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Message:

Center of Attention

Posted by Matt Gerrans on December 26, 2001 at 6:18 PM

> I have many shape objects. I need to find the centre of the shape object.
> ...
> Is there any mathematical formula to do it. [?]

Yes, there is a mathematical formula, but it kind of requires that the shape also be described by a mathematical formula.

If you have arbitrary shapes, then one simple trick is to just calculate the average position (x & y) of all the pixels inside the bounds of a particular shape. That would give you the weighted center. For this, the base shape object should have a contains(x,y) type method that allows you to test whether a given pixel is in the shape's region or not.

• centre in any shape - Java2D + Center of Attention vijayv December 28, 2001 at 6:00 AM (1)
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