Recently , I am learning NEHE''s OpenGL tutorials.In lesson 27, the tutorial tells me to use the stencil test to case shadow on the object.I look in MSDN Libaray,but I just can''t find out how stencil test operates.So can anyone tell me more about it? Many thanks!

Hey!Please give some hints.I just couldn''t sleep without get this problem illuminated.Please!Thank you very much!

You controll the stencil buffer with the function
glStencilMask(), glStencilOp() and glStencilFunc()

Take a look at http://biology.ncsa.uiuc.edu/cgi-bin/infosrch.cgi?cmd=getdoc&coll=0650&db=bks&fname=/SGI_Developer/OpenGL_RM/6302 for more information.

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"If it looks good, it is good computer graphics"
"If it looks like computer graphics, it is bad computer graphics"

Corrail
corrail@gmx.at
ICQ#59184081

Thank you, Corrail!