Ideas

  • lerp: (bad animation)
  • polar decomposition and separately interpolate
    • is always positive definite but is not necessarily a rotation!
      • Can be hack around by decompose into and throw away

Applications

One usage of interpolating linear transformations is “linear blend skinning”, where poorly interpolated linear transformation can result in “candy wrapper artifact:”

Candy-wrapper-artefact-caused-by-Linear-Blend-Skinning.png