[INFO] Tesselation Note

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OpenGL Tess/ Winding Rule Type Note:

from https://www.glprogramming.com/red/chapter11.html

see more => http://what-when-how.com/opengl-programming-guide/polygon-tessellation-tessellators-and-quadrics-opengl-programming-part-2/

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Tess with NONZERO winding rule

we use NONZERO winding rule as default (compat with Agg/CpuBlit)

To have a hole, outer and inner must not go in the same direction

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Tess with ODD winding rule

To have a hole, outer border and inner border can go in any direction (clockwise,counter-clockwise)

outer and inner border go in the same direction, tess provide a hole too

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