Implicit skinning
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A summary of the SIGGRAPH paper, "Implicit Skinning Real-Time Skin Deformation with Contact Modeling."
Transcript of Implicit skinning
Implicit Skinning: Real-Time Skin Deformation with Contact Modeling
SIGGRAPH 2013
2013/11/26ked
Authors
Rodolphe Vaillant, Loic Barthe,
Gael Guennebaud, Marie-Paule Cani, Damien Rhomer
Brain Wyvill, Olivier Gourmel, Mathias Paulin
Authors
Rodolphe Vaillant, Loic Barthe,
Gael Guennebaud, Marie-Paule Cani, Damien Rhomer,
Brain Wyvill, Olivier Gourmel, Mathias Paulin
Skin deformation
Popular methods
FPS
Popular methods
Problem at a bone joint
Volume preserving
Others
Not fit to standard animation pipeline
Proposed method
Implicit skinning
Dual quaternions
Video
Idea
Implicit surface
Idea
Implicit surface “Surfaces with are contours (isosurfaces) through
some scalar field in 3D” – Paul Bourke
Explicit: Implicit:
Idea
Idea
How
Overview
Input Implicit surfaces
Tracking Composition
Input
Mesh & skeleton
Weights Partitions(user defined or automati
“Automatic Rigging and Animation of 3D Characters”
Implicit surface
Definition of this paper
Radial basis function: : scalars : vectors
Solve 4m unknown coefficients
Hermit Radial Basis Function
Hermit Radial Basis Function
Radial basis function: : scalars : vectors
Solve 4m unknown coefficients Linear combination of basis function
Re-parameterization
Additional sampling
Hermit Radial Basis Function
Radial basis function:
: scalars : vectors
Hermit Radial Basis Function
Radial basis function:
: scalars : vectors
Hermit Radial Basis Function
Radial basis function:
: scalars : vectors
Hermit Radial Basis Function
Radial basis function:
: scalars : vectors
Composition
Composition
Union Blending
Composition
Union
Blending
union
Composition
Union Blending
Union Blending(bulge in contact)
Composition
Union Blending
union blending
standard proposed
Gradient-based blending
Union
Blending
Gradient-based blending
Union
Blending
standard proposed
Gradient-based blending
Detail encoding
Displacement map
Surface tracking
Collision detection
Linear blend (self-intersection)
HRBF
Stop tracking when
Memory for scalar field
32 x 32 x 32 for HRBF 128 x 128 x 128 with trilinear interpolation
20 to 70 bones: 10Mb to 35 Mb
Results
Results
Animate a joint using proposed method
Thx.
