20 lines
682 B
C++
20 lines
682 B
C++
#include "glm/glm.hpp"
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#include "phong_brdf.hpp"
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using glm::reflect;
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using glm::pow;
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using glm::max;
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using glm::dot;
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vec3 PhongBRDF::diffuse(vec3 light_dir, vec3 surface_normal, Ray & incident_ray, vec3 intersection_point, vec3 light_diff_color) const {
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float n_dot_l = max(dot(surface_normal, light_dir), 0.0f);
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return light_diff_color * n_dot_l;
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}
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vec3 PhongBRDF::specular(vec3 light_dir, vec3 surface_normal, Ray & incident_ray, vec3 intersection_point, vec3 light_spec_color, float shininess) const {
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vec3 ref = reflect(light_dir, surface_normal);
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float r_dot_l = pow(max(dot(ref, incident_ray.m_direction), 0.0f), shininess);
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return light_spec_color * r_dot_l;
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}
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