Digital Equipment Corporation OpenGL man pages

Some notes on the new polygon tessellator in GLU version 1.2

GLU version 1.2 introduces a new polygon tessellator. The following routines have become obsolete and should not be used for new development based on GLU version 1.2 and later. 
	Obsolete Routine	Replace with

	gluBeginPolygon		gluTessBeginPolygon; gluTessBeginContour
	gluEndPolygon		gluTessEndContour; gluTessEndPolygon
	gluNextContour		gluTessEndContour; gluTessBeginContour

The following routines are new in GLU version 1.2: 

	gluGetTessProperty
	gluTessBeginContour
	gluTessBeginPolygon
	gluTessEndContour
	gluTessEndPolygon
	gluTessNormal
	gluTessProperty

Some routines have had an argument or return-value changed from ``GLUtriangulatorObj *'' to ``GLUtesselator *''. Since the GLU header file for version 1.2 has a typedef from GLUtriangulatorObj to GLUtesselator, source code should not need any immediate changes. However, at some time the source code should be moved to the GLU version 1.2 name. 

	gluBeginPolygon
	gluDeleteTess
	gluEndPolygon
	gluNewTess
	gluNextContour
	gluTessCallback
	gluTessVertex

One routine has been expanded to support more valid values for the which argument: 

	gluTessCallback

To distinguish what version of the GLU library you are using at compile time, check for the following pre-processor symbols: 

	none defined			version 1.0
	GLU_VERSION_1_1			version 1.1 or later
	GLU_VERSION_1_2			version 1.2 or later

Digital Open3D supports the following versions of the GLU library: 

	Digital Open3D Version		GLU Version Supported

	Before Version 2.6		version 1.0
	Version 2.6			version 1.1
	Version 3.0 and later		version 1.2

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Last Edited: Fri Dec 6 11:18:03 EST 1996 by AFV
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