source: data/branches/Shader_HS18/programs/Example/GLSL150/DualQuaternion_TwoPhaseShadowCaster.glsl @ 12083

#version 150

mat2x4 blendTwoWeightsAntipod(vec4 blendWgt, vec4 blendIdx, vec4 dualQuaternions[24]);
vec3 calculateBlendPosition(vec3 position, mat2x4 blendDQ);

uniform vec4 worldDualQuaternion2x4Array[24];
uniform vec4 scaleM[72];
uniform mat4 viewProjectionMatrix;
uniform vec4   ambient;

in vec4 vertex;
in vec4 blendIndices;
in vec4 blendWeights;

out vec4 ambientColour;

void main()
{       
        //First phase - applies scaling and shearing:
        int blendIndicesX = int(blendIndices.x) * 3;
        int blendIndicesY = int(blendIndices.y) * 3;
        
        mat3x4 blendS = blendWeights.x*mat3x4(scaleM[blendIndicesX], 
                scaleM[blendIndicesX + 1], scaleM[blendIndicesX + 2]);
        
        blendS += blendWeights.y*mat3x4(scaleM[blendIndicesY],
            scaleM[blendIndicesY + 1], scaleM[blendIndicesY + 2]);

        mat4x3 blendF = transpose(blendS);

        vec3 pass1_position = blendF * vertex;

        //Second phase
        mat2x4 blendDQ = blendTwoWeightsAntipod(blendWeights, blendIndices, worldDualQuaternion2x4Array);

        blendDQ /= length(blendDQ[0]);

        vec3 blendPosition = calculateBlendPosition(pass1_position, blendDQ);
        
        gl_Position =  viewProjectionMatrix * vec4(blendPosition, 1.0);

        ambientColour = ambient;                        
}