Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: Physics constraint entities
//
// $NoKeywords: $
//===========================================================================//
#ifndef PHYSCONSTRAINT_H
#define PHYSCONSTRAINT_H
#ifdef _WIN32
#pragma once
#endif
#include "vphysics/constraints.h"
struct hl_constraint_info_t
{
hl_constraint_info_t()
{
pObjects[0] = pObjects[1] = NULL;
pGroup = NULL;
anchorPosition[0].Init();
anchorPosition[1].Init();
swapped = false;
massScale[0] = massScale[1] = 1.0f;
}
Vector anchorPosition[2];
IPhysicsObject *pObjects[2];
IPhysicsConstraintGroup *pGroup;
float massScale[2];
bool swapped;
};
abstract_class CPhysConstraint : public CLogicalEntity
{
DECLARE_CLASS( CPhysConstraint, CLogicalEntity );
public:
CPhysConstraint();
~CPhysConstraint();
DECLARE_DATADESC();
void Spawn( void );
void Precache( void );
void Activate( void );
void ClearStaticFlag( IPhysicsObject *pObj );
virtual void Deactivate();
void OnBreak( void );
void InputBreak( inputdata_t &inputdata );
void InputOnBreak( inputdata_t &inputdata );
void InputTurnOn( inputdata_t &inputdata );
void InputTurnOff( inputdata_t &inputdata );
int DrawDebugTextOverlays();
void DrawDebugGeometryOverlays();
void GetBreakParams( constraint_breakableparams_t &params, const hl_constraint_info_t &info );
// the notify system calls this on the constrained entities - used to detect & follow teleports
void NotifySystemEvent( CBaseEntity *pNotify, notify_system_event_t eventType, const notify_system_event_params_t &params );
// gets called at setup time on first init and restore
virtual void OnConstraintSetup( hl_constraint_info_t &info );
// return the internal constraint object (used by sound gadgets)
inline IPhysicsConstraint *GetPhysConstraint() { return m_pConstraint; }
string_t GetNameAttach1( void ){ return m_nameAttach1; }
string_t GetNameAttach2( void ){ return m_nameAttach2; }
protected:
void GetConstraintObjects( hl_constraint_info_t &info );
void SetupTeleportationHandling( hl_constraint_info_t &info );
bool ActivateConstraint( void );
virtual IPhysicsConstraint *CreateConstraint( IPhysicsConstraintGroup *pGroup, const hl_constraint_info_t &info ) = 0;
IPhysicsConstraint *m_pConstraint;
// These are "template" values used to construct the hinge
string_t m_nameAttach1;
string_t m_nameAttach2;
string_t m_breakSound;
string_t m_nameSystem;
float m_forceLimit;
float m_torqueLimit;
unsigned int m_teleportTick;
float m_minTeleportDistance;
COutputEvent m_OnBreak;
};
//-----------------------------------------------------------------------------
// Purpose: Fixed breakable constraint
//-----------------------------------------------------------------------------
class CPhysFixed : public CPhysConstraint
{
DECLARE_CLASS( CPhysFixed, CPhysConstraint );
public:
IPhysicsConstraint *CreateConstraint( IPhysicsConstraintGroup *pGroup, const hl_constraint_info_t &info );
// just for debugging - move to the position of the reference entity
void MoveToRefPosition()
{
if ( m_pConstraint )
{
matrix3x4_t xformRef;
m_pConstraint->GetConstraintTransform( &xformRef, NULL );
IPhysicsObject *pObj = m_pConstraint->GetReferenceObject();
if ( pObj && pObj->IsMoveable() )
{
Vector pos, posWorld;
MatrixPosition( xformRef, pos );
pObj->LocalToWorld(&posWorld, pos);
SetAbsOrigin(posWorld);
}
}
}
int DrawDebugTextOverlays()
{
if ( m_debugOverlays & OVERLAY_TEXT_BIT )
{
MoveToRefPosition();
}
return BaseClass::DrawDebugTextOverlays();
}
void DrawDebugGeometryOverlays()
{
if ( m_debugOverlays & (OVERLAY_BBOX_BIT|OVERLAY_PIVOT_BIT|OVERLAY_ABSBOX_BIT) )
{
MoveToRefPosition();
}
BaseClass::DrawDebugGeometryOverlays();
}
};
#endif // PHYSCONSTRAINT_H