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
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
/*
* Copyright 2011, Blender Foundation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
CCL_NAMESPACE_BEGIN
/* Voronoi */
__device_noinline float4 svm_voronoi(NodeVoronoiColoring coloring, float scale, float3 p)
{
/* compute distance and point coordinate of 4 nearest neighbours */
float da[4];
float3 pa[4];
voronoi(p*scale, NODE_VORONOI_DISTANCE_SQUARED, 1.0f, da, pa);
/* output */
float fac;
float3 color;
if(coloring == NODE_VORONOI_INTENSITY) {
fac = fabsf(da[0]);
color = make_float3(fac, fac, fac);
}
else {
color = cellnoise_color(pa[0]);
fac= average(color);
}
return make_float4(color.x, color.y, color.z, fac);
}
__device void svm_node_tex_voronoi(KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node, int *offset)
{
uint coloring = node.y;
uint scale_offset, co_offset, fac_offset, color_offset;
decode_node_uchar4(node.z, &scale_offset, &co_offset, &fac_offset, &color_offset);
float3 co = stack_load_float3(stack, co_offset);
float scale = stack_load_float_default(stack, scale_offset, node.w);
float4 result = svm_voronoi((NodeVoronoiColoring)coloring, scale, co);
float3 color = make_float3(result.x, result.y, result.z);
float f = result.w;
if(stack_valid(fac_offset)) stack_store_float(stack, fac_offset, f);
if(stack_valid(color_offset)) stack_store_float3(stack, color_offset, color);
}
CCL_NAMESPACE_END
|
