glGetClipPlane: return the coefficients of the specified clipping
C Specification |
glGetClipPlane returns in equation the four
coefficients of the plane equation for plane.
It is always the case that GL_CLIP_PLANEi =
GL_CLIP_PLANE0 + i.
- Specifies a clipping plane. The number of clipping planes depends on the
implementation, but at least six clipping planes are supported. They are
identified by symbolic names of the form
GL_CLIP_PLANEi where 0 i <
- Returns four double-precision values that are the coefficients of the
plane equation of plane in eye coordinates. The initial
value is (0, 0, 0, 0).
If an error is generated, no change is made to the contents of
- GL_INVALID_ENUM is generated if plane is
not an accepted value.
- GL_INVALID_OPERATION is generated if glGetClipPlane is executed between
the execution of glBegin and the
corresponding execution of glEnd.