Finding centre coordinates of a circle

[Suthers]

The formula for a circle:

(x-h)^2+(y-k)^2=r^2

(h,k) is the center

r is the radius

You will need to know the distance formula too:

d= sqrt[(x2-x1)^2+(y2-y1)^2]

p1= (x1,y1)

p2 is (x2,y2)

p1 means "first point"
p2 means "second point"




The distance between two points is the squaroot of the square of the differnce of the x values of the points minus the square of the difference of the y values of the points.

Now I will try to help you with your problem:

You can use:

trace(obj.x)

to see the object's x position and:

trace(obj.y)

to get the objects y position. This should give you a point (x,y) which should be the center of the object.

To get the center of your stage you just take the width and divide by 2 and the same with the height. All you have to do is make your object's x and y position match the stage's center