livecodingspace-app/support/client/lib/vwf/model/cesium/Shaders/Appearances/BasicMaterialAppearanceFS.glsl

varying vec3 v_positionEC;
varying vec3 v_normalEC;

void main()
{
    vec3 positionToEyeEC = -v_positionEC; 

	vec3 normalEC;
#ifdef FACE_FORWARD
    normalEC = normalize(faceforward(v_normalEC, vec3(0.0, 0.0, 1.0), -v_normalEC));
#else
    normalEC = normalize(v_normalEC);
#endif

    czm_materialInput materialInput;
    materialInput.normalEC = normalEC;
    materialInput.positionToEyeEC = positionToEyeEC;
    czm_material material = czm_getMaterial(materialInput);
    
#ifdef FLAT    
    gl_FragColor = vec4(material.diffuse + material.emission, material.alpha);
#else
    gl_FragColor = czm_phong(normalize(positionToEyeEC), material);
#endif
}