2b999c6a68
These functions no longer accept NULL. They were renamed for clarity and to avoid hidden merge issues. Ref D5363
117 lines
3.4 KiB
C
117 lines
3.4 KiB
C
/*
|
|
* Copyright 2011-2013 Blender Foundation
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
CCL_NAMESPACE_BEGIN
|
|
|
|
/* Light Path Node */
|
|
|
|
ccl_device void svm_node_light_path(ShaderData *sd,
|
|
ccl_addr_space PathState *state,
|
|
float *stack,
|
|
uint type,
|
|
uint out_offset,
|
|
int path_flag)
|
|
{
|
|
float info = 0.0f;
|
|
|
|
switch (type) {
|
|
case NODE_LP_camera:
|
|
info = (path_flag & PATH_RAY_CAMERA) ? 1.0f : 0.0f;
|
|
break;
|
|
case NODE_LP_shadow:
|
|
info = (path_flag & PATH_RAY_SHADOW) ? 1.0f : 0.0f;
|
|
break;
|
|
case NODE_LP_diffuse:
|
|
info = (path_flag & PATH_RAY_DIFFUSE) ? 1.0f : 0.0f;
|
|
break;
|
|
case NODE_LP_glossy:
|
|
info = (path_flag & PATH_RAY_GLOSSY) ? 1.0f : 0.0f;
|
|
break;
|
|
case NODE_LP_singular:
|
|
info = (path_flag & PATH_RAY_SINGULAR) ? 1.0f : 0.0f;
|
|
break;
|
|
case NODE_LP_reflection:
|
|
info = (path_flag & PATH_RAY_REFLECT) ? 1.0f : 0.0f;
|
|
break;
|
|
case NODE_LP_transmission:
|
|
info = (path_flag & PATH_RAY_TRANSMIT) ? 1.0f : 0.0f;
|
|
break;
|
|
case NODE_LP_volume_scatter:
|
|
info = (path_flag & PATH_RAY_VOLUME_SCATTER) ? 1.0f : 0.0f;
|
|
break;
|
|
case NODE_LP_backfacing:
|
|
info = (sd->flag & SD_BACKFACING) ? 1.0f : 0.0f;
|
|
break;
|
|
case NODE_LP_ray_length:
|
|
info = sd->ray_length;
|
|
break;
|
|
case NODE_LP_ray_depth:
|
|
info = (float)state->bounce;
|
|
break;
|
|
case NODE_LP_ray_diffuse:
|
|
info = (float)state->diffuse_bounce;
|
|
break;
|
|
case NODE_LP_ray_glossy:
|
|
info = (float)state->glossy_bounce;
|
|
break;
|
|
case NODE_LP_ray_transparent:
|
|
info = (float)state->transparent_bounce;
|
|
break;
|
|
case NODE_LP_ray_transmission:
|
|
info = (float)state->transmission_bounce;
|
|
break;
|
|
}
|
|
|
|
stack_store_float(stack, out_offset, info);
|
|
}
|
|
|
|
/* Light Falloff Node */
|
|
|
|
ccl_device void svm_node_light_falloff(ShaderData *sd, float *stack, uint4 node)
|
|
{
|
|
uint strength_offset, out_offset, smooth_offset;
|
|
|
|
svm_unpack_node_uchar3(node.z, &strength_offset, &smooth_offset, &out_offset);
|
|
|
|
float strength = stack_load_float(stack, strength_offset);
|
|
uint type = node.y;
|
|
|
|
switch (type) {
|
|
case NODE_LIGHT_FALLOFF_QUADRATIC:
|
|
break;
|
|
case NODE_LIGHT_FALLOFF_LINEAR:
|
|
strength *= sd->ray_length;
|
|
break;
|
|
case NODE_LIGHT_FALLOFF_CONSTANT:
|
|
strength *= sd->ray_length * sd->ray_length;
|
|
break;
|
|
}
|
|
|
|
float smooth = stack_load_float(stack, smooth_offset);
|
|
|
|
if (smooth > 0.0f) {
|
|
float squared = sd->ray_length * sd->ray_length;
|
|
/* Distant lamps set the ray length to FLT_MAX, which causes squared to overflow. */
|
|
if (isfinite(squared)) {
|
|
strength *= squared / (smooth + squared);
|
|
}
|
|
}
|
|
|
|
stack_store_float(stack, out_offset, strength);
|
|
}
|
|
|
|
CCL_NAMESPACE_END
|