---
_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: 2024-02-21T13:48:02Z
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
license: https://creativecommons.org/licenses/by-sa/4.0/
month: '08'
oa: 1
oa_version: Published Version
project:
- _id: 2533E772-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '638176'
name: 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: '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: 2023-02-21T09:49:49Z
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: 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.
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: 2021-01-12T06:48:35Z
day: '01'
department:
- _id: ChWo
doi: 10.1016/j.jocs.2016.03.004
intvolume: ' 17'
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: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 17
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'
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
date_created: 2018-12-11T11:51:35Z
date_published: 2016-07-11T00:00:00Z
date_updated: 2023-02-21T10:36:12Z
day: '11'
ddc:
- '000'
department:
- _id: ChWo
doi: 10.1145/2897824.2925963
ec_funded: 1
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'
issue: '4'
language:
- iso: eng
license: https://creativecommons.org/licenses/by/4.0/
month: '07'
oa: 1
oa_version: Published Version
project:
- _id: 2533E772-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '638176'
name: Efficient Simulation of Natural Phenomena at Extremely Large Scales
publication_status: published
publisher: ACM
publist_id: '5879'
pubrep_id: '631'
quality_controlled: '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: 4435EBFC-F248-11E8-B48F-1D18A9856A87
volume: 35
year: '2016'
...
---
_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
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: 2023-02-21T10:36:07Z
day: '11'
ddc:
- '000'
department:
- _id: ChWo
doi: 10.1145/2897824.2925899
ec_funded: 1
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'
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: 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: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
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. '
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: 2023-02-21T10:38:30Z
day: '27'
ddc:
- '000'
department:
- _id: ChWo
doi: 10.1111/cgf.12826
ec_funded: 1
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'
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: 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: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
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.
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.
date_created: 2018-12-11T11:51:53Z
date_published: 2016-05-01T00:00:00Z
date_updated: 2021-01-12T06:50:34Z
day: '01'
department:
- _id: ChWo
doi: 10.1111/cgf.12812
intvolume: ' 35'
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: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
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.
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: 2023-02-21T10:38:38Z
day: '01'
ddc:
- '000'
department:
- _id: ChWo
doi: 10.1111/cgf.12825
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'
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: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 35
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'
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
date_created: 2018-12-11T11:51:35Z
date_published: 2016-07-01T00:00:00Z
date_updated: 2023-09-07T12:02:56Z
day: '01'
ddc:
- '000'
department:
- _id: ChWo
doi: 10.1145/2897824.2925902
ec_funded: 1
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'
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: 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
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: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 35
year: '2016'
...
---
_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.
date_created: 2018-12-11T11:50:16Z
date_published: 2016-07-15T00:00:00Z
date_updated: 2024-02-21T13:50:48Z
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: c635000d-4b10-11ee-a964-aac5a93f6ac1
year: '2016'
...