Path: chuka.playstation.co.uk!scea!peter_alau@playstation.sony.com
From: "Antony Arciuolo" <antony.arciuolo@mail.trincoll.edu>
Newsgroups: scee.yaroze.programming.2d_graphics
Subject: 2d Collision detection
Date: Wed, 7 Oct 1998 16:04:35 -0400
Organization: SCEA News Server
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I am using bounding box collision detection something to the effect of the
code listed below.
Now my problem is I got my guy scooting along at a speed of 5, so collision
appears as if
the guy is hitting a force field. Also if I slow down to 4,3,2,1 the force
field around the other object
gets smaller. How can I make so that a collision means the borders of the
bounding boxes are touching and
will be touching until the position is updated?

void WOBJECT_Update(WOBJECT *obj)
{
 short degrees, i;
 WOBJECT *obj2;

 // Handle position

 obj->oldx = obj->x;
 obj->oldy = obj->y;

 if (obj->attribute & WOBJECT_IS_MOVEABLE)
 {
  degrees = 360 - IPART(obj->currentOrientation);

  obj->x += (obj->currentSpeed * LUCos(degrees));
  obj->y -= (obj->currentSpeed * LUSin(degrees));

  for (i = 0; i < WOBJECT_ALL_COLLISION_OBJECTS; i++)
  {
   obj2 = &gAllWorldObjects[i];

   if (obj != obj2 && WOBJECT_ThereIsACollision(obj, obj2))
   {
    obj->x = obj->oldx;
    obj->y = obj->oldy;
   }
  }
 } // if should move this object
}