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CoreMotion 加速器陀螺仪

时间:2017-08-21 16:35:10      阅读:208      评论:0      收藏:0      [点我收藏+]

标签:imp   name   new   手机   解决   根据   class   init   gravity   

初始化CoreMotion

 

#import <CoreMotion/CoreMotion.h>
CMMotionManager *motionManager = [[CMMotionManager alloc]init];

1. Accelerometer 获取手机加速度数据

CMAccelerometerData *newestAccel = motionManager.accelerometerData;
double accelerationX = newestAccel.acceleration.x;
double accelerationY = newestAccel.acceleration.y; 
double accelerationZ = newestAccel.acceleration.z;

2. Gravity 获取手机的重力值在各个方向上的分量,根据这个就可以获得手机的空间位置,倾斜角度等


double gravityX = motionManager.deviceMotion.gravity.x;
double gravityY = motionManager.deviceMotion.gravity.y; 
double gravityZ = motionManager.deviceMotion.gravity.z;

3.获取手机的倾斜角度:

double zTheta = atan2(gravityZ,sqrtf(gravityX*gravityX+gravityY*gravityY))/M_PI*180.0; 
double xyTheta = atan2(gravityX,gravityY)/M_PI*180.0;
zTheta是手机与水平面的夹角, xyTheta是手机绕自身旋转的角度
4. DeviceMotion 获取陀螺仪的数据 包括角速度,空间位置等
//旋转角速度:

CMRotationRate rotationRate = motionManager.deviceMotion.rotationRate;
double rotationX = rotationRate.x;
double rotationY = rotationRate.y;
double rotationZ = rotationRate.z;

5.空间位置的欧拉角(通过欧拉角可以算得手机两个时刻之间的夹角,比用角速度计算精确地多)


double roll = motionManager.deviceMotion.attitude.roll; 
double pitch = motionManager.deviceMotion.attitude.pitch; 
double yaw = motionManager.deviceMotion.attitude.yaw;

 

6.空间位置的四元数(与欧拉角类似,但解决了万向结死锁问题)

double w = motionManager.deviceMotion.attitude.quaternion.w;
double wx = motionManager.deviceMotion.attitude.quaternion.x; 
double wy = motionManager.deviceMotion.attitude.quaternion.y; 
double wz = motionManager.deviceMotion.attitude.quaternion.z;

CoreMotion 加速器陀螺仪

标签:imp   name   new   手机   解决   根据   class   init   gravity   

原文地址:http://www.cnblogs.com/yang-shuai/p/7404933.html

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