134 lines
5.4 KiB
HTML
134 lines
5.4 KiB
HTML
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<!DOCTYPE html PUBLIC "-//IETF//DTD HTML 2.0//EN">
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<HTML>
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<HEAD>
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<META name="generator" content="HTML Tidy, see www.w3.org">
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<TITLE>Step 2: Render using POVray</TITLE>
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<LINK type="text/css" rel="stylesheet" href="../webdocs.css">
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</HEAD>
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<BODY>
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<P><A href="step1-cube.html">[Previous - Step 1: Cube Map]</A>
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<A href="step3-post.html">[Next - Step 3: Post
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Processing]</A></P>
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<H1>Step 2: Render using POVray.</H1>
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<P>At this point you should have your six-sided cube map. If
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not, go and do the stuff in <A href="step1-cube.html">step
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1</A>. The cube sides should be named <B>env1.tga</B> through
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<B>env6.tga</B> and should correspond to the sides shown in the
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reference graphic in <A href="step1-cube.html">step 1</A>. From
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this point forward we will refer to these six targa files as
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your <I>cube map textures</I>. Note that as long as your cube
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map textures were generated with equal horizontal and vertial
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FOV, it does not matter what their dimensions are. For example,
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Anachronox would have written screenshot files at the
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resolution of the game, say, 1280x960, and these non-square
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images are just fine for use in this step. Do <B>NOT</B> shrink
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down these images before using them here because you will
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degrade the quality of the environment map. We only shrink down
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the image sizes in the last step.</P>
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<P>This step involves using POVray to render the cube map onto
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two back-to-back parabolic mirrors. If you want to see a
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visualization of what these surfaces look like, check out <A
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href="joeyparab.m1v">this neato render</A> that I did (1.9 MB
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mpeg1 video).</P>
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<H4>POVray installation</H4>
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<P>POVray 3.1 or higher must be installed on your system. You
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can find a copy of POVray for Windows on our PION server. Just
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run <B>POVWIN3.EXE</B> from <A target="_blank" href=
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"file:////pion/devl/anox/envgen/install">
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\\pion\devl\anox\envgen\install</A>. This zip file in that
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directory is optional and does not need to be installed.</P>
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<P>Once POVray is happily installed, take your cube map
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textures and dump them into <A target="_blank" href=
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"file:////pion/devl/anox/envgen/input">
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\\pion\devl\anox\envgen\input</A>. Note that since this
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directory is accessibly by everybody, you should make sure that
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nobody else is trying to do this at the same time. Now it's
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time to execute a batch file.</P>
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<P>Open up a command prompt Window. Lets say you have <B>
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\\pion\devl</B> mapped to your <B>V:</B> drive. Go to your <B>
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V:</B> drive, then change your current directory to <B>
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\anox\envgen</B>. Now run the batch file envgen.bat. Here is a
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sample command prompt session:</P>
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<PRE class="cmd">
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Microsoft Windows 2000 [Version 5.00.2195]
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(C) Copyright 1985-2000 Microsoft Corp.
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C:\><B>v:</B>
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V:\><B>cd\anox\envgen</B>
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V:\anox\envgen><B>dir</B>
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Volume in drive V is ION_STORM
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Volume Serial Number is 0000-0000
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Directory of V:\anox\envgen
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12/04/2000 02:45p <DIR> .
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12/04/2000 02:45p <DIR> ..
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12/04/2000 02:08p <DIR> bin
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12/04/2000 02:33p <DIR> data
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12/04/2000 02:30p <DIR> input
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12/04/2000 02:47p <DIR> install
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12/04/2000 02:52p <DIR> output
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12/04/2000 02:37p 774 envgen.bat
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1 File(s) 774 bytes
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7 Dir(s) 999,999,999 bytes free
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V:\anox\envgen><B>envgen</B>
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Ready to render to .\output\
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Press any key to continue . . .
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</PRE>
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<P>The <B>envgen.bat</B> batch file will check to make sure
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that all the necessary binary and data files are in the right
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place before proceeding. After pressing a key, POVwin for
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Windows should start, and it will render two 1024x1024 Targa
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files and place them into output. It takes a while for POVray
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to render, so be patient. Here is a sample screenshot of what
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you should see while POVray is rendering:</P>
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<P><IMG src="povray-screen.gif" alt="POVray screenshot"></P>
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<P>Note that you can interrupt the render by clicking "Stop" in
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the toolbar. Please do not modify the batch file on the PION
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server or any of the POVray scene files, since everybody is
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using the same files. You can copy the entire \anox\envgen
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directory to your local hard drive if you want to make changes.
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When POVray is done, the \anox\envgen\output directory should
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contain 1.tga and 2.tga like this:</P>
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<PRE class="cmd">
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V:\anox\envgen><B>dir output</B>
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Volume in drive V is ION_STORM
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Volume Serial Number is CCE1-EA2B
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Directory of V:\anox\envgen\output
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12/04/2000 09:05p <DIR> .
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12/04/2000 09:05p <DIR> ..
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12/04/2000 09:04p 2,644,648 1.tga
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12/04/2000 09:06p 2,625,045 2.tga
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2 File(s) 5,269,693 bytes
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2 Dir(s) 1,554,313,216 bytes free
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</PRE>
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<P>That's it! Now you have two hi-resolution renders to be used
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as sources for the parabolic environment map textures. You're
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now ready for the next step...</P>
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<P><A href="step1-cube.html">[Previous - Step 1: Cube Map]</A>
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|
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<A href="step3-post.html">[Next - Step 3: Post
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Processing]</A></P>
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</BODY>
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</HTML>
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