forked from bartvdbraak/blender
3a3edc6c2d
This reverts commit 12abe94de827d9ae9c0dd6cc49bc6c3e377842ad. After a long discussion in the bug tracker we decided baking should use the faces normals for glossy (and combined). This is what Blender Internal is doing, and one of the more predictable way of yielding predictable results. That also means the result will not match the render perfectly, but this is preferrable over the alternatives at hand. Conflicts: intern/cycles/kernel/kernel_bake.h
409 lines
11 KiB
C
409 lines
11 KiB
C
/*
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* Copyright 2011-2013 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License
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*/
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CCL_NAMESPACE_BEGIN
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ccl_device void compute_light_pass(KernelGlobals *kg, ShaderData *sd, PathRadiance *L, RNG rng,
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const bool is_combined, const bool is_ao, const bool is_sss)
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{
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int samples = kernel_data.integrator.aa_samples;
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/* initialize master radiance accumulator */
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kernel_assert(kernel_data.film.use_light_pass);
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path_radiance_init(L, kernel_data.film.use_light_pass);
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/* take multiple samples */
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for(int sample = 0; sample < samples; sample++) {
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PathRadiance L_sample;
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PathState state;
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Ray ray;
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float3 throughput = make_float3(1.0f, 1.0f, 1.0f);
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bool is_sss_sample = is_sss;
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/* init radiance */
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path_radiance_init(&L_sample, kernel_data.film.use_light_pass);
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/* init path state */
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path_state_init(kg, &state, &rng, sample);
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state.num_samples = samples;
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/* evaluate surface shader */
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float rbsdf = path_state_rng_1D(kg, &rng, &state, PRNG_BSDF);
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shader_eval_surface(kg, sd, rbsdf, state.flag, SHADER_CONTEXT_MAIN);
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/* TODO, disable the closures we won't need */
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#ifdef __BRANCHED_PATH__
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if(!kernel_data.integrator.branched) {
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/* regular path tracer */
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#endif
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/* sample ambient occlusion */
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if(is_combined || is_ao) {
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kernel_path_ao(kg, sd, &L_sample, &state, &rng, throughput);
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}
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#ifdef __SUBSURFACE__
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/* sample subsurface scattering */
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if((is_combined || is_sss_sample) && (sd->flag & SD_BSSRDF)) {
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/* when mixing BSSRDF and BSDF closures we should skip BSDF lighting if scattering was successful */
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if (kernel_path_subsurface_scatter(kg, sd, &L_sample, &state, &rng, &ray, &throughput))
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is_sss_sample = true;
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}
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#endif
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/* sample light and BSDF */
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if((!is_sss_sample) && (!is_ao)) {
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if(sd->flag & SD_EMISSION) {
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float3 emission = indirect_primitive_emission(kg, sd, 0.0f, state.flag, state.ray_pdf);
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path_radiance_accum_emission(&L_sample, throughput, emission, state.bounce);
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}
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if(kernel_path_integrate_lighting(kg, &rng, sd, &throughput, &state, &L_sample, &ray)) {
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#ifdef __LAMP_MIS__
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state.ray_t = 0.0f;
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#endif
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/* compute indirect light */
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kernel_path_indirect(kg, &rng, ray, throughput, state.num_samples, state, &L_sample);
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/* sum and reset indirect light pass variables for the next samples */
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path_radiance_sum_indirect(&L_sample);
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path_radiance_reset_indirect(&L_sample);
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}
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}
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#ifdef __BRANCHED_PATH__
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}
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else {
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/* branched path tracer */
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/* sample ambient occlusion */
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if(is_combined || is_ao) {
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kernel_branched_path_ao(kg, sd, &L_sample, &state, &rng, throughput);
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}
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#ifdef __SUBSURFACE__
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/* sample subsurface scattering */
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if((is_combined || is_sss_sample) && (sd->flag & SD_BSSRDF)) {
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/* when mixing BSSRDF and BSDF closures we should skip BSDF lighting if scattering was successful */
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kernel_branched_path_subsurface_scatter(kg, sd, &L_sample, &state, &rng, throughput);
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}
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#endif
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/* sample light and BSDF */
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if((!is_sss_sample) && (!is_ao)) {
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if(sd->flag & SD_EMISSION) {
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float3 emission = indirect_primitive_emission(kg, sd, 0.0f, state.flag, state.ray_pdf);
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path_radiance_accum_emission(&L_sample, throughput, emission, state.bounce);
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}
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kernel_branched_path_integrate_lighting(kg, &rng,
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sd, throughput, 1.0f, &state, &L_sample);
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}
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}
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#endif
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/* accumulate into master L */
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path_radiance_accum_sample(L, &L_sample, samples);
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}
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}
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ccl_device bool is_light_pass(ShaderEvalType type)
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{
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switch (type) {
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case SHADER_EVAL_AO:
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case SHADER_EVAL_COMBINED:
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case SHADER_EVAL_SHADOW:
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case SHADER_EVAL_DIFFUSE_DIRECT:
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case SHADER_EVAL_GLOSSY_DIRECT:
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case SHADER_EVAL_TRANSMISSION_DIRECT:
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case SHADER_EVAL_SUBSURFACE_DIRECT:
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case SHADER_EVAL_DIFFUSE_INDIRECT:
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case SHADER_EVAL_GLOSSY_INDIRECT:
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case SHADER_EVAL_TRANSMISSION_INDIRECT:
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case SHADER_EVAL_SUBSURFACE_INDIRECT:
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return true;
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default:
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return false;
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}
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}
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ccl_device void kernel_bake_evaluate(KernelGlobals *kg, ccl_global uint4 *input, ccl_global float4 *output, ShaderEvalType type, int i)
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{
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ShaderData sd;
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uint4 in = input[i * 2];
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uint4 diff = input[i * 2 + 1];
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float3 out;
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int object = in.x;
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int prim = in.y;
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if(prim == -1)
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return;
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float u = __uint_as_float(in.z);
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float v = __uint_as_float(in.w);
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float dudx = __uint_as_float(diff.x);
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float dudy = __uint_as_float(diff.y);
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float dvdx = __uint_as_float(diff.z);
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float dvdy = __uint_as_float(diff.w);
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int shader;
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float3 P, Ng;
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triangle_point_normal(kg, prim, u, v, &P, &Ng, &shader);
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/* dummy initilizations copied from SHADER_EVAL_DISPLACE */
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float3 I = Ng;
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float t = 0.0f;
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float time = TIME_INVALID;
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int bounce = 0;
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int transparent_bounce = 0;
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/* light passes */
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PathRadiance L;
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shader_setup_from_sample(kg, &sd, P, Ng, I, shader, object, prim, u, v, t, time, bounce, transparent_bounce);
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sd.I = sd.N;
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/* update differentials */
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sd.dP.dx = sd.dPdu * dudx + sd.dPdv * dvdx;
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sd.dP.dy = sd.dPdu * dudy + sd.dPdv * dvdy;
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sd.du.dx = dudx;
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sd.du.dy = dudy;
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sd.dv.dx = dvdx;
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sd.dv.dy = dvdy;
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if(is_light_pass(type)) {
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RNG rng = cmj_hash(i, 0);
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compute_light_pass(kg, &sd, &L, rng, (type == SHADER_EVAL_COMBINED),
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(type == SHADER_EVAL_AO),
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(type == SHADER_EVAL_SUBSURFACE_DIRECT ||
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type == SHADER_EVAL_SUBSURFACE_INDIRECT));
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}
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switch (type) {
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/* data passes */
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case SHADER_EVAL_NORMAL:
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{
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/* compression: normal = (2 * color) - 1 */
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out = sd.N * 0.5f + make_float3(0.5f, 0.5f, 0.5f);
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break;
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}
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case SHADER_EVAL_UV:
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{
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out = primitive_uv(kg, &sd);
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break;
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}
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case SHADER_EVAL_DIFFUSE_COLOR:
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{
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shader_eval_surface(kg, &sd, 0.f, 0, SHADER_CONTEXT_MAIN);
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out = shader_bsdf_diffuse(kg, &sd);
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break;
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}
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case SHADER_EVAL_GLOSSY_COLOR:
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{
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shader_eval_surface(kg, &sd, 0.f, 0, SHADER_CONTEXT_MAIN);
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out = shader_bsdf_glossy(kg, &sd);
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break;
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}
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case SHADER_EVAL_TRANSMISSION_COLOR:
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{
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shader_eval_surface(kg, &sd, 0.f, 0, SHADER_CONTEXT_MAIN);
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out = shader_bsdf_transmission(kg, &sd);
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break;
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}
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case SHADER_EVAL_SUBSURFACE_COLOR:
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{
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#ifdef __SUBSURFACE__
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shader_eval_surface(kg, &sd, 0.f, 0, SHADER_CONTEXT_MAIN);
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out = shader_bsdf_subsurface(kg, &sd);
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#endif
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break;
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}
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case SHADER_EVAL_EMISSION:
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{
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shader_eval_surface(kg, &sd, 0.f, 0, SHADER_CONTEXT_EMISSION);
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out = shader_emissive_eval(kg, &sd);
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break;
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}
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#ifdef __PASSES__
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/* light passes */
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case SHADER_EVAL_AO:
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{
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out = L.ao;
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break;
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}
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case SHADER_EVAL_COMBINED:
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{
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out = path_radiance_clamp_and_sum(kg, &L);
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break;
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}
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case SHADER_EVAL_SHADOW:
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{
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out = make_float3(L.shadow.x, L.shadow.y, L.shadow.z);
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break;
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}
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case SHADER_EVAL_DIFFUSE_DIRECT:
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{
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shader_eval_surface(kg, &sd, 0.f, 0, SHADER_CONTEXT_MAIN);
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out = safe_divide_color(L.direct_diffuse, shader_bsdf_diffuse(kg, &sd));
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break;
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}
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case SHADER_EVAL_GLOSSY_DIRECT:
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{
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shader_eval_surface(kg, &sd, 0.f, 0, SHADER_CONTEXT_MAIN);
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out = safe_divide_color(L.direct_glossy, shader_bsdf_glossy(kg, &sd));
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break;
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}
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case SHADER_EVAL_TRANSMISSION_DIRECT:
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{
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shader_eval_surface(kg, &sd, 0.f, 0, SHADER_CONTEXT_MAIN);
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out = safe_divide_color(L.direct_transmission, shader_bsdf_transmission(kg, &sd));
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break;
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}
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case SHADER_EVAL_SUBSURFACE_DIRECT:
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{
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#ifdef __SUBSURFACE__
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shader_eval_surface(kg, &sd, 0.f, 0, SHADER_CONTEXT_MAIN);
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out = safe_divide_color(L.direct_subsurface, shader_bsdf_subsurface(kg, &sd));
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#endif
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break;
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}
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case SHADER_EVAL_DIFFUSE_INDIRECT:
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{
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shader_eval_surface(kg, &sd, 0.f, 0, SHADER_CONTEXT_MAIN);
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out = safe_divide_color(L.indirect_diffuse, shader_bsdf_diffuse(kg, &sd));
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break;
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}
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case SHADER_EVAL_GLOSSY_INDIRECT:
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{
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shader_eval_surface(kg, &sd, 0.f, 0, SHADER_CONTEXT_MAIN);
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out = safe_divide_color(L.indirect_glossy, shader_bsdf_glossy(kg, &sd));
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break;
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}
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case SHADER_EVAL_TRANSMISSION_INDIRECT:
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{
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shader_eval_surface(kg, &sd, 0.f, 0, SHADER_CONTEXT_MAIN);
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out = safe_divide_color(L.indirect_transmission, shader_bsdf_transmission(kg, &sd));
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break;
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}
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case SHADER_EVAL_SUBSURFACE_INDIRECT:
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{
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#ifdef __SUBSURFACE__
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shader_eval_surface(kg, &sd, 0.f, 0, SHADER_CONTEXT_MAIN);
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out = safe_divide_color(L.indirect_subsurface, shader_bsdf_subsurface(kg, &sd));
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#endif
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break;
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}
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#endif
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/* extra */
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case SHADER_EVAL_ENVIRONMENT:
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{
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/* setup ray */
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Ray ray;
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ray.P = make_float3(0.0f, 0.0f, 0.0f);
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ray.D = normalize(P);
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ray.t = 0.0f;
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#ifdef __CAMERA_MOTION__
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ray.time = 0.5f;
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#endif
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#ifdef __RAY_DIFFERENTIALS__
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ray.dD = differential3_zero();
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ray.dP = differential3_zero();
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#endif
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/* setup shader data */
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shader_setup_from_background(kg, &sd, &ray, 0, 0);
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/* evaluate */
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int flag = 0; /* we can't know which type of BSDF this is for */
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out = shader_eval_background(kg, &sd, flag, SHADER_CONTEXT_MAIN);
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break;
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}
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default:
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{
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/* no real shader, returning the position of the verts for debugging */
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out = normalize(P);
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break;
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}
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}
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/* write output */
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output[i] = make_float4(out.x, out.y, out.z, 1.0f);
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return;
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}
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ccl_device void kernel_shader_evaluate(KernelGlobals *kg, ccl_global uint4 *input, ccl_global float4 *output, ShaderEvalType type, int i)
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{
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ShaderData sd;
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uint4 in = input[i];
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float3 out;
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if(type == SHADER_EVAL_DISPLACE) {
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/* setup shader data */
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int object = in.x;
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int prim = in.y;
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float u = __uint_as_float(in.z);
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float v = __uint_as_float(in.w);
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shader_setup_from_displace(kg, &sd, object, prim, u, v);
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/* evaluate */
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float3 P = sd.P;
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shader_eval_displacement(kg, &sd, SHADER_CONTEXT_MAIN);
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out = sd.P - P;
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}
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else { // SHADER_EVAL_BACKGROUND
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/* setup ray */
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Ray ray;
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float u = __uint_as_float(in.x);
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float v = __uint_as_float(in.y);
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ray.P = make_float3(0.0f, 0.0f, 0.0f);
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ray.D = equirectangular_to_direction(u, v);
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ray.t = 0.0f;
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#ifdef __CAMERA_MOTION__
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ray.time = 0.5f;
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#endif
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#ifdef __RAY_DIFFERENTIALS__
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ray.dD = differential3_zero();
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ray.dP = differential3_zero();
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#endif
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/* setup shader data */
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shader_setup_from_background(kg, &sd, &ray, 0, 0);
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/* evaluate */
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int flag = 0; /* we can't know which type of BSDF this is for */
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out = shader_eval_background(kg, &sd, flag, SHADER_CONTEXT_MAIN);
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}
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/* write output */
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output[i] = make_float4(out.x, out.y, out.z, 0.0f);
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}
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CCL_NAMESPACE_END
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