light_fs.glsl

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/**
 * @file
 * @brief Dynamic lighting fragment shader.
 */

vec3 LightContribution(vec4 lightParams, vec3 lightDir, vec3 normal) {
   vec3 delta = lightDir;
   vec3 dir = normalize(delta);
   float NdotL = clamp(dot(normal, dir), 0.0, 1.0);

   float dist = length(delta);
   float attenDiv = max(lightParams.a * dist * dist, 0.5);
   float attenuation = 1.0 / attenDiv;

   return lightParams.rgb * NdotL * attenuation;
}

/**
 * @brief LightFragment.
 */
vec3 LightFragment(vec3 normal) {
   vec3 light = vec3(0.0);

#unroll r_dynamic_lights
   light += LightContribution(LIGHTPARAMS[$], lightDirs[$], normal);
#endunroll

   return light;
}