b1a91c99bc
The compact form of the differential is not enough here, we need to store and use the full vectors for bump evaluation. Pull Request: https://projects.blender.org/blender/blender/pulls/112987
51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
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*
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* SPDX-License-Identifier: Apache-2.0 */
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#pragma once
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CCL_NAMESPACE_BEGIN
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/* Bump Eval Nodes */
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ccl_device_noinline void svm_node_enter_bump_eval(KernelGlobals kg,
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ccl_private ShaderData *sd,
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ccl_private float *stack,
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uint offset)
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{
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/* save state */
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stack_store_float3(stack, offset + 0, sd->P);
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stack_store_float(stack, offset + 3, sd->dP);
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/* set state as if undisplaced */
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const AttributeDescriptor desc = find_attribute(kg, sd, ATTR_STD_POSITION_UNDISPLACED);
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if (desc.offset != ATTR_STD_NOT_FOUND) {
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differential3 dP;
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float3 P = primitive_surface_attribute_float3(kg, sd, desc, &dP.dx, &dP.dy);
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object_position_transform(kg, sd, &P);
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object_dir_transform(kg, sd, &dP.dx);
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object_dir_transform(kg, sd, &dP.dy);
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sd->P = P;
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sd->dP = differential_make_compact(dP);
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/* Save the full differential, the compact form isn't enough for svm_node_set_bump. */
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stack_store_float3(stack, offset + 4, dP.dx);
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stack_store_float3(stack, offset + 7, dP.dy);
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}
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}
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ccl_device_noinline void svm_node_leave_bump_eval(KernelGlobals kg,
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ccl_private ShaderData *sd,
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ccl_private float *stack,
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uint offset)
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{
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/* restore state */
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sd->P = stack_load_float3(stack, offset + 0);
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sd->dP = stack_load_float(stack, offset + 3);
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}
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CCL_NAMESPACE_END
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