106 lines
2.9 KiB
C++
106 lines
2.9 KiB
C++
//========= Copyright © 1996-2005, Valve Corporation, All rights reserved. ============//
|
|
//
|
|
// Purpose:
|
|
//
|
|
// $NoKeywords: $
|
|
//=============================================================================//
|
|
#include "cbase.h"
|
|
#include "ProxyEntity.h"
|
|
#include "materialsystem/IMaterialVar.h"
|
|
#include "materialsystem/IMaterial.h"
|
|
#include "view.h"
|
|
|
|
#include "imaterialproxydict.h"
|
|
// memdbgon must be the last include file in a .cpp file!!!
|
|
#include "tier0/memdbgon.h"
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Purpose: Used for halos on lamps, this material fades the sprite IN
|
|
// as the viewer nears.
|
|
//-----------------------------------------------------------------------------
|
|
class CLampHaloProxy : public CEntityMaterialProxy
|
|
{
|
|
public:
|
|
CLampHaloProxy( void );
|
|
virtual ~CLampHaloProxy( void );
|
|
virtual bool Init( IMaterial *pMaterial, KeyValues *pKeyValues );
|
|
virtual void OnBind( C_BaseEntity *pC_BaseEntity );
|
|
|
|
virtual IMaterial * GetMaterial();
|
|
|
|
private:
|
|
IMaterialVar *m_pFadeValue;
|
|
};
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Purpose:
|
|
//-----------------------------------------------------------------------------
|
|
CLampHaloProxy::CLampHaloProxy( void )
|
|
{
|
|
m_pFadeValue = NULL;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Purpose:
|
|
//-----------------------------------------------------------------------------
|
|
CLampHaloProxy::~CLampHaloProxy( void )
|
|
{
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Purpose: Get pointer to the color value
|
|
// Input : *pMaterial -
|
|
//-----------------------------------------------------------------------------
|
|
bool CLampHaloProxy::Init( IMaterial *pMaterial, KeyValues *pKeyValues )
|
|
{
|
|
assert( pMaterial );
|
|
|
|
// Get pointers to material vars.
|
|
|
|
// Need to get the color variable.
|
|
bool found;
|
|
m_pFadeValue = pMaterial->FindVar( "$alpha", &found );
|
|
pMaterial->SetMaterialVarFlag( MATERIAL_VAR_ALPHA_MODIFIED_BY_PROXY, true );
|
|
return found;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Purpose:
|
|
// Input : *pC_BaseEntity -
|
|
//-----------------------------------------------------------------------------
|
|
#define FADE_DIST 150
|
|
|
|
void CLampHaloProxy::OnBind( C_BaseEntity *pEnt )
|
|
{
|
|
if ( !m_pFadeValue )
|
|
return;
|
|
|
|
Vector vecLocal = pEnt->GetAbsOrigin() - CurrentViewOrigin();
|
|
VectorNormalize( vecLocal );
|
|
|
|
float fade = fabs( vecLocal.z );
|
|
|
|
// I hate these magic numbers here, will have to revise
|
|
// (sjb)
|
|
if( fade < 0.25 )
|
|
{
|
|
fade = 0.0;
|
|
}
|
|
else
|
|
{
|
|
fade = MIN( (fade - 0.25) * 1.35, 1.0f );
|
|
}
|
|
|
|
m_pFadeValue->SetFloatValue( fade );
|
|
}
|
|
|
|
IMaterial *CLampHaloProxy::GetMaterial()
|
|
{
|
|
if ( !m_pFadeValue )
|
|
return NULL;
|
|
|
|
return m_pFadeValue->GetOwningMaterial();
|
|
}
|
|
|
|
EXPOSE_MATERIAL_PROXY( CLampHaloProxy, lamphalo );
|