Deformation

Qixing Huang

March. 9th 2017

Slide Credit: Mirela Ben-Chen and Mario Botsch

Deformation

Motivation

Easy modeling – generate new shapes by deforming existing ones

Motivation

Easy modeling – generate new shapes by deforming existing ones

Motivation

Character posing for animation

Challenges

User says as little as possible, and algorithm deduces the rest

Challenges

“Intuitive deformation”global change + local detail preservation

Challenges

“Intuitive deformation”global change + local detail preservation

Challenges

Efficient!

Problem Statement

Shape

Constraints

Deformed shapeAlgorithm

Position

Orientation/Scale

Other shape property

Freeform Deformation

• Deform objectʼs bounding box

– Implicitly deforms embedded objects

Freeform Deformation

• Deform objectʼs bounding box

– Implicitly deforms embedded objects

• Tri-variate tensor-product spline

Freeform Deformation

• Deform objectʼs bounding box

– Implicitly deforms embedded objects

• Tri-variate tensor-product spline

Freeform Deformation

• Deform objectʼs bounding box

– Implicitly deforms embedded objects

• Tri-variate tensor-product spline

– Aliasing artifacts

• Interpolate deformation constraints?

– Only in least squares sense