//This file is automatically rebuilt by the Cesium build process.
/*global define*/
define(function() {
    "use strict";
    return "varying vec3 v_positionMC;\n\
varying vec3 v_positionEC;\n\
varying vec2 v_st;\n\
\n\
void main()\n\
{\n\
    czm_materialInput materialInput;\n\
    \n\
    vec3 normalEC = normalize(czm_normal3D * czm_geodeticSurfaceNormal(v_positionMC, vec3(0.0), vec3(1.0)));\n\
#ifdef FACE_FORWARD\n\
    normalEC = faceforward(normalEC, vec3(0.0, 0.0, 1.0), -normalEC);\n\
#endif\n\
    \n\
    materialInput.s = v_st.s;\n\
    materialInput.st = v_st;\n\
    materialInput.str = vec3(v_st, 0.0);\n\
    \n\
    // Convert tangent space material normal to eye space\n\
    materialInput.normalEC = normalEC;\n\
    materialInput.tangentToEyeMatrix = czm_eastNorthUpToEyeCoordinates(v_positionMC, materialInput.normalEC);\n\
    \n\
    // Convert view vector to world space\n\
    vec3 positionToEyeEC = -v_positionEC; \n\
    materialInput.positionToEyeEC = positionToEyeEC;\n\
\n\
    czm_material material = czm_getMaterial(materialInput);\n\
    \n\
#ifdef FLAT    \n\
    gl_FragColor = vec4(material.diffuse + material.emission, material.alpha);\n\
#else\n\
    gl_FragColor = czm_phong(normalize(positionToEyeEC), material);\n\
#endif\n\
}\n\
";
});