gluLoadSamplingMatrices()			     gluLoadSamplingMatrices()

NAME
       gluLoadSamplingMatrices - load NURBS sampling and culling matrices

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

PARAMETERS
       Specifies the NURBS object (created with gluNewNurbsRenderer()).	 Spec‐
       ifies a modelview matrix (as from a glGetFloatv() call).	  Specifies  a
       projection matrix (as from a glGetFloatv() call).  Specifies a viewport
       (as from a glGetIntegerv() call).

DESCRIPTION
       gluLoadSamplingMatrices() uses model, perspective, and view  to	recom‐
       pute  the  sampling  and	 culling matrices stored in nurb. The sampling
       matrix determines how finely a NURBS curve or surface must  be  tessel‐
       lated  to satisfy the sampling tolerance (as determined by the GLU_SAM‐
       PLING_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(3), gluNewNurbsRenderer(3), gluNurbsProperty(3)

						     gluLoadSamplingMatrices()

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