**glGetClipPlane**

### NAME

**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_PLANE***i* 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.

### DESCRIPTION

**glGetClipPlane** returns in *equation* the four coefficients of the
plane equation for *plane*.
### NOTES

It is always the case that **GL_CLIP_PLANE***i* =
**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 called
between a call to **glBegin** and the
corresponding call to **glEnd**.

### SEE ALSO

**glClipPlane**

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© *1995 Uwe Behrens. All rights reserved.*