Adaptive polygons: possibility to use rectangular triangle as a base area

Question

This adds a possibility to use a rectangular triangle as a base area for the donor mesh. Previously, only a equilateral triangle could be used.

Preflight checklist

Put an x letter in each brackets when you're done this item:

• [x] Code changes complete.
• [x] Code documentation complete.
• [ ] Documentation for users complete (or not required, if user never sees these changes).
• [x] Manual testing done.
• [ ] Unit-tests implemented.
• [ ] Ready for merge.

该提问来源于开源项目：nortikin/sverchok

Answer 1

Bounding rectangle (used for quads):

Unit square (used for quads when Coordinates == As is):