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
|
/*
* Copyright 2011-2018 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.
*/
#ifndef __UTIL_PROJECTION_H__
#define __UTIL_PROJECTION_H__
#include "util/util_transform.h"
CCL_NAMESPACE_BEGIN
/* Data Types */
typedef struct ProjectionTransform {
float4 x, y, z, w; /* rows */
#ifndef __KERNEL_GPU__
ProjectionTransform()
{
}
explicit ProjectionTransform(const Transform& tfm)
: x(tfm.x),
y(tfm.y),
z(tfm.z),
w(tfm.w)
{
}
#endif
} ProjectionTransform;
typedef struct PerspectiveMotionTransform {
ProjectionTransform pre;
ProjectionTransform post;
} PerspectiveMotionTransform;
/* Functions */
ccl_device_inline float3 transform_perspective(const ProjectionTransform *t, const float3 a)
{
float4 b = make_float4(a.x, a.y, a.z, 1.0f);
float3 c = make_float3(dot(t->x, b), dot(t->y, b), dot(t->z, b));
float w = dot(t->w, b);
return (w != 0.0f)? c/w: make_float3(0.0f, 0.0f, 0.0f);
}
ccl_device_inline float3 transform_perspective_direction(const ProjectionTransform *t, const float3 a)
{
float3 c = make_float3(
a.x*t->x.x + a.y*t->x.y + a.z*t->x.z,
a.x*t->y.x + a.y*t->y.y + a.z*t->y.z,
a.x*t->z.x + a.y*t->z.y + a.z*t->z.z);
return c;
}
#ifndef __KERNEL_GPU__
ccl_device_inline ProjectionTransform projection_transpose(const ProjectionTransform& a)
{
ProjectionTransform t;
t.x.x = a.x.x; t.x.y = a.y.x; t.x.z = a.z.x; t.x.w = a.w.x;
t.y.x = a.x.y; t.y.y = a.y.y; t.y.z = a.z.y; t.y.w = a.w.y;
t.z.x = a.x.z; t.z.y = a.y.z; t.z.z = a.z.z; t.z.w = a.w.z;
t.w.x = a.x.w; t.w.y = a.y.w; t.w.z = a.z.w; t.w.w = a.w.w;
return t;
}
ccl_device_inline ProjectionTransform projection_inverse(const ProjectionTransform& a)
{
Transform t = {a.x, a.y, a.z, a.w};
t = transform_inverse(t);
return ProjectionTransform(t);
}
ccl_device_inline ProjectionTransform make_projection(
float a, float b, float c, float d,
float e, float f, float g, float h,
float i, float j, float k, float l,
float m, float n, float o, float p)
{
ProjectionTransform t;
t.x.x = a; t.x.y = b; t.x.z = c; t.x.w = d;
t.y.x = e; t.y.y = f; t.y.z = g; t.y.w = h;
t.z.x = i; t.z.y = j; t.z.z = k; t.z.w = l;
t.w.x = m; t.w.y = n; t.w.z = o; t.w.w = p;
return t;
}
ccl_device_inline ProjectionTransform projection_identity()
{
return make_projection(
1.0f, 0.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f);
}
ccl_device_inline ProjectionTransform operator*(const ProjectionTransform& a, const ProjectionTransform& b)
{
ProjectionTransform c = projection_transpose(b);
ProjectionTransform t;
t.x = make_float4(dot(a.x, c.x), dot(a.x, c.y), dot(a.x, c.z), dot(a.x, c.w));
t.y = make_float4(dot(a.y, c.x), dot(a.y, c.y), dot(a.y, c.z), dot(a.y, c.w));
t.z = make_float4(dot(a.z, c.x), dot(a.z, c.y), dot(a.z, c.z), dot(a.z, c.w));
t.w = make_float4(dot(a.w, c.x), dot(a.w, c.y), dot(a.w, c.z), dot(a.w, c.w));
return t;
}
ccl_device_inline ProjectionTransform operator*(const ProjectionTransform& a, const Transform& b)
{
return a * ProjectionTransform(b);
}
ccl_device_inline ProjectionTransform operator*(const Transform& a, const ProjectionTransform& b)
{
return ProjectionTransform(a) * b;
}
ccl_device_inline void print_projection(const char *label, const ProjectionTransform& t)
{
print_float4(label, t.x);
print_float4(label, t.y);
print_float4(label, t.z);
print_float4(label, t.w);
printf("\n");
}
ccl_device_inline ProjectionTransform projection_perspective(float fov, float n, float f)
{
ProjectionTransform persp = make_projection(
1, 0, 0, 0,
0, 1, 0, 0,
0, 0, f / (f - n), -f*n / (f - n),
0, 0, 1, 0);
float inv_angle = 1.0f/tanf(0.5f*fov);
Transform scale = transform_scale(inv_angle, inv_angle, 1);
return scale * persp;
}
ccl_device_inline ProjectionTransform projection_orthographic(float znear, float zfar)
{
Transform t =
transform_scale(1.0f, 1.0f, 1.0f / (zfar-znear)) *
transform_translate(0.0f, 0.0f, -znear);
return ProjectionTransform(t);
}
#endif /* __KERNEL_GPU__ */
CCL_NAMESPACE_END
#endif /* __UTIL_PROJECTION_H__ */
|
