I'm a Chinese and sorry about my English is not good . That is my problem: How can I get two angel? angel 1. angel between device surface and the level angel 2. azimuth of device surface (azimuth of the projection of device surface normal vector)
I read the document on developer.android.com which part about class Sensor.Event , and have several questions. 1. Is sensor of type TYPE_ORIENTATION really physically exist ? In the document , it told me that :"use getRotationMatrix() in conjunction with remapCoordinateSystem() and getOrientation() to compute these values instead." (this is it http://developer.android.com/reference/android/hardware/Sensor.html#TYPE_ORIENTATION ) Since I can compute the orientation values by other two sensor values , why is there a redundant sensor exist? 2. I need to compute the normal vector of device surface? I want to get the angel between device surface and the level . In my mind , I put device in the world coordinate system : Y point to North , X point to East , Z point to sky Then for the two angel I want , I only need to get the normal vector of device surface . 3. How can I get the normal vector? Whether I use sensor of type TYPE_ORIENTATION or use getRotationMatrix() plus getOrientation() , the values I can get are Azimuth Pitch and Roll ( differences are only on sign and 3 angels is in degree or radian ). I tried several different way to rotation vector (0,0,1) with this 3 angels to get the normal vector , but all of them seems do not work .Help me , make is work please. T T Thank in advance. -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
