What is the formula for pos.distance? How can it always be below or equal to 1?

[dglaude]

I was worry about the value of pos.distance when the finger is outside of the circle.
Mostly because I use it for saturation in my colour picker.

So I added some print debug:
print(pos.x,pos.y,pos.distance)

And I get "1 1 1" as one of the possible value.
Obviously distance is not equal to sqrt(x^2+y^2)

I believe the documentation should be updated on this topic.
Anything above 1.0 seems to be rounded to 1.0.

[martinohanlon]

The formula is really simple, its the hypot of x,y - it is however, as you have said clamped to 1 - this being the radius of the dot.

https://github.com/martinohanlon/BlueDot/blob/master/bluedot/dot.py#L64

It was originally not clamped, but a number of people raised issues that it was confusing to have a distance > 1 returned.