Hi,

a dumb question i think, but oh well..

Imagine two points A and B and its distance = 100.

I want that when distance decreases, a variable or skill should proportional increases its value and vice versa.

An example: when distance = 80 or 100 the skill must be 20 or 0 respectively and so on.

Is there a math function to do that?
Thanks in advance

The easiest solution I can think of:
Code:

---

var max_distance = 100;
var distance;
var inverse_dist;

inverse_dist = max_distance - distance;

//Examples:
distance == max_distance => inverse_dist = 0
distance = 20 => inverse_dist = 100 - 20 = 80
distance = 80 => inverse_dist = 100 - 80 = 20

---

Not sure if thats what you want though.

Code:

---

function setDist(&PointA, &PointB, maxDist, maxVal)
{
    var tDist;
    tDist = vec_dist(PointA, PointB);
    tDist = maxDist - clamp(tDist, 0, maxDist);
    tDist /= maxDist;
    return(tDist * maxVal);
}

---

PointA & PontB are the two vectors to check the distance between. maxDist is the range of distance the function should use for scaling. maxVal Is the maximum value that will be returned (when distance is close to 0). returns the end result.

ex:
setDist(my.x, you.x, 100, 25);

when the distance between the my & you entities is less than 100, the function will return a number between 0 (D = 100) and 25 (D = 0).

@ Thunder
Eh,eh so simple indeed it works now, thanks.

@ xXxGuitar511
I believe your function its what i was looking for because i need to define a min limit too, so thank you for your help, i will try that too.