1GLULOADSAMPLINGMATRICES(3G)                        GLULOADSAMPLINGMATRICES(3G)
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NAME

6       gluLoadSamplingMatrices - load NURBS sampling and culling matrices
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C SPECIFICATION

10       void gluLoadSamplingMatrices( GLUnurbs* nurb,
11                                     const GLfloat *model,
12                                     const GLfloat *perspective,
13                                     const GLint *view )
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PARAMETERS

17       nurb         Specifies     the     NURBS     object    (created    with
18                    gluNewNurbsRenderer).
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20       model        Specifies a modelview matrix (as from a glGetFloatv call).
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22       perspective  Specifies a  projection  matrix  (as  from  a  glGetFloatv
23                    call).
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25       view         Specifies a viewport (as from a glGetIntegerv call).
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DESCRIPTION

28       gluLoadSamplingMatrices  uses model, perspective, and view to recompute
29       the sampling and culling matrices stored in nurb.  The sampling  matrix
30       determines  how  finely a NURBS curve or surface must be tessellated to
31       satisfy   the   sampling    tolerance    (as    determined    by    the
32       GLU_SAMPLING_TOLERANCE property).  The culling matrix is used in decid‐
33       ing if a NURBS curve or surface should be culled before rendering (when
34       the GLU_CULLING property is turned on).
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36       gluLoadSamplingMatrices  is  necessary only if the GLU_AUTO_LOAD_MATRIX
37       property is turned off (see gluNurbsProperty).  Although it can be con‐
38       venient to leave the GLU_AUTO_LOAD_MATRIX property turned on, there can
39       be a performance penalty for doing so.  (A round trip to the GL  server
40       is  needed to fetch the current values of the modelview matrix, projec‐
41       tion matrix, and viewport.)
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SEE ALSO

44       gluGetNurbsProperty(3G), gluNewNurbsRenderer(3G), gluNurbsProperty(3G)
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48                                                   GLULOADSAMPLINGMATRICES(3G)