1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
/* SPDX-License-Identifier: Apache-2.0
* Copyright 2011-2022 Blender Foundation */
#pragma once
CCL_NAMESPACE_BEGIN
/* TODO(sergey): Think of making it more generic volume-type attribute
* sampler.
*/
ccl_device_noinline int svm_node_tex_voxel(
KernelGlobals kg, ccl_private ShaderData *sd, ccl_private float *stack, uint4 node, int offset)
{
uint co_offset, density_out_offset, color_out_offset, space;
svm_unpack_node_uchar4(node.z, &co_offset, &density_out_offset, &color_out_offset, &space);
#ifdef __VOLUME__
int id = node.y;
float3 co = stack_load_float3(stack, co_offset);
if (space == NODE_TEX_VOXEL_SPACE_OBJECT) {
co = volume_normalized_position(kg, sd, co);
}
else {
kernel_assert(space == NODE_TEX_VOXEL_SPACE_WORLD);
Transform tfm;
tfm.x = read_node_float(kg, &offset);
tfm.y = read_node_float(kg, &offset);
tfm.z = read_node_float(kg, &offset);
co = transform_point(&tfm, co);
}
float4 r = kernel_tex_image_interp_3d(kg, id, co, INTERPOLATION_NONE);
#else
float4 r = zero_float4();
#endif
if (stack_valid(density_out_offset))
stack_store_float(stack, density_out_offset, r.w);
if (stack_valid(color_out_offset))
stack_store_float3(stack, color_out_offset, make_float3(r.x, r.y, r.z));
return offset;
}
CCL_NAMESPACE_END
|
