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Differential D391 Diff 1231 intern/cycles/kernel/kernel_path.h

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intern/cycles/kernel/kernel_path.h

Show First 20 Lines • Show All 127 Lines • ▼ Show 20 Lines#endif
return true; return true;
} }
#endif #endif
#if defined(__BRANCHED_PATH__) || defined(__SUBSURFACE__) #if defined(__BRANCHED_PATH__) || defined(__SUBSURFACE__)
ccl_device void kernel_branched_path_integrate_direct_lighting(KernelGlobals *kg, RNG *rng,
ShaderData *sd, PathState *state, float3 throughput, float num_samples_adjust, PathRadiance *L)
{
/* sample illumination from lights to find path contribution */
if(sd->flag & SD_BSDF_HAS_EVAL) {
Ray light_ray;
BsdfEval L_light;
bool is_lamp;
#ifdef __OBJECT_MOTION__
light_ray.time = sd->time;
#endif
/* lamp sampling */
for(int i = 0; i < kernel_data.integrator.num_all_lights; i++) {
int num_samples = ceil_to_int(num_samples_adjust*light_select_num_samples(kg, i));
float num_samples_inv = num_samples_adjust/(num_samples*kernel_data.integrator.num_all_lights);
RNG lamp_rng = cmj_hash(*rng, i);
if(kernel_data.integrator.pdf_triangles != 0.0f)
num_samples_inv *= 0.5f;
for(int j = 0; j < num_samples; j++) {
float light_u, light_v;
path_branched_rng_2D(kg, &lamp_rng, state, j, num_samples, PRNG_LIGHT_U, &light_u, &light_v);
if(direct_emission(kg, sd, i, 0.0f, 0.0f, light_u, light_v, &light_ray, &L_light, &is_lamp, state->bounce)) {
/* trace shadow ray */
float3 shadow;
if(!shadow_blocked(kg, state, &light_ray, &shadow)) {
/* accumulate */
path_radiance_accum_light(L, throughput*num_samples_inv, &L_light, shadow, num_samples_inv, state->bounce, is_lamp);
}
}
}
}
/* mesh light sampling */
if(kernel_data.integrator.pdf_triangles != 0.0f) {
int num_samples = ceil_to_int(num_samples_adjust*kernel_data.integrator.mesh_light_samples);
float num_samples_inv = num_samples_adjust/num_samples;
if(kernel_data.integrator.num_all_lights)
num_samples_inv *= 0.5f;
for(int j = 0; j < num_samples; j++) {
float light_t = path_branched_rng_1D(kg, rng, state, j, num_samples, PRNG_LIGHT);
float light_u, light_v;
path_branched_rng_2D(kg, rng, state, j, num_samples, PRNG_LIGHT_U, &light_u, &light_v);
/* only sample triangle lights */
if(kernel_data.integrator.num_all_lights)
light_t = 0.5f*light_t;
if(direct_emission(kg, sd, -1, light_t, 0.0f, light_u, light_v, &light_ray, &L_light, &is_lamp, state->bounce)) {
/* trace shadow ray */
float3 shadow;
if(!shadow_blocked(kg, state, &light_ray, &shadow)) {
/* accumulate */
path_radiance_accum_light(L, throughput*num_samples_inv, &L_light, shadow, num_samples_inv, state->bounce, is_lamp);
}
}
}
}
}
}
ccl_device void kernel_path_indirect(KernelGlobals *kg, RNG *rng, Ray ray, ccl_global float *buffer, ccl_device void kernel_path_indirect(KernelGlobals *kg, RNG *rng, Ray ray, ccl_global float *buffer,
float3 throughput, int num_samples, PathState state, PathRadiance *L) float3 throughput, int num_samples, PathState state, PathRadiance *L)
{ {
/* path iteration */ /* path iteration */
for(;;) { for(;;) {
/* intersect scene */ /* intersect scene */
Intersection isect; Intersection isect;
uint visibility = path_state_ray_visibility(kg, &state); uint visibility = path_state_ray_visibility(kg, &state);
▲ Show 20 Lines • Show All 152 Lines • ▼ Show 20 Lines if(sd.flag & SD_BSSRDF) {
subsurface_scatter_step(kg, &sd, state.flag, sc, &lcg_state, bssrdf_u, bssrdf_v, false); subsurface_scatter_step(kg, &sd, state.flag, sc, &lcg_state, bssrdf_u, bssrdf_v, false);
state.flag |= PATH_RAY_BSSRDF_ANCESTOR; state.flag |= PATH_RAY_BSSRDF_ANCESTOR;
} }
} }
#endif #endif
#ifdef __EMISSION__ #ifdef __EMISSION__
if(kernel_data.integrator.use_direct_light) { if(kernel_data.integrator.use_direct_light)
/* sample illumination from lights to find path contribution */ kernel_branched_path_integrate_direct_lighting(kg, rng, &sd, &state, throughput, 1.0f, L);
if(sd.flag & SD_BSDF_HAS_EVAL) {
float light_t = path_state_rng_1D(kg, rng, &state, PRNG_LIGHT);
#ifdef __MULTI_CLOSURE__
float light_o = 0.0f;
#else
float light_o = path_state_rng_1D(kg, rng, &state, PRNG_LIGHT_F);
#endif
float light_u, light_v;
path_state_rng_2D(kg, rng, &state, PRNG_LIGHT_U, &light_u, &light_v);
Ray light_ray;
BsdfEval L_light;
bool is_lamp;
#ifdef __OBJECT_MOTION__
light_ray.time = sd.time;
#endif
/* sample random light */
if(direct_emission(kg, &sd, -1, light_t, light_o, light_u, light_v, &light_ray, &L_light, &is_lamp, state.bounce)) {
/* trace shadow ray */
float3 shadow;
if(!shadow_blocked(kg, &state, &light_ray, &shadow)) {
/* accumulate */
path_radiance_accum_light(L, throughput, &L_light, shadow, 1.0f, state.bounce, is_lamp);
}
}
}
}
#endif #endif
/* no BSDF? we can stop here */ /* no BSDF? we can stop here */
if(sd.flag & SD_BSDF) { if(sd.flag & SD_BSDF) {
/* sample BSDF */ /* sample BSDF */
float bsdf_pdf; float bsdf_pdf;
BsdfEval bsdf_eval; BsdfEval bsdf_eval;
float3 bsdf_omega_in; float3 bsdf_omega_in;
▲ Show 20 Lines • Show All 549 Lines • ▼ Show 20 Lines
#ifdef __BRANCHED_PATH__ #ifdef __BRANCHED_PATH__
ccl_device_noinline void kernel_branched_path_integrate_lighting(KernelGlobals *kg, ccl_device_noinline void kernel_branched_path_integrate_lighting(KernelGlobals *kg,
RNG *rng, ShaderData *sd, float3 throughput, float num_samples_adjust, RNG *rng, ShaderData *sd, float3 throughput, float num_samples_adjust,
PathState *state, PathRadiance *L, ccl_global float *buffer) PathState *state, PathRadiance *L, ccl_global float *buffer)
{ {
#ifdef __EMISSION__ #ifdef __EMISSION__
/* sample illumination from lights to find path contribution */ kernel_branched_path_integrate_direct_lighting(kg, rng, sd, state, throughput, num_samples_adjust, L);
if(sd->flag & SD_BSDF_HAS_EVAL) {
Ray light_ray;
BsdfEval L_light;
bool is_lamp;
#ifdef __OBJECT_MOTION__
light_ray.time = sd->time;
#endif
/* lamp sampling */
for(int i = 0; i < kernel_data.integrator.num_all_lights; i++) {
int num_samples = ceil_to_int(num_samples_adjust*light_select_num_samples(kg, i));
float num_samples_inv = num_samples_adjust/(num_samples*kernel_data.integrator.num_all_lights);
RNG lamp_rng = cmj_hash(*rng, i);
if(kernel_data.integrator.pdf_triangles != 0.0f)
num_samples_inv *= 0.5f;
for(int j = 0; j < num_samples; j++) {
float light_u, light_v;
path_branched_rng_2D(kg, &lamp_rng, state, j, num_samples, PRNG_LIGHT_U, &light_u, &light_v);
if(direct_emission(kg, sd, i, 0.0f, 0.0f, light_u, light_v, &light_ray, &L_light, &is_lamp, state->bounce)) {
/* trace shadow ray */
float3 shadow;
if(!shadow_blocked(kg, state, &light_ray, &shadow)) {
/* accumulate */
path_radiance_accum_light(L, throughput*num_samples_inv, &L_light, shadow, num_samples_inv, state->bounce, is_lamp);
}
}
}
}
/* mesh light sampling */
if(kernel_data.integrator.pdf_triangles != 0.0f) {
int num_samples = ceil_to_int(num_samples_adjust*kernel_data.integrator.mesh_light_samples);
float num_samples_inv = num_samples_adjust/num_samples;
if(kernel_data.integrator.num_all_lights)
num_samples_inv *= 0.5f;
for(int j = 0; j < num_samples; j++) {
float light_t = path_branched_rng_1D(kg, rng, state, j, num_samples, PRNG_LIGHT);
float light_u, light_v;
path_branched_rng_2D(kg, rng, state, j, num_samples, PRNG_LIGHT_U, &light_u, &light_v);
/* only sample triangle lights */
if(kernel_data.integrator.num_all_lights)
light_t = 0.5f*light_t;
if(direct_emission(kg, sd, -1, light_t, 0.0f, light_u, light_v, &light_ray, &L_light, &is_lamp, state->bounce)) {
/* trace shadow ray */
float3 shadow;
if(!shadow_blocked(kg, state, &light_ray, &shadow)) {
/* accumulate */
path_radiance_accum_light(L, throughput*num_samples_inv, &L_light, shadow, num_samples_inv, state->bounce, is_lamp);
}
}
}
}
}
#endif #endif
for(int i = 0; i< sd->num_closure; i++) { for(int i = 0; i< sd->num_closure; i++) {
const ShaderClosure *sc = &sd->closure[i]; const ShaderClosure *sc = &sd->closure[i];
if(!CLOSURE_IS_BSDF(sc->type)) if(!CLOSURE_IS_BSDF(sc->type))
continue; continue;
/* transparency is not handled here, but in outer loop */ /* transparency is not handled here, but in outer loop */
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