varying vec3 v_positionEC;
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varying vec3 v_normalEC;
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varying vec3 v_tangentEC;
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varying vec3 v_bitangentEC;
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varying vec2 v_st;
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void main()
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{
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vec3 positionToEyeEC = -v_positionEC;
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mat3 tangentToEyeMatrix = czm_tangentToEyeSpaceMatrix(v_normalEC, v_tangentEC, v_bitangentEC);
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vec3 normalEC = normalize(v_normalEC);
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#ifdef FACE_FORWARD
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normalEC = faceforward(normalEC, vec3(0.0, 0.0, 1.0), -normalEC);
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#endif
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czm_materialInput materialInput;
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materialInput.normalEC = normalEC;
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materialInput.tangentToEyeMatrix = tangentToEyeMatrix;
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materialInput.positionToEyeEC = positionToEyeEC;
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materialInput.st = v_st;
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czm_material material = czm_getMaterial(materialInput);
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#ifdef FLAT
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gl_FragColor = vec4(material.diffuse + material.emission, material.alpha);
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#else
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gl_FragColor = czm_phong(normalize(positionToEyeEC), material, czm_lightDirectionEC);
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#endif
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}
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