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game/client/hl2/c_plasma_beam_node.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#include "cbase.h"
+#include "particles_simple.h"
+#include "c_tracer.h"
+#include "particle_collision.h"
+#include "view.h"
+#include "clienteffectprecachesystem.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+#define	PLASMASPARK_LIFETIME 0.5
+#define SPRAYS_PER_THINK		12
+
+CLIENTEFFECT_REGISTER_BEGIN( PrecacheEffectPlasmaBeam )
+CLIENTEFFECT_MATERIAL( "sprites/plasmaember" )
+CLIENTEFFECT_REGISTER_END()
+
+class  C_PlasmaBeamNode;
+
+//##################################################################
+//
+// > CPlasmaSpray
+//
+//##################################################################
+class CPlasmaSpray : public CSimpleEmitter
+{
+public:
+	CPlasmaSpray( const char *pDebugName ) : CSimpleEmitter( pDebugName ) {}
+
+	static CSmartPtr<CPlasmaSpray>	Create( const char *pDebugName );
+	void					Think( void );
+	void					UpdateVelocity( SimpleParticle *pParticle, float timeDelta );
+	virtual void RenderParticles( CParticleRenderIterator *pIterator );
+	virtual void SimulateParticles( CParticleSimulateIterator *pIterator );
+	EHANDLE					m_pOwner;
+	CParticleCollision		m_ParticleCollision;
+
+private:
+	CPlasmaSpray( const CPlasmaSpray & );
+};
+
+//##################################################################
+//
+// PlasmaBeamNode - generates plasma spray
+//
+//##################################################################
+class C_PlasmaBeamNode : public C_BaseEntity
+{
+public:
+	DECLARE_CLASS( C_PlasmaBeamNode, C_BaseEntity );
+	DECLARE_CLIENTCLASS();
+
+	C_PlasmaBeamNode();
+	~C_PlasmaBeamNode(void);
+
+public:
+	void			ClientThink(void);
+	void			AddEntity( void );
+	void			OnDataChanged(DataUpdateType_t updateType);
+	bool			ShouldDraw();
+	bool			m_bSprayOn;
+	CSmartPtr<CPlasmaSpray>	m_pFirePlasmaSpray;
+};
+
+//##################################################################
+//
+// > CPlasmaSpray
+//
+//##################################################################
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : *pParticle - 
+//			timeDelta - 
+// Output : float
+//-----------------------------------------------------------------------------
+CSmartPtr<CPlasmaSpray> CPlasmaSpray::Create( const char *pDebugName )
+{
+	CPlasmaSpray *pRet = new CPlasmaSpray( pDebugName );
+	return pRet;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : fTimeDelta - 
+// Output : Vector
+//-----------------------------------------------------------------------------
+void CPlasmaSpray::UpdateVelocity( SimpleParticle *pParticle, float timeDelta )
+{
+	Vector		vGravity = Vector(0,0,-1000);
+	float		flFrametime = gpGlobals->frametime;
+	vGravity	= flFrametime * vGravity;
+	pParticle->m_vecVelocity += vGravity;
+}
+
+
+void CPlasmaSpray::SimulateParticles( CParticleSimulateIterator *pIterator )
+{
+	float timeDelta = pIterator->GetTimeDelta();
+
+	SimpleParticle *pParticle = (SimpleParticle*)pIterator->GetFirst();
+	while ( pParticle )
+	{
+		//Should this particle die?
+		pParticle->m_flLifetime += timeDelta;
+
+		C_PlasmaBeamNode* pNode = (C_PlasmaBeamNode*)((C_BaseEntity*)m_pOwner);
+		if ( pParticle->m_flLifetime >= pParticle->m_flDieTime )
+		{
+			pIterator->RemoveParticle( pParticle );
+		}
+		// If owner is gone or spray off remove me
+		else if (pNode == NULL || !pNode->m_bSprayOn)
+		{
+			pIterator->RemoveParticle( pParticle );
+		}
+
+		//Simulate the movement with collision
+		trace_t trace;
+		m_ParticleCollision.MoveParticle( pParticle->m_Pos, pParticle->m_vecVelocity, NULL, timeDelta, &trace );
+
+		pParticle = (SimpleParticle*)pIterator->GetNext();
+	}
+}
+
+
+void CPlasmaSpray::RenderParticles( CParticleRenderIterator *pIterator )
+{
+	const SimpleParticle *pParticle = (const SimpleParticle *)pIterator->GetFirst();
+	while ( pParticle )
+	{
+		float scale = random->RandomFloat( 0.02, 0.08 );
+
+		// NOTE: We need to do everything in screen space
+		Vector  delta;
+		Vector	start;
+		TransformParticle(ParticleMgr()->GetModelView(), pParticle->m_Pos, start);
+		float sortKey = start.z;
+
+		Vector3DMultiply( CurrentWorldToViewMatrix(), pParticle->m_vecVelocity, delta );
+
+		delta[0] *= scale;
+		delta[1] *= scale;
+		delta[2] *= scale;
+
+		// See c_tracer.* for this method
+		Tracer_Draw( pIterator->GetParticleDraw(), start, delta, random->RandomInt( 2, 8 ), 0 );
+
+		pParticle = (const SimpleParticle *)pIterator->GetNext( sortKey );
+	}
+}
+
+
+//##################################################################
+//
+// PlasmaBeamNode - generates plasma spray
+//
+//##################################################################
+
+//------------------------------------------------------------------------------
+// Purpose :
+// Input   :
+// Output  :
+//------------------------------------------------------------------------------
+C_PlasmaBeamNode::C_PlasmaBeamNode(void)
+{
+	m_bSprayOn			= false;
+	m_pFirePlasmaSpray = CPlasmaSpray::Create( "C_PlasmaBeamNode" );
+}
+
+//------------------------------------------------------------------------------
+// Purpose :
+// Input   :
+// Output  :
+//------------------------------------------------------------------------------
+C_PlasmaBeamNode::~C_PlasmaBeamNode(void)
+{
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void C_PlasmaBeamNode::AddEntity( void )
+{
+	m_pFirePlasmaSpray->SetSortOrigin( GetAbsOrigin() );
+}
+
+//------------------------------------------------------------------------------
+// Purpose :
+// Input   :
+// Output  :
+//------------------------------------------------------------------------------
+void C_PlasmaBeamNode::OnDataChanged(DataUpdateType_t updateType)
+{
+	if (updateType == DATA_UPDATE_CREATED)
+	{
+		Vector vMoveDir = GetAbsVelocity();
+		float  flVel = VectorNormalize(vMoveDir);
+		m_pFirePlasmaSpray->m_ParticleCollision.Setup( GetAbsOrigin(), &vMoveDir, 0.3, 
+											flVel-50, flVel+50, 800, 0.5 );
+		SetNextClientThink(gpGlobals->curtime + 0.01);
+	}
+	C_BaseEntity::OnDataChanged(updateType);
+}
+
+//------------------------------------------------------------------------------
+// Purpose :
+// Input   :
+// Output  :
+//------------------------------------------------------------------------------
+bool C_PlasmaBeamNode::ShouldDraw()
+{
+	return false;
+}
+
+//------------------------------------------------------------------------------
+// Purpose :
+// Input   :
+// Output  :
+//------------------------------------------------------------------------------
+void C_PlasmaBeamNode::ClientThink(void)
+{
+	if (!m_bSprayOn)
+	{
+		return;
+	}
+	
+	trace_t trace;
+	Vector vEndTrace = GetAbsOrigin() + (0.3*GetAbsVelocity());
+	UTIL_TraceLine( GetAbsOrigin(), vEndTrace, MASK_SHOT, NULL, COLLISION_GROUP_NONE, &trace );
+	if ( trace.fraction != 1.0f || trace.startsolid)
+	{
+		m_bSprayOn = false;
+		return;
+	}
+
+	PMaterialHandle handle = m_pFirePlasmaSpray->GetPMaterial( "sprites/plasmaember" );
+	for (int i=0;i<SPRAYS_PER_THINK;i++)
+	{
+		SimpleParticle	*sParticle;
+
+		//Make a new particle
+		if ( random->RandomInt( 0, 2 ) == 0 )
+		{
+			float ranx = random->RandomFloat( -28.0f, 28.0f );
+			float rany = random->RandomFloat( -28.0f, 28.0f );
+			float ranz = random->RandomFloat( -28.0f, 28.0f );
+
+			Vector vNewPos	=  GetAbsOrigin();
+			Vector vAdd		=  Vector(GetAbsAngles().x,GetAbsAngles().y,GetAbsAngles().z)*random->RandomFloat(-60,120);
+			vNewPos			+= vAdd;
+
+			sParticle = (SimpleParticle *) m_pFirePlasmaSpray->AddParticle( sizeof(SimpleParticle), handle, vNewPos );
+			
+			sParticle->m_flLifetime		= 0.0f;
+			sParticle->m_flDieTime		= PLASMASPARK_LIFETIME;
+
+			sParticle->m_vecVelocity	= GetAbsVelocity();
+			sParticle->m_vecVelocity.x	+= ranx;
+			sParticle->m_vecVelocity.y	+= rany;
+			sParticle->m_vecVelocity.z	+= ranz;
+			m_pFirePlasmaSpray->m_pOwner	=  this;
+		}
+	}
+
+	SetNextClientThink(gpGlobals->curtime + 0.05);
+}
+
+IMPLEMENT_CLIENTCLASS_DT(C_PlasmaBeamNode, DT_PlasmaBeamNode, CPlasmaBeamNode )
+	RecvPropVector	(RECVINFO(m_vecVelocity), 0, RecvProxy_LocalVelocity),
+	RecvPropInt		(RECVINFO(m_bSprayOn)),
+END_RECV_TABLE()