glevalpoint2(3g) [centos man page]
GLEVALPOINT(3G) OpenGL Manual GLEVALPOINT(3G) NAME
glEvalPoint - generate and evaluate a single point in a mesh C SPECIFICATION
void glEvalPoint1(GLint i); void glEvalPoint2(GLint i, GLint j); PARAMETERS
i Specifies the integer value for grid domain variable i. j Specifies the integer value for grid domain variable j (glEvalPoint2 only). DESCRIPTION
glMapGrid() and glEvalMesh() are used in tandem to efficiently generate and evaluate a series of evenly spaced map domain values. glEvalPoint can be used to evaluate a single grid point in the same gridspace that is traversed by glEvalMesh(). Calling glEvalPoint1 is equivalent to calling glEvalCoord1( i . / u + u 1 ); where / u = u 2 - u 1 n and n, u 1, and u 2 are the arguments to the most recent glMapGrid1() command. The one absolute numeric requirement is that if i = n, then the value computed from i . / u + u 1 is exactly u 2. In the two-dimensional case, glEvalPoint2, let / u = u 2 - u 1 n.PP / v = v 2 - v 1 m where n, u 1, u 2, m, v 1, and v 2 are the arguments to the most recent glMapGrid2() command. Then the glEvalPoint2 command is equivalent to calling glEvalCoord2( i . / u + u 1 , j . / v + v 1 ); The only absolute numeric requirements are that if i = n, then the value computed from i . / u + u 1 is exactly u 2, and if j = m, then the value computed from j . / v + v 1 is exactly v 2. ASSOCIATED GETS
glGet() with argument GL_MAP1_GRID_DOMAIN glGet() with argument GL_MAP2_GRID_DOMAIN glGet() with argument GL_MAP1_GRID_SEGMENTS glGet() with argument GL_MAP2_GRID_SEGMENTS SEE ALSO
glEvalCoord(), glEvalMesh(), glMap1(), glMap2(), glMapGrid() 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 GLEVALPOINT(3G)
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GLEVALPOINT(3G) OpenGL Manual GLEVALPOINT(3G) NAME
glEvalPoint - generate and evaluate a single point in a mesh C SPECIFICATION
void glEvalPoint1(GLint i); void glEvalPoint2(GLint i, GLint j); PARAMETERS
i Specifies the integer value for grid domain variable i. j Specifies the integer value for grid domain variable j (glEvalPoint2 only). DESCRIPTION
glMapGrid() and glEvalMesh() are used in tandem to efficiently generate and evaluate a series of evenly spaced map domain values. glEvalPoint can be used to evaluate a single grid point in the same gridspace that is traversed by glEvalMesh(). Calling glEvalPoint1 is equivalent to calling glEvalCoord1( i . / u + u 1 ); where / u = u 2 - u 1 n and n, u 1, and u 2 are the arguments to the most recent glMapGrid1() command. The one absolute numeric requirement is that if i = n, then the value computed from i . / u + u 1 is exactly u 2. In the two-dimensional case, glEvalPoint2, let / u = u 2 - u 1 n.PP / v = v 2 - v 1 m where n, u 1, u 2, m, v 1, and v 2 are the arguments to the most recent glMapGrid2() command. Then the glEvalPoint2 command is equivalent to calling glEvalCoord2( i . / u + u 1 , j . / v + v 1 ); The only absolute numeric requirements are that if i = n, then the value computed from i . / u + u 1 is exactly u 2, and if j = m, then the value computed from j . / v + v 1 is exactly v 2. ASSOCIATED GETS
glGet() with argument GL_MAP1_GRID_DOMAIN glGet() with argument GL_MAP2_GRID_DOMAIN glGet() with argument GL_MAP1_GRID_SEGMENTS glGet() with argument GL_MAP2_GRID_SEGMENTS SEE ALSO
glEvalCoord(), glEvalMesh(), glMap1(), glMap2(), glMapGrid() 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 GLEVALPOINT(3G)