src/jelly/PointMass.h

   1 /*
   2  * Copyright (c) 2007 Walaber
   3  * Modified by Ketmar // Invisible Vector
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a copy
   6  * of this software and associated documentation files (the "Software"), to deal
   7  * in the Software without restriction, including without limitation the rights
   8  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   9  * copies of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  21  * THE SOFTWARE.
  22  */
  23 #ifndef _POINT_MASS_H
  24 #define _POINT_MASS_H
  25
  26 #include "Vector2.h"
  27
  28
  29 namespace JellyPhysics {
  30
  31 class PointMass {
  32 public:
  33   PointMass () : Position(Vector2::Zero), Velocity(Vector2::Zero), Force(Vector2::Zero), mMass(0.0f), mInfMass(true), lastElapsed(0), lastElapMass(1)  {}
  34   PointMass (float mass, const Vector2 &pos);
  35
  36   void integrateForce (float elapsed);
  37
  38   inline float mass () const { return mMass; }
  39   inline bool isInfMass () const { return mInfMass; }
  40   void setMass (float mass);
  41
  42 public:
  43   Vector2 Position;
  44   Vector2 Velocity;
  45   Vector2 Force;
  46
  47 protected:
  48   float mMass; // DO NOT CHANGE DIRECTRY W/O CHANGING mInfMass!
  49   bool mInfMass; /* no mass/infinite mass */
  50
  51 private:
  52   float lastElapsed;
  53   float lastElapMass;
  54 };
  55
  56 }
  57
  58
  59 #endif