source: data/branches/Shader_HS18/programs/Example/GLSLES/DepthShadowmapNormalMapReceiverVp.glsles @ 12091

#version 100
precision highp int;
precision highp float;

attribute vec3 tangent;
attribute vec4 position;
attribute vec3 normal;

uniform mat4 world;
uniform mat4 worldViewProj;
uniform mat4 texViewProj;
uniform vec4 lightPosition; // object space
uniform vec4 shadowDepthRange;

varying vec3 tangentLightDir;
varying vec4 vUv0;
varying vec4 vUv1;

attribute vec4 uv0;
attribute vec4 uv1;

void main()
{
        gl_Position = worldViewProj * position;
        
        vec4 worldPos = world * position;
vec4 lightPos = vec4(300.0, 750.0, -700.0, 1.0);

        // Get object space light direction 
    vec3 lightDir = normalize(lightPos.xyz -  (position.xyz * lightPos.w));

        // calculate shadow map coords
        vUv0 = texViewProj * worldPos;
#if LINEAR_RANGE
        // adjust by fixed depth bias, rescale into range
        vUv0.z = (uv0.z - shadowDepthRange.x) * shadowDepthRange.w;
#endif

        vUv1 = uv1;

        // Calculate the binormal (NB we assume both normal and tangent are 
        // already normalised) 
        vec3 binormal = cross(normal, tangent); 

        // Form a rotation matrix out of the vectors, column major for glsl es 
        mat3 rotation = mat3(vec3(tangent[0], binormal[0], normal[0]),
                                                vec3(tangent[1], binormal[1], normal[1]),
                                                vec3(tangent[2], binormal[2], normal[2]));
    
        // Transform the light vector according to this matrix 
        tangentLightDir = normalize(rotation * lightDir); 
}