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// Geometric Tools, LLC
// Copyright (c) 1998-2014
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt
// http://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
//
// File Version: 5.0.0 (2010/01/01)
#ifndef PHYSICSMODULE_H
#define PHYSICSMODULE_H
class PhysicsModule
{
public:
// Construction and destruction.
PhysicsModule ();
~PhysicsModule ();
// Initialize the numerical solver.
void Initialize (double time, double deltaTime, double y1, double dy1,
double dy3);
// Apply a single step of the solver.
void Update ();
// The gravitational constant.
double Gravity;
// The left mass in Figure 3.13.
double Mass1;
// The right mass in Figure 3.13.
double Mass2;
// The length of rigid wire connecting mass 1 to mass 2.
double WireLength;
// The pulley parameters.
double Mass3, Radius, Inertia;
// The spring parameters.
double SpringLength, SpringConstant;
// Member access.
inline double GetInitialY1 () const;
inline double GetCurrentY1 () const;
inline double GetCurrentY2 () const;
inline double GetCurrentY3 () const;
inline double GetAngle () const;
inline double GetCableFraction1 () const;
inline double GetCableFraction2 () const;
private:
// time information
double mTime, mDeltaTime;
// derived parameters
double mAlpha, mBeta, mGamma, mDelta, mOmega, mGDivOmegaSqr;
// initial conditions
double mY1, mY2, mY3, mDY1, mDY2, mDY3;
// solution parameters
double mLPlusGDivOmegaSqr, mK1, mK2, mTCoeff, mTSqrCoeff;
double mDeltaDivOmegaSqr, mY1Curr, mY2Curr, mY3Curr;
};
#include "PhysicsModule.inl"
#endif
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