I am building an Android game where a ball is controlled and moved using the motion sensor.
There are some posts on how to draw an inverted circle like this one, but it is unusable as Android does not support BufferedImage.
I created the player using the codes below
public class Player extends Task {
private final static float MAX_SPEED = 20;
private final static float SIZE = 16;
private Circle _cir = null;
private Paint _paint = new Paint();
private Vec _vec = new Vec();
private Vec _sensorVec = new Vec();
public Player(){
_cir = new Circle( 15, 15, SIZE ); //15,15 is the initial x,y coordinates
}
public final Circle getPt(){
return _cir;
}
private void setVec(){
float x = -AcSensor.Inst().getX()*2;
float y = AcSensor.Inst().getY()*2;
_sensorVec._x = x < 0 ? -x*x : x*x;
_sensorVec._y = y < 0 ? -y*y : y*y;
_sensorVec.setLengthCap(MAX_SPEED);
_vec.blend( _sensorVec, 0.05f );
}
private void Move(){
_cir._x += _vec._x;
_cir._y += _vec._y;
}
@Override
public boolean onUpdate(){
setVec();
Move();
return true;
}
@Override
public void onDraw( Canvas c ){
c.drawCircle(_cir._x, _cir._y, _cir._r, _paint);
}
}
Question is, how to create an inverted circle around the player so that the player only sees a limited distance while the outer part is filled with black color? For example, something like this:
.