source: data/branches/Shader_HS18/programs/GLSL150/pssmReceiverVp.glsl @ 12115

#version 150

uniform vec4 lightPosition;                             // object space
uniform vec3 eyePosition;                                       // object space
uniform mat4 worldViewProjMatrix;
uniform mat4 texWorldViewProjMatrix0;
uniform mat4 texWorldViewProjMatrix1;
uniform mat4 texWorldViewProjMatrix2;

out vec4 oUv0;
out vec3 oLightDir;
out vec3 oHalfAngle;
out vec4 oLightPosition0;
out vec4 oLightPosition1;
out vec4 oLightPosition2;
out vec3 oNormal;

in vec4 position;
in vec3 normal;
in vec4 uv0;

void main()
{
        // Calculate output position
        gl_Position = worldViewProjMatrix * position;

        // Pass the main uvs straight through unchanged
        oUv0.xy = uv0.xy;
        oUv0.z = gl_Position.z;

        // Calculate tangent space light vector
        // Get object space light direction
        oLightDir = normalize(lightPosition.xyz - (position * lightPosition.w).xyz);

        // Calculate half-angle in tangent space
        vec3 eyeDir = normalize(eyePosition - position.xyz);
        oHalfAngle = normalize(eyeDir + oLightDir);     

        // Calculate the position of vertex in light space
        oLightPosition0 = texWorldViewProjMatrix0 * position;
        oLightPosition1 = texWorldViewProjMatrix1 * position;
        oLightPosition2 = texWorldViewProjMatrix2 * position;

        oNormal = normal;
}