Posted by
April 25th, 2013 6:43 pm

I’m in!

Guys, I haven’t touched game coding in months.  So I’m kind of scared.  How do you do circle collision again?

But, I have some moral support from some friends who are entering along with me, so lets KICK SOME ASS


  • OSX
  • Love2D
  • SublimeText w/ vim
  • Something that draws stuff, Seashore I guess, or GIMP if I can figure out how to use it
  • Tiled
  • SFXR
  • Ableton Live
  • Coffee

This community is amazing.  Best of luck to all, and have fun!

3 Responses to “”

  1. h4tch says:

    If the distance of a point to the center of the circle is less than the circle’s radius, then the point is colliding with the circle.

  2. minism says:

    Sure! I was worrying more about calculating the vector of reflection.

  3. netguy204 says:

    P,V is the incident object (position and velocity), C is the point at the center of your circle. r is the radius of your circle.

    if (magnitude(P – C) <= r) {
    // collision, find the collision normal
    N = normalize(P – C)

    // project the velocity onto the collision normal
    Proj = dot(V, N)

    // reflect the velocity
    V = V – 2 * Proj * N

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