Findings of reviewing old code from 2017

general ideas

should we state that we picked our collision detection algorithm from stackoverflow?

Ideas from old code Collison

• collision groups
• collsion handling via events (blocks)
• the idea of a margin zone around a morph and the "touching" of morphs when the morphs do not intersect but are in each others margin zone.

similar things to our collision code

• different collision shapes via inheritance

Collision questions

• why all this contains methods which should check something like whether a shape completly lies inside another shape
• what is a PasteUpMorph
• Is it possible that a collision morph loses all its handles when it is an obstacle and then is declared as not an obstacle?