Posted by elect on Feb 10, 2016; 6:41pm
URL: https://forum.jogamp.org/Extending-Functionality-of-Shader-Programs-tp4036139p4036157.html

I draw first the triangle {-1, 1}, {-1, -1}, {1, 1}

then:
- {-2, 2}, {-2, 0}, {0, 2}
- {-2, 0}, {-2, -2}, {0, 0}
- {0, 2}, {0, 0}, {2, 2}

and finally I underlined the outmost shape

look the image at the center, not the one at the bottom