📄 getmaterial.html

📁 计算机图形学～想必是很多人需要的～在此共享一下
💻 HTML
字号:
<HTML><BODY><PRE>     <STRONG>NAME</STRONG>	  <STRONG>glGetMaterialfv,</STRONG> <STRONG>glGetMaterialiv</STRONG> - return material	  parameters     <STRONG>C</STRONG> <STRONG>SPECIFICATION</STRONG>	  void <STRONG>glGetMaterialfv</STRONG>(	GLenum <EM>face</EM>,				GLenum <EM>pname</EM>,				GLfloat	*<EM>params</EM>	)	  void <STRONG>glGetMaterialiv</STRONG>(	GLenum <EM>face</EM>,				GLenum <EM>pname</EM>,				GLint *<EM>params</EM> )     <STRONG>PARAMETERS</STRONG>	  <EM>face</EM>	  Specifies which of the two materials is being		  queried.  <STRONG>GL_FRONT</STRONG> or	<STRONG>GL_BACK</STRONG>	are accepted,		  representing the front and back materials,		  respectively.	  <EM>pname</EM>	  Specifies the	material parameter to return.		  <STRONG>GL_AMBIENT</STRONG>, <STRONG>GL_DIFFUSE</STRONG>, <STRONG>GL_SPECULAR</STRONG>, <STRONG>GL_EMISSION</STRONG>,		  <STRONG>GL_SHININESS</STRONG>,	and <STRONG>GL_COLOR_INDEXES</STRONG> are accepted.	  <EM>params</EM>  Returns the requested	data.     <STRONG>DESCRIPTION</STRONG>	  <STRONG>glGetMaterial</STRONG>	returns	in <EM>params</EM> the value or values of	  parameter <EM>pname</EM> of material <EM>face</EM>. Six	parameters are	  defined:	  <STRONG>GL_AMBIENT</STRONG>		<EM>params</EM> returns four integer or				floating-point values representing the				ambient	reflectance of the material.				Integer	values,	when requested,	are				linearly mapped	from the internal				floating-point representation such				that 1.0 maps to the most positive				representable integer value, and -1.0				maps to	the most negative				representable integer value.  If the				internal value is outside the range				[-1, 1], the corresponding integer				return value is	undefined. The initial				value is (0.2, 0.2, 0.2, 1.0)	  <STRONG>GL_DIFFUSE</STRONG>		<EM>params</EM> returns four integer or				floating-point values representing the				diffuse	reflectance of the material.				Integer	values,	when requested,	are				linearly mapped	from the internal				floating-point representation such				that 1.0 maps to the most positive				representable integer value, and -1.0				maps to	the most negative				representable integer value.  If the				internal value is outside the range				[-1, 1], the corresponding integer				return value is	undefined. The initial				value is (0.8, 0.8, 0.8, 1.0).	  <STRONG>GL_SPECULAR</STRONG>		<EM>params</EM> returns four integer or				floating-point values representing the				specular reflectance of	the material.				Integer	values,	when requested,	are				linearly mapped	from the internal				floating-point representation such				that 1.0 maps to the most positive				representable integer value, and -1.0				maps to	the most negative				representable integer value.  If the				internal value is outside the range				[-1, 1], the corresponding integer				return value is	undefined. The initial				value is (0, 0,	0, 1).	  <STRONG>GL_EMISSION</STRONG>		<EM>params</EM> returns four integer or				floating-point values representing the				emitted	light intensity	of the				material.  Integer values, when				requested, are linearly	mapped from				the internal floating-point				representation such that 1.0 maps to				the most positive representable				integer	value, and -1.0	maps to	the				most negative representable integer				value.	If the internal	value is				outside	the range [-1, 1.0], the				corresponding integer return value is				undefined. The initial value is	(0, 0,				0, 1).	  <STRONG>GL_SHININESS</STRONG>		<EM>params</EM> returns one integer or				floating-point value representing the				specular exponent of the material.				Integer	values,	when requested,	are				computed by rounding the internal				floating-point value to	the nearest				integer	value. The initial value is 0.	  <STRONG>GL_COLOR_INDEXES</STRONG>	<EM>params</EM> returns three integer or				floating-point values representing the				ambient, diffuse, and specular indices				of the material.  These	indices	are				used only for color index lighting.				(All the other parameters are used				only for RGBA lighting.)  Integer				values,	when requested,	are computed				by rounding the	internal floating-				point values to	the nearest integer				values.     <STRONG>NOTES</STRONG>	  If an	error is generated, no change is made to the contents	  of <EM>params</EM>.     <STRONG>ERRORS</STRONG>	  <STRONG>GL_INVALID_ENUM</STRONG> is generated if <EM>face</EM> or <EM>pname</EM>	is not an	  accepted value.	  <STRONG>GL_INVALID_OPERATION</STRONG> is generated if <STRONG>glGetMaterial</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>glMaterial</STRONG></PRE></BODY></HTML>
⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -