glgetpointerv(3g) [centos man page]
GLGETPOINTERV(3G) OpenGL Manual GLGETPOINTERV(3G) NAME
glGetPointerv - return the address of the specified pointer C SPECIFICATION
void glGetPointerv(GLenum pname, GLvoid ** params); PARAMETERS
pname Specifies the array or buffer pointer to be returned. Symbolic constants GL_COLOR_ARRAY_POINTER, GL_EDGE_FLAG_ARRAY_POINTER, GL_FOG_COORD_ARRAY_POINTER, GL_FEEDBACK_BUFFER_POINTER, GL_INDEX_ARRAY_POINTER, GL_NORMAL_ARRAY_POINTER, GL_SECONDARY_COLOR_ARRAY_POINTER, GL_SELECTION_BUFFER_POINTER, GL_TEXTURE_COORD_ARRAY_POINTER, or GL_VERTEX_ARRAY_POINTER are accepted. params Returns the pointer value specified by pname. DESCRIPTION
glGetPointerv returns pointer information. pname is a symbolic constant indicating the pointer to be returned, and params is a pointer to a location in which to place the returned data. For all pname arguments except GL_FEEDBACK_BUFFER_POINTER and GL_SELECTION_BUFFER_POINTER, if a non-zero named buffer object was bound to the GL_ARRAY_BUFFER target (see glBindBuffer()) when the desired pointer was previously specified, the pointer returned is a byte offset into the buffer object's data store. Buffer objects are only available in OpenGL versions 1.5 and greater. NOTES
glGetPointerv is available only if the GL version is 1.1 or greater. GL_FOG_COORD_ARRAY_POINTER and GL_SECONDARY_COLOR_ARRAY_POINTER are available only if the GL version is 1.4 or greater. The pointers are all client-side state. The initial value for each pointer is 0. For OpenGL versions 1.3 and greater, or when the ARB_multitexture extension is supported, querying the GL_TEXTURE_COORD_ARRAY_POINTER returns the value for the active client texture unit. ERRORS
GL_INVALID_ENUM is generated if pname is not an accepted value. SEE ALSO
glBindBuffer(), glClientActiveTexture(), glColorPointer(), glEdgeFlagPointer(), glFogCoordPointer(), glFeedbackBuffer(), glGetVertexAttribPointerv(), glIndexPointer(), glNormalPointer(), glSecondaryColorPointer(), glSelectBuffer(), glTexCoordPointer(), glVertexAttribPointer(), glVertexPointer() 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 GLGETPOINTERV(3G)
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GLGETTEXGEN(3G) OpenGL Manual GLGETTEXGEN(3G) NAME
glGetTexGen - return texture coordinate generation parameters C SPECIFICATION
void glGetTexGendv(GLenum coord, GLenum pname, GLdouble * params); void glGetTexGenfv(GLenum coord, GLenum pname, GLfloat * params); void glGetTexGeniv(GLenum coord, GLenum pname, GLint * params); PARAMETERS
coord Specifies a texture coordinate. Must be GL_S, GL_T, GL_R, or GL_Q. pname Specifies the symbolic name of the value(s) to be returned. Must be either GL_TEXTURE_GEN_MODE or the name of one of the texture generation plane equations: GL_OBJECT_PLANE or GL_EYE_PLANE. params Returns the requested data. DESCRIPTION
glGetTexGen returns in params selected parameters of a texture coordinate generation function that was specified using glTexGen(). coord names one of the (s, t, r, q) texture coordinates, using the symbolic constant GL_S, GL_T, GL_R, or GL_Q. pname specifies one of three symbolic names: GL_TEXTURE_GEN_MODE params returns the single-valued texture generation function, a symbolic constant. The initial value is GL_EYE_LINEAR. GL_OBJECT_PLANE params returns the four plane equation coefficients that specify object linear-coordinate generation. Integer values, when requested, are mapped directly from the internal floating-point representation. GL_EYE_PLANE params returns the four plane equation coefficients that specify eye linear-coordinate generation. Integer values, when requested, are mapped directly from the internal floating-point representation. The returned values are those maintained in eye coordinates. They are not equal to the values specified using glTexGen(), unless the modelview matrix was identity when glTexGen() was called. NOTES
If an error is generated, no change is made to the contents of params. For OpenGL versions 1.3 and greater, or when the ARB_multitexture extension is supported, glGetTexGen returns the texture coordinate generation parameters for the active texture unit. ERRORS
GL_INVALID_ENUM is generated if coord or pname is not an accepted value. GL_INVALID_OPERATION is generated if glGetTexGen is executed between the execution of glBegin() and the corresponding execution of glEnd(). SEE ALSO
glActiveTexture(), glTexGen() 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 GLGETTEXGEN(3G)