Moving a Ball on iPhone

Posted by Chandan Shetty SP on Stack Overflow See other posts from Stack Overflow or by Chandan Shetty SP
Published on 2010-03-24T05:46:39Z Indexed on 2010/03/24 5:53 UTC
Read the original article Hit count: 270

Filed under:

iphone

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objective-c

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physics

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math

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animation

I am using below formula to move the ball circular, where accelX and accelY are the values from accelerometer, it is working fine. But the problem in this code is mRadius(I fixed its value to 50), i need to change mRadius according to accelerometer values and also i need bouncing effect when it touches other circles please send your answers ASAP... I am waiting.

float degrees = -atan2(accelX, accelY) * 180 / 3.14159; int x = cCentrePoint.x + mRadius * cos(degreesToRadians(degrees)); int y = cCentrePoint.y + mRadius * sin(degreesToRadians(degrees));

Here is the snap of the game i want to develop. http://iphront.com/wp-content/uploads/2009/12/bdece528ea334033.jpg.jpg

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