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Revision 6871
(checked in by robert, 2 years ago)
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Checked in first cut of new SVN for OpenSceneGraph-Data
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// |
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// marble.vert: Vertex shader for producing a marble effect |
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// |
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// author: Randi Rost |
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// |
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// Copyright (c) 2002: 3Dlabs, Inc. |
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// |
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// Mike Weiblen 2003-09-19 : derived from ogl2demo in the 3Dlabs OpenGL2 SDK, |
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// available from http://www.3dlabs.com/opengl2/ |
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const float Scale = 1.0; |
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const vec3 LightPos = vec3( 0.0, 0.0, 4.0 ); |
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varying float LightIntensity; |
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varying vec3 MCposition; |
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void main(void) |
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{ |
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vec4 ECposition = gl_ModelViewMatrix * gl_Vertex; |
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MCposition = vec3 (gl_Vertex) * Scale; |
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vec3 tnorm = normalize(vec3 (gl_NormalMatrix * gl_Normal)); |
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LightIntensity = dot(normalize(LightPos - vec3 (ECposition)), tnorm) * 1.5; |
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gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex; |
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} |
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