Android Open Source - Marble-Run Marble Compass

From Project

Back to project page Marble-Run.

License

The source code is released under:

Apache License

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Java Source Code

package nttu.edu.hud;
/*from  www . j a  v a2 s .com*/
import java.util.Random;
import nttu.edu.ball.Marble;
import nttu.edu.graphics.RenderView;
import android.graphics.Color;
import android.graphics.Paint;

public class MarbleCompass extends Compass {
  public Marble target;
  
  public MarbleCompass(Marble m) {
    super();
    setTarget(m);
  }
  
  @Override
  public void tick() {
    if (bitmap != null) {
      angle = (float) Math.toDegrees(Math.atan2(target.position[1] - RenderView.cameraY, target.position[0] - RenderView.cameraX)) + 90f;
      matrix.setScale(RenderView.AspectRatio / 2, RenderView.AspectRatio);
      matrix.postTranslate(-bitmap.getWidth() * (RenderView.AspectRatio / 2) + 8, -bitmap.getHeight() * RenderView.AspectRatio);
      matrix.postRotate(angle);
      matrix.postTranslate(position[0], position[1]);
    }
  }
  
  public void setTarget(Marble m) {
    target = m;
    paint = m.paint;
    if (paint == null) {
      Random r = new Random();
      paint = new Paint();
      paint.setColor(Color.rgb(r.nextInt(255), r.nextInt(255), r.nextInt(255)));
    }
  }
}

Java Source Code List