normal.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 111 行

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<HTML><BODY><PRE>     <STRONG>NAME</STRONG>	  <STRONG>glNormal3b,</STRONG> <STRONG>glNormal3d,</STRONG> <STRONG>glNormal3f,</STRONG> <STRONG>glNormal3i,</STRONG> <STRONG>glNormal3s,</STRONG>	  <STRONG>glNormal3bv,</STRONG> <STRONG>glNormal3dv,</STRONG> <STRONG>glNormal3fv,</STRONG> <STRONG>glNormal3iv,</STRONG>	  <STRONG>glNormal3sv</STRONG> -	set the	current	normal vector     <STRONG>C</STRONG> <STRONG>SPECIFICATION</STRONG>	  void <STRONG>glNormal3b</STRONG>( GLbyte <EM>nx</EM>,			   GLbyte <EM>ny</EM>,			   GLbyte <EM>nz</EM> )	  void <STRONG>glNormal3d</STRONG>( GLdouble <EM>nx</EM>,			   GLdouble <EM>ny</EM>,			   GLdouble <EM>nz</EM> )	  void <STRONG>glNormal3f</STRONG>( GLfloat <EM>nx</EM>,			   GLfloat <EM>ny</EM>,			   GLfloat <EM>nz</EM> )	  void <STRONG>glNormal3i</STRONG>( GLint <EM>nx</EM>,			   GLint <EM>ny</EM>,			   GLint <EM>nz</EM> )	  void <STRONG>glNormal3s</STRONG>( GLshort <EM>nx</EM>,			   GLshort <EM>ny</EM>,			   GLshort <EM>nz</EM> )     <STRONG>PARAMETERS</STRONG>	  <EM>nx</EM>, <EM>ny</EM>, <EM>nz</EM>		    Specify the	x, y, and z coordinates	of the new		    current normal.  The initial value of the current		    normal is the unit vector, (0, 0, 1).     <STRONG>C</STRONG> <STRONG>SPECIFICATION</STRONG>	  void <STRONG>glNormal3bv</STRONG>( const GLbyte *<EM>v</EM> )	  void <STRONG>glNormal3dv</STRONG>( const GLdouble *<EM>v</EM> )	  void <STRONG>glNormal3fv</STRONG>( const GLfloat *<EM>v</EM> )	  void <STRONG>glNormal3iv</STRONG>( const GLint	*<EM>v</EM> )	  void <STRONG>glNormal3sv</STRONG>( const GLshort *<EM>v</EM> )     <STRONG>PARAMETERS</STRONG>	  <EM>v</EM>    Specifies a pointer to an array of three	elements:  the	       x, y, and z coordinates of the new current normal.     <STRONG>DESCRIPTION</STRONG>	  The current normal is	set to the given coordinates whenever	  <STRONG>glNormal</STRONG> is issued.  Byte, short, or integer arguments are	  converted to floating-point format with a linear mapping	  that maps the	most positive representable integer value to	  1.0, and the most negative representable integer value to	  -1.0.	  Normals specified with <STRONG>glNormal</STRONG> need not have	unit length.	  If normalization is enabled, then normals specified with	  <STRONG>glNormal</STRONG> are normalized after	transformation.	 To enable and	  disable normalization, call <STRONG>glEnable</STRONG> and <STRONG>glDisable</STRONG> with the	  argument <STRONG>GL_NORMALIZE</STRONG>.  Normalization	is initially disabled.     <STRONG>NOTES</STRONG>	  The current normal can be updated at any time.  In	  particular, <STRONG>glNormal</STRONG> can be called between a call to <STRONG>glBegin</STRONG>	  and the corresponding	call to	<STRONG>glEnd</STRONG>.     <STRONG>ASSOCIATED</STRONG>	<STRONG>GETS</STRONG>	  <STRONG>glGet</STRONG>	with argument <STRONG>GL_CURRENT_NORMAL</STRONG>	  <STRONG>glIsEnabled</STRONG> with argument <STRONG>GL_NORMALIZE</STRONG>     <STRONG>SEE</STRONG> <STRONG>ALSO</STRONG>	  <STRONG>glBegin</STRONG>, <STRONG>glColor</STRONG>, <STRONG>glIndex</STRONG>, <STRONG>glNormalPointer</STRONG>, <STRONG>glTexCoord</STRONG>,	  <STRONG>glVertex</STRONG></PRE></BODY></HTML>

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