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Hi all;

I'm make the Windows Phone Application.But I can't used to Accelerometer.

I want make this program in the Windows Phone.
http://oyunda.mynet.com/topu-kacir

Blue Ball is move with Accelerometer and I used to this code;
```if (e.X < 0 && blue_ball.Margin.Left > 0)
blue_ball.Margin = new Thickness(blue_ball.Margin.Left + e.X * 1.7, blue_ball.Margin.Top, blue_ball.Margin.Right, blue_ball.Margin.Bottom);
else if (e.X > 0 && blue_ball.Margin.Left < ContentPanel.Width - blue_ball.Width)
blue_ball.Margin = new Thickness(blue_ball.Margin.Left + e.X * 1.7, blue_ball.Margin.Top, blue_ball.Margin.Right, blue_ball.Margin.Bottom);

if (e.Y < 0 && blue_ball.Margin.Top < ContentPanel.Height - blue_ball.Height)
blue_ball.Margin = new Thickness(blue_ball.Margin.Left, blue_ball.Margin.Top + (-e.Y * 1.7), blue_ball.Margin.Right, blue_ball.Margin.Bottom);
else if (e.Y > 0 && blue_ball.Margin.Top > 0)
blue_ball.Margin = new Thickness(blue_ball.Margin.Left, blue_ball.Margin.Top + (-e.Y * 1.7), blue_ball.Margin.Right, blue_ball.Margin.Bottom);```

RedBall is move random in Grid.

How can I determine collision with Red and Blue ball?
Posted 13-Dec-12 9:10am

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## Solution 1

```private bool CheckCollision(FrameworkElement ctl1,FrameworkElement ctl2)
{
bool retval = false;
Point ptTopLeft = new Point(Convert.ToDouble(ctl1.GetValue(Canvas.LeftProperty)), Convert.ToDouble(ctl1.GetValue(Canvas.TopProperty)));
Point ptBottomRight = new Point(Convert.ToDouble(ctl1.GetValue(Canvas.LeftProperty)) + ctl1.Width, Convert.ToDouble(ctl1.GetValue(Canvas.TopProperty)) + ctl1.Height);
Rect r1 = new Rect(ptTopLeft, ptBottomRight);

//System.Diagnostics.Debug.WriteLine("+++x:" + ptTopLeft.X.ToString() + " Y " + ptTopLeft.Y.ToString() + " " + ptBottomRight.X.ToString() + " " + ptBottomRight.Y.ToString());

Point ptTopLeft2 = new Point(Convert.ToDouble(ctl2.GetValue(Canvas.LeftProperty)), Convert.ToDouble(ctl2.GetValue(Canvas.TopProperty)));

Point ptBottomRight2 = new Point(Convert.ToDouble(ctl2.GetValue(Canvas.LeftProperty)) + ctl2.Width, Convert.ToDouble(ctl2.GetValue(Canvas.TopProperty)) + ctl2.Height);

Rect r2 = new Rect(ptTopLeft2, ptBottomRight2);

r1.Intersect(r2);
if (!r1.IsEmpty)
{
retval = true;
}
return retval;
}
```

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