59 lines
1.7 KiB
GLSL
59 lines
1.7 KiB
GLSL
// -*- mode: C; -*-
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// Licence: GPL v2
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// Author: Vivian Meazza.
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varying vec3 rawpos;
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varying vec3 VNormal;
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varying vec4 constantColor;
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varying vec3 vViewVec;
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varying vec3 reflVec;
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varying vec4 Diffuse;
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varying float alpha;
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//varying float fogCoord;
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uniform mat4 osg_ViewMatrixInverse;
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//attribute vec3 tangent, binormal, normal;
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void main(void)
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{
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rawpos = gl_Vertex.xyz / gl_Vertex.w;
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vec4 ecPosition = gl_ModelViewMatrix * gl_Vertex;
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ecPosition.xyz = ecPosition.xyz / ecPosition.w;
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vec3 t = normalize(cross(gl_Normal, vec3(1.0,0.0,0.0)));
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vec3 b = normalize(cross(gl_Normal,t));
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vec3 n = normalize(gl_Normal);
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VNormal = normalize(gl_NormalMatrix * gl_Normal);
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Diffuse = gl_Color * gl_LightSource[0].diffuse;
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//Diffuse= gl_Color.rgb * max(0.0, dot(normalize(VNormal), gl_LightSource[0].position.xyz));
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// Super hack: if diffuse material alpha is less than 1, assume a
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// transparency animation is at work
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if (gl_FrontMaterial.diffuse.a < 1.0)
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alpha = gl_FrontMaterial.diffuse.a;
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else
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alpha = gl_Color.a;
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//fogCoord = abs(ecPosition.z);
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// Vertex in eye coordinates
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vec3 vertVec = ecPosition.xyz;
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vViewVec.x = dot(t, vertVec);
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vViewVec.y = dot(b, vertVec);
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vViewVec.z = dot(n, vertVec);
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// calculate the reflection vector
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vec4 reflect_eye = vec4(reflect(vertVec, VNormal), 0.0);
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reflVec = normalize(gl_ModelViewMatrixInverse * reflect_eye).xyz;
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gl_FrontColor = gl_Color;
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constantColor = gl_FrontMaterial.emission
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+ gl_Color * (gl_LightModel.ambient + gl_LightSource[0].ambient);
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gl_Position = ftransform();
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gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
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}
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