94 lines
2.9 KiB
HTML
94 lines
2.9 KiB
HTML
<HTML>
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<HEAD>
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<TITLE>PVVMUD - scene file format</TITLE>
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<LINK REL=STYLESHEET HREF="/pvvmud/pvvmud.css" TYPE="text/css">
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</HEAD>
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<BODY>
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<H1>Scene file format</H1>
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<PRE>
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Status : suggestion
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Implementations : none
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RCS info : $Id: scenefileformat.html,v 2.2 1999/10/15 12:47:24 andersr Exp $
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</PRE>
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<P>This file format descibe a static scene of 3d objects. Using
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keyframes to generate simple animations of transformations.
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Allows to include other scenes files as nodes.</P>
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<H3>Missing items</H3>
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<UL>
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<LI>Fog!
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<LI>LOD! Don't know if this is the correct way of doing it?
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</UL>
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<H2>Logical file structure</H2>
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<TABLE>
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<TR><TH></TH><TH></TH></TR>
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<TR><TD VALIGN=top><A NAME="SCENEFILE">scene file</TD><TD>= Scene head + Assembly list
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<TR><TD VALIGN=top><A NAME="SCENEHEAD">Scene head</TD><TD>= (Version)
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<TR><TD VALIGN=top><A NAME="ASSEMBLYLIST">Assembly list</TD><TD>= { Assembly }
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<TR><TD VALIGN=top><A NAME="ASSEMBLY">Assembly</TD><TD>= (Name)+ (Visibility range) + [ Tranformation |
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Animation list ] + (Visual) + (Light) + (Child)
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<TR><TD VALIGN=top><A NAME="VISIBILITYRANGE">Visibility range</TD><TD>= (Min range) + (Max range)
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<TR><TD VALIGN=top><A NAME="ANIMATIONLIST">Animation list</TD><TD>= {Animation}
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<TR><TD VALIGN=top><A NAME="ANIMATION">Animation</TD><TD>= (Name) +
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Length + Repeat + {KeyFrame}
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<TR><TD VALIGN=top><A NAME="KEYFRAME">KeyFrame</TD><TD>= (Time) + Transformation
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<TR><TD VALIGN=top><A NAME="TRANSFORMATION">Transformation</TD><TD>=
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(Translation) + (Rotation)
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<TR><TD VALIGN=top><A NAME="ROTATION">Rotation</TD><TD>= * Rotation = rotx roty rotz; *
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<TR><TD VALIGN=top><A NAME="TRANSLATION">Translation</TD><TD>= * Translation = xx yy zz ; *
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<TR><TD VALIGN=top><A NAME="VISUAL">Visual</TD><TD>= [ Geometry | Scene ]
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<TR><TD VALIGN=top><A NAME="LIGHT">Light</TD><TD>= * Don't know how this look yet *
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<TR><TD VALIGN=top><A NAME="CHILD">Child</TD><TD>= Assembly list
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<TR><TD VALIGN=top><A NAME="GEOMETRY">Geometry</TD><TD>= * Geometry = "Geofile"; *
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<TR><TD VALIGN=top><A NAME="SCENE">Scene</TD><TD>= * Scene = "Scenefile"; *
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<TR><TD VALIGN=top><A NAME="NAME">Name</TD><TD>= * Name that identify element *
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</TABLE>
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<H2>Example:</H2>
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<PRE>
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Scene(Version=1)
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Assembly {
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Visual {
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Geometry = "Terrain";
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}
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}
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Assembly {
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Transformation {
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Translation = 200.0 100.0 0.0;
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Rotation = 45.0 0.0 0.0;
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}
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Visual {
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Geometry = "Tree";
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}
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Assembly(Name = "Bird nest";Max=10.0) {
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Transformation {
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Translation = 0.7 0.3 9.0;
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}
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Visual {
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Scene = "Bird_Nest";
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}
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}
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Assembly ( Name = "Moving branch" ) {
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Animation ( Name = "default"; Time = 20; Repeat = TRUE ) {
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KeyFrame ( Time = 0 ){
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Rotation = 0.0 0.0 0.0;
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}
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KeyFrame ( Time = 5 ){
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Rotation = 5.0 0.0 0.0;
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}
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KeyFrame {
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Rotation = 0.0 0.0 0.0;
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}
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}
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Visual {
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Geometry = "Branch";
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}
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}
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</PRE>
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</BODY>
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</HTML>
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