source: data/data_extern/programs/GLSL120/skinningTwoWeightsShadowCasterVp.glsl @ 12202

#version 120
// Example GLSL program for skinning with two bone weights per vertex

attribute vec4 vertex;
attribute vec4 uv0;
attribute vec4 blendIndices;
attribute vec4 blendWeights;

uniform mat4x3 worldMatrix3x4Array[24];
uniform mat4 viewProjectionMatrix;
uniform vec4 ambient;

void main()
{
        vec3 blendPos = vec3(0,0,0);

        for (int bone = 0; bone < 2; ++bone)
        {
        // ATI GLSL compiler can't handle indexing an array within an array so calculate the inner index first
                int idx = int(blendIndices[bone]);

                // now weight this into final
                float weight = blendWeights[bone];
                blendPos += worldMatrix3x4Array[idx]* vertex * weight;
        }

        // apply view / projection to position
        gl_Position = viewProjectionMatrix * vec4(blendPos, 1);
        
        gl_FrontSecondaryColor = vec4(0,0,0,0);
        gl_FrontColor = ambient;
        gl_TexCoord[0] = uv0;
}