C language function:gluBeginTrim sample codes

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TITLE : Chapter 13. Evaluators and NURBS
To create a trimmed NURBS surface with OpenGL, start as if you were creating an untrimmed surface. After calling gluBeginSurface() and gluNurbsSurface() but before calling gluEndSurface(), start a trim by calling gluBeginTrim()........
http://csweb.cs.wfu.edu/~torgerse/Kokua/Irix_6.5.21_doc_cd/usr/share/Insight/library/SGI_bookshelves/SGI_Developer/books/OpenGL_PG/sgi_html/ch13.html


TITLE : OpenGL Changes
Modified gluBeginTrim().......
http://developer.apple.com/library/content/releasenotes/General/APIDiffsMacOSX10_9/OpenGL.html
TITLE : gluEndTrim function (Windows)
gluBeginTrim(nobj);.......
http://msdn.microsoft.com/ja-jp/ee872074
TITLE : c++ - Trim NURBS surface with OPEN GL - Stack Overflow
gluBeginTrim(theNurb);.......
http://stackoverflow.com/questions/40637061/trim-nurbs-surface-with-open-gl
TITLE : EDM/2 - OpenGL and OS/2 - All About NURBS
A trimming curve has to be surrounded by a gluBeginTrim(), gluEndTrim() pair, and because the trimming commands operate on the nurb, the commands must occur between the gluBeginSurface() and gluEndSurface() pair as well........
http://www.edm2.com/0608/opengl.html
TITLE : EDM/2 - OpenGL and OS/2 - All About NURBS
gluBeginTrim( nurbSurface );.......
http://www.edm2.com/0608/opengl.html
TITLE : Chapter 12 - OpenGL Programming Guide
To create a trimmed NURBS surface with OpenGL, start as if you were creating an untrimmed surface. After calling gluBeginSurface() and gluNurbsSurface() but before calling gluEndSurface(), start a trim by calling gluBeginTrim()........
http://www.glprogramming.com/red/chapter12.html
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