118 lines
2.4 KiB
C++
118 lines
2.4 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
|
|
//
|
|
// Purpose:
|
|
//
|
|
// $NoKeywords: $
|
|
//=============================================================================//
|
|
|
|
#ifndef ROPE_PHYSICS_H
|
|
#define ROPE_PHYSICS_H
|
|
#ifdef _WIN32
|
|
#pragma once
|
|
#endif
|
|
|
|
|
|
#include "simple_physics.h"
|
|
#include "networkvar.h"
|
|
|
|
|
|
class CRopeSpring
|
|
{
|
|
public:
|
|
Vector *m_pNode1;
|
|
Vector *m_pNode2;
|
|
};
|
|
|
|
|
|
class CBaseRopePhysics : public CSimplePhysics::IHelper
|
|
{
|
|
public:
|
|
DECLARE_CLASS_NOBASE( CBaseRopePhysics );
|
|
|
|
CBaseRopePhysics(
|
|
CSimplePhysics::CNode *pNodes,
|
|
int nNodes,
|
|
CRopeSpring *pSprings,
|
|
float *flSpringDistsSqr );
|
|
|
|
// nNodes should be less than or equal to what you passed into the constructor.
|
|
void SetNumNodes( int nNodes );
|
|
|
|
// Restart timers and such.
|
|
void Restart();
|
|
|
|
void ResetSpringLength(float flSpringDist );
|
|
float GetSpringLength() const;
|
|
void ResetNodeSpringLength( int iStartNode, float flSpringDist );
|
|
|
|
// Set simulation parameters.
|
|
// If you pass in a delegate, you can be called to apply constraints.
|
|
void SetupSimulation( float flSpringDist, CSimplePhysics::IHelper *pDelegate=0 );
|
|
|
|
// Set the physics delegate.
|
|
void SetDelegate( CSimplePhysics::IHelper *pDelegate );
|
|
|
|
void Simulate( float dt );
|
|
|
|
int NumNodes() { return m_nNodes; }
|
|
CSimplePhysics::CNode* GetNode( int iNode ) { return &m_pNodes[iNode]; }
|
|
CSimplePhysics::CNode* GetFirstNode() { return &m_pNodes[0]; }
|
|
CSimplePhysics::CNode* GetLastNode() { return &m_pNodes[ m_nNodes-1 ]; }
|
|
|
|
|
|
|
|
public:
|
|
|
|
virtual void GetNodeForces( CSimplePhysics::CNode *pNodes, int iNode, Vector *pAccel );
|
|
virtual void ApplyConstraints( CSimplePhysics::CNode *pNodes, int nNodes );
|
|
|
|
|
|
private:
|
|
|
|
int NumSprings() {return m_nNodes - 1;}
|
|
|
|
|
|
protected:
|
|
|
|
CSimplePhysics::IHelper *m_pDelegate;
|
|
|
|
CSimplePhysics::CNode *m_pNodes;
|
|
int m_nNodes;
|
|
|
|
CRopeSpring *m_pSprings;
|
|
|
|
float m_flSpringDist;
|
|
float m_flSpringDistSqr;
|
|
|
|
// Spring lengths per node
|
|
float *m_flNodeSpringDistsSqr;
|
|
|
|
CSimplePhysics m_Physics;
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
template< int NUM_NODES >
|
|
class CRopePhysics : public CBaseRopePhysics
|
|
{
|
|
public:
|
|
|
|
CRopePhysics();
|
|
|
|
CSimplePhysics::CNode m_Nodes[NUM_NODES];
|
|
CRopeSpring m_Springs[NUM_NODES - 1];
|
|
float m_SpringDistsSqr[NUM_NODES - 1];
|
|
};
|
|
|
|
|
|
template< int NUM_NODES >
|
|
CRopePhysics<NUM_NODES>::CRopePhysics() :
|
|
CBaseRopePhysics( m_Nodes, NUM_NODES, m_Springs, m_SpringDistsSqr )
|
|
{
|
|
}
|
|
|
|
|
|
#endif // ROPE_PHYSICS_H
|