WallyHackenslacker/PhotonMF
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Reflective materials have lightning now.

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Wally Hackenslacker
2017-01-07 21:42:50 -04:00
parent d46f4abdab
commit 681fa9c823
2 changed files with 19 additions and 14 deletions
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29
path_tracer.cpp
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@@ -9,6 +9,8 @@ using namespace glm;
PathTracer::~PathTracer() { }
static const float PDF = (1.0f / (2.0f * pi<float>()));
vec3 PathTracer::trace_ray(Ray & r, vector<Figure *> & v_figures, vector<Light *> & v_lights, unsigned int rec_level) const {
float t, _t;
Figure * _f;
@@ -35,7 +37,7 @@ vec3 PathTracer::trace_ray(Ray & r, vector<Figure *> & v_figures, vector<Light *
n = _f->normal_at_int(r, t);
// Check if the material is not reflective/refractive.
if( !_f->m_mat.m_refract && _f->m_mat.m_rho == 0.0f) {
if( !_f->m_mat.m_refract) {
// Calculate the direct lighting.
for (size_t l = 0; l < v_lights.size(); l++) {
// For every light source
@@ -62,30 +64,33 @@ vec3 PathTracer::trace_ray(Ray & r, vector<Figure *> & v_figures, vector<Light *
sample = sample_hemisphere(r1, r2);
rotate_sample(sample, n);
rr = Ray(normalize(sample), i_pos + (sample * BIAS));
ind_color += r1 * trace_ray(rr, v_figures, v_lights, rec_level + 1) / (1.0f / (2.0f * pi<float>()));
ind_color += r1 * trace_ray(rr, v_figures, v_lights, rec_level + 1) / PDF;
}
color += ((dir_diff_color + ind_color) * (_f->m_mat.m_diffuse / pi<float>())) + dir_spec_color;
} else {
// If the material has reflection/transmission enabled.
// Calculate the Fresnel term if the surface is refracting.
if (_f->m_mat.m_refract)
kr = fresnel(r.m_direction, n, r.m_ref_index, _f->m_mat.m_ref_index);
else
kr = _f->m_mat.m_rho;
// Determine the specular reflection color.
if (_f->m_mat.m_rho > 0.0f && rec_level < MAX_RECURSION) {
rr = Ray(normalize(reflect(r.m_direction, n)), i_pos + n * BIAS);
color += _f->m_mat.m_rho * trace_ray(rr, v_figures, v_lights, rec_level + 1);
} else if (_f->m_mat.m_rho > 0.0f && rec_level >= MAX_RECURSION)
return vec3(0.0f);
// Determinte the specular reflection color.
} else {
// If the material has transmission enabled, calculate the Fresnel term.
kr = fresnel(r.m_direction, n, r.m_ref_index, _f->m_mat.m_ref_index);
// Determine the specular reflection color.
if (kr > 0.0f && rec_level < MAX_RECURSION) {
rr = Ray(normalize(reflect(r.m_direction, n)), i_pos + n * BIAS);
color += _f->m_mat.m_rho * kr * trace_ray(rr, v_figures, v_lights, rec_level + 1);
color += kr * trace_ray(rr, v_figures, v_lights, rec_level + 1);
} else if (rec_level >= MAX_RECURSION)
return vec3(0.0f);
// Determine the transmission color.
if (_f->m_mat.m_refract && kr < 1.0f && rec_level < MAX_RECURSION) {
rr = Ray(normalize(refract(r.m_direction, n, r.m_ref_index / _f->m_mat.m_ref_index)), i_pos - n * BIAS, _f->m_mat.m_ref_index);
color += (1.0f - _f->m_mat.m_rho) * (1.0f - kr) * trace_ray(rr, v_figures, v_lights, rec_level + 1);
color += (1.0f - kr) * trace_ray(rr, v_figures, v_lights, rec_level + 1);
} else if (rec_level >= MAX_RECURSION)
return vec3(0.0f);