31 lines
977 B
GLSL
31 lines
977 B
GLSL
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// -*- mode: C; -*-
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// Licence: GPL v2
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// Author: Frederic Bouvier.
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//
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varying vec3 ecNormal;
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varying float alpha;
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void main() {
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// Determine the rotation for the building. The Color alpha value provides rotation information
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float sr = sin(6.28 * gl_Color.a);
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float cr = cos(6.28 * gl_Color.a);
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vec3 position = gl_Vertex.xyz;
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// Rotation of the building and movement into position
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position.xy = vec2(dot(position.xy, vec2(cr, sr)), dot(position.xy, vec2(-sr, cr)));
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position = position + gl_Color.xyz;
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gl_Position = gl_ModelViewProjectionMatrix * vec4(position,1.0);
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// Rotate the normal.
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ecNormal = gl_Normal;
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ecNormal.xy = vec2(dot(ecNormal.xy, vec2(cr, sr)), dot(ecNormal.xy, vec2(-sr, cr)));
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ecNormal = gl_NormalMatrix * ecNormal;
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gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
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gl_FrontColor = vec4(1.0, 1.0, 1.0, 1.0);
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gl_BackColor = vec4(1.0, 1.0, 1.0, 1.0);
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alpha = 1.0;
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}
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