fglortho.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

HTML
111 行
字号 
<HTML><BODY><PRE>     <STRONG>NAME</STRONG>	  <STRONG>fglOrtho</STRONG> - multiply the current matrix with an orthographic	  matrix     <STRONG>FORTRAN</STRONG> <STRONG>SPECIFICATION</STRONG>	  SUBROUTINE <STRONG>fglOrtho</STRONG>( REAL*8 <EM>left</EM>,			       REAL*8 <EM>right</EM>,			       REAL*8 <EM>bottom</EM>,			       REAL*8 <EM>top</EM>,			       REAL*8 <EM>zNear</EM>,			       REAL*8 <EM>zFar</EM> )     <STRONG>PARAMETERS</STRONG>	  <EM>left</EM>,	<EM>right</EM> Specify the coordinates for the left and right		      vertical clipping	planes.	  <EM>bottom</EM>, <EM>top</EM> Specify the coordinates for the bottom and top		      horizontal clipping planes.	  <EM>zNear</EM>, <EM>zFar</EM> Specify the distances to the nearer and farther		      depth clipping planes.  These values are		      negative if the plane is to be behind the		      viewer.     <STRONG>DESCRIPTION</STRONG>	  <STRONG>fglOrtho</STRONG> describes a transformation that produces a parallel	  projection.  The current matrix (see <STRONG>fglMatrixMode</STRONG>) is	  multiplied by	this matrix and	the result replaces the	  current matrix, as if	<STRONG>fglMultMatrix</STRONG> were called with the	  following matrix as its argument:		   (					   )		   |_____<STRONG>_</STRONG>____	    0		0	t  |		   |right-left				 x |		   |		_____<STRONG>_</STRONG>____		   |		   |	0	top-bottom	0	ty |		   |					   |		   |	0	    0	    ____<STRONG>__</STRONG>____	t  |		   |			    zFar-zNear	 z |		   |	0	    0		0	1  |		   (					   )	  where				t  = -<STRONG>__________</STRONG>				 x    right-left				t  = -<STRONG>__________</STRONG>				 y    top-bottom				t  = -<STRONG>__________</STRONG>				 z    zFar-zNear	  Typically, the matrix	mode is	<STRONG>GL_PROJECTION</STRONG>, and (<EM>left</EM>,	  <EM>bottom</EM>,  -<EM>zNear</EM>) and (<EM>right</EM>, <EM>top</EM>,  -<EM>zNear</EM>) specify the	  points on the	near clipping plane that are mapped to the	  lower	left and upper right corners of	the window,	  respectively,	assuming that the eye is located at (0,	0, 0).	  -<EM>zFar</EM>	specifies the location of the far clipping plane.	  Both <EM>zNear</EM> and <EM>zFar</EM> can be either positive or	negative.	  Use <STRONG>fglPushMatrix</STRONG> and	<STRONG>fglPopMatrix</STRONG> to	save and restore the	  current matrix stack.     <STRONG>ERRORS</STRONG>	  <STRONG>GL_INVALID_OPERATION</STRONG> is generated if <STRONG>fglOrtho</STRONG>	is executed	  between the execution	of <STRONG>fglBegin</STRONG> and	the corresponding	  execution of <STRONG>fglEnd</STRONG>.     <STRONG>ASSOCIATED</STRONG>	<STRONG>GETS</STRONG>	  <STRONG>fglGet</STRONG> with argument <STRONG>GL_MATRIX_MODE</STRONG>	  <STRONG>fglGet</STRONG> with argument <STRONG>GL_MODELVIEW_MATRIX</STRONG>	  <STRONG>fglGet</STRONG> with argument <STRONG>GL_PROJECTION_MATRIX</STRONG>	  <STRONG>fglGet</STRONG> with argument <STRONG>GL_TEXTURE_MATRIX</STRONG>     <STRONG>SEE</STRONG> <STRONG>ALSO</STRONG>	  <STRONG>fglFrustum</STRONG>, <STRONG>fglMatrixMode</STRONG>, <STRONG>fglMultMatrix</STRONG>, <STRONG>fglPushMatrix</STRONG>,	  <STRONG>fglViewport</STRONG></PRE></BODY></HTML>

fglortho.html - 源码说明

本页面展示了「计算机图形学～想必是很多人需要的～在此共享一下」中的 fglortho.html 源码文件，采用 HTML 编程语言编写，共 111 行代码。您可以在线阅读完整代码内容，也可以返回资源详情页下载完整源码包进行本地学习和开发。

虫虫下载站收录了大量与计算机图形学相关的技术资源，包括源代码、技术文档、电路图等，是电子工程师和嵌入式开发者的专业学习平台。

⌨️ 快捷键说明

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