Can someone with good mathematical logic help me o...

# announcements

[Cyberpunk Keanu]

Can someone with good mathematical logic help me out for this?

I'm drawing two concentric circles on the screen. The smaller one has a radius startRadius and the outer larger one's radius is endRadius.
So, Now I want to get a randomly generated point, which lies in the region between the two concentric circles.

Also, is there a way to get significant distance between the previously generated random point & the newly generated random point?
I'll be adding imageviews on these points, so don't want overlapping images because the two randomly picked points are almost next to each other.

Thanks.

[Tim Malseed]

I would write a function that determines if a point lies inside a circle. Then I would test that the point falls withing the outer circle, and doesn’t fall within the inner circle

[Tim Malseed]

A point is considered inside a circle, if the distance from the center of the circle to the point is less than the radius of the circle

[Tim Malseed]

Something like:

fun isPointInCircle(point: Point, circleCenter: Point, radius: Int) : Boolean {

    return sqrt((point.x - circleCenter.x).pow(2) + (point.y - circleCenter.y).pow(2)) < radius

}

[pedro]

Assuming the centre of the circles is (0,0), and radius is r1 and r2 (r1 is smaller), generate a random value for an angle (0-360 degrees or use radians straight away as usually that’s what the drawing primitives will ask you)and generate a random value for the radius, which has to be between r1 and r2.

Now use simple trigonometry to get the (x, y) position (x = radius * cos angle; y = radius * sin angle)