Adding Dynamics to Sketch-based Character Animations

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Reference

Martin Guay, Rémi Ronfard, Michael Gleicher, and Marie-Paule Cani: Adding Dynamics to Sketch-based Character Animations. In: Computational Aesthetics 2015 SBIM'15, 27-34.

DOI

http://dx.doi.org/10.2312/exp.20151176

Abstract

Cartoonists and animators often use lines of action to emphasize dynamics in character poses. In this paper, we propose a physically-based model to simulate the line of action's motion, leading to rich motion from simple drawings. Our proposed method is decomposed into three steps. Based on user-provided strokes, we forward simulate 2D elastic motion. To ensure continuity across keyframes, we re-target the forward simulations to the drawn strokes. Finally, we synthesize a 3D character motion matching the dynamic line. The fact that the line can move freely like an elastic band raises new questions about its relationship to the body over time. The line may move faster and leave body parts behind, or the line may slide slowly towards other body parts for support. We conjecture that the artist seeks to maximize the filling of the line (with the character's body)---while respecting basic realism constraints such as balance. Based on these insights, we provide a method that synthesizes 3D character motion, given discontinuously constrained body parts that are specified by the user at key moments.

Extended Abstract

Bibtex

@inproceedings{Guay:2015:ADS:2810210.2810213,
author = {Guay, Martin and Ronfard, R{\'e}mi and Gleicher, Michael and Cani, Marie-Paule},
title = {Adding Dynamics to Sketch-based Character Animations},
booktitle = {Proceedings of the Workshop on Sketch-Based Interfaces and Modeling},
series = {SBIM '15},
year = {2015},
location = {Istanbul, Turkey},
pages = {27--34},
numpages = {8},
url = {http://dl.acm.org/citation.cfm?id=2810210.2810213},
url = {http://de.evo-art.org/index.php?title=Adding_Dynamics_to_Sketch-based_Character_Animations},
acmid = {2810213},
publisher = {Eurographics Association},
address = {Aire-la-Ville, Switzerland, Switzerland},
} 

Used References

1 {Bla94} Blair P.: Cartoon Animation. Walter Foster, 1994. 3, 5, 6

2 M. G. Choi , K. Yang , T. Igarashi , J. Mitani , J. Lee, Retrieval and Visualization of Human Motion Data via Stick Figures, Computer Graphics Forum, v.31 n.7pt1, p.2057-2065, September 2012 http://dl.acm.org/citation.cfm?id=2399359&CFID=724111209&CFTOKEN=48939661 http://dx.doi.org/10.1111/j.1467-8659.2012.03198.x

3 James Davis , Maneesh Agrawala , Erika Chuang , Zoran Popović , David Salesin, A sketching interface for articulated figure animation, Proceedings of the 2003 ACM SIGGRAPH/Eurographics symposium on Computer animation, July 26-27, 2003, San Diego, California http://dl.acm.org/citation.cfm?id=846322&CFID=724111209&CFTOKEN=48939661

4 Martin Guay , Marie-Paule Cani , Rémi Ronfard, The line of action: an intuitive interface for expressive character posing, ACM Transactions on Graphics (TOG), v.32 n.6, November 2013 http://dl.acm.org/citation.cfm?id=2508397&CFID=724111209&CFTOKEN=48939661 http://dx.doi.org/10.1145/2508363.2508397

5 Martin Guay , Rémi Ronfard , Michael Gleicher , Marie-Paule Cani, Space-time sketching of character animation, ACM Transactions on Graphics (TOG), v.34 n.4, August 2015 http://dl.acm.org/citation.cfm?id=2766893&CFID=724111209&CFTOKEN=48939661 http://dx.doi.org/10.1145/2766893

6 Jessica K. Hodgins , Wayne L. Wooten , David C. Brogan , James F. O'Brien, Animating human athletics, Proceedings of the 22nd annual conference on Computer graphics and interactive techniques, p.71-78, September 1995 http://dl.acm.org/citation.cfm?id=218414&CFID=724111209&CFTOKEN=48939661 http://dx.doi.org/10.1145/218380.218414

7 Youngihn Kho , Michael Garland, Sketching mesh deformations, Proceedings of the 2005 symposium on Interactive 3D graphics and games, April 03-06, 2005, Washington, District of Columbia http://dl.acm.org/citation.cfm?id=1053452&CFID=724111209&CFTOKEN=48939661 http://dx.doi.org/10.1145/1053427.1053452

8 John Lasseter, Principles of traditional animation applied to 3D computer animation, ACM SIGGRAPH Computer Graphics, v.21 n.4, p.35-44, July 1987 http://dl.acm.org/citation.cfm?id=37407&CFID=724111209&CFTOKEN=48939661 http://dx.doi.org/10.1145/37402.37407

9 Juncong Lin , Takeo Igarashi , Jun Mitani , Greg Saul, A sketching interface for sitting-pose design, Proceedings of the Seventh Sketch-Based Interfaces and Modeling Symposium, June 07-10, 2010, Annecy, France http://dl.acm.org/citation.cfm?id=1923383&CFID=724111209&CFTOKEN=48939661

10 Michael Neff , Eugene Fiume, Aesthetic edits for character animation, Proceedings of the 2003 ACM SIGGRAPH/Eurographics symposium on Computer animation, July 26-27, 2003, San Diego, California http://dl.acm.org/citation.cfm?id=846310&CFID=724111209&CFTOKEN=48939661

11 A. Cengiz Öztireli , Ilya Baran , Tiberiu Popa , Boris Dalstein , Robert W. Sumner , Markus Gross, Differential blending for expressive sketch-based posing, Proceedings of the 12th ACM SIGGRAPH/Eurographics Symposium on Computer Animation, July 19-21, 2013, Anaheim, California http://dl.acm.org/citation.cfm?id=2485916&CFID=724111209&CFTOKEN=48939661 http://dx.doi.org/10.1145/2485895.2485916

12 Thomas W. Sederberg , Eugene Greenwood, A physically based approach to 2–D shape blending, ACM SIGGRAPH Computer Graphics, v.26 n.2, p.25-34, July 1992 http://dl.acm.org/citation.cfm?id=134001&CFID=724111209&CFTOKEN=48939661 http://dx.doi.org/10.1145/142920.134001

13 Camillo J. Taylor, Reconstruction of Articulated Objects from Point Correspondences in a Single Uncalibrated Image, Computer Vision and Image Understanding, v.80 n.3, p.349-363, Dec. 2000 http://dl.acm.org/citation.cfm?id=364079&CFID=724111209&CFTOKEN=48939661 http://dx.doi.org/10.1006/cviu.2000.0878

14 Demetri Terzopoulos , John Platt , Alan Barr , Kurt Fleischer, Elastically deformable models, ACM SIGGRAPH Computer Graphics, v.21 n.4, p.205-214, July 1987 http://dl.acm.org/citation.cfm?id=37427&CFID=724111209&CFTOKEN=48939661 http://dx.doi.org/10.1145/37402.37427

15 Xiaolin Wei , Jinxiang Chai, Intuitive Interactive Human-Character Posing with Millions of Example Poses, IEEE Computer Graphics and Applications, v.31 n.4, p.78-88, July 2011 http://dl.acm.org/citation.cfm?id=2006841&CFID=724111209&CFTOKEN=48939661 http://dx.doi.org/10.1109/MCG.2009.132


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