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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
//=============================================================================//
#include "cbase.h"
#include "c_basehelicopter.h"
#include "proxyentity.h"
#include "materialsystem/imaterial.h"
#include "materialsystem/imaterialvar.h"
#include "KeyValues.h"
// memdbgon must be the last include file in a .cpp file!!!
#include "tier0/memdbgon.h"
IMPLEMENT_CLIENTCLASS_DT( C_BaseHelicopter, DT_BaseHelicopter, CBaseHelicopter )
RecvPropTime( RECVINFO( m_flStartupTime ) ),
END_RECV_TABLE()
C_BaseHelicopter::C_BaseHelicopter()
{
}
//-----------------------------------------------------------------------------
// Chopper blade fade-in time
//-----------------------------------------------------------------------------
#define FADE_IN_TIME 2.0f
//-----------------------------------------------------------------------------
// Sets the fade of the blades when the chopper starts up
//-----------------------------------------------------------------------------
class CHeliBladeMaterialProxy : public CEntityMaterialProxy
{
public:
CHeliBladeMaterialProxy() { m_AlphaVar = NULL; }
virtual ~CHeliBladeMaterialProxy() {}
virtual bool Init( IMaterial *pMaterial, KeyValues *pKeyValues );
virtual void OnBind( C_BaseEntity *pEntity );
virtual IMaterial *GetMaterial();
private:
IMaterialVar *m_AlphaVar;
bool m_bFadeOut;
};
bool CHeliBladeMaterialProxy::Init( IMaterial *pMaterial, KeyValues *pKeyValues )
{
bool foundVar;
m_AlphaVar = pMaterial->FindVar( "$alpha", &foundVar, false );
m_bFadeOut = pKeyValues->GetInt( "$fadeout", 0 ) != 0;
return foundVar;
}
void CHeliBladeMaterialProxy::OnBind( C_BaseEntity *pEnt )
{
if (!m_AlphaVar)
return;
C_BaseHelicopter *pHeli = dynamic_cast<C_BaseHelicopter*>( pEnt );
if ( pHeli )
{
float dt = gpGlobals->curtime - pHeli->StartupTime();
dt /= FADE_IN_TIME;
dt = clamp( dt, 0.0f, 1.0f );
if ( m_bFadeOut )
{
dt = 1.0f - dt;
}
m_AlphaVar->SetFloatValue( dt );
}
else
{
m_AlphaVar->SetFloatValue( 1.0f );
}
}
IMaterial *CHeliBladeMaterialProxy::GetMaterial()
{
if ( !m_AlphaVar )
return NULL;
return m_AlphaVar->GetOwningMaterial();
}
EXPOSE_INTERFACE( CHeliBladeMaterialProxy, IMaterialProxy, "HeliBlade" IMATERIAL_PROXY_INTERFACE_VERSION );
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