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

#version 100
precision mediump int;
precision mediump float;

uniform vec4 lightDiffuse;
uniform sampler2D normalMap;

varying vec2 oUv0;
varying vec3 oTSLightDir;

// General functions

// Expand a range-compressed vector
vec3 expand(vec3 v)
{
        return (v - 0.5) * 2.0;
}

void main()
{
        // Retrieve normalised light vector, expand from range-compressed
        vec3 lightVec = normalize(oTSLightDir).xyz;

        // Get bump map vector, again expand from range-compressed
        vec3 bumpVec = expand(texture2D(normalMap, oUv0).xyz);

        // Calculate dot product
        gl_FragColor = lightDiffuse * dot(bumpVec, lightVec);
}