📄 getclipplane.html
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<HTML><BODY><PRE> <STRONG>NAME</STRONG> <STRONG>glGetClipPlane</STRONG> - return the coefficients of the specified clipping plane <STRONG>C</STRONG> <STRONG>SPECIFICATION</STRONG> void <STRONG>glGetClipPlane</STRONG>( GLenum <EM>plane</EM>, GLdouble *<EM>equation</EM> ) <STRONG>PARAMETERS</STRONG> <EM>plane</EM> 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 <STRONG>GL_CLIP_PLANE</STRONG>i where 0 <EM><</EM> i < <STRONG>GL_MAX_CLIP_PLANES</STRONG>. <EM>equation</EM> Returns four double-precision values that are the coefficients of the plane equation of <EM>plane</EM> in eye coordinates. The initial value is (0, 0, 0, 0). <STRONG>DESCRIPTION</STRONG> <STRONG>glGetClipPlane</STRONG> returns in <EM>equation</EM> the four coefficients of the plane equation for <EM>plane</EM>. <STRONG>NOTES</STRONG> It is always the case that <STRONG>GL_CLIP_PLANE</STRONG>i = <STRONG>GL_CLIP_PLANE0</STRONG> + i. If an error is generated, no change is made to the contents of <EM>equation</EM>. <STRONG>ERRORS</STRONG> <STRONG>GL_INVALID_ENUM</STRONG> is generated if <EM>plane</EM> is not an accepted value. <STRONG>GL_INVALID_OPERATION</STRONG> is generated if <STRONG>glGetClipPlane</STRONG> is executed between the execution of <STRONG>glBegin</STRONG> and the corresponding execution of <STRONG>glEnd</STRONG>. <STRONG>SEE</STRONG> <STRONG>ALSO</STRONG> <STRONG>glClipPlane</STRONG></PRE></BODY></HTML>⌨️ 快捷键说明
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