glGetClipPlane − return the coefficients of the specified clipping plane
void glGetClipPlane( GLenum plane,
GLdouble *equation ) |
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_PLANE where 0 ≤ < GL_MAX_CLIP_PLANES. |
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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). |
glGetClipPlane returns in equation the four coefficients of the plane equation for plane.
It is always the case that GL_CLIP_PLANE = GL_CLIP_PLANE0 + .
If an error is generated, no change is made to the contents of equation.
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.