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
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
/*
* 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.
*/
CCL_NAMESPACE_BEGIN
/* The following offset functions generate random offsets to be added to texture
* coordinates to act as a seed since the noise functions don't have seed values.
* A seed value is needed for generating distortion textures and color outputs.
* The offset's components are in the range [100, 200], not too high to cause
* bad precision and not to small to be noticeable. We use float seed because
* OSL only support float hashes.
*/
ccl_device_inline float random_float_offset(float seed)
{
return 100.0f + hash_float_to_float(seed) * 100.0f;
}
ccl_device_inline float2 random_float2_offset(float seed)
{
return make_float2(100.0f + hash_float2_to_float(make_float2(seed, 0.0f)) * 100.0f,
100.0f + hash_float2_to_float(make_float2(seed, 1.0f)) * 100.0f);
}
ccl_device_inline float3 random_float3_offset(float seed)
{
return make_float3(100.0f + hash_float2_to_float(make_float2(seed, 0.0f)) * 100.0f,
100.0f + hash_float2_to_float(make_float2(seed, 1.0f)) * 100.0f,
100.0f + hash_float2_to_float(make_float2(seed, 2.0f)) * 100.0f);
}
ccl_device_inline float4 random_float4_offset(float seed)
{
return make_float4(100.0f + hash_float2_to_float(make_float2(seed, 0.0f)) * 100.0f,
100.0f + hash_float2_to_float(make_float2(seed, 1.0f)) * 100.0f,
100.0f + hash_float2_to_float(make_float2(seed, 2.0f)) * 100.0f,
100.0f + hash_float2_to_float(make_float2(seed, 3.0f)) * 100.0f);
}
ccl_device void noise_texture_1d(
float co, float detail, float distortion, bool color_is_needed, float *value, float3 *color)
{
float p = co;
if (distortion != 0.0f) {
p += snoise_1d(p + random_float_offset(0.0f)) * distortion;
}
*value = fractal_noise_1d(p, detail);
if (color_is_needed) {
*color = make_float3(*value,
fractal_noise_1d(p + random_float_offset(1.0f), detail),
fractal_noise_1d(p + random_float_offset(2.0f), detail));
}
}
ccl_device void noise_texture_2d(
float2 co, float detail, float distortion, bool color_is_needed, float *value, float3 *color)
{
float2 p = co;
if (distortion != 0.0f) {
p += make_float2(snoise_2d(p + random_float2_offset(0.0f)) * distortion,
snoise_2d(p + random_float2_offset(1.0f)) * distortion);
}
*value = fractal_noise_2d(p, detail);
if (color_is_needed) {
*color = make_float3(*value,
fractal_noise_2d(p + random_float2_offset(2.0f), detail),
fractal_noise_2d(p + random_float2_offset(3.0f), detail));
}
}
ccl_device void noise_texture_3d(
float3 co, float detail, float distortion, bool color_is_needed, float *value, float3 *color)
{
float3 p = co;
if (distortion != 0.0f) {
p += make_float3(snoise_3d(p + random_float3_offset(0.0f)) * distortion,
snoise_3d(p + random_float3_offset(1.0f)) * distortion,
snoise_3d(p + random_float3_offset(2.0f)) * distortion);
}
*value = fractal_noise_3d(p, detail);
if (color_is_needed) {
*color = make_float3(*value,
fractal_noise_3d(p + random_float3_offset(3.0f), detail),
fractal_noise_3d(p + random_float3_offset(4.0f), detail));
}
}
ccl_device void noise_texture_4d(
float4 co, float detail, float distortion, bool color_is_needed, float *value, float3 *color)
{
float4 p = co;
if (distortion != 0.0f) {
p += make_float4(snoise_4d(p + random_float4_offset(0.0f)) * distortion,
snoise_4d(p + random_float4_offset(1.0f)) * distortion,
snoise_4d(p + random_float4_offset(2.0f)) * distortion,
snoise_4d(p + random_float4_offset(3.0f)) * distortion);
}
*value = fractal_noise_4d(p, detail);
if (color_is_needed) {
*color = make_float3(*value,
fractal_noise_4d(p + random_float4_offset(4.0f), detail),
fractal_noise_4d(p + random_float4_offset(5.0f), detail));
}
}
ccl_device void svm_node_tex_noise(KernelGlobals *kg,
ShaderData *sd,
float *stack,
uint dimensions,
uint offsets1,
uint offsets2,
int *offset)
{
uint vector_stack_offset, w_stack_offset, scale_stack_offset, detail_stack_offset;
uint distortion_stack_offset, value_stack_offset, color_stack_offset;
svm_unpack_node_uchar4(
offsets1, &vector_stack_offset, &w_stack_offset, &scale_stack_offset, &detail_stack_offset);
svm_unpack_node_uchar3(
offsets2, &distortion_stack_offset, &value_stack_offset, &color_stack_offset);
uint4 defaults = read_node(kg, offset);
float3 vector = stack_load_float3(stack, vector_stack_offset);
float w = stack_load_float_default(stack, w_stack_offset, defaults.x);
float scale = stack_load_float_default(stack, scale_stack_offset, defaults.y);
float detail = stack_load_float_default(stack, detail_stack_offset, defaults.z);
float distortion = stack_load_float_default(stack, distortion_stack_offset, defaults.w);
vector *= scale;
w *= scale;
float value;
float3 color;
switch (dimensions) {
case 1:
noise_texture_1d(w, detail, distortion, stack_valid(color_stack_offset), &value, &color);
break;
case 2:
noise_texture_2d(make_float2(vector.x, vector.y),
detail,
distortion,
stack_valid(color_stack_offset),
&value,
&color);
break;
case 3:
noise_texture_3d(
vector, detail, distortion, stack_valid(color_stack_offset), &value, &color);
break;
case 4:
noise_texture_4d(make_float4(vector.x, vector.y, vector.z, w),
detail,
distortion,
stack_valid(color_stack_offset),
&value,
&color);
break;
default:
kernel_assert(0);
}
if (stack_valid(value_stack_offset)) {
stack_store_float(stack, value_stack_offset, value);
}
if (stack_valid(color_stack_offset)) {
stack_store_float3(stack, color_stack_offset, color);
}
}
CCL_NAMESPACE_END
|
