src/jelly/SpringBody.h

   1 #ifndef _SPRING_BODY_H
   2 #define _SPRING_BODY_H
   3
   4 #include "Body.h"
   5 #include "InternalSpring.h"
   6
   7
   8 namespace JellyPhysics {
   9
  10 class SpringBody : public Body {
  11 public:
  12   SpringBody (
  13     World *w, const ClosedShape &shape, float massPerPoint,
  14     float edgeSpringK, float edgeSpringDamp,
  15     const Vector2 &pos, float angleInRadians,
  16     const Vector2 &scale, bool kinematic);
  17
  18   SpringBody (
  19     World *w, const ClosedShape &shape, float massPerPoint,
  20     float shapeSpringK, float shapeSpringDamp,
  21     float edgeSpringK, float edgeSpringDamp,
  22     const Vector2 &pos, float angleinRadians,
  23     const Vector2 &scale, bool kinematic);
  24
  25   void addInternalSpring (int pointA, int pointB, float springK, float damping);
  26
  27   void clearAllSprings ();
  28
  29   void _buildDefaultSprings ();
  30
  31   void setShapeMatching (bool onoff) { mShapeMatchingOn = onoff; }
  32   void setShapeMatchingConstants (float springK, float damping) { mShapeSpringK = springK; mShapeSpringDamp = damping; }
  33
  34   void setEdgeSpringConstants (float edgeSpringK, float edgeSpringDamp);
  35   void setSpringConstants (int springID, float springK, float springDamp);
  36
  37   float getSpringK (int springID) const;
  38   float getSpringDamping (int springID) const;
  39
  40   void accumulateInternalForces ();
  41
  42 protected:
  43   typedef std::vector<InternalSpring> SpringList;
  44
  45   SpringList mSprings;
  46   bool mShapeMatchingOn;
  47   float mEdgeSpringK;
  48   float mEdgeSpringDamp;
  49   float mShapeSpringK;
  50   float mShapeSpringDamp;
  51 };
  52
  53 }
  54
  55
  56 #endif