source-engine/game/client/cstrike/fx_cs_muzzleflash.cpp

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

#include "cbase.h"
#include "particles_simple.h"
#include "particles_localspace.h"
#include "c_te_effect_dispatch.h"
#include "clienteffectprecachesystem.h"

// Precache our effects
CLIENTEFFECT_REGISTER_BEGIN( PrecacheEffect_CS_MuzzleFlash )
CLIENTEFFECT_MATERIAL( "effects/muzzleflashX" )	//.vmt
CLIENTEFFECT_MATERIAL( "sprites/muzzleflash4" )	//.vmt
CLIENTEFFECT_REGISTER_END()

void TE_DynamicLight( IRecipientFilter& filter, float delay,
	const Vector* org, int r, int g, int b, int exponent, float radius, float time, float decay, int nLightIndex = LIGHT_INDEX_TE_DYNAMIC );

void CS_MuzzleFlashCallback( const CEffectData &data )
{
	CSmartPtr<CLocalSpaceEmitter> pEmitter = 
		CLocalSpaceEmitter::Create( "CS_MuzzleFlash", data.m_hEntity, data.m_nAttachmentIndex, 0 );

	if ( !pEmitter )
		return;

	// SetBBox() manually on the particle system so it doesn't have to be recalculated more than once.
	Vector vCenter( 0.0f, 0.0f, 0.0f );
	C_BaseEntity *pEnt = data.GetEntity();
	if ( pEnt )
	{
		vCenter = pEnt->WorldSpaceCenter();
	}
	else
	{
		IClientRenderable *pRenderable = data.GetRenderable( );
		if ( pRenderable )
		{
			Vector vecMins, vecMaxs;
			pRenderable->GetRenderBoundsWorldspace( vecMins, vecMaxs );
			VectorAdd( vecMins, vecMaxs, vCenter );
			vCenter *= 0.5f;
		}
	}

	Assert( pEmitter );
	pEmitter->GetBinding().SetBBox( vCenter - Vector( 3, 3, 3 ), vCenter + Vector( 3, 3, 3 ) );

	// haxors - make the clip much shorter so the alpha is not 
	// changed based on large clip distances
	pEmitter->SetNearClip( 0, 5 );

	PMaterialHandle hFlashMaterial = pEmitter->GetPMaterial( "sprites/muzzleflash4" );

	for( int i=0;i<3;i++ )
	{
		SimpleParticle *pParticle = (SimpleParticle *)pEmitter->AddParticle( sizeof( SimpleParticle ),
															hFlashMaterial,
															vec3_origin );
		if( pParticle )
		{
			pParticle->m_flLifetime		= 0.0f;
			pParticle->m_flDieTime		= 0.08f;

			pParticle->m_vecVelocity = vec3_origin;

			pParticle->m_uchColor[0]	= 255;
			pParticle->m_uchColor[1]	= 255;
			pParticle->m_uchColor[2]	= 255;

			pParticle->m_uchStartAlpha	= 80;
			pParticle->m_uchEndAlpha	= 30;

			pParticle->m_uchStartSize	= ( 3.0 + 3.0*i ) * data.m_flScale;

			pParticle->m_uchEndSize		= pParticle->m_uchStartSize * 0.8;
			pParticle->m_flRoll			= random->RandomInt( 0, 3 );

			pParticle->m_flRollDelta	= 0.0f;
		}
	}

	// dynamic light temporary entity for the muzzle flash
	CPVSFilter filter(pEmitter->GetSortOrigin());
	TE_DynamicLight( filter, 0.0, &(pEmitter->GetSortOrigin()), 255, 192, 64, 5, 70, 0.05, 768 );
}

DECLARE_CLIENT_EFFECT( "CS_MuzzleFlash", CS_MuzzleFlashCallback );


// 'X' shaped muzzleflash used by certain weapons
void CS_MuzzleFlashXCallback( const CEffectData &data )
{
	CSmartPtr<CLocalSpaceEmitter> pEmitter = 
		CLocalSpaceEmitter::Create( "CS_MuzzleFlashX", data.m_hEntity, data.m_nAttachmentIndex, 0 );

	Assert( pEmitter );

	// haxors - make the clip much shorter so the alpha is not 
	// changed based on large clip distances
	pEmitter->SetNearClip( 0, 5 );

	PMaterialHandle hFlashMaterial = pEmitter->GetPMaterial( "effects/muzzleflashX" );

	SimpleParticle *pParticle = (SimpleParticle *)pEmitter->AddParticle( sizeof( SimpleParticle ),
														hFlashMaterial,
														vec3_origin );
	if( pParticle )
	{
		pParticle->m_flLifetime		= 0.0f;
		pParticle->m_flDieTime		= 0.08f;

		pParticle->m_vecVelocity = vec3_origin;

		pParticle->m_uchColor[0]	= 255;
		pParticle->m_uchColor[1]	= 255;
		pParticle->m_uchColor[2]	= 255;

		pParticle->m_uchStartAlpha	= 130;
		pParticle->m_uchEndAlpha	= 80;

		pParticle->m_uchStartSize	= 6.0f * data.m_flScale * random->RandomFloat( 0.9, 1.1 );

		pParticle->m_uchEndSize		= pParticle->m_uchStartSize * 0.8;

		pParticle->m_flRoll			= random->RandomFloat( -0.25, 0.25 );

		pParticle->m_flRollDelta	= 0.0f;
	}

	// dynamic light temporary entity for the muzzle flash
	CPVSFilter filter(pEmitter->GetSortOrigin());
	TE_DynamicLight( filter, 0.0, &(pEmitter->GetSortOrigin()), 255, 192, 64, 5, 70, 0.05, 768 );
}

DECLARE_CLIENT_EFFECT( "CS_MuzzleFlash_X", CS_MuzzleFlashXCallback );