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
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/*
* 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
/* Blend */
__device float svm_blend(float3 p, NodeBlendType type, NodeBlendAxis axis)
{
float x, y;
if(axis == NODE_BLEND_VERTICAL) {
x= p.y;
y= p.x;
}
else {
x= p.x;
y= p.y;
}
if(type == NODE_BLEND_LINEAR) {
return (1.0f + x)/2.0f;
}
else if(type == NODE_BLEND_QUADRATIC) {
float r = fmaxf((1.0f + x)/2.0f, 0.0f);
return r*r;
}
else if(type == NODE_BLEND_EASING) {
float r = fminf(fmaxf((1.0f + x)/2.0f, 0.0f), 1.0f);
float t = r*r;
return (3.0f*t - 2.0f*t*r);
}
else if(type == NODE_BLEND_DIAGONAL) {
return (2.0f + x + y)/4.0f;
}
else if(type == NODE_BLEND_RADIAL) {
return atan2(y, x)/(2.0f*M_PI_F) + 0.5f;
}
else {
float r = fmaxf(1.0f - sqrtf(x*x + y*y + p.z*p.z), 0.0f);
if(type == NODE_BLEND_QUADRATIC_SPHERE)
return r*r;
else if(type == NODE_BLEND_SPHERICAL)
return r;
}
return 0.0f;
}
__device void svm_node_tex_blend(ShaderData *sd, float *stack, uint4 node)
{
float3 co = stack_load_float3(stack, node.z);
uint type, axis;
decode_node_uchar4(node.y, &type, &axis, NULL, NULL);
float f = svm_blend(co, (NodeBlendType)type, (NodeBlendAxis)axis);
stack_store_float(stack, node.w, f);
}
CCL_NAMESPACE_END
|
