📄 node87.html
字号:
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 3.2 Final//FR"><!-- Converted with LaTeX2HTML 95.1 (Fri Jan 20 1995) --><!-- by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds --><!-- Modified Simulog 03/97 --><HTML><HEAD><TITLE>5.2 Stereoscopy</TITLE><LINK REL=STYLESHEET TYPE="text/css" HREF="./Modulef.css" TITLE="Modulef CSS"><meta name="description" value="5.2 Stereoscopy"><meta name="keywords" value="Guide6"><meta name="resource-type" value="document"><meta name="distribution" value="global"></HEAD><BODY BGCOLOR="#FFFFFF"><P> <IMG SRC="../icons/smallmod.gif" WIDTH=211 HEIGHT=50 ALIGN=BOTTOM ALT="Modulef"><A NAME=tex2html1492 HREF="node86.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/previous_motif.gif" ALT="previous"></A><A NAME=tex2html1496 HREF="node85.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/up_motif.gif" ALT="up"></A><A NAME=tex2html1498 HREF="node88.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/next_motif.gif" ALT="next"></A><A NAME=tex2html1500 HREF="node2.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/contents_motif.gif" ALT="contents"></A><A HREF="../Guide6-18/node87.html"><IMG BORDER=0 SRC="../icons/zoom18.gif" ALIGN=BOTTOM ALT="[BIG]"></A><A HREF="../Guide6-14/node87.html"><IMG BORDER=0 SRC="../icons/zoom14.gif" ALIGN=BOTTOM ALT="[Normal]"></A><A HREF="../Guide6-10/node87.html"><IMG BORDER=0 SRC="../icons/zoom10.gif" ALIGN=BOTTOM ALT="[small]"></A><BR><B> Next: </B> <A NAME=tex2html1499 HREF="node88.html">6 Input management</A><B>Up: </B> <A NAME=tex2html1497 HREF="node85.html">5 Graphics</A><B> Prev: </B> <A NAME=tex2html1493 HREF="node86.html">5.1 Color</A><B><A HREF="node2.html" >Contents</A></B><HR SIZE=3 WIDTH="75%"><H1><A NAME=SECTION05520000000000000000>5.2 Stereoscopy</A></H1><P><P><P> As hinted in the presentation, FORTRAN 3D offers the possibility, on certain terminalsdisposing of a sufficiently large number of colors, to obtain a stereoscopic set of images for a relief vision of the three-dimensional objects.The color table of these terminals must be totally modifiable (on an APOLLO station this necessitates utilization in "borrow" mode). The utilization of this function is very simple: It corresponds to call it directly after theterminal declaration (DEFDEV). Thereafter, the object is plotted totally normallywithout any other modification. To be able to distinguish the relief, it is of course necessary to wear a pair of glasses withred and green lenses, with the red lens on the left.If the stereoscopic image is printed on a color printer, it then necessary to look at it withred and cyan (blue and green) lenses, with red lens still on the left.<P><PRE> INTEGER FUNCTION STEREO(FLAG, ECART) LOGICAL FLAG REAL ECART</PRE><P>generates a red-green stereoscopic couple<A NAME=3275> </A> <A NAME=3276> </A> on a color graphics terminal,or a red-cyan stereoscopic couple on a printer.<P>The parameters are as follows:<P><UL><LI> if FLAG is .TRUE., stereo<LI> if FLAG is .FALSE., suppress the stereo<P><LI> ECART: the pupillary distance of the observer's eyes expressed in the object's unit system (user space). It can be calculated as a function of the object's dimensionsand its distance from the observer. The relief effect depends on its size. If it is too big, it can happen that the brain cannotreconstruct the image (the user will be obliged to squint too much).On return, if STEREO <IMG BORDER=0 ALIGN=MIDDLE ALT="" SRC="img118.gif"> 0, it is because stereoscopy is not possible on the terminal in use. If not,the stereo mode is introduced. </UL><P><P><HR SIZE=3 WIDTH="75%"><IMG SRC="../icons/smallmod.gif" WIDTH=211 HEIGHT=50 ALIGN=BOTTOM ALT="Modulef"><A NAME=tex2html1492 HREF="node86.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/previous_motif.gif" ALT="previous"></A><A NAME=tex2html1496 HREF="node85.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/up_motif.gif" ALT="up"></A><A NAME=tex2html1498 HREF="node88.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/next_motif.gif" ALT="next"></A><A NAME=tex2html1500 HREF="node2.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/contents_motif.gif" ALT="contents"></A><A HREF="../Guide6-18/node87.html"><IMG BORDER=0 SRC="../icons/zoom18.gif" ALIGN=BOTTOM ALT="[BIG]"></A><A HREF="../Guide6-14/node87.html"><IMG BORDER=0 SRC="../icons/zoom14.gif" ALIGN=BOTTOM ALT="[Normal]"></A><A HREF="../Guide6-10/node87.html"><IMG BORDER=0 SRC="../icons/zoom10.gif" ALIGN=BOTTOM ALT="[small]"></A><BR><B> Next: </B> <A NAME=tex2html1499 HREF="node88.html">6 Input management</A><B>Up: </B> <A NAME=tex2html1497 HREF="node85.html">5 Graphics</A><B> Prev: </B> <A NAME=tex2html1493 HREF="node86.html">5.1 Color</A><B><A HREF="node2.html" >Contents</A></B><BR> <HR><P><ADDRESS></ADDRESS></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 + -