WallyHackenslacker/PhotonMF
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Photoning.

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Wally Hackenslacker
2017-03-28 16:58:18 -04:00
parent caad394cfa
commit 23bd4217ec
1 changed files with 13 additions and 6 deletions
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19
photon_tracer.cpp
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@@ -34,7 +34,7 @@ PhotonTracer::~PhotonTracer() { }
vec3 PhotonTracer::trace_ray(Ray & r, Scene * s, unsigned int rec_level) const { vec3 PhotonTracer::trace_ray(Ray & r, Scene * s, unsigned int rec_level) const {
float t, _t, red, green, blue, kr, radius, r1, r2; float t, _t, red, green, blue, kr, radius, r1, r2;
Figure * _f; Figure * _f;
vec3 n, color, i_pos, ref, dir_diff_color, dir_spec_color, p_contrib, sample, amb_color; vec3 n, color, i_pos, ref, dir_spec_color, p_contrib, c_contrib, sample, amb_color;
Ray mv_r, sr, rr; Ray mv_r, sr, rr;
bool vis, is_area_light; bool vis, is_area_light;
AreaLight * al; AreaLight * al;
@@ -106,7 +106,6 @@ vec3 PhotonTracer::trace_ray(Ray & r, Scene * s, unsigned int rec_level) const {
} }
// Evaluate the shading model accounting for visibility. // Evaluate the shading model accounting for visibility.
dir_diff_color += vis ? s->m_lights[l]->diffuse(n, r, i_pos, *_f->m_mat) : vec3(0.0f);
dir_spec_color += vis ? s->m_lights[l]->specular(n, r, i_pos, *_f->m_mat) : vec3(0.0f); dir_spec_color += vis ? s->m_lights[l]->specular(n, r, i_pos, *_f->m_mat) : vec3(0.0f);
} }
@@ -124,15 +123,20 @@ vec3 PhotonTracer::trace_ray(Ray & r, Scene * s, unsigned int rec_level) const {
radius *= 2; radius *= 2;
m_caustics_map.find_by_distance(caustics, i_pos, n, m_h_radius, 1000); m_caustics_map.find_by_distance(caustics, i_pos, n, m_h_radius, 1000);
} }
photons.insert(photons.end(), caustics.begin(), caustics.end()); //photons.insert(photons.end(), caustics.begin(), caustics.end());
for (Photon p : photons) { for (Photon p : photons) {
p.getColor(red, green, blue); p.getColor(red, green, blue);
p_contrib += vec3(red, green, blue); p_contrib += vec3(red, green, blue);
} }
p_contrib /= (1.0f - (2.0f / (3.0f * m_cone_filter_k))) * pi<float>() * (radius * radius); p_contrib /= (1.0f - (2.0f / (3.0f * m_cone_filter_k))) * pi<float>() * (radius * radius);
for (Photon p : caustics) {
p.getColor(red, green, blue);
c_contrib += vec3(red, green, blue);
}
c_contrib /= (1.0f - (2.0f / (3.0f * m_cone_filter_k))) * pi<float>() * (radius * radius);
// Calculate environment light contribution // Calculate environment light contribution
vis = true; vis = true;
@@ -152,7 +156,7 @@ vec3 PhotonTracer::trace_ray(Ray & r, Scene * s, unsigned int rec_level) const {
amb_color = vis ? s->m_env->get_color(rr) * max(dot(n, rr.m_direction), 0.0f) / PDF : vec3(0.0f); amb_color = vis ? s->m_env->get_color(rr) * max(dot(n, rr.m_direction), 0.0f) / PDF : vec3(0.0f);
color += (1.0f - _f->m_mat->m_rho) * (((dir_diff_color + p_contrib + amb_color) * (_f->m_mat->m_diffuse / pi<float>())) + color += (1.0f - _f->m_mat->m_rho) * (((p_contrib + c_contrib + amb_color) * (_f->m_mat->m_diffuse / pi<float>())) +
(_f->m_mat->m_specular * dir_spec_color)); (_f->m_mat->m_specular * dir_spec_color));
// Determine the specular reflection color. // Determine the specular reflection color.
@@ -358,7 +362,8 @@ void PhotonTracer::trace_photon(Photon & ph, Scene * s, const unsigned int rec_l
photon = Photon(p_pos, p_dir, red, green, blue, ph.ref_index); photon = Photon(p_pos, p_dir, red, green, blue, ph.ref_index);
m_photon_map.addPhoton(photon); m_photon_map.addPhoton(photon);
} }
// Generate a photon for diffuse reflection.
r1 = random01(); r1 = random01();
r2 = random01(); r2 = random01();
sample = sample_hemisphere(r1, r2); sample = sample_hemisphere(r1, r2);
@@ -369,9 +374,11 @@ void PhotonTracer::trace_photon(Photon & ph, Scene * s, const unsigned int rec_l
p_dir = Vec3(sample.x, sample.y, sample.z); p_dir = Vec3(sample.x, sample.y, sample.z);
photon = Photon(p_pos, p_dir, color.r, color.g, color.b, ph.ref_index); photon = Photon(p_pos, p_dir, color.r, color.g, color.b, ph.ref_index);
// Trace diffuse-reflected photon.
if (rec_level < m_max_depth) if (rec_level < m_max_depth)
trace_photon(photon, s, rec_level + 1); trace_photon(photon, s, rec_level + 1);
// Trace specular reflected photon.
if (_f->m_mat->m_rho > 0.0f && rec_level < m_max_depth) { if (_f->m_mat->m_rho > 0.0f && rec_level < m_max_depth) {
color = (_f->m_mat->m_rho) * vec3(red, green, blue); color = (_f->m_mat->m_rho) * vec3(red, green, blue);
i_pos += n * BIAS; i_pos += n * BIAS;