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
|
/*
* Copyright 2013 The Android Open Source Project
*
* 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 UI_VEC3_H
#define UI_VEC3_H
#include <stdint.h>
#include <sys/types.h>
#include <ui/vec2.h>
namespace android {
// -------------------------------------------------------------------------------------
template <typename T>
class tvec3 : public TVecProductOperators<tvec3, T>,
public TVecAddOperators<tvec3, T>,
public TVecUnaryOperators<tvec3, T>,
public TVecComparisonOperators<tvec3, T>,
public TVecFunctions<tvec3, T>
{
public:
enum no_init { NO_INIT };
typedef T value_type;
typedef T& reference;
typedef T const& const_reference;
typedef size_t size_type;
union {
struct { T x, y, z; };
struct { T s, t, p; };
struct { T r, g, b; };
Impersonator< tvec2<T> > xy;
Impersonator< tvec2<T> > st;
Impersonator< tvec2<T> > rg;
};
enum { SIZE = 3 };
inline static size_type size() { return SIZE; }
// array access
inline T const& operator [] (size_t i) const { return (&x)[i]; }
inline T& operator [] (size_t i) { return (&x)[i]; }
// -----------------------------------------------------------------------
// we don't provide copy-ctor and operator= on purpose
// because we want the compiler generated versions
// constructors
// leaves object uninitialized. use with caution.
explicit tvec3(no_init) { }
// default constructor
tvec3() : x(0), y(0), z(0) { }
// handles implicit conversion to a tvec4. must not be explicit.
template<typename A>
tvec3(A v) : x(v), y(v), z(v) { }
template<typename A, typename B, typename C>
tvec3(A x, B y, C z) : x(x), y(y), z(z) { }
template<typename A, typename B>
tvec3(const tvec2<A>& v, B z) : x(v.x), y(v.y), z(z) { }
template<typename A>
explicit tvec3(const tvec3<A>& v) : x(v.x), y(v.y), z(v.z) { }
template<typename A>
tvec3(const Impersonator< tvec3<A> >& v)
: x(((const tvec3<A>&)v).x),
y(((const tvec3<A>&)v).y),
z(((const tvec3<A>&)v).z) { }
template<typename A, typename B>
tvec3(const Impersonator< tvec2<A> >& v, B z)
: x(((const tvec2<A>&)v).x),
y(((const tvec2<A>&)v).y),
z(z) { }
// cross product works only on vectors of size 3
template <typename RT>
friend inline
tvec3 __attribute__((pure)) cross(const tvec3& u, const tvec3<RT>& v) {
return tvec3(
u.y*v.z - u.z*v.y,
u.z*v.x - u.x*v.z,
u.x*v.y - u.y*v.x);
}
};
// ----------------------------------------------------------------------------------------
typedef tvec3<float> vec3;
// ----------------------------------------------------------------------------------------
}; // namespace android
#endif /* UI_VEC4_H */
|
