On Sep 12, 2012, at 1:59 PM, iQue <max.nielse...@gmail.com> wrote:
>
> thanks for taking your time to help me.
>
> It ALMOST works now, the stick acts lke imgCenterY and imgCenterX is a bit
> further down then they really are. I know I'm using the right positions cus
> if I draw a circle at that position it gets drawn in the exact middle of my
> joystickBG.
>
> this is how I add the stick: canvas.drawBitmap(joystick.get_joystick(),
> touchingPoint.x - 13, touchingPoint.y - 13,null);
> this is how I add the joystickBG:
> canvas.drawBitmap(joystick.get_joystickBg(), initx - 50, inity - 50, null);
>
> and this is the changed code:
>
> int imgCenterX = initx + joystick.get_joystickBg().getWidth()/2 -
> 50;
> int imgCenterY = inity + joystick.get_joystickBg().getHeight()/2
> - 50;
> Point imgCenter = new Point(imgCenterX, imgCenterY);
> int dx = touchingPoint.x - imgCenter.x;
> int dy = touchingPoint.y - imgCenter.y;
>
> float distance = FloatMath.sqrt(dx * dx + dy * dy);
> Log.d(TAG, "destance HERE: " + imgCenterX + " : " +
> touchingPoint.x);
>
>
> // Out of bounds check.
> final float radius = 25.0f;
> if (distance > radius) {
> touchingPoint.x = imgCenter.x + (int)(dx * radius / distance);
> touchingPoint.y = imgCenter.y + (int)(dy * radius /
> distance);
> }
>
You could try following (if I understood your coordinate system correctly);
Point imgPos = new Point(initx - 50, inity - 50);
Point imgCenter = new Point(joystick.get__joystickBg().getWidth() / 2,
joystick.get_joystickBg().getHeight() / 2);
int dx = touchingPoint.x - imgPos.x - imgCenter.x;
int dy = touchingPoint.y - imgPos.y - imgCenter.y;
float distance = FloatMath.sqrt(dx * dx + dy * dy);
Log.d(TAG, "destance HERE: " + imgCenterX + " : " + touchingPoint.x);
// Out of bounds check.
final float radius = 25.0f;
if (distance > radius) {
touchingPoint.x = imgPos.x + imgCenter.x + (int)(dx * radius /
distance);
touchingPoint.y = imgPos.y + imgCenter.y + (int)(dy * radius /
distance);
}
I can't try this out right now but hope that this provides proper distance
calculations only.
--
H
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