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GLULOADSAMPLINGMATRI(3G)		  OpenGL Manual 		 GLULOADSAMPLINGMATRI(3G)

NAME
       gluLoadSamplingMatrices - load NURBS sampling and culling matrices

C SPECIFICATION
       void gluLoadSamplingMatrices(GLUnurbs* nurb, const GLfloat * model,
				    const GLfloat * perspective, const GLint * view);

PARAMETERS
       nurb
	   Specifies the NURBS object (created with gluNewNurbsRenderer()).

       model
	   Specifies a modelview matrix (as from a glGetFloatv() call).

       perspective
	   Specifies a projection matrix (as from a glGetFloatv() call).

       view
	   Specifies a viewport (as from a glGetIntegerv() call).

DESCRIPTION
       gluLoadSamplingMatrices uses model, perspective, and view to recompute the sampling and
       culling matrices stored in nurb. The sampling matrix determines how finely a NURBS curve
       or surface must be tessellated to satisfy the sampling tolerance (as determined by the
       GLU_SAMPLING_TOLERANCE property). The culling matrix is used in deciding if a NURBS curve
       or surface should be culled before rendering (when the GLU_CULLING property is turned on).

       gluLoadSamplingMatrices is necessary only if the GLU_AUTO_LOAD_MATRIX property is turned
       off (see gluNurbsProperty()). Although it can be convenient to leave the
       GLU_AUTO_LOAD_MATRIX property turned on, there can be a performance penalty for doing so.
       (A round trip to the GL server is needed to fetch the current values of the modelview
       matrix, projection matrix, and viewport.)

SEE ALSO
       gluGetNurbsProperty(), gluNewNurbsRenderer(), gluNurbsProperty()

COPYRIGHT
       Copyright (C) 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI
       Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.

AUTHORS
       opengl.org

opengl.org				    06/10/2014			 GLULOADSAMPLINGMATRI(3G)
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