Is Point Within Circle

[NightElf125]

How do I do a x/y check in range of the middle of a circular region?

 

[WaterKnight]

dx²+dy² <= r²

 

[baassee]

Great WaterKnight!

 

[Dr Super Good]

dx²+dy² <= r²

I do not think this is solvable... How does one evaluate dx and dy into a representable quantity to square? Or are you implying that they are the result of double differentiation? In that case you would need to intigrate twice but I do not see how this gives you the right anwser...

The correct formula
r = radius of circle
circlex = x of midpoint of the circle
circley = y of midpoint of the circle
x = x of point to check
y = y of point to check

(x - circlex)^2 + (y - circley)^2 < r^2

 

[PurgeandFire]

yeah he meant dx and dy as in distance between x's and distance between y's.

 

[Dr Super Good]

yeah he meant dx and dy as in distance between x's and distance between y's.

I believe that is Δx and Δy.

 

[WaterKnight]

Which is spoken delta, hence the d. How do you name your dist/dif variables?

 

[Dr Super Good]

I name them normally x and y with the source ones having the extra characters. dx and dy refer to differential equation components.