2011-04-27 11:58:34 +00:00
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/*
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* Copyright 2011, Blender Foundation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "kernel_differential.h"
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#include "kernel_montecarlo.h"
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#include "kernel_triangle.h"
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#include "kernel_object.h"
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#ifdef __QBVH__
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#include "kernel_qbvh.h"
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#else
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#include "kernel_bvh.h"
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#endif
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Cycles: Render Passes
Currently supported passes:
* Combined, Z, Normal, Object Index, Material Index, Emission, Environment,
Diffuse/Glossy/Transmission x Direct/Indirect/Color
Not supported yet:
* UV, Vector, Mist
Only enabled for CPU devices at the moment, will do GPU tweaks tommorrow,
also for environment importance sampling.
Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Passes
2012-01-25 17:23:52 +00:00
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#include "kernel_accumulate.h"
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2011-04-27 11:58:34 +00:00
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#include "kernel_camera.h"
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#include "kernel_shader.h"
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#include "kernel_light.h"
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#include "kernel_emission.h"
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#include "kernel_random.h"
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Cycles: Render Passes
Currently supported passes:
* Combined, Z, Normal, Object Index, Material Index, Emission, Environment,
Diffuse/Glossy/Transmission x Direct/Indirect/Color
Not supported yet:
* UV, Vector, Mist
Only enabled for CPU devices at the moment, will do GPU tweaks tommorrow,
also for environment importance sampling.
Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Passes
2012-01-25 17:23:52 +00:00
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#include "kernel_passes.h"
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2011-04-27 11:58:34 +00:00
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CCL_NAMESPACE_BEGIN
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2011-09-01 15:53:36 +00:00
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typedef struct PathState {
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uint flag;
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int bounce;
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2011-04-27 11:58:34 +00:00
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2011-09-01 15:53:36 +00:00
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int diffuse_bounce;
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int glossy_bounce;
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int transmission_bounce;
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int transparent_bounce;
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} PathState;
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__device_inline void path_state_init(PathState *state)
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{
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2011-10-16 17:54:43 +00:00
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state->flag = PATH_RAY_CAMERA|PATH_RAY_SINGULAR|PATH_RAY_MIS_SKIP;
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2011-09-01 15:53:36 +00:00
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state->bounce = 0;
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state->diffuse_bounce = 0;
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state->glossy_bounce = 0;
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state->transmission_bounce = 0;
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state->transparent_bounce = 0;
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2011-04-27 11:58:34 +00:00
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}
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2011-10-16 17:54:43 +00:00
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__device_inline void path_state_next(KernelGlobals *kg, PathState *state, int label)
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2011-04-27 11:58:34 +00:00
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{
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2011-09-01 15:53:36 +00:00
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/* ray through transparent keeps same flags from previous ray and is
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not counted as a regular bounce, transparent has separate max */
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if(label & LABEL_TRANSPARENT) {
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state->flag |= PATH_RAY_TRANSPARENT;
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state->transparent_bounce++;
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2011-10-16 17:54:43 +00:00
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if(!kernel_data.integrator.transparent_shadows)
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state->flag |= PATH_RAY_MIS_SKIP;
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2011-09-01 15:53:36 +00:00
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return;
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}
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state->bounce++;
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/* reflection/transmission */
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2011-04-27 11:58:34 +00:00
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if(label & LABEL_REFLECT) {
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2011-09-01 15:53:36 +00:00
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state->flag |= PATH_RAY_REFLECT;
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state->flag &= ~(PATH_RAY_TRANSMIT|PATH_RAY_CAMERA|PATH_RAY_TRANSPARENT);
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if(label & LABEL_DIFFUSE)
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state->diffuse_bounce++;
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else
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state->glossy_bounce++;
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2011-04-27 11:58:34 +00:00
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}
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else {
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kernel_assert(label & LABEL_TRANSMIT);
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2011-09-01 15:53:36 +00:00
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state->flag |= PATH_RAY_TRANSMIT;
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state->flag &= ~(PATH_RAY_REFLECT|PATH_RAY_CAMERA|PATH_RAY_TRANSPARENT);
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state->transmission_bounce++;
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2011-04-27 11:58:34 +00:00
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}
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/* diffuse/glossy/singular */
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if(label & LABEL_DIFFUSE) {
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2011-09-01 15:53:36 +00:00
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state->flag |= PATH_RAY_DIFFUSE;
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2011-10-16 17:54:43 +00:00
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state->flag &= ~(PATH_RAY_GLOSSY|PATH_RAY_SINGULAR|PATH_RAY_MIS_SKIP);
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2011-04-27 11:58:34 +00:00
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}
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else if(label & LABEL_GLOSSY) {
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2011-09-01 15:53:36 +00:00
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state->flag |= PATH_RAY_GLOSSY;
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2011-10-16 17:54:43 +00:00
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state->flag &= ~(PATH_RAY_DIFFUSE|PATH_RAY_SINGULAR|PATH_RAY_MIS_SKIP);
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2011-04-27 11:58:34 +00:00
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}
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else {
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2011-09-01 15:53:36 +00:00
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kernel_assert(label & LABEL_SINGULAR);
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2011-10-16 17:54:43 +00:00
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state->flag |= PATH_RAY_GLOSSY|PATH_RAY_SINGULAR|PATH_RAY_MIS_SKIP;
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2011-09-01 15:53:36 +00:00
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state->flag &= ~PATH_RAY_DIFFUSE;
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}
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}
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2011-12-21 20:51:43 +00:00
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__device_inline uint path_state_ray_visibility(KernelGlobals *kg, PathState *state)
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2011-09-01 15:53:36 +00:00
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{
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uint flag = state->flag;
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/* for visibility, diffuse/glossy are for reflection only */
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if(flag & PATH_RAY_TRANSMIT)
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flag &= ~(PATH_RAY_DIFFUSE|PATH_RAY_GLOSSY);
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2011-12-21 20:51:43 +00:00
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/* for camera visibility, use render layer flags */
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if(flag & PATH_RAY_CAMERA)
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flag |= kernel_data.integrator.layer_flag;
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2011-04-27 11:58:34 +00:00
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2011-09-01 15:53:36 +00:00
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return flag;
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}
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__device_inline float path_state_terminate_probability(KernelGlobals *kg, PathState *state, const float3 throughput)
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{
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if(state->flag & PATH_RAY_TRANSPARENT) {
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/* transparent rays treated separately */
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if(state->transparent_bounce >= kernel_data.integrator.transparent_max_bounce)
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return 0.0f;
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else if(state->transparent_bounce <= kernel_data.integrator.transparent_min_bounce)
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return 1.0f;
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2011-04-27 11:58:34 +00:00
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}
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2011-09-01 15:53:36 +00:00
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else {
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/* other rays */
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if((state->bounce >= kernel_data.integrator.max_bounce) ||
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(state->diffuse_bounce >= kernel_data.integrator.max_diffuse_bounce) ||
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(state->glossy_bounce >= kernel_data.integrator.max_glossy_bounce) ||
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(state->transmission_bounce >= kernel_data.integrator.max_transmission_bounce))
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return 0.0f;
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else if(state->bounce <= kernel_data.integrator.min_bounce)
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return 1.0f;
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}
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/* probalistic termination */
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return average(throughput);
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2011-04-27 11:58:34 +00:00
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}
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2012-02-28 16:45:08 +00:00
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__device_inline bool shadow_blocked(KernelGlobals *kg, PathState *state, Ray *ray, float3 *shadow)
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2011-09-12 13:13:56 +00:00
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{
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2012-04-15 15:35:09 +00:00
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*shadow = make_float3(1.0f, 1.0f, 1.0f);
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2011-09-12 13:13:56 +00:00
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if(ray->t == 0.0f)
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return false;
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2012-02-28 16:45:08 +00:00
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Intersection isect;
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bool result = scene_intersect(kg, ray, PATH_RAY_SHADOW_OPAQUE, &isect);
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2011-09-12 13:13:56 +00:00
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#ifdef __TRANSPARENT_SHADOWS__
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if(result && kernel_data.integrator.transparent_shadows) {
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/* transparent shadows work in such a way to try to minimize overhead
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in cases where we don't need them. after a regular shadow ray is
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cast we check if the hit primitive was potentially transparent, and
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only in that case start marching. this gives on extra ray cast for
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2011-10-16 17:54:43 +00:00
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the cases were we do want transparency.
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also note that for this to work correct, multi close sampling must
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be used, since we don't pass a random number to shader_eval_surface */
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2012-02-28 16:45:08 +00:00
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if(shader_transparent_shadow(kg, &isect)) {
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2011-09-12 13:13:56 +00:00
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float3 throughput = make_float3(1.0f, 1.0f, 1.0f);
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float3 Pend = ray->P + ray->D*ray->t;
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int bounce = state->transparent_bounce;
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for(;;) {
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if(bounce >= kernel_data.integrator.transparent_max_bounce) {
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return true;
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}
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else if(bounce >= kernel_data.integrator.transparent_min_bounce) {
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/* todo: get random number somewhere for probabilistic terminate */
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#if 0
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float probability = average(throughput);
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2011-10-16 17:54:43 +00:00
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float terminate = 0.0f;
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2011-09-12 13:13:56 +00:00
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if(terminate >= probability)
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return true;
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throughput /= probability;
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#endif
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}
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2012-02-28 16:45:08 +00:00
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if(!scene_intersect(kg, ray, PATH_RAY_SHADOW_TRANSPARENT, &isect)) {
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*shadow *= throughput;
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2011-09-12 13:13:56 +00:00
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return false;
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}
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2011-10-16 17:54:43 +00:00
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2012-02-28 16:45:08 +00:00
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if(!shader_transparent_shadow(kg, &isect))
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2011-09-12 13:13:56 +00:00
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return true;
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ShaderData sd;
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2012-02-28 16:45:08 +00:00
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shader_setup_from_ray(kg, &sd, &isect, ray);
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2011-10-16 17:54:43 +00:00
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shader_eval_surface(kg, &sd, 0.0f, PATH_RAY_SHADOW);
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2011-09-12 13:13:56 +00:00
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throughput *= shader_bsdf_transparency(kg, &sd);
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ray->P = ray_offset(sd.P, -sd.Ng);
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2011-10-16 17:54:43 +00:00
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if(ray->t != FLT_MAX)
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ray->D = normalize_len(Pend - ray->P, &ray->t);
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2011-09-12 13:13:56 +00:00
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bounce++;
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}
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}
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}
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#endif
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return result;
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}
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Cycles: Render Passes
Currently supported passes:
* Combined, Z, Normal, Object Index, Material Index, Emission, Environment,
Diffuse/Glossy/Transmission x Direct/Indirect/Color
Not supported yet:
* UV, Vector, Mist
Only enabled for CPU devices at the moment, will do GPU tweaks tommorrow,
also for environment importance sampling.
Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Passes
2012-01-25 17:23:52 +00:00
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__device float4 kernel_path_integrate(KernelGlobals *kg, RNG *rng, int sample, Ray ray, __global float *buffer)
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2011-04-27 11:58:34 +00:00
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{
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/* initialize */
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Cycles: Render Passes
Currently supported passes:
* Combined, Z, Normal, Object Index, Material Index, Emission, Environment,
Diffuse/Glossy/Transmission x Direct/Indirect/Color
Not supported yet:
* UV, Vector, Mist
Only enabled for CPU devices at the moment, will do GPU tweaks tommorrow,
also for environment importance sampling.
Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Passes
2012-01-25 17:23:52 +00:00
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PathRadiance L;
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float3 throughput = make_float3(1.0f, 1.0f, 1.0f);
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float L_transparent = 0.0f;
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path_radiance_init(&L, kernel_data.film.use_light_pass);
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2011-04-27 11:58:34 +00:00
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float ray_pdf = 0.0f;
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2011-09-01 15:53:36 +00:00
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PathState state;
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2011-04-27 11:58:34 +00:00
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int rng_offset = PRNG_BASE_NUM;
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2011-09-01 15:53:36 +00:00
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path_state_init(&state);
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2011-04-27 11:58:34 +00:00
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/* path iteration */
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2011-09-01 15:53:36 +00:00
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for(;; rng_offset += PRNG_BOUNCE_NUM) {
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2011-04-27 11:58:34 +00:00
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/* intersect scene */
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Intersection isect;
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2011-12-21 20:51:43 +00:00
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uint visibility = path_state_ray_visibility(kg, &state);
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2011-04-27 11:58:34 +00:00
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2011-09-01 15:53:36 +00:00
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if(!scene_intersect(kg, &ray, visibility, &isect)) {
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2011-04-27 11:58:34 +00:00
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/* eval background shader if nothing hit */
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2011-09-01 15:53:36 +00:00
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if(kernel_data.background.transparent && (state.flag & PATH_RAY_CAMERA)) {
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Cycles: Render Passes
Currently supported passes:
* Combined, Z, Normal, Object Index, Material Index, Emission, Environment,
Diffuse/Glossy/Transmission x Direct/Indirect/Color
Not supported yet:
* UV, Vector, Mist
Only enabled for CPU devices at the moment, will do GPU tweaks tommorrow,
also for environment importance sampling.
Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Passes
2012-01-25 17:23:52 +00:00
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L_transparent += average(throughput);
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2011-08-28 13:55:59 +00:00
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}
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2012-01-26 15:37:33 +00:00
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#ifdef __BACKGROUND__
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2011-08-28 13:55:59 +00:00
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else {
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2012-01-20 17:49:17 +00:00
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/* sample background shader */
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Cycles: Render Passes
Currently supported passes:
* Combined, Z, Normal, Object Index, Material Index, Emission, Environment,
Diffuse/Glossy/Transmission x Direct/Indirect/Color
Not supported yet:
* UV, Vector, Mist
Only enabled for CPU devices at the moment, will do GPU tweaks tommorrow,
also for environment importance sampling.
Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Passes
2012-01-25 17:23:52 +00:00
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float3 L_background = indirect_background(kg, &ray, state.flag, ray_pdf);
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path_radiance_accum_background(&L, throughput, L_background, state.bounce);
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2011-08-28 13:55:59 +00:00
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}
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2012-01-26 15:37:33 +00:00
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#endif
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2011-08-28 13:55:59 +00:00
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2011-04-27 11:58:34 +00:00
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break;
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}
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/* setup shading */
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ShaderData sd;
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shader_setup_from_ray(kg, &sd, &isect, &ray);
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2011-09-16 13:14:02 +00:00
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float rbsdf = path_rng(kg, rng, sample, rng_offset + PRNG_BSDF);
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2011-09-01 15:53:36 +00:00
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shader_eval_surface(kg, &sd, rbsdf, state.flag);
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2011-04-27 11:58:34 +00:00
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Cycles: Render Passes
Currently supported passes:
* Combined, Z, Normal, Object Index, Material Index, Emission, Environment,
Diffuse/Glossy/Transmission x Direct/Indirect/Color
Not supported yet:
* UV, Vector, Mist
Only enabled for CPU devices at the moment, will do GPU tweaks tommorrow,
also for environment importance sampling.
Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Passes
2012-01-25 17:23:52 +00:00
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kernel_write_data_passes(kg, buffer, &L, &sd, sample, state.flag, throughput);
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2011-08-28 13:55:59 +00:00
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|
|
#ifdef __HOLDOUT__
|
2011-09-01 15:53:36 +00:00
|
|
|
if((sd.flag & SD_HOLDOUT) && (state.flag & PATH_RAY_CAMERA)) {
|
2011-08-28 13:55:59 +00:00
|
|
|
float3 holdout_weight = shader_holdout_eval(kg, &sd);
|
|
|
|
|
2011-08-29 17:17:40 +00:00
|
|
|
if(kernel_data.background.transparent)
|
Cycles: Render Passes
Currently supported passes:
* Combined, Z, Normal, Object Index, Material Index, Emission, Environment,
Diffuse/Glossy/Transmission x Direct/Indirect/Color
Not supported yet:
* UV, Vector, Mist
Only enabled for CPU devices at the moment, will do GPU tweaks tommorrow,
also for environment importance sampling.
Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Passes
2012-01-25 17:23:52 +00:00
|
|
|
/* any throughput is ok, should all be identical here */
|
|
|
|
L_transparent += average(holdout_weight*throughput);
|
2011-08-28 13:55:59 +00:00
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2011-04-27 11:58:34 +00:00
|
|
|
#ifdef __EMISSION__
|
|
|
|
/* emission */
|
Cycles: Render Passes
Currently supported passes:
* Combined, Z, Normal, Object Index, Material Index, Emission, Environment,
Diffuse/Glossy/Transmission x Direct/Indirect/Color
Not supported yet:
* UV, Vector, Mist
Only enabled for CPU devices at the moment, will do GPU tweaks tommorrow,
also for environment importance sampling.
Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Passes
2012-01-25 17:23:52 +00:00
|
|
|
if(sd.flag & SD_EMISSION) {
|
|
|
|
float3 emission = indirect_emission(kg, &sd, isect.t, state.flag, ray_pdf);
|
|
|
|
path_radiance_accum_emission(&L, throughput, emission, state.bounce);
|
|
|
|
}
|
2011-09-01 15:53:36 +00:00
|
|
|
#endif
|
|
|
|
|
|
|
|
/* path termination. this is a strange place to put the termination, it's
|
|
|
|
mainly due to the mixed in MIS that we use. gives too many unneeded
|
|
|
|
shader evaluations, only need emission if we are going to terminate */
|
|
|
|
float probability = path_state_terminate_probability(kg, &state, throughput);
|
2011-09-16 13:14:02 +00:00
|
|
|
float terminate = path_rng(kg, rng, sample, rng_offset + PRNG_TERMINATE);
|
2011-04-27 11:58:34 +00:00
|
|
|
|
2011-09-01 15:53:36 +00:00
|
|
|
if(terminate >= probability)
|
|
|
|
break;
|
|
|
|
|
|
|
|
throughput /= probability;
|
|
|
|
|
2012-02-28 16:45:08 +00:00
|
|
|
#ifdef __AO__
|
|
|
|
/* ambient occlusion */
|
|
|
|
if(kernel_data.integrator.use_ambient_occlusion) {
|
|
|
|
/* todo: solve correlation */
|
|
|
|
float bsdf_u = path_rng(kg, rng, sample, rng_offset + PRNG_BSDF_U);
|
|
|
|
float bsdf_v = path_rng(kg, rng, sample, rng_offset + PRNG_BSDF_V);
|
|
|
|
|
|
|
|
float3 ao_D;
|
|
|
|
float ao_pdf;
|
|
|
|
|
|
|
|
sample_cos_hemisphere(sd.N, bsdf_u, bsdf_v, &ao_D, &ao_pdf);
|
|
|
|
|
|
|
|
if(dot(sd.Ng, ao_D) > 0.0f && ao_pdf != 0.0f) {
|
|
|
|
Ray light_ray;
|
|
|
|
float3 ao_shadow;
|
|
|
|
|
|
|
|
light_ray.P = ray_offset(sd.P, sd.Ng);
|
|
|
|
light_ray.D = ao_D;
|
|
|
|
light_ray.t = kernel_data.background.ao_distance;
|
|
|
|
|
|
|
|
if(!shadow_blocked(kg, &state, &light_ray, &ao_shadow)) {
|
|
|
|
float3 ao_bsdf = shader_bsdf_diffuse(kg, &sd)*kernel_data.background.ao_factor;
|
|
|
|
path_radiance_accum_ao(&L, throughput, ao_bsdf, ao_shadow, state.bounce);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2011-09-01 15:53:36 +00:00
|
|
|
#ifdef __EMISSION__
|
2011-09-27 20:37:24 +00:00
|
|
|
if(kernel_data.integrator.use_direct_light) {
|
2011-04-27 11:58:34 +00:00
|
|
|
/* sample illumination from lights to find path contribution */
|
2011-09-01 15:53:36 +00:00
|
|
|
if(sd.flag & SD_BSDF_HAS_EVAL) {
|
2011-09-16 13:14:02 +00:00
|
|
|
float light_t = path_rng(kg, rng, sample, rng_offset + PRNG_LIGHT);
|
|
|
|
float light_o = path_rng(kg, rng, sample, rng_offset + PRNG_LIGHT_F);
|
|
|
|
float light_u = path_rng(kg, rng, sample, rng_offset + PRNG_LIGHT_U);
|
|
|
|
float light_v = path_rng(kg, rng, sample, rng_offset + PRNG_LIGHT_V);
|
2011-04-27 11:58:34 +00:00
|
|
|
|
|
|
|
Ray light_ray;
|
Cycles: Render Passes
Currently supported passes:
* Combined, Z, Normal, Object Index, Material Index, Emission, Environment,
Diffuse/Glossy/Transmission x Direct/Indirect/Color
Not supported yet:
* UV, Vector, Mist
Only enabled for CPU devices at the moment, will do GPU tweaks tommorrow,
also for environment importance sampling.
Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Passes
2012-01-25 17:23:52 +00:00
|
|
|
BsdfEval L_light;
|
2012-03-28 10:39:21 +00:00
|
|
|
bool is_lamp;
|
2011-04-27 11:58:34 +00:00
|
|
|
|
2011-09-12 13:13:56 +00:00
|
|
|
#ifdef __MULTI_LIGHT__
|
|
|
|
/* index -1 means randomly sample from distribution */
|
|
|
|
int i = (kernel_data.integrator.num_distribution)? -1: 0;
|
2011-09-01 15:53:36 +00:00
|
|
|
|
2011-09-12 13:13:56 +00:00
|
|
|
for(; i < kernel_data.integrator.num_all_lights; i++) {
|
|
|
|
#else
|
|
|
|
const int i = -1;
|
|
|
|
#endif
|
2012-03-28 10:39:21 +00:00
|
|
|
if(direct_emission(kg, &sd, i, light_t, light_o, light_u, light_v, &light_ray, &L_light, &is_lamp)) {
|
2011-09-12 13:13:56 +00:00
|
|
|
/* trace shadow ray */
|
2012-02-28 16:45:08 +00:00
|
|
|
float3 shadow;
|
|
|
|
|
|
|
|
if(!shadow_blocked(kg, &state, &light_ray, &shadow)) {
|
|
|
|
/* accumulate */
|
2012-03-28 10:39:21 +00:00
|
|
|
path_radiance_accum_light(&L, throughput, &L_light, shadow, state.bounce, is_lamp);
|
2012-02-28 16:45:08 +00:00
|
|
|
}
|
2011-09-12 13:13:56 +00:00
|
|
|
}
|
|
|
|
#ifdef __MULTI_LIGHT__
|
2011-04-27 11:58:34 +00:00
|
|
|
}
|
2011-09-12 13:13:56 +00:00
|
|
|
#endif
|
2011-04-27 11:58:34 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2011-08-28 13:55:59 +00:00
|
|
|
/* no BSDF? we can stop here */
|
2011-09-01 15:53:36 +00:00
|
|
|
if(!(sd.flag & SD_BSDF))
|
2011-08-28 13:55:59 +00:00
|
|
|
break;
|
|
|
|
|
2011-04-27 11:58:34 +00:00
|
|
|
/* sample BSDF */
|
|
|
|
float bsdf_pdf;
|
Cycles: Render Passes
Currently supported passes:
* Combined, Z, Normal, Object Index, Material Index, Emission, Environment,
Diffuse/Glossy/Transmission x Direct/Indirect/Color
Not supported yet:
* UV, Vector, Mist
Only enabled for CPU devices at the moment, will do GPU tweaks tommorrow,
also for environment importance sampling.
Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Passes
2012-01-25 17:23:52 +00:00
|
|
|
BsdfEval bsdf_eval;
|
2011-04-27 11:58:34 +00:00
|
|
|
float3 bsdf_omega_in;
|
|
|
|
differential3 bsdf_domega_in;
|
2011-09-16 13:14:02 +00:00
|
|
|
float bsdf_u = path_rng(kg, rng, sample, rng_offset + PRNG_BSDF_U);
|
|
|
|
float bsdf_v = path_rng(kg, rng, sample, rng_offset + PRNG_BSDF_V);
|
2011-04-27 11:58:34 +00:00
|
|
|
int label;
|
|
|
|
|
|
|
|
label = shader_bsdf_sample(kg, &sd, bsdf_u, bsdf_v, &bsdf_eval,
|
|
|
|
&bsdf_omega_in, &bsdf_domega_in, &bsdf_pdf);
|
|
|
|
|
|
|
|
shader_release(kg, &sd);
|
|
|
|
|
Cycles: Render Passes
Currently supported passes:
* Combined, Z, Normal, Object Index, Material Index, Emission, Environment,
Diffuse/Glossy/Transmission x Direct/Indirect/Color
Not supported yet:
* UV, Vector, Mist
Only enabled for CPU devices at the moment, will do GPU tweaks tommorrow,
also for environment importance sampling.
Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Passes
2012-01-25 17:23:52 +00:00
|
|
|
if(bsdf_pdf == 0.0f || bsdf_eval_is_zero(&bsdf_eval))
|
2011-04-27 11:58:34 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
/* modify throughput */
|
Cycles: Render Passes
Currently supported passes:
* Combined, Z, Normal, Object Index, Material Index, Emission, Environment,
Diffuse/Glossy/Transmission x Direct/Indirect/Color
Not supported yet:
* UV, Vector, Mist
Only enabled for CPU devices at the moment, will do GPU tweaks tommorrow,
also for environment importance sampling.
Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Passes
2012-01-25 17:23:52 +00:00
|
|
|
path_radiance_bsdf_bounce(&L, &throughput, &bsdf_eval, bsdf_pdf, state.bounce, label);
|
2011-04-27 11:58:34 +00:00
|
|
|
|
|
|
|
/* set labels */
|
2012-01-31 14:57:46 +00:00
|
|
|
if(!(label & LABEL_TRANSPARENT))
|
|
|
|
ray_pdf = bsdf_pdf;
|
2011-04-27 11:58:34 +00:00
|
|
|
|
2011-09-01 15:53:36 +00:00
|
|
|
/* update path state */
|
2011-10-16 17:54:43 +00:00
|
|
|
path_state_next(kg, &state, label);
|
2011-04-27 11:58:34 +00:00
|
|
|
|
|
|
|
/* setup ray */
|
|
|
|
ray.P = ray_offset(sd.P, (label & LABEL_TRANSMIT)? -sd.Ng: sd.Ng);
|
|
|
|
ray.D = bsdf_omega_in;
|
|
|
|
ray.t = FLT_MAX;
|
|
|
|
#ifdef __RAY_DIFFERENTIALS__
|
|
|
|
ray.dP = sd.dP;
|
|
|
|
ray.dD = bsdf_domega_in;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
Cycles: Render Passes
Currently supported passes:
* Combined, Z, Normal, Object Index, Material Index, Emission, Environment,
Diffuse/Glossy/Transmission x Direct/Indirect/Color
Not supported yet:
* UV, Vector, Mist
Only enabled for CPU devices at the moment, will do GPU tweaks tommorrow,
also for environment importance sampling.
Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Passes
2012-01-25 17:23:52 +00:00
|
|
|
float3 L_sum = path_radiance_sum(&L);
|
|
|
|
|
2012-04-05 15:17:45 +00:00
|
|
|
#ifdef __CLAMP_SAMPLE__
|
|
|
|
path_radiance_clamp(&L, &L_sum, kernel_data.integrator.sample_clamp);
|
|
|
|
#endif
|
|
|
|
|
Cycles: Render Passes
Currently supported passes:
* Combined, Z, Normal, Object Index, Material Index, Emission, Environment,
Diffuse/Glossy/Transmission x Direct/Indirect/Color
Not supported yet:
* UV, Vector, Mist
Only enabled for CPU devices at the moment, will do GPU tweaks tommorrow,
also for environment importance sampling.
Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Passes
2012-01-25 17:23:52 +00:00
|
|
|
kernel_write_light_passes(kg, buffer, &L, sample);
|
|
|
|
|
|
|
|
return make_float4(L_sum.x, L_sum.y, L_sum.z, 1.0f - L_transparent);
|
2011-04-27 11:58:34 +00:00
|
|
|
}
|
|
|
|
|
Cycles: Render Passes
Currently supported passes:
* Combined, Z, Normal, Object Index, Material Index, Emission, Environment,
Diffuse/Glossy/Transmission x Direct/Indirect/Color
Not supported yet:
* UV, Vector, Mist
Only enabled for CPU devices at the moment, will do GPU tweaks tommorrow,
also for environment importance sampling.
Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Passes
2012-01-25 17:23:52 +00:00
|
|
|
__device void kernel_path_trace(KernelGlobals *kg,
|
|
|
|
__global float *buffer, __global uint *rng_state,
|
|
|
|
int sample, int x, int y, int offset, int stride)
|
2011-04-27 11:58:34 +00:00
|
|
|
{
|
Cycles: Render Passes
Currently supported passes:
* Combined, Z, Normal, Object Index, Material Index, Emission, Environment,
Diffuse/Glossy/Transmission x Direct/Indirect/Color
Not supported yet:
* UV, Vector, Mist
Only enabled for CPU devices at the moment, will do GPU tweaks tommorrow,
also for environment importance sampling.
Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Passes
2012-01-25 17:23:52 +00:00
|
|
|
/* buffer offset */
|
|
|
|
int index = offset + x + y*stride;
|
|
|
|
int pass_stride = kernel_data.film.pass_stride;
|
|
|
|
|
|
|
|
rng_state += index;
|
|
|
|
buffer += index*pass_stride;
|
|
|
|
|
2011-04-27 11:58:34 +00:00
|
|
|
/* initialize random numbers */
|
|
|
|
RNG rng;
|
|
|
|
|
|
|
|
float filter_u;
|
|
|
|
float filter_v;
|
|
|
|
|
Cycles: Render Passes
Currently supported passes:
* Combined, Z, Normal, Object Index, Material Index, Emission, Environment,
Diffuse/Glossy/Transmission x Direct/Indirect/Color
Not supported yet:
* UV, Vector, Mist
Only enabled for CPU devices at the moment, will do GPU tweaks tommorrow,
also for environment importance sampling.
Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Passes
2012-01-25 17:23:52 +00:00
|
|
|
path_rng_init(kg, rng_state, sample, &rng, x, y, &filter_u, &filter_v);
|
2011-04-27 11:58:34 +00:00
|
|
|
|
|
|
|
/* sample camera ray */
|
|
|
|
Ray ray;
|
|
|
|
|
2011-09-16 13:14:02 +00:00
|
|
|
float lens_u = path_rng(kg, &rng, sample, PRNG_LENS_U);
|
|
|
|
float lens_v = path_rng(kg, &rng, sample, PRNG_LENS_V);
|
2011-04-27 11:58:34 +00:00
|
|
|
|
|
|
|
camera_sample(kg, x, y, filter_u, filter_v, lens_u, lens_v, &ray);
|
|
|
|
|
|
|
|
/* integrate */
|
Cycles: Render Passes
Currently supported passes:
* Combined, Z, Normal, Object Index, Material Index, Emission, Environment,
Diffuse/Glossy/Transmission x Direct/Indirect/Color
Not supported yet:
* UV, Vector, Mist
Only enabled for CPU devices at the moment, will do GPU tweaks tommorrow,
also for environment importance sampling.
Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Passes
2012-01-25 17:23:52 +00:00
|
|
|
float4 L = kernel_path_integrate(kg, &rng, sample, ray, buffer);
|
2011-04-27 11:58:34 +00:00
|
|
|
|
|
|
|
/* accumulate result in output buffer */
|
Cycles: Render Passes
Currently supported passes:
* Combined, Z, Normal, Object Index, Material Index, Emission, Environment,
Diffuse/Glossy/Transmission x Direct/Indirect/Color
Not supported yet:
* UV, Vector, Mist
Only enabled for CPU devices at the moment, will do GPU tweaks tommorrow,
also for environment importance sampling.
Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Passes
2012-01-25 17:23:52 +00:00
|
|
|
kernel_write_pass_float4(buffer, sample, L);
|
2011-04-27 11:58:34 +00:00
|
|
|
|
Cycles: Render Passes
Currently supported passes:
* Combined, Z, Normal, Object Index, Material Index, Emission, Environment,
Diffuse/Glossy/Transmission x Direct/Indirect/Color
Not supported yet:
* UV, Vector, Mist
Only enabled for CPU devices at the moment, will do GPU tweaks tommorrow,
also for environment importance sampling.
Documentation:
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Passes
2012-01-25 17:23:52 +00:00
|
|
|
path_rng_end(kg, rng_state, rng);
|
2011-04-27 11:58:34 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
CCL_NAMESPACE_END
|
|
|
|
|