G
glXGetClipPlane
Chapter 7
187
glXGetClipPlane
glGetClipPlane: return the coefficients of the specified clipping plane.
C Specification
void glGetClipPlane(
GLenum plane,
GLdouble *equation)
Parameters
plane 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 < GL_MAX_CLIP_PLANES.
equation 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).
Description
glGetClipPlane returns in equation the four coefficients of the plane equation for plane.
Notes
It is always the case that GL_CLIP_PLANEi = GL_CLIP_PLANE0 + i.
If an error is generated, no change is made to the contents of equation.
Errors
• 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.
See Also
glClipPlane
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