src/jelly/AABB.cpp

   1 #include "AABB.h"
   2
   3 namespace JellyPhysics {
   4
   5
   6 AABB::AABB (const Vector2 &minPt, const Vector2 &maxPt) {
   7   Min = minPt;
   8   Max = maxPt;
   9   Validity = Valid;
  10 }
  11
  12
  13 void AABB::clear () {
  14   Min = Max = Vector2::Zero;
  15   Validity = Invalid;
  16 }
  17
  18
  19 void AABB::expandToInclude (const Vector2 &pt) {
  20   if (Validity == Valid) {
  21     if (pt.X < Min.X) Min.X = pt.X; else if (pt.X > Max.X) Max.X = pt.X;
  22     if (pt.Y < Min.Y) Min.Y = pt.Y; else if (pt.Y > Max.Y) Max.Y = pt.Y;
  23   } else {
  24     Min = Max = pt;
  25     Validity = Valid;
  26   }
  27 }
  28
  29
  30 void AABB::expandToInclude (const AABB &aabb) {
  31   expandToInclude(aabb.Min);
  32   expandToInclude(aabb.Max);
  33 }
  34
  35
  36 bool AABB::contains (const Vector2 &pt) const {
  37   if (Validity == Invalid) return false;
  38   return (pt.X >= Min.X && pt.X <= Max.X && pt.Y >= Min.Y && pt.Y <= Max.Y);
  39 }
  40
  41
  42 bool AABB::intersects (const AABB &box)const {
  43   bool overlapX = (Min.X <= box.Max.X && Max.X >= box.Min.X);
  44   bool overlapY = (Min.Y <= box.Max.Y && Max.Y >= box.Min.Y);
  45   return (overlapX && overlapY);
  46 }
  47
  48
  49 }