81 lines
2.2 KiB
C++
81 lines
2.2 KiB
C++
/* SPDX-License-Identifier: Apache-2.0
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* Copyright 2011-2022 Blender Foundation */
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#pragma once
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#include "kernel/integrator/path_state.h"
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#include "kernel/integrator/state_util.h"
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CCL_NAMESPACE_BEGIN
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/* Check whether current surface bounce is where path is to be split for the shadow catcher. */
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ccl_device_inline bool kernel_shadow_catcher_is_path_split_bounce(KernelGlobals kg,
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IntegratorState state,
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const int object_flag)
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{
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#ifdef __SHADOW_CATCHER__
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if (!kernel_data.integrator.has_shadow_catcher) {
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return false;
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}
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/* Check the flag first, avoiding fetches form global memory. */
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if ((object_flag & SD_OBJECT_SHADOW_CATCHER) == 0) {
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return false;
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}
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if (object_flag & SD_OBJECT_HOLDOUT_MASK) {
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return false;
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}
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const uint32_t path_flag = INTEGRATOR_STATE(state, path, flag);
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if ((path_flag & PATH_RAY_TRANSPARENT_BACKGROUND) == 0) {
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/* Split only on primary rays, secondary bounces are to treat shadow catcher as a regular
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* object. */
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return false;
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}
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if (path_flag & PATH_RAY_SHADOW_CATCHER_HIT) {
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return false;
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}
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return true;
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#else
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(void)object_flag;
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return false;
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#endif
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}
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/* Check whether the current path can still split. */
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ccl_device_inline bool kernel_shadow_catcher_path_can_split(KernelGlobals kg,
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ConstIntegratorState state)
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{
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if (integrator_path_is_terminated(state)) {
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return false;
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}
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const uint32_t path_flag = INTEGRATOR_STATE(state, path, flag);
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if (path_flag & PATH_RAY_SHADOW_CATCHER_HIT) {
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/* Shadow catcher was already hit and the state was split. No further split is allowed. */
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return false;
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}
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return (path_flag & PATH_RAY_TRANSPARENT_BACKGROUND) != 0;
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}
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#ifdef __SHADOW_CATCHER__
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ccl_device_forceinline bool kernel_shadow_catcher_is_matte_path(const uint32_t path_flag)
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{
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return (path_flag & PATH_RAY_SHADOW_CATCHER_HIT) == 0;
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}
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ccl_device_forceinline bool kernel_shadow_catcher_is_object_pass(const uint32_t path_flag)
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{
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return path_flag & PATH_RAY_SHADOW_CATCHER_PASS;
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}
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#endif /* __SHADOW_CATCHER__ */
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CCL_NAMESPACE_END
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