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