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
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
/*
* Copyright 2011-2013 Blender Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "node_noise.h"
#include "stdcycles.h"
/* Wave */
float wave(point p_input,
string type,
string bands_direction,
string rings_direction,
string profile,
float distortion,
float detail,
float dscale,
float droughness,
float phase)
{
/* Prevent precision issues on unit coordinates. */
point p = (p_input + 0.000001) * 0.999999;
float n = 0.0;
if (type == "bands") {
if (bands_direction == "x") {
n = p[0] * 20.0;
}
else if (bands_direction == "y") {
n = p[1] * 20.0;
}
else if (bands_direction == "z") {
n = p[2] * 20.0;
}
else { /* diagonal */
n = (p[0] + p[1] + p[2]) * 10.0;
}
}
else if (type == "rings") {
point rp = p;
if (rings_direction == "x") {
rp *= point(0.0, 1.0, 1.0);
}
else if (rings_direction == "y") {
rp *= point(1.0, 0.0, 1.0);
}
else if (rings_direction == "z") {
rp *= point(1.0, 1.0, 0.0);
}
/* else: "spherical" */
n = length(rp) * 20.0;
}
n += phase;
if (distortion != 0.0) {
n = n + (distortion * (fractal_noise(p * dscale, detail, droughness) * 2.0 - 1.0));
}
if (profile == "sine") {
return 0.5 + 0.5 * sin(n - M_PI_2);
}
else if (profile == "saw") {
n /= M_2PI;
return n - floor(n);
}
else { /* profile tri */
n /= M_2PI;
return abs(n - floor(n + 0.5)) * 2.0;
}
}
shader node_wave_texture(int use_mapping = 0,
matrix mapping = matrix(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
string wave_type = "bands",
string bands_direction = "x",
string rings_direction = "x",
string profile = "sine",
float Scale = 5.0,
float Distortion = 0.0,
float Detail = 2.0,
float DetailScale = 1.0,
float DetailRoughness = 0.5,
float PhaseOffset = 0.0,
point Vector = P,
output float Fac = 0.0,
output color Color = 0.0)
{
point p = Vector;
if (use_mapping)
p = transform(mapping, p);
Fac = wave(p * Scale,
wave_type,
bands_direction,
rings_direction,
profile,
Distortion,
Detail,
DetailScale,
DetailRoughness,
PhaseOffset);
Color = Fac;
}
|