ea45c776fd
to replace some uses of dfdx/dfdy/differentials. No functional change expected. Pull Request: https://projects.blender.org/blender/blender/pulls/143178
57 lines
1.6 KiB
C
57 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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#include "kernel/globals.h"
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#include "kernel/geom/attribute.h"
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#include "kernel/geom/object.h"
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#include "kernel/geom/primitive.h"
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#include "kernel/svm/util.h"
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#include "kernel/util/differential.h"
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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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const 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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dual3 P = primitive_surface_attribute<float3>(kg, sd, desc, true, true);
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object_position_transform(kg, sd, &P);
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sd->P = P.val;
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sd->dP = differential_make_compact(P);
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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, P.dx);
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stack_store_float3(stack, offset + 7, P.dy);
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}
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}
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ccl_device_noinline void svm_node_leave_bump_eval(ccl_private ShaderData *sd,
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ccl_private float *stack,
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const 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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