---
_id: '13049'
abstract:
- lang: eng
text: "We propose a computational design approach for covering a surface with individually
addressable RGB LEDs, effectively forming a low-resolution surface screen. To
achieve a low-cost and scalable approach, we propose creating designs from flat
PCB panels bent in-place along the surface of a 3D printed core. Working with
standard rigid PCBs enables the use of\r\nestablished PCB manufacturing services,
allowing the fabrication of designs with several hundred LEDs. \r\nOur approach
optimizes the PCB geometry for folding, and then jointly optimizes the LED packing,
circuit and routing, solving a challenging layout problem under strict manufacturing
requirements. Unlike paper, PCBs cannot bend beyond a certain point without breaking.
Therefore, we introduce parametric cut patterns acting as hinges, designed to
allow bending while remaining compact. To tackle the joint optimization of placement,
circuit and routing, we propose a specialized algorithm that splits the global
problem into one sub-problem per triangle, which is then individually solved.\r\nOur
technique generates PCB blueprints in a completely automated way. After being
fabricated by a PCB manufacturing service, the boards are bent and glued by the
user onto the 3D printed support. We demonstrate our technique on a range of physical
models and virtual examples, creating intricate surface light patterns from hundreds
of LEDs."
acknowledged_ssus:
- _id: M-Shop
acknowledgement: We thank the reviewers for the valuable feedback. We also thank the
Miba Machine Shop at ISTA, PCBWay, and PragoBoard for helping us with fabrication
and assembly. This project was supported by the European Research Council (ERC)
under the European Union’s Horizon 2020 research and innovation program (Grant Agreement
No. 715767 – MATERIALIZABLE).
article_number: '142'
article_processing_charge: No
article_type: original
author:
- first_name: Marco
full_name: Freire, Marco
last_name: Freire
- first_name: Manas
full_name: Bhargava, Manas
id: FF8FA64C-AA6A-11E9-99AD-50D4E5697425
last_name: Bhargava
orcid: 0009-0007-6138-6890
- first_name: Camille
full_name: Schreck, Camille
id: 2B14B676-F248-11E8-B48F-1D18A9856A87
last_name: Schreck
- first_name: Pierre-Alexandre
full_name: Hugron, Pierre-Alexandre
last_name: Hugron
- first_name: Bernd
full_name: Bickel, Bernd
id: 49876194-F248-11E8-B48F-1D18A9856A87
last_name: Bickel
orcid: 0000-0001-6511-9385
- first_name: Sylvain
full_name: Lefebvre, Sylvain
last_name: Lefebvre
citation:
ama: 'Freire M, Bhargava M, Schreck C, Hugron P-A, Bickel B, Lefebvre S. PCBend:
Light up your 3D shapes with foldable circuit boards. Transactions on Graphics.
2023;42(4). doi:10.1145/3592411'
apa: 'Freire, M., Bhargava, M., Schreck, C., Hugron, P.-A., Bickel, B., & Lefebvre,
S. (2023). PCBend: Light up your 3D shapes with foldable circuit boards. Transactions
on Graphics. Los Angeles, CA, United States: Association for Computing Machinery.
https://doi.org/10.1145/3592411'
chicago: 'Freire, Marco, Manas Bhargava, Camille Schreck, Pierre-Alexandre Hugron,
Bernd Bickel, and Sylvain Lefebvre. “PCBend: Light up Your 3D Shapes with Foldable
Circuit Boards.” Transactions on Graphics. Association for Computing Machinery,
2023. https://doi.org/10.1145/3592411.'
ieee: 'M. Freire, M. Bhargava, C. Schreck, P.-A. Hugron, B. Bickel, and S. Lefebvre,
“PCBend: Light up your 3D shapes with foldable circuit boards,” Transactions
on Graphics, vol. 42, no. 4. Association for Computing Machinery, 2023.'
ista: 'Freire M, Bhargava M, Schreck C, Hugron P-A, Bickel B, Lefebvre S. 2023.
PCBend: Light up your 3D shapes with foldable circuit boards. Transactions on
Graphics. 42(4), 142.'
mla: 'Freire, Marco, et al. “PCBend: Light up Your 3D Shapes with Foldable Circuit
Boards.” Transactions on Graphics, vol. 42, no. 4, 142, Association for
Computing Machinery, 2023, doi:10.1145/3592411.'
short: M. Freire, M. Bhargava, C. Schreck, P.-A. Hugron, B. Bickel, S. Lefebvre,
Transactions on Graphics 42 (2023).
conference:
end_date: 2023-08-10
location: Los Angeles, CA, United States
name: 'SIGGRAPH: Computer Graphics and Interactive Techniques Conference'
start_date: 2023-08-06
date_created: 2023-05-22T08:37:04Z
date_published: 2023-07-26T00:00:00Z
date_updated: 2024-01-29T10:30:49Z
day: '26'
ddc:
- '006'
department:
- _id: GradSch
- _id: BeBi
doi: 10.1145/3592411
ec_funded: 1
external_id:
isi:
- '001044671300108'
file:
- access_level: open_access
checksum: a0b0ba3b36f43a94388e8824613d812a
content_type: application/pdf
creator: dernst
date_created: 2023-06-19T11:02:23Z
date_updated: 2023-06-19T11:02:23Z
file_id: '13156'
file_name: 2023_ACMToG_Freire.pdf
file_size: 78940724
relation: main_file
success: 1
- access_level: open_access
checksum: b9206bbb67af82df49b7e7cdbde3410c
content_type: application/pdf
creator: dernst
date_created: 2023-06-20T12:20:51Z
date_updated: 2023-06-20T12:20:51Z
file_id: '13157'
file_name: 2023_ACMToG_SuppMaterial_Freire.pdf
file_size: 34345905
relation: main_file
success: 1
file_date_updated: 2023-06-20T12:20:51Z
has_accepted_license: '1'
intvolume: ' 42'
isi: 1
issue: '4'
keyword:
- PCB design and layout
- Mesh geometry models
language:
- iso: eng
month: '07'
oa: 1
oa_version: Submitted Version
project:
- _id: 24F9549A-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '715767'
name: 'MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and
Modeling'
publication: Transactions on Graphics
publication_identifier:
eissn:
- 1557-7368
issn:
- 0730-0301
publication_status: published
publisher: Association for Computing Machinery
quality_controlled: '1'
status: public
title: 'PCBend: Light up your 3D shapes with foldable circuit boards'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 42
year: '2023'
...
---
_id: '11432'
abstract:
- lang: eng
text: "This paper proposes a method for simulating liquids in large bodies of water
by coupling together a water surface wave simulator with a 3D Navier-Stokes simulator.
The surface wave simulation uses the equivalent sources method (ESM) to efficiently
animate large bodies of water with precisely controllable wave propagation behavior.
The 3D liquid simulator animates complex non-linear fluid behaviors like splashes
and breaking waves using off-the-shelf simulators using FLIP or the level set
method with semi-Lagrangian advection.\r\nWe combine the two approaches by using
the 3D solver to animate localized non-linear behaviors, and the 2D wave solver
to animate larger regions with linear surface physics. We use the surface motion
from the 3D solver as boundary conditions for 2D surface wave simulator, and we
use the velocity and surface heights from the 2D surface wave simulator as boundary
conditions for the 3D fluid simulation. We also introduce a novel technique for
removing visual artifacts caused by numerical errors in 3D fluid solvers: we use
experimental data to estimate the artificial dispersion caused by the 3D solver
and we then carefully tune the wave speeds of the 2D solver to match it, effectively
eliminating any differences in wave behavior across the boundary. To the best
of our knowledge, this is the first time such a empirically driven error compensation
approach has been used to remove coupling errors from a physics simulator.\r\nOur
coupled simulation approach leverages the strengths of each simulation technique,
animating large environments with seamless transitions between 2D and 3D physics."
acknowledged_ssus:
- _id: ScienComp
acknowledgement: We wish to thank the anonymous reviewers and the members of the Visual
Computing Group at IST Austria and MFX Team at INRIA for their valuable feedback.
This research was supported by the Scientific Service Units (SSU) of IST Austria
through resources provided by Scientific Computing. This project has received funding
from the European Research Council (ERC) under the European Union’s Horizon 2020
research and innovation programme under grant agreement No. 638176.
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: Christopher J
full_name: Wojtan, Christopher J
id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87
last_name: Wojtan
orcid: 0000-0001-6646-5546
citation:
ama: Schreck C, Wojtan C. Coupling 3D liquid simulation with 2D wave propagation
for large scale water surface animation using the equivalent sources method. Computer
Graphics Forum. 2022;41(2):343-353. doi:10.1111/cgf.14478
apa: Schreck, C., & Wojtan, C. (2022). Coupling 3D liquid simulation with 2D
wave propagation for large scale water surface animation using the equivalent
sources method. Computer Graphics Forum. Wiley. https://doi.org/10.1111/cgf.14478
chicago: Schreck, Camille, and Chris Wojtan. “Coupling 3D Liquid Simulation with
2D Wave Propagation for Large Scale Water Surface Animation Using the Equivalent
Sources Method.” Computer Graphics Forum. Wiley, 2022. https://doi.org/10.1111/cgf.14478.
ieee: C. Schreck and C. Wojtan, “Coupling 3D liquid simulation with 2D wave propagation
for large scale water surface animation using the equivalent sources method,”
Computer Graphics Forum, vol. 41, no. 2. Wiley, pp. 343–353, 2022.
ista: Schreck C, Wojtan C. 2022. Coupling 3D liquid simulation with 2D wave propagation
for large scale water surface animation using the equivalent sources method. Computer
Graphics Forum. 41(2), 343–353.
mla: Schreck, Camille, and Chris Wojtan. “Coupling 3D Liquid Simulation with 2D
Wave Propagation for Large Scale Water Surface Animation Using the Equivalent
Sources Method.” Computer Graphics Forum, vol. 41, no. 2, Wiley, 2022,
pp. 343–53, doi:10.1111/cgf.14478.
short: C. Schreck, C. Wojtan, Computer Graphics Forum 41 (2022) 343–353.
date_created: 2022-06-05T22:01:49Z
date_published: 2022-05-01T00:00:00Z
date_updated: 2023-08-02T06:44:05Z
day: '01'
department:
- _id: ChWo
doi: 10.1111/cgf.14478
ec_funded: 1
external_id:
isi:
- '000802723900027'
intvolume: ' 41'
isi: 1
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://hal.archives-ouvertes.fr/hal-03641349/
month: '05'
oa: 1
oa_version: Submitted Version
page: 343-353
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_identifier:
eissn:
- 1467-8659
issn:
- 0167-7055
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: Coupling 3D liquid simulation with 2D wave propagation for large scale water
surface animation using the equivalent sources method
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 41
year: '2022'
...
---
_id: '8765'
abstract:
- lang: eng
text: This paper introduces a simple method for simulating highly anisotropic elastoplastic
material behaviors like the dissolution of fibrous phenomena (splintering wood,
shredding bales of hay) and materials composed of large numbers of irregularly‐shaped
bodies (piles of twigs, pencils, or cards). We introduce a simple transformation
of the anisotropic problem into an equivalent isotropic one, and we solve this
new “fictitious” isotropic problem using an existing simulator based on the material
point method. Our approach results in minimal changes to existing simulators,
and it allows us to re‐use popular isotropic plasticity models like the Drucker‐Prager
yield criterion instead of inventing new anisotropic plasticity models for every
phenomenon we wish to simulate.
acknowledged_ssus:
- _id: ScienComp
acknowledgement: "We wish to thank the anonymous reviewers and the members of the
Visual Computing Group at IST Austria for their valuable feedback. This research
was supported by the Scientific Service Units (SSU) of IST Austria through resources
provided by Scientific Computing. We would also like to thank Joseph Teran and Chenfanfu
Jiang for the helpful discussions.\r\nThis project has received funding from the
European Research Council (ERC) under the European Union's Horizon 2020 research
and innovation programme under grant agreement No. 638176."
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: Christopher J
full_name: Wojtan, Christopher J
id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87
last_name: Wojtan
orcid: 0000-0001-6646-5546
citation:
ama: Schreck C, Wojtan C. A practical method for animating anisotropic elastoplastic
materials. Computer Graphics Forum. 2020;39(2):89-99. doi:10.1111/cgf.13914
apa: Schreck, C., & Wojtan, C. (2020). A practical method for animating anisotropic
elastoplastic materials. Computer Graphics Forum. Wiley. https://doi.org/10.1111/cgf.13914
chicago: Schreck, Camille, and Chris Wojtan. “A Practical Method for Animating Anisotropic
Elastoplastic Materials.” Computer Graphics Forum. Wiley, 2020. https://doi.org/10.1111/cgf.13914.
ieee: C. Schreck and C. Wojtan, “A practical method for animating anisotropic elastoplastic
materials,” Computer Graphics Forum, vol. 39, no. 2. Wiley, pp. 89–99,
2020.
ista: Schreck C, Wojtan C. 2020. A practical method for animating anisotropic elastoplastic
materials. Computer Graphics Forum. 39(2), 89–99.
mla: Schreck, Camille, and Chris Wojtan. “A Practical Method for Animating Anisotropic
Elastoplastic Materials.” Computer Graphics Forum, vol. 39, no. 2, Wiley,
2020, pp. 89–99, doi:10.1111/cgf.13914.
short: C. Schreck, C. Wojtan, Computer Graphics Forum 39 (2020) 89–99.
date_created: 2020-11-17T09:35:10Z
date_published: 2020-05-01T00:00:00Z
date_updated: 2023-09-05T16:00:13Z
day: '01'
ddc:
- '000'
department:
- _id: ChWo
doi: 10.1111/cgf.13914
ec_funded: 1
external_id:
isi:
- '000548709600008'
file:
- access_level: open_access
checksum: 7605f605acd84d0942b48bc7a1c2d72e
content_type: application/pdf
creator: dernst
date_created: 2020-11-23T09:05:13Z
date_updated: 2020-11-23T09:05:13Z
file_id: '8796'
file_name: 2020_poff_revisited.pdf
file_size: 38969122
relation: main_file
success: 1
file_date_updated: 2020-11-23T09:05:13Z
has_accepted_license: '1'
intvolume: ' 39'
isi: 1
issue: '2'
keyword:
- Computer Networks and Communications
language:
- iso: eng
month: '05'
oa: 1
oa_version: Submitted Version
page: 89-99
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_identifier:
eissn:
- 1467-8659
issn:
- 0167-7055
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: A practical method for animating anisotropic elastoplastic materials
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 39
year: '2020'
...
---
_id: '6442'
abstract:
- lang: eng
text: This paper investigates the use of fundamental solutions for animating detailed
linear water surface waves. We first propose an analytical solution for efficiently
animating circular ripples in closed form. We then show how to adapt the method
of fundamental solutions (MFS) to create ambient waves interacting with complex
obstacles. Subsequently, we present a novel wavelet-based discretization which
outperforms the state of the art MFS approach for simulating time-varying water
surface waves with moving obstacles. Our results feature high-resolution spatial
details, interactions with complex boundaries, and large open ocean domains. Our
method compares favorably with previous work as well as known analytical solutions.
We also present comparisons between our method and real world examples.
acknowledged_ssus:
- _id: ScienComp
article_number: '130'
article_processing_charge: No
author:
- first_name: Camille
full_name: Schreck, Camille
id: 2B14B676-F248-11E8-B48F-1D18A9856A87
last_name: Schreck
- first_name: Christian
full_name: Hafner, Christian
id: 400429CC-F248-11E8-B48F-1D18A9856A87
last_name: Hafner
- 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: Schreck C, Hafner C, Wojtan C. Fundamental solutions for water wave animation.
ACM Transactions on Graphics. 2019;38(4). doi:10.1145/3306346.3323002
apa: Schreck, C., Hafner, C., & Wojtan, C. (2019). Fundamental solutions for
water wave animation. ACM Transactions on Graphics. ACM. https://doi.org/10.1145/3306346.3323002
chicago: Schreck, Camille, Christian Hafner, and Chris Wojtan. “Fundamental Solutions
for Water Wave Animation.” ACM Transactions on Graphics. ACM, 2019. https://doi.org/10.1145/3306346.3323002.
ieee: C. Schreck, C. Hafner, and C. Wojtan, “Fundamental solutions for water wave
animation,” ACM Transactions on Graphics, vol. 38, no. 4. ACM, 2019.
ista: Schreck C, Hafner C, Wojtan C. 2019. Fundamental solutions for water wave
animation. ACM Transactions on Graphics. 38(4), 130.
mla: Schreck, Camille, et al. “Fundamental Solutions for Water Wave Animation.”
ACM Transactions on Graphics, vol. 38, no. 4, 130, ACM, 2019, doi:10.1145/3306346.3323002.
short: C. Schreck, C. Hafner, C. Wojtan, ACM Transactions on Graphics 38 (2019).
date_created: 2019-05-14T07:04:06Z
date_published: 2019-07-01T00:00:00Z
date_updated: 2023-08-25T10:18:46Z
day: '01'
ddc:
- '000'
- '005'
department:
- _id: ChWo
doi: 10.1145/3306346.3323002
ec_funded: 1
external_id:
isi:
- '000475740600104'
file:
- access_level: open_access
checksum: 1b737dfe3e051aba8f3f4ab1dceda673
content_type: application/pdf
creator: dernst
date_created: 2019-05-14T07:03:55Z
date_updated: 2020-07-14T12:47:30Z
file_id: '6443'
file_name: 2019_ACM_Schreck.pdf
file_size: 44328918
relation: main_file
file_date_updated: 2020-07-14T12:47:30Z
has_accepted_license: '1'
intvolume: ' 38'
isi: 1
issue: '4'
language:
- iso: eng
month: '07'
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
- _id: 24F9549A-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '715767'
name: 'MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and
Modeling'
- _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
quality_controlled: '1'
related_material:
link:
- description: News on IST Homepage
relation: press_release
url: https://ist.ac.at/en/news/new-method-makes-realistic-water-wave-animations-more-efficient/
scopus_import: '1'
status: public
title: Fundamental solutions for water wave animation
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 38
year: '2019'
...
---
_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: 2021-01-12T08:08:37Z
day: '01'
ddc:
- '000'
department:
- _id: ChWo
doi: 10.1111/cgf.13110
intvolume: ' 36'
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: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 36
year: '2017'
...