GPU를 이용한 3차원 캐릭터의 빠른 2차 피부 변형 계산
Computing Fast Secondary Skin Deformation of a 3D Character using GPU
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초록
본 논문에서는 GPU 의 정점 셰이더에서 각 정점별 질량-스프링 모의 실험을 수행하여, 매우 빠른 속도로 피부의 2차 변형을 표현하는 새로운 방법을 제안한다. 3 차원 캐릭터의 각 피부 정점에 대해, 길이가 0인 스프링으로 가상 정점을 연결하고, 캐릭터 동작에 따라서 피부 정점의위치 및 속도가 변화하면, 질량-스프링 모의 실험을 통해 렌더링될 가상 정점의위치를 GPU 의 정점 셰이더를 사용하여 병렬적으로 계산한다. 본 논문에서 제시하는 방법을 통해피부의재질 특성을 반영하는 2차 변형을 매우빠르게표현할수 있으며, 각피부 정점에 제안한방법을 동적으로적용하면 전통적인 2차원애E메이션에서 관찰되는 수축-팽창(squash-and-stretch), 추종(follow-through) 과같은 효과도매우빠른 연산 시간에 효과적으로표현할수 있다. 따라서 본논문의 결과는 게임과같은 실시간응용분야에서 가상 캐릭터의 피부 변형을 표현하는데 효과적으로사용될 수 있다.
Abstract
This paper presents a new method to represent the secondary deformation effect using simple mass-spring simulation on the vertex shader of the GPU. For each skin vertex of a 3D character, a zero-length spring is connected to a virtual vertex that is to be rendered. When a skin vertex changes its position and velocity according to the character motion, the position of the corresponding virtual vertex is computed by mass-spring simulation in parallel on the GPU. The proposed method represents the secondary deformation effect very fast that shows the material property of a character skin during the animation. Applying the proposed technique dynamically can represent squash-and-stretch and follow-through effects which have been frequently shown in the traditional 2D animation, within a very small amount of additional computation. The proposed method is applicable to represent elastic skin deformation of a virtual character in an interactive animation environment such as games
참고문헌 (21)
- S. M. Platt, "Animating facial expressions", Proceedings of the 8th annual conference on Computer graphics and interactive techniques, ser. SIGGRAPH ’81, pp.245~252 (1981), ACM
- K. Waters, "Modelling and animating faces using scanned data", The Journal of Visualization and Computer Animation, 2(4), pp.123~128 (1991)
- L. Nedel, "Real time muscle deformations using mass-spring systems", Computer Graphics International, 1998. Proceedings, pp.156~165 (1998)
- D. Terzopoulos, "Elastically deformable models", Proceedings of the14th annual conference on Computer graphics and interactivetechniques, ser. SIGGRAPH ’87, pp.205~214 (1987), ACM
- D. Baraff, "Large steps in cloth simulation", Proceedings of the 25th annual conference on Computer graphics and interactive techniques, ser. SIGGRAPH ’98, pp.43~54 (1998), ACM
- A. Selle, "A mass spring model for hair simulation", ACM SIGGRAPH 2008 papers, ser. SIGGRAPH ’08. New York, NY, USA, pp.64:1~64:11 (2008), ACM
- J. Georgii, "Interactive simulation of deformable bodies on gpus", pp.247~258 (2005), Simulation and Visualisation 2005
- W. von Funck, "Elastic secondary deformations by vector field integration", Proceedings of the fifth Eurographics symposium on Geometry processing. Aire-la-Ville, pp.99~108 (2007), Eurographics Association
- S. I. Park, "Data-driven modeling of skin and muscle deformation", SIGGRAPH ’08: ACM SIGGRAPH 2008 papers. New York, NY, USA, pp.1~6 (2008), ACM
- X. Shi, "Example-based dynamic skinning in real time", ACMSIGGRAPH 2008 papers, ser. SIGGRAPH ’08, pp.29:1~29:8 (2008), ACM
- M. M. Movania, "A novel gpu-based deformation pipeline", ISRN Computer Graphics, 2012, pp.8~ (2012)
- J. Lasseter, "Principles of traditional animation applied to 3D computer graphics", Proceedings of SIGGRAPH 87, pp.35~44 (1987)
- A. Opalach, "Disney effects using implicit surfaces", Proceedings of 5th Eurographics Workshop on Animation and Simulation (1994)
- S. Chenney, "Simulating cartoon style animation", Proceedings of Non- Photorealistic Animation and Rendering, pp.133~138 (2002)
- J.-J. Choi, "Anticipation for facial animation", Proceedings of 17th International Conference on Computer Animation and Social Agents, pp.1~8 (2004)
- J.-H. Kim, "Anticipation effect generation for character animation", Proceedings of Computer Graphics International 2006, ser. Lecture Note in Computer Science, 4035, pp.639~646 (2006)
- J. Wang, "The cartoon animation filter", ACM SIGGRAPH 2006 Papers, ser. SIGGRAPH ’06, pp.1169~1173 (2006), ACM
- D. White, "Slow in and slow out cartoon animation filter", ACM SIGGRAPH 2006 Research posters, ser. SIGGRAPH ’06 (2006), ACM
- K. Tateno, "Motion stylization using a timing control method", ACMSIGGRAPH 2006 Research posters, ser. SIGGRAPH ’06 (2006), ACM
- J.-y. Kwon, "Exaggerating character motions using sub-joint hierarchy", COMPUTER GRAPHICS FORUM, 27, pp.1677~1686 (2008), Blackwell Publishing Ltd.
- J. yong Kwon, "The Squash-and-Stretch Stylization for Character Motions", IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS, 18(3), pp.488~500 (2012), IEEE COMPUTER SOC