Adjust CPU `isTouchingColor` to match GPU results (again)#419

Merged

cwillisf merged 9 commits intoscratchfoundation:developfrom

cwillisf:coordinates-fixups-2

Apr 10, 2019

Commits on Mar 20, 2019

Adjust CPU isTouchingColor to match GPU results
Christopher Willis-Ford
committed
Fix direction for Y iteration on CPU path
Christopher Willis-Ford
committed
Fix (x,y) => point[] conversion comments
Christopher Willis-Ford
committed
Use alpha test to avoid false touching-color
Christopher Willis-Ford
committed
Iterate drawables in the same order on CPU & GPU
Christopher Willis-Ford
committed
Fix exception on first button click
Christopher Willis-Ford
committed
Add touching-color test to verify stencil use
Christopher Willis-Ford
committed
Run test projects in each GPU usage mode
Christopher Willis-Ford
committed

Commits on Mar 21, 2019

Make touching-color test more robust against GPU imprecision
Christopher Willis-Ford
committed