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How to measure the tilt of the phone in XY plane using accelerometer in Android

由 隐身守侯 提交于 2019-11-26 12:09:18
I tried to use the Z axis data from SensorEvent.values, but it doesn't detect rotation of my phone in the XY plane, ie. around the Z-axis. I am using this as a reference for the co-ordinate axes. Is it correct? How do I measure that motion using accelerometer values? These games do something similar: Extreme Skater , Doodle Jump. PS: my phone orientation will be landscape. Essentially, there is 2 cases here: the device is laying flat and not flat. Flat here means the angle between the surface of the device screen and the world xy plane (I call it the inclination) is less than 25 degree or

Projecting 3D points to 2D plane [closed]

由 一个人想着一个人 提交于 2019-11-26 10:31:32
问题 Let A be a point for which I have the 3D coordinates x, y, z and I want to transform them into 2D coordinates: x, y. The projection shall be orthogonal on a plane defined by a given normal. The trivial case, where the normal is actually one of the axes, it\'s easy to solve, simply eliminating a coordinate, but how about the other cases, which are more likely to happen? 回答1: If you have your target point P with coordinates r_P = (x,y,z) and a plane with normal n=(nx,ny,nz) you need to define

How to measure the tilt of the phone in XY plane using accelerometer in Android

由 和自甴很熟 提交于 2019-11-26 02:31:28
问题 I tried to use the Z axis data from SensorEvent.values, but it doesn\'t detect rotation of my phone in the XY plane, ie. around the Z-axis. I am using this as a reference for the co-ordinate axes. Is it correct? How do I measure that motion using accelerometer values? These games do something similar: Extreme Skater, Doodle Jump. PS: my phone orientation will be landscape. 回答1: Essentially, there is 2 cases here: the device is laying flat and not flat. Flat here means the angle between the
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