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Viewing changes to Utilities/MaterialLibrary/Repository/OrangeBook/Ch13/Ch13ParticleVert.glsl

  • Committer: Package Import Robot
  • Author(s): Anton Gladky
  • Date: 2014-01-07 21:26:32 UTC
  • Revision ID: package-import@ubuntu.com-20140107212632-vzwzmu3oyc3obmsg
Tags: upstream-6.0.0
Import upstream version 6.0.0

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Utilities/MaterialLibrary/Repository/OrangeBook/Ch13/Ch13ParticleVert.glsl
 
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//
 
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// Vertex shader for rendering a "confetti cannon"
 
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// via a partcle system
 
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//
 
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// Author: Randi Rost
 
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//
 
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// Copyright (c) 2003-2004: 3Dlabs, Inc.
 
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//
 
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// See 3Dlabs-License.txt for license information
 
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//
 
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uniform float Time;            // updated each frame by the application
 
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uniform vec4  Background;      // constant color equal to background
 
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attribute vec3  Velocity;      // initial velocity
 
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attribute float StartTime;     // time at which particle is activated
 
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varying vec4 Color;
 
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void main(void)
 
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{
 
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    vec4  vert;
 
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    float t = Time - StartTime;
 
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    if (t >= 0.0)
 
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    {
 
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        vert    = gl_Vertex + vec4 (Velocity * t, 0.0);
 
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        vert.y -= 4.9 * t * t;
 
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        Color   = gl_Color;
 
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    }
 
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    else
 
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    {
 
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        vert  = gl_Vertex;      // Initial position
 
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        Color = Background;     // "pre-birth" color
 
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    }
 
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    gl_Position  = gl_ModelViewProjectionMatrix * vert;
 
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}
 
 
b'\\ No newline at end of file'