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 QUAT_H_
18 
19 #define QUAT_H_
20 
21 #include "mat.h"
22 #include "vec.h"
23 
24 #ifdef __cplusplus
25 extern "C" {
26 #endif
27 
28 typedef struct Vec4 Quat;
29 
30 void initQuat(Quat *q, const struct Mat33 *R);
31 void quatToMatrix(struct Mat33 *R, const Quat *q);
32 void quatNormalize(Quat *q);
33 
34 #ifdef __cplusplus
35 }
36 #endif
37 
38 #endif  // QUAT_H_
39