1 /*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #ifndef VEC_H_
18 #define VEC_H_
19
20 #include <nanohub_math.h>
21
22 #ifdef __cplusplus
23 extern "C" {
24 #endif
25
26 struct Vec3 {
27 float x, y, z;
28 };
29
30 struct Vec4 {
31 float x, y, z, w;
32 };
33
34
initVec3(struct Vec3 * v,float x,float y,float z)35 static inline void initVec3(struct Vec3 *v, float x, float y, float z) {
36 v->x = x;
37 v->y = y;
38 v->z = z;
39 }
40
vec3Add(struct Vec3 * v,const struct Vec3 * w)41 static inline void vec3Add(struct Vec3 *v, const struct Vec3 *w) {
42 v->x += w->x;
43 v->y += w->y;
44 v->z += w->z;
45 }
46
vec3Sub(struct Vec3 * v,const struct Vec3 * w)47 static inline void vec3Sub(struct Vec3 *v, const struct Vec3 *w) {
48 v->x -= w->x;
49 v->y -= w->y;
50 v->z -= w->z;
51 }
52
vec3ScalarMul(struct Vec3 * v,float c)53 static inline void vec3ScalarMul(struct Vec3 *v, float c) {
54 v->x *= c;
55 v->y *= c;
56 v->z *= c;
57 }
58
vec3Dot(const struct Vec3 * v,const struct Vec3 * w)59 static inline float vec3Dot(const struct Vec3 *v, const struct Vec3 *w) {
60 return v->x * w->x + v->y * w->y + v->z * w->z;
61 }
62
vec3NormSquared(const struct Vec3 * v)63 static inline float vec3NormSquared(const struct Vec3 *v) {
64 return vec3Dot(v, v);
65 }
66
vec3Norm(const struct Vec3 * v)67 static inline float vec3Norm(const struct Vec3 *v) {
68 return sqrtf(vec3NormSquared(v));
69 }
70
vec3Normalize(struct Vec3 * v)71 static inline void vec3Normalize(struct Vec3 *v) {
72 float invNorm = 1.0f / vec3Norm(v);
73 v->x *= invNorm;
74 v->y *= invNorm;
75 v->z *= invNorm;
76 }
77
vec3Cross(struct Vec3 * u,const struct Vec3 * v,const struct Vec3 * w)78 static inline void vec3Cross(struct Vec3 *u, const struct Vec3 *v, const struct Vec3 *w) {
79 u->x = v->y * w->z - v->z * w->y;
80 u->y = v->z * w->x - v->x * w->z;
81 u->z = v->x * w->y - v->y * w->x;
82 }
83
initVec4(struct Vec4 * v,float x,float y,float z,float w)84 static inline void initVec4(struct Vec4 *v, float x, float y, float z, float w) {
85 v->x = x;
86 v->y = y;
87 v->z = z;
88 v->w = w;
89 }
90
91
92 void findOrthogonalVector( float inX, float inY, float inZ,
93 float *outX, float *outY, float *outZ);
94
95
96 #ifdef __cplusplus
97 }
98 #endif
99
100 #endif // VEC_H_
101