/j.jocs.2016.03.004
external_id:
isi:
- '000390625600021'
intvolume: ' 17'
isi: 1
issue: '1'
language:
- iso: eng
month: '11'
oa_version: None
page: 249 - 260
publication: Journal of Computational Science
publication_status: published
publisher: Elsevier
publist_id: '6217'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Hierarchic genetic strategy with maturing as a generic tool for multiobjective
optimization
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 17
year: '2016'
...
---
_id: '1362'
abstract:
- lang: eng
text: We present a boundary element based method for fast simulation of brittle
fracture. By introducing simplifying assumptions that allow us to quickly estimate
stress intensities and opening displacements during crack propagation, we build
a fracture algorithm where the cost of each time step scales linearly with the
length of the crackfront. The transition from a full boundary element method to
our faster variant is possible at the beginning of any time step. This allows
us to build a hybrid method, which uses the expensive but more accurate BEM while
the number of degrees of freedom is low, and uses the fast method once that number
exceeds a given threshold as the crack geometry becomes more complicated. Furthermore,
we integrate this fracture simulation with a standard rigid-body solver. Our rigid-body
coupling solves a Neumann boundary value problem by carefully separating translational,
rotational and deformational components of the collision forces and then applying
a Tikhonov regularizer to the resulting linear system. We show that our method
produces physically reasonable results in standard test cases and is capable of
dealing with complex scenes faster than previous finite- or boundary element approaches.
alternative_title:
- ACM Transactions on Graphics
article_number: '104'
article_processing_charge: No
author:
- first_name: David
full_name: Hahn, David
id: 357A6A66-F248-11E8-B48F-1D18A9856A87
last_name: Hahn
- first_name: Christopher J
full_name: Wojtan, Christopher J
id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87
last_name: Wojtan
orcid: 0000-0001-6646-5546
citation:
ama: 'Hahn D, Wojtan C. Fast approximations for boundary element based brittle fracture
simulation. In: Vol 35. ACM; 2016. doi:10.1145/2897824.2925902'
apa: 'Hahn, D., & Wojtan, C. (2016). Fast approximations for boundary element
based brittle fracture simulation (Vol. 35). Presented at the ACM SIGGRAPH, Anaheim,
CA, USA: ACM. https://doi.org/10.1145/2897824.2925902'
chicago: Hahn, David, and Chris Wojtan. “Fast Approximations for Boundary Element
Based Brittle Fracture Simulation,” Vol. 35. ACM, 2016. https://doi.org/10.1145/2897824.2925902.
ieee: D. Hahn and C. Wojtan, “Fast approximations for boundary element based brittle
fracture simulation,” presented at the ACM SIGGRAPH, Anaheim, CA, USA, 2016, vol.
35, no. 4.
ista: Hahn D, Wojtan C. 2016. Fast approximations for boundary element based brittle
fracture simulation. ACM SIGGRAPH, ACM Transactions on Graphics, vol. 35, 104.
mla: Hahn, David, and Chris Wojtan. Fast Approximations for Boundary Element
Based Brittle Fracture Simulation. Vol. 35, no. 4, 104, ACM, 2016, doi:10.1145/2897824.2925902.
short: D. Hahn, C. Wojtan, in:, ACM, 2016.
conference:
end_date: 2016-07-28
location: Anaheim, CA, USA
name: ACM SIGGRAPH
start_date: 2016-07-24
corr_author: '1'
date_created: 2018-12-11T11:51:35Z
date_published: 2016-07-01T00:00:00Z
date_updated: 2026-04-08T14:20:15Z
day: '01'
ddc:
- '000'
department:
- _id: ChWo
doi: 10.1145/2897824.2925902
ec_funded: 1
external_id:
isi:
- '000380112400074'
file:
- access_level: open_access
checksum: 943712d9c9dc8bb5048d4adc561d7d38
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:15:04Z
date_updated: 2020-07-14T12:44:46Z
file_id: '5121'
file_name: IST-2016-632-v1+2_a104-hahn.pdf
file_size: 12453704
relation: main_file
file_date_updated: 2020-07-14T12:44:46Z
has_accepted_license: '1'
intvolume: ' 35'
isi: 1
issue: '4'
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
project:
- _id: 2533E772-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '638176'
name: 'Big Splash: Efficient Simulation of Natural Phenomena at Extremely Large
Scales'
publication_status: published
publisher: ACM
publist_id: '5880'
pubrep_id: '632'
quality_controlled: '1'
related_material:
record:
- id: '839'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Fast approximations for boundary element based brittle fracture simulation
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: conference
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 35
year: '2016'
...
---
OA_place: publisher
_id: '1122'
abstract:
- lang: eng
text: "Computer graphics is an extremely exciting field for two reasons. On the
one hand,\r\nthere is a healthy injection of pragmatism coming from the visual
effects industry\r\nthat want robust algorithms that work so they can produce
results at an increasingly\r\nfrantic pace. On the other hand, they must always
try to push the envelope and\r\nachieve the impossible to wow their audiences
in the next blockbuster, which means\r\nthat the industry has not succumb to conservatism,
and there is plenty of room to\r\ntry out new and crazy ideas if there is a chance
that it will pan into something\r\nuseful.\r\nWater simulation has been in visual
effects for decades, however it still remains\r\nextremely challenging because
of its high computational cost and difficult artdirectability.\r\nThe work in
this thesis tries to address some of these difficulties.\r\nSpecifically, we make
the following three novel contributions to the state-of-the-art\r\nin water simulation
for visual effects.\r\nFirst, we develop the first algorithm that can convert
any sequence of closed\r\nsurfaces in time into a moving triangle mesh. State-of-the-art
methods at the time\r\ncould only handle surfaces with fixed connectivity, but
we are the first to be able to\r\nhandle surfaces that merge and split apart.
This is important for water simulation\r\npractitioners, because it allows them
to convert splashy water surfaces extracted\r\nfrom particles or simulated using
grid-based level sets into triangle meshes that can\r\nbe either textured and
enhanced with extra surface dynamics as a post-process.\r\nWe also apply our algorithm
to other phenomena that merge and split apart, such\r\nas morphs and noisy reconstructions
of human performances.\r\nSecond, we formulate a surface-based energy that measures
the deviation of a\r\nwater surface froma physically valid state. Such discrepancies
arise when there is a\r\nmismatch in the degrees of freedom between the water
surface and the underlying\r\nphysics solver. This commonly happens when practitioners
use a moving triangle\r\nmesh with a grid-based physics solver, or when high-resolution
grid-based surfaces\r\nare combined with low-resolution physics. Following the
direction of steepest\r\ndescent on our surface-based energy, we can either smooth
these artifacts or turn\r\nthem into high-resolution waves by interpreting the
energy as a physical potential.\r\nThird, we extend state-of-the-art techniques
in non-reflecting boundaries to handle spatially and time-varying background flows.
This allows a novel new\r\nworkflow where practitioners can re-simulate part of
an existing simulation, such\r\nas removing a solid obstacle, adding a new splash
or locally changing the resolution.\r\nSuch changes can easily lead to new waves
in the re-simulated region that would\r\nreflect off of the new simulation boundary,
effectively ruining the illusion of a\r\nseamless simulation boundary between
the existing and new simulations. Our\r\nnon-reflecting boundaries makes sure
that such waves are absorbed."
acknowledgement: "First and foremost I would like to thank Chris. I have been incredibly
lucky to have\r\nyou as my advisor. Your integrity and aspiration to do the right
thing in all walks of\r\nlife is something I admire and aspire to. I also really
appreciate the fact that when\r\nworking with you it felt like we were equals. I
think we had a very synergetic work\r\nrelationship: I learned immensely from you,
but I dare say that you learned a few\r\nthings from me as well. ;)\r\nNext, I would
like to thank my amazing committee. Hao, it was a fantastic\r\nexperience working
with you. You showed me how to persevere and keep morale\r\nhigh when things were
looking the most bleak before the deadline. You are an\r\nincredible motivator and
super fun to be around! Vladimir, thanks for the shared\r\nlunches and the poker
games. Sorry for not bringing them back when I got busy.\r\nAlso, sorry for embarrassing
you by asking about your guitar playing that one\r\ntime. You really are quite awesome!
Nils, one of the friendliest and most humble\r\npeople you will meet and a top notch
researcher to boot! Thank you for joining\r\nmy committee late!\r\nI would also
like to acknowledge the Visual Computing group at IST Austria\r\nfrom whom I have
learned so much. The excellent discussions we had in reading\r\ngroups and research
meetings really helped me become a better researcher!\r\nNext, I would like to thank
all the amazing people that I met during my PhD\r\nstudies, both at IST Austria,
in Vienna and elsewhere. "
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Morten
full_name: Bojsen-Hansen, Morten
id: 439F0C8C-F248-11E8-B48F-1D18A9856A87
last_name: Bojsen-Hansen
orcid: 0000-0002-4417-3224
citation:
ama: Bojsen-Hansen M. Tracking, correcting and absorbing water surface waves. 2016.
doi:10.15479/AT:ISTA:th_640
apa: Bojsen-Hansen, M. (2016). Tracking, correcting and absorbing water surface
waves. Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:th_640
chicago: Bojsen-Hansen, Morten. “Tracking, Correcting and Absorbing Water Surface
Waves.” Institute of Science and Technology Austria, 2016. https://doi.org/10.15479/AT:ISTA:th_640.
ieee: M. Bojsen-Hansen, “Tracking, correcting and absorbing water surface waves,”
Institute of Science and Technology Austria, 2016.
ista: Bojsen-Hansen M. 2016. Tracking, correcting and absorbing water surface waves.
Institute of Science and Technology Austria.
mla: Bojsen-Hansen, Morten. Tracking, Correcting and Absorbing Water Surface
Waves. Institute of Science and Technology Austria, 2016, doi:10.15479/AT:ISTA:th_640.
short: M. Bojsen-Hansen, Tracking, Correcting and Absorbing Water Surface Waves,
Institute of Science and Technology Austria, 2016.
corr_author: '1'
date_created: 2018-12-11T11:50:16Z
date_published: 2016-07-15T00:00:00Z
date_updated: 2026-04-08T14:24:06Z
day: '15'
ddc:
- '004'
- '005'
- '006'
- '532'
- '621'
degree_awarded: PhD
department:
- _id: ChWo
doi: 10.15479/AT:ISTA:th_640
file:
- access_level: open_access
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:13:02Z
date_updated: 2018-12-12T10:13:02Z
file_id: '4982'
file_name: IST-2016-640-v1+1_2016_Bojsen-Hansen_TCaAWSW.pdf
file_size: 13869345
relation: main_file
file_date_updated: 2018-12-12T10:13:02Z
has_accepted_license: '1'
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
page: '114'
publication_identifier:
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
publist_id: '6238'
related_material:
record:
- id: '5558'
relation: other
status: public
status: public
supervisor:
- first_name: Christopher J
full_name: Wojtan, Christopher J
id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87
last_name: Wojtan
orcid: 0000-0001-6646-5546
title: Tracking, correcting and absorbing water surface waves
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: dissertation
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
year: '2016'
...