Functional Pre-Image/Folding coloring

[sfogarty]

• Use grid and apply to compute the pre-images of each square
• Color each square based on # of pre-images (probably won't work)
• Color each square based on # of pre-images within epsilon - of eachother? of a point? (probably latter)

[sfogarty]

Two new options:

Using angles of pre-images to estimate folds

• Compute angles of pre-images
• Merge sufficiently close angles
• Count # of remaining angles

Using changes in orientation to estimate fold (or fold parity)

• Take three points with known angle
• Compute their images, and that angle
• If the angle changed sign, color origin square one way or the other