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/* SPDX-License-Identifier: Apache-2.0
* Copyright 2011-2022 Blender Foundation */
#pragma once
CCL_NAMESPACE_BEGIN
/* Bump Eval Nodes */
ccl_device_noinline void svm_node_enter_bump_eval(KernelGlobals kg,
ccl_private ShaderData *sd,
ccl_private float *stack,
uint offset)
{
/* save state */
stack_store_float3(stack, offset + 0, sd->P);
stack_store_float(stack, offset + 3, sd->dP);
/* set state as if undisplaced */
const AttributeDescriptor desc = find_attribute(kg, sd, ATTR_STD_POSITION_UNDISPLACED);
if (desc.offset != ATTR_STD_NOT_FOUND) {
differential3 dP;
float3 P = primitive_surface_attribute_float3(kg, sd, desc, &dP.dx, &dP.dy);
object_position_transform(kg, sd, &P);
object_dir_transform(kg, sd, &dP.dx);
object_dir_transform(kg, sd, &dP.dy);
sd->P = P;
sd->dP = differential_make_compact(dP);
}
}
ccl_device_noinline void svm_node_leave_bump_eval(KernelGlobals kg,
ccl_private ShaderData *sd,
ccl_private float *stack,
uint offset)
{
/* restore state */
sd->P = stack_load_float3(stack, offset + 0);
sd->dP = stack_load_float(stack, offset + 3);
}
CCL_NAMESPACE_END
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