cullface.html

来自「计算机图形学～想必是很多人需要的～在此共享一下」· HTML 代码 · 共 59 行

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<HTML><BODY><PRE>     <STRONG>NAME</STRONG>	  <STRONG>glCullFace</STRONG> - specify whether front- or back-facing facets	  can be culled     <STRONG>C</STRONG> <STRONG>SPECIFICATION</STRONG>	  void <STRONG>glCullFace</STRONG>( GLenum <EM>mode</EM> )     <STRONG>PARAMETERS</STRONG>	  <EM>mode</EM>	Specifies whether front- or back-facing	facets are		candidates for culling.	 Symbolic constants <STRONG>GL_FRONT</STRONG>,		<STRONG>GL_BACK</STRONG>, and <STRONG>GL_FRONT_AND_BACK</STRONG> are accepted.  The		initial	value is <STRONG>GL_BACK</STRONG>.     <STRONG>DESCRIPTION</STRONG>	  <STRONG>glCullFace</STRONG> specifies whether front- or back-facing facets	  are culled (as specified by <EM>mode</EM>) when facet culling is	  enabled. Facet culling is initially disabled.	 To enable and	  disable facet	culling, call the <STRONG>glEnable</STRONG> and <STRONG>glDisable</STRONG>	  commands with	the argument <STRONG>GL_CULL_FACE</STRONG>.  Facets include	  triangles, quadrilaterals, polygons, and rectangles.	  <STRONG>glFrontFace</STRONG> specifies	which of the clockwise and	  counterclockwise facets are front-facing and back-facing.	  See <STRONG>glFrontFace</STRONG>.     <STRONG>NOTES</STRONG>	  If  <EM>mode</EM> is <STRONG>GL_FRONT_AND_BACK</STRONG>, no facets are drawn, but	  other	primitives such	as points and lines are	drawn.     <STRONG>ERRORS</STRONG>	  <STRONG>GL_INVALID_ENUM</STRONG> is generated if <EM>mode</EM> is not an accepted	  value.	  <STRONG>GL_INVALID_OPERATION</STRONG> is generated if <STRONG>glCullFace</STRONG> is executed	  between the execution	of <STRONG>glBegin</STRONG> and the corresponding	  execution of <STRONG>glEnd</STRONG>.     <STRONG>ASSOCIATED</STRONG>	<STRONG>GETS</STRONG>	  <STRONG>glIsEnabled</STRONG> with argument <STRONG>GL_CULL_FACE</STRONG>	  <STRONG>glGet</STRONG>	with argument <STRONG>GL_CULL_FACE_MODE</STRONG>     <STRONG>SEE</STRONG> <STRONG>ALSO</STRONG>	  <STRONG>glEnable</STRONG>, <STRONG>glFrontFace</STRONG></PRE></BODY></HTML>

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