I’m trying to make a color picker and need some help, I need to get an angle of a point from a center point, starting from the top moving to the left, highest value being 1 and the lowest 0, as well as distance between the two points;
I skipped math in high school so I’m at a loss, any help would be appreciated
>Solution :
to find angle between center and the point in radians:
Math.Atan2(point.y-center.y,point.x-center.x)
normalize it:
Math.Atan2(point.y-center.y,point.x-center.x)/Math.PI/2
make it start from top:
Math.Atan2(point.y-center.y,point.x-center.x)/Math.PI/2+0.25
don’t let it go below zero:
(Math.Atan2(point.y-center.y,point.x-center.x)/Math.PI/2+0.25+1)%1
invert it so it goes counterclockwise:
1-(Math.Atan2(point.y-center.y,point.x-center.x)/Math.PI/2+0.25+1)%1
you can rewrite it as:
1-(Math.Atan2(point.y-center.y,point.x-center.x)/2/Math.PI+1.25)%1