NETGEN is an automatic 3d tetrahedral mesh generator. It accepts input from constructive solid geometry (CSG) or boundary representation (BRep) from STL file format. The connection to a geometry kernel allows the handling of IGES and STEP files. NETGEN contains modules for mesh optimization and hierarchical mesh refinement. Netgen is open source based on the LGPL license. It is available for Unix/Linux and Windows.

Tcl/Tk Opengl 의 조합으로 만들어진 오픈소스 Mesh generator 프로그램.

코드를 파보면 Tk위에 OpenGL을 어떻게 붙이고.. 어떤 방향으로 코딩을 해야하는지 알 수 있을것임.