Posted by yaqiang on Aug 15, 2021; 10:01am
URL: https://forum.jogamp.org/Tessellation-polygons-visulization-problem-when-parallel-with-z-axis-tp4041194p4041200.html

Sorry, this is my program bug. JOGL tessellation has no problem. The program checks if a polygon is convex which will be plotted directly. The convex checking function only used x and y coordinates of the endpoints, which is the source of the problem.