CODEWITHSUNDEEP
javascriptphysics
kcode
kcode

Reputation: 402

Ball collisions js formula

I understand that the collision of rectangles is calculated like this:

((a.y + a.height) < (b.top)) ||
(a.y > (b.y + b.height)) ||
((a.x + a.width) < b.x) ||
(a.x > (b.x + b.width))

I want the formula to calculate if two circles collide.

Thanks

Upvotes: 0

Views: 114

Answers (2)

Riaz Laskar
Riaz Laskar

Reputation: 1322

    // calculates distance between two points
    function distance (p0, p1) {

              var dx = p1.x - p0.x,
                  dy = p1.y - p0.y;
              return Math.sqrt(dx * dx + dy * dy);
          }

    // if the distance between the points is less then or equal to the sum of radii 
    // it returns true i.e collision else false
    function circleCollision (c0, c1) {

              return distance(c0, c1) <= c0.radius + c1.radius;
          }

Upvotes: 0

xunatai
xunatai

Reputation: 181

Calculate the distance between them. Then if the distance is less than the sum of their radii, then they collide.

Upvotes: 1

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