src/world/AABB.cpp

   1 #include "AABB.h"
   2
   3 #include "Collision.h"
   4
   5
   6 namespace orbi {
   7
   8 bool AABB::Intersects(const AABB &other, Collision &coll) const {
   9         if (Bottom() < other.Top()) return false;
  10         if (other.Bottom() < Top()) return false;
  11         if (Right() < other.Left()) return false;
  12         if (other.Right() < Left()) return false;
  13
  14         AABB diff;
  15         diff.lt = max(lt, other.lt);
  16         diff.rb = min(rb, other.rb);
  17         const Vector<float> sdiff = diff.Size();
  18
  19         if (sdiff.x < sdiff.y) {
  20                 coll.pos.y = diff.Center().y;
  21                 coll.norm.y = 0;
  22                 coll.depth.y = 0;
  23                 if (Center().x < other.Center().x) {
  24                         coll.pos.x = Right();
  25                         coll.norm.x = -1;
  26                         coll.depth.x = other.Left() - Right();
  27                 } else {
  28                         coll.pos.x = Left();
  29                         coll.norm.x = 1;
  30                         coll.depth.x = other.Right() - Left();
  31                 }
  32         } else {
  33                 coll.pos.x = diff.Center().x;
  34                 coll.norm.x = 0;
  35                 coll.depth.x = 0;
  36                 if (Center().y < other.Center().y) {
  37                         coll.pos.y = Bottom();
  38                         coll.norm.y = -1;
  39                         coll.depth.y = other.Top() - Bottom();
  40                 } else {
  41                         coll.pos.y = Top();
  42                         coll.norm.y = 1;
  43                         coll.depth.y = other.Bottom() - Top();
  44                 }
  45         }
  46         return true;
  47 }
  48
  49 }