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Ball friction (that time of year again?)
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Doc Flabby
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PostPosted: Sun Mar 09, 2008 12:22 pm    Post subject: Reply to topic Reply with quote

Does anyone know if the ball friction formula unique to continuum, or is it identical to the subspace one? Also at what version of continuum was the ball friction finalised? It may be worthwhile trying to rip the assembly of it, especially now as tool have been provided by snrruub to unpack the (older versions of) continuum exe.
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Smong
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PostPosted: Sun Mar 09, 2008 12:32 pm    Post subject: Reply to topic Reply with quote

I think cont has it the same or very close. It would have been in 36 since that was in use at the same time as 134/135 so they would have to at least appear to be the same.

I just tweaked my code a bit and now it's coming out within 5px of cont. Only problem is some of the collision code doesn't match exactly, so in that circle in smallmap where there are a lot of corners it occasionally bounces wrong.

Edit1: Ok I'm pretty sure about this now:
Code: Show/Hide
fireball()
{
   ball.frictiontimer = 1000000;
}

// call this per tick
updateball()
{
   if (ball.xspeed || ball.yspeed)
   {
      int workfriction = ball.frictiontimer / 1000;
      ball.xspeed = ball.xspeed * workfriction / 1000;
      ball.yspeed = ball.yspeed * workfriction / 1000;

      ball.frictiontimer -= cfg_friction;
      if (ball.frictiontimer < 0)
         ball.frictiontimer = 0;
   }
}


Edit2: fixed typo.
Edit3: fixed typo.
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