Android-Action sensing technology, game programming 3D Coding

Why do we need to achieve the effect of motion sensing? This is mainly used again.AndroidIn the game, with this effect, it will make our players have a very good visual sense. Let's see how it is implemented.AndroidAction sensing.

1. DiscoveryAndroidProvidedSensorlistenerInterface

2. You must have an action sensor manager to use.Sensormanager

Java code:

1. // Obtain sensormanager
2. Sensormanager sensormgr = (sensormanager) getsystemservice (sensor_service );

3. registerSensormanager

Java code:

1. // If true is returned, the registration is successful. If flase is returned, the opposite is true.
2. Sensormgr. registerlistene (this, sensormanager. sensor_accelerometer, sensormanager. sensor_delay_game );

If you registerSensormanagerIf the call fails

Java code:

1. Sensormgr. unregisterlistener (this, sensormanager. sensor_accelerometer );

4.SensorlistenerTwo methods must be implemented

Java code:

1. Public void onaccuracychanged (INT arg0, int arg1 ){}
2. Public void onsensorchanged (INT sensor, float [] values ){}

5. Define3DCoordinates

Java code:

1. Class pos3d
2. {
3. Float X;
4. Float y;
5. Float Z;
6. }
7. Pos3d cur, last;

In MethodOnsensorchangedIn this case, data can be obtained.

Java code:

1. Cur. x = values [sensormanager. data_x];
2. Cur. Y = values [sensormanager. data_y];
3. Cur. z = values [sensormanager. data_z];
4. Float speed = math. Abs (cur. x + cur. Y + cur. Z)-(last. x + last. Y + last. z)/Interval

The following is how to judge thisSpeedWhen it is greater than a defined value

Java code:

1. If (speed> 1000)
2. {
3. // Here for processing
4. }

In this way, the most basic implementation of motion sensing, but we can certainly feel the shortcomings of this method