layout(constant_id=auto) const bool use_occlusion_map = false;
layout(constant_id=auto) const bool use_emission = false;
layout(constant_id=auto) const bool use_emission_map = false;
-
-const float PI = 3.1415926535;
+layout(constant_id=auto) const bool use_image_based_lighting = false;
#pragma MSP stage(fragment)
virtual vec4 get_base_color()
vec3 k_spec = f0*scale_bias.x+scale_bias.y;
vec3 k_diff = (1.0-k_spec)*(1.0-metalness);
- return (k_diff*base_color+k_spec)*ambient_color.rgb;
+ if(use_image_based_lighting)
+ {
+ vec3 irradiance = get_irradiance_sample(normal);
+ vec3 reflection = get_environment_sample(reflect(look, normal), roughness).rgb;
+
+ return k_diff*irradiance*base_color+k_spec*reflection;
+ }
+ else
+ return (k_diff*base_color+k_spec)*ambient_color.rgb;
}
vec3 cooktorrance_lighting(vec3 normal, vec3 look, vec3 base_color, float metalness, float roughness)