source-engine/game/server/env_zoom.cpp

//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: 
//
//=============================================================================//

#include "cbase.h"
#include "env_zoom.h"

#ifdef HL2_DLL
#include "hl2_player.h"
#endif

// memdbgon must be the last include file in a .cpp file!!!
#include "tier0/memdbgon.h"

#define ENV_ZOOM_OVERRIDE (1<<0)

class CEnvZoom : public CPointEntity
{
public:
	DECLARE_CLASS( CEnvZoom, CPointEntity );

	void	InputZoom( inputdata_t &inputdata );
	void	InputUnZoom( inputdata_t &inputdata );

	int	GetFOV( void ) { return m_nFOV;	}
	float GetSpeed( void ) { return m_flSpeed;	}
private:

	float	m_flSpeed;
	int		m_nFOV;

	DECLARE_DATADESC();
};

LINK_ENTITY_TO_CLASS( env_zoom, CEnvZoom );

BEGIN_DATADESC( CEnvZoom )

	DEFINE_KEYFIELD( m_flSpeed, FIELD_FLOAT, "Rate" ),
	DEFINE_KEYFIELD( m_nFOV, FIELD_INTEGER, "FOV" ),

	DEFINE_INPUTFUNC( FIELD_VOID, "Zoom", InputZoom ),
	DEFINE_INPUTFUNC( FIELD_VOID, "UnZoom", InputUnZoom ),

END_DATADESC()

bool CanOverrideEnvZoomOwner( CBaseEntity *pZoomOwner )
{
	CEnvZoom *pZoom = dynamic_cast<CEnvZoom*>(pZoomOwner );

	if ( pZoom == NULL || ( pZoom && pZoom->HasSpawnFlags( ENV_ZOOM_OVERRIDE ) == false ) )
		 return false;

	return true;
}

float GetZoomOwnerDesiredFOV( CBaseEntity *pZoomOwner )
{
	if ( CanOverrideEnvZoomOwner( pZoomOwner ) )
	{
		CEnvZoom *pZoom = dynamic_cast<CEnvZoom*>( pZoomOwner );

		return pZoom->GetFOV();
	}

	return 0;
}

//-----------------------------------------------------------------------------
// Purpose: 
// Input  : &inputdata - 
//-----------------------------------------------------------------------------
void CEnvZoom::InputZoom( inputdata_t &inputdata )
{
	CBasePlayer *pPlayer = UTIL_GetLocalPlayer();

	if ( pPlayer )
	{

#ifdef HL2_DLL
		if ( pPlayer == pPlayer->GetFOVOwner() )
		{
			CHL2_Player *pHLPlayer = static_cast<CHL2_Player*>( pPlayer );

			pHLPlayer->StopZooming();
		}
#endif

		// If the player's already holding a fov from another env_zoom, we're allowed to overwrite it
		if ( pPlayer->GetFOVOwner() && FClassnameIs( pPlayer->GetFOVOwner(), "env_zoom" ) )
		{
			pPlayer->ClearZoomOwner();
		}

		//Stuff the values
		pPlayer->SetFOV( this, m_nFOV, m_flSpeed );
	}
}

//-----------------------------------------------------------------------------
// Purpose: 
// Input  : &inputdata - 
//-----------------------------------------------------------------------------
void CEnvZoom::InputUnZoom( inputdata_t &inputdata )
{
	CBasePlayer *pPlayer = UTIL_GetLocalPlayer();

	if ( pPlayer )
	{
		// Stuff the values
		pPlayer->SetFOV( this, 0 );
	}
}