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
|
/*
* Copyright (C) 2018-2019 - Vito Caputo - <vcaputo@pengaru.com>
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 3 as published
* by the Free Software Foundation.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef _V3F_H
#define _V3F_H
#include <math.h>
typedef struct v3f_t {
float x, y, z;
} v3f_t;
static inline v3f_t v3f_add(const v3f_t *a, const v3f_t *b)
{
return (v3f_t){a->x + b->x, a->y + b->y, a->z + b->z};
}
static inline v3f_t * pv3f_add(const v3f_t *a, const v3f_t *b, v3f_t *res)
{
*res = v3f_add(a, b);
return res;
}
static inline v3f_t v3f_sub(const v3f_t *a, const v3f_t *b)
{
return (v3f_t){a->x - b->x, a->y - b->y, a->z - b->z};
}
static inline v3f_t * pv3f_sub(const v3f_t *a, const v3f_t *b, v3f_t *res)
{
*res = v3f_sub(a, b);
return res;
}
static inline v3f_t v3f_mult(const v3f_t *a, const v3f_t *b)
{
return (v3f_t){a->x * b->x, a->y * b->y, a->z * b->z};
}
static inline v3f_t * pv3f_mult(const v3f_t *a, const v3f_t *b, v3f_t *res)
{
*res = v3f_mult(a, b);
return res;
}
static inline v3f_t v3f_mult_scalar(const v3f_t *v, float scalar)
{
return (v3f_t){v->x * scalar, v->y * scalar, v->z * scalar};
}
static inline v3f_t * pv3f_mult_scalar(const v3f_t *v, float scalar, v3f_t *res)
{
*res = v3f_mult_scalar(v, scalar);
return res;
}
static inline v3f_t v3f_div_scalar(const v3f_t *v, float scalar)
{
return v3f_mult_scalar(v, 1.f / scalar);
}
static inline v3f_t * pv3f_div_scalar(const v3f_t *v, float scalar, v3f_t *res)
{
*res = v3f_div_scalar(v, scalar);
return res;
}
static inline float v3f_dot(const v3f_t *a, const v3f_t *b)
{
return a->x * b->x + a->y * b->y + a->z * b->z;
}
static inline float v3f_length(const v3f_t *v)
{
return sqrtf(v3f_dot(v, v));
}
static inline v3f_t v3f_normalize(const v3f_t *v)
{
return v3f_mult_scalar(v, 1.0f / v3f_length(v));
}
static inline v3f_t * pv3f_normalize(const v3f_t *v, v3f_t *res)
{
*res = v3f_normalize(v);
return res;
}
static inline v3f_t v3f_lerp(const v3f_t *a, const v3f_t *b, float t)
{
v3f_t lerp_a, lerp_b;
lerp_a = v3f_mult_scalar(a, 1.0f - t);
lerp_b = v3f_mult_scalar(b, t);
return v3f_add(&lerp_a, &lerp_b);
}
static inline v3f_t * pv3f_lerp(const v3f_t *a, const v3f_t *b, float t, v3f_t *res)
{
*res = v3f_lerp(a, b, t);
return res;
}
static inline v3f_t v3f_nlerp(const v3f_t *a, const v3f_t *b, float t)
{
v3f_t lerp = v3f_lerp(a, b, t);
return v3f_normalize(&lerp);
}
static inline v3f_t * pv3f_nlerp(const v3f_t *a, const v3f_t *b, float t, v3f_t *res)
{
*res = v3f_nlerp(a, b, t);
return res;
}
#endif
|
