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我想旋转从 min3d 中的 .obj 文件解析的对象。我需要使用从传感器获得的旋转矩阵。我知道如何在纯 OpenGL 中执行此操作，但我不知道该使用什么（可能是 min3d.core.Renderer？）以及如何在 min3d 中使用。
我喜欢 min3d，它可以很好地解析 .obj 文件，所以我真的不想放弃它并使用纯 openGL。我知道我可以使用 rotate() 方法，但它使用欧拉角，我需要使用旋转矩阵。这是代码：

public class HurleyLoading extends RendererActivity implements SensorEventListener{

private Object3dContainer hurleyModel;
private SensorManager sensorManager;
private Sensor sensorAcc;
private Sensor sensorMagnetic;

 private float[] accelData = new float[3];
 private float[] magnetData = new float[3];

private final float[] rotationMatrix = new float[16];
float[] orientation = new float[3];

@Override
public void onCreate(Bundle b){
    super.onCreate(b);
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
    sensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
    sensorAcc = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
    sensorMagnetic =  sensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD);

}
public void onResume()
{
    super.onResume();
    sensorManager.registerListener(this, sensorAcc, SensorManager.SENSOR_DELAY_GAME);
    sensorManager.registerListener(this, sensorMagnetic, SensorManager.SENSOR_DELAY_GAME);
}
public void onStart()
{
    super.onStart();
    sensorManager.registerListener(this, sensorAcc, SensorManager.SENSOR_DELAY_GAME);
    sensorManager.registerListener(this, sensorMagnetic, SensorManager.SENSOR_DELAY_GAME);
    //this.onResume();
}
public void onPause()
{
    super.onPause();
    sensorManager.unregisterListener(this);
}

@Override
public void initScene() {

    scene.lights().add(new Light());
    scene.lights().add(new Light());
    scene.lights().add(new Light());
    scene.lights().add(new Light());
    scene.lights().add(new Light());
    scene.lights().add(new Light());
    scene.lights().add(new Light());

    IParser parser = Parser.createParser(Parser.Type.OBJ,
            getResources(), "ie.tyndall.hurleyopengl:raw/hurley_obj", true);
    parser.parse();

    hurleyModel = parser.getParsedObject();
    hurleyModel.scale().x = hurleyModel.scale().y =  hurleyModel.scale().z = 1.4f;
    hurleyModel.position().y = -1.8f;
    hurleyModel.position().x = .4f;

    scene.addChild(hurleyModel);        
}
@Override
public void updateScene() {
    /**some rotation code can go here but rotation() method has to use 
     * eulers angles (X/Y/Z euler rotation of object, using Euler angles. 
     * Units should be in degrees, to match OpenGL usage)which is no use for me
     * as i need to use rotation matrix
     **/        
}

//@Override
public void onAccuracyChanged(Sensor arg0, int arg1) {
    // TODO Auto-generated method stub      
}
@Override
public void onSensorChanged(SensorEvent event) {
      loadSensorData(event);
      SensorManager.getRotationMatrix(rotationMatrix, null, accelData,
                 magnetData);
}
private void loadSensorData(SensorEvent event) {
      final int type = event.sensor.getType();
      if (type == Sensor.TYPE_ACCELEROMETER) {
       accelData = event.values.clone();
      }
      if (type == Sensor.TYPE_MAGNETIC_FIELD) {
       magnetData = event.values.clone();
      }
}
}
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1 回答 1

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我认为您必须从旋转矩阵计算角度并将其设置在 updateScene() 中，如下所示： obj.rotation().x = ? obj.rotation().y = ? obj.rotation().z = ?

于 2013-09-02T12:57:40.540 回答