_C_ License Applicability. Except to the extent portions of this file are _C_ made subject to an alternative license as permitted in the SGI Free _C_ Software License B, Version 1.1 (the "License"), the contents of this _C_ file are subject only to the provisions of the License. You may not use _C_ this file except in compliance with the License. You may obtain a copy _C_ of the License at Silicon Graphics, Inc., attn: Legal Services, 1600 _C_ Amphitheatre Parkway, Mountain View, CA 94043-1351, or at: _C_ _C_ http://oss.sgi.com/projects/FreeB _C_ _C_ Note that, as provided in the License, the Software is distributed on an _C_ "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS _C_ DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND _C_ CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A _C_ PARTICULAR PURPOSE, AND NON-INFRINGEMENT. _C_ _C_ Original Code. The Original Code is: OpenGL Sample Implementation, _C_ Version 1.2.1, released January 26, 2000, developed by Silicon Graphics, _C_ Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc. _C_ Copyright in any portions created by third parties is as indicated _C_ elsewhere herein. All Rights Reserved. _C_ _C_ Additional Notice Provisions: The application programming interfaces _C_ established by SGI in conjunction with the Original Code are The _C_ OpenGL(R) Graphics System: A Specification (Version 1.2.1), released _C_ April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version _C_ 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X _C_ Window System(R) (Version 1.3), released October 19, 1998. This software _C_ was created using the OpenGL(R) version 1.2.1 Sample Implementation _C_ published by SGI, but has not been independently verified as being _C_ compliant with the OpenGL(R) version 1.2.1 Specification. _C_ _C_ The first character in this file must be an '_'! _C_ Anything on a line after _C_ is ignored _define(_filters,eqn)_C_ _C_ eqn is automatically replaced with neqn for nroff _header(GetTexGen,return texture coordinate generation parameters) _names(GetTexGen,[dfi]v) .EQ delim $$ .EN .SH PARAMETERS _phead(_param1) Specifies a texture coordinate. Must be _const(S), _const(T), _const(R), or _const(Q). _phead(_param2) Specifies the symbolic name of the value(s) to be returned. Must be either _const(TEXTURE_GEN_MODE) or the name of one of the texture generation plane equations: _const(OBJECT_PLANE) or _const(EYE_PLANE). _phead(_param3) Returns the requested data. .SH DESCRIPTION _cmnd returns in _param3 selected parameters of a texture coordinate generation function that was specified using _cmnd(TexGen). _param1 names one of the (\f2s\fP, \f2t\fP, \f2r\fP, \f2q\fP) texture coordinates, using the symbolic constant _const(S), _const(T), _const(R), or _const(Q). .P _param2 specifies one of three symbolic names: .TP 28 _const(TEXTURE_GEN_MODE) _param3 returns the single-valued texture generation function, a symbolic constant. The initial value is _const(EYE_LINEAR). .TP _const(OBJECT_PLANE) _param3 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. .BP .TP _const(EYE_PLANE) _param3 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 _cmnd(TexGen), unless the modelview matrix was identity when _cmnd(TexGen) was called. .SH NOTES If an error is generated, no change is made to the contents of _param3. .P When the _arbstring(multitexture) extension is supported, _cmnd returns the texture coordinate generation parameters for the active texture unit. .SH ERRORS _const(INVALID_ENUM) is generated if _param1 or _param2 is not an accepted value. .P _const(INVALID_OPERATION) is generated if _cmnd is executed between the execution of _cmnd(Begin) and the corresponding execution of _cmnd(End). .SH SEE ALSO _cmnd(ActiveTextureARB), _cmnd(TexGen)