Index for Section 3G

Alphabetical listing for G

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glGetTexGen(3G)
NAME
  glGetTexGen, glGetTexGendv, glGetTexGendfv, glGetTexGeniv - return texture
  coordinate generation parameters

SYNOPSIS
  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.

  When the GL_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
  glActiveTextureARB(3), glTexGen(3)

Index for Section 3G

Alphabetical listing for G

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