core-motion

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iPhone - understanding iPhone rotation

I am banging my head on the wall trying to understand this. See the next picture. Suppose I have an iPhone resting on a table. At this time the rotation readings thru core motion are 0,0,0 for yaw, r[详细]

2023-02-14 04:31 分类：问答
iPhone - core motion timestamp

I am using core motion on my app. I have the motionManager object assigned to a property on my main class. Something like[详细]

2023-02-12 23:10 分类：问答
How to find time and speed using iPhone's accelorometer

Let me tell you my physics is very bad. I want to calculate time between two points. The situation here is - if an object is moved from say point x to point y with an acceleration which is not constan[详细]

2023-02-12 21:33 分类：问答
Actual frequency of device motion updates lower than expected, but scales up with setting

I am porting an app that I originally wrote using the accelerometer for IOS 3, to incorporate the new IOS 4 motion capabilities.[详细]

2023-02-11 12:53 分类：问答
Core Motion in the background?

Will Core Motion fr开发者_开发技巧amework work while the app is in the background?The Core Motion framework allows access to historical data for CMPedometer data, so if your app is only using this the[详细]

2023-02-08 18:05 分类：问答
CMSampleBuffer from OpenGL for video output with AVAssestWritter

I need to get a CMSampleBuffer for the OpenGL frame. I\'m using this: int s = 1; UIScreen * screen = [UIScreen mainScreen];[详细]

2023-02-06 23:37 分类：问答
Core Motion - Convert local euler angles to another reference system

I got a problem with the maths involved in converting local Euler angles into the angles of another reference system. Lets say we have an iPhone aligned with the axis of an vehicle and I want to measu[详细]

2023-02-06 03:50 分类：问答
How to get velocity from variable accelerometer(in simple linar motion)?

I want compute the current iphone motion velocity a开发者_运维问答nytimebased on accelerometer, the accelerometer is variable. Anyone can give any idea? It\'s basically impossible.The only way is to i[详细]

2023-02-03 18:57 分类：问答
Push method for core motion and frequency of Accelerometer/Gyroscope Data

When push method is used to get accelerometer/gyroscope/device motion data, unfortunately the gyroscope and the device motion maximum frequency cannot exceed 开发者_如何学运维72Hz on average (in fact[详细]

2023-01-19 16:42 分类：问答
Attach to Property's setter

I haven\'t found similiar post so I\'m asking this. Let\'s say I defined somewhere an application wide available static Property (I mean it\'s not local) and in one class I would like to know when thi[详细]

2022-12-23 09:22 分类：问答