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Contents
float czm_private_getLambertDiffuseOfMaterial(vec3 lightDirectionEC, czm_material material)
{
return czm_getLambertDiffuse(lightDirectionEC, material.normal);
}
float czm_private_getSpecularOfMaterial(vec3 lightDirectionEC, vec3 toEyeEC, czm_material material)
{
return czm_getSpecular(lightDirectionEC, toEyeEC, material.normal, material.shininess);
}
/**
* Computes a color using the Phong lighting model.
*
* @name czm_phong
* @glslFunction
*
* @param {vec3} toEye A normalized vector from the fragment to the eye in eye coordinates.
* @param {czm_material} material The fragment's material.
*
* @returns {vec4} The computed color.
*
* @example
* vec3 positionToEyeEC = // ...
* czm_material material = // ...
* gl_FragColor = czm_phong(normalize(positionToEyeEC), material);
*
* @see czm_getMaterial
*/
vec4 czm_phong(vec3 toEye, czm_material material)
{
// Diffuse from directional light sources at eye (for top-down and horizon views)
float diffuse = czm_private_getLambertDiffuseOfMaterial(vec3(0.0, 0.0, 1.0), material) + czm_private_getLambertDiffuseOfMaterial(vec3(0.0, 1.0, 0.0), material);
// Specular from sun and pseudo-moon
float specular = czm_private_getSpecularOfMaterial(czm_sunDirectionEC, toEye, material) + czm_private_getSpecularOfMaterial(czm_moonDirectionEC, toEye, material);
vec3 ambient = vec3(0.0);
vec3 color = ambient + material.emission;
color += material.diffuse * diffuse;
color += material.specular * specular;
return vec4(color, material.alpha);
}
vec4 czm_private_phong(vec3 toEye, czm_material material)
{
float diffuse = czm_private_getLambertDiffuseOfMaterial(czm_sunDirectionEC, material);
float specular = czm_private_getSpecularOfMaterial(czm_sunDirectionEC, toEye, material);
vec3 ambient = vec3(0.0);
vec3 color = ambient + material.emission;
color += material.diffuse * diffuse;
color += material.specular * specular;
return vec4(color, material.alpha);
}
Version data entries
6 entries across 6 versions & 1 rubygems