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game/client/hl2/c_func_tankmortar.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================//
+
+#include "cbase.h"
+#include "fx_quad.h"
+#include "fx.h"
+
+class C_MortarShell : public C_BaseEntity
+{
+public:
+
+	DECLARE_CLASS( C_MortarShell, C_BaseEntity );
+	DECLARE_CLIENTCLASS();
+
+	void OnDataChanged( DataUpdateType_t updateType );
+	int DrawModel( int flags );
+	
+	RenderGroup_t	GetRenderGroup( void )	{ return RENDER_GROUP_TRANSLUCENT_ENTITY; }
+
+private:
+
+	void AddRisingParticles( float flPerc );
+	void AddExplodingParticles( float flPerc );
+
+	inline float GetStartPerc( void );
+	inline float GetEndPerc( void );
+
+	CSmartPtr<CSimpleEmitter> m_pEmitter;
+	TimedEvent	m_ParticleEvent;
+
+	float	m_flLifespan;
+	float	m_flRadius;
+	float	m_flStarttime;
+	Vector	m_vecSurfaceNormal;
+};
+
+IMPLEMENT_CLIENTCLASS_DT( C_MortarShell, DT_MortarShell, CMortarShell )
+	RecvPropFloat( RECVINFO( m_flLifespan ) ),
+	RecvPropFloat( RECVINFO( m_flRadius ) ),
+	RecvPropVector( RECVINFO( m_vecSurfaceNormal ) ),
+END_RECV_TABLE()
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : updateType - 
+//-----------------------------------------------------------------------------
+void C_MortarShell::OnDataChanged( DataUpdateType_t updateType )
+{
+	BaseClass::OnDataChanged( updateType );
+
+	if ( updateType == DATA_UPDATE_CREATED )
+	{
+		m_flStarttime = gpGlobals->curtime;
+		AddToLeafSystem( RENDER_GROUP_TRANSLUCENT_ENTITY );
+
+		m_pEmitter = CSimpleEmitter::Create( "C_EntityDissolve" );
+		m_pEmitter->SetSortOrigin( GetAbsOrigin() );
+
+		m_ParticleEvent.Init( 128 );
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : flPerc - 
+//-----------------------------------------------------------------------------
+void C_MortarShell::AddRisingParticles( float flPerc )
+{
+	SimpleParticle *sParticle;
+
+	Vector offset;
+	float radius = m_flRadius * 0.25f * flPerc;
+
+	float val = RemapValClamped( gpGlobals->curtime, m_flStarttime, m_flStarttime + m_flLifespan, 0.0f, 1.0f );
+
+	float flCur = gpGlobals->frametime;
+
+	// Anime ground effects
+	while ( m_ParticleEvent.NextEvent( flCur ) )
+	{
+		offset.x = random->RandomFloat( -radius, radius );
+		offset.y = random->RandomFloat( -radius, radius );
+		offset.z = random->RandomFloat( -8.0f, 8.0f );
+
+		offset += GetAbsOrigin();
+
+		sParticle = (SimpleParticle *) m_pEmitter->AddParticle( sizeof(SimpleParticle), m_pEmitter->GetPMaterial( "effects/spark" ), offset );
+		
+		if ( sParticle == NULL )
+			return;
+
+		sParticle->m_vecVelocity = Vector( Helper_RandomFloat( -4.0f, 4.0f ), Helper_RandomFloat( -4.0f, 4.0f ), Helper_RandomFloat( 32.0f, 256.0f ) * Bias( val, 0.25f ) );
+		
+		sParticle->m_uchStartSize	= random->RandomFloat( 4, 8 ) * flPerc;
+
+		sParticle->m_flDieTime = random->RandomFloat( 0.5f, 1.0f );
+		
+		sParticle->m_flLifetime		= 0.0f;
+
+		sParticle->m_flRoll			= Helper_RandomInt( 0, 360 );
+
+		float alpha = 255 * flPerc;
+
+		sParticle->m_flRollDelta	= Helper_RandomFloat( -8.0f * flPerc, 8.0f * flPerc );
+		sParticle->m_uchColor[0]	= alpha;
+		sParticle->m_uchColor[1]	= alpha;
+		sParticle->m_uchColor[2]	= alpha;
+		sParticle->m_uchStartAlpha	= alpha;
+		sParticle->m_uchEndAlpha	= 0;
+		sParticle->m_uchEndSize		= 0;
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : flPerc - 
+//-----------------------------------------------------------------------------
+void C_MortarShell::AddExplodingParticles( float flPerc )
+{
+	SimpleParticle *sParticle;
+
+	Vector offset;
+	float radius = 48.0f * flPerc;
+
+	float flCur = gpGlobals->frametime;
+
+	// Anime ground effects
+	while ( m_ParticleEvent.NextEvent( flCur ) )
+	{
+		offset.x = random->RandomFloat( -radius, radius );
+		offset.y = random->RandomFloat( -radius, radius );
+		offset.z = random->RandomFloat( -8.0f, 8.0f );
+
+		offset += GetAbsOrigin();
+
+		sParticle = (SimpleParticle *) m_pEmitter->AddParticle( sizeof(SimpleParticle), m_pEmitter->GetPMaterial( "effects/spark" ), offset );
+		
+		if ( sParticle == NULL )
+			return;
+
+		sParticle->m_vecVelocity = RandomVector( -1.0f, 1.0f ) + Vector( 0, 0, 1 );
+		sParticle->m_vecVelocity *= ( 750.0f * flPerc );
+		
+		sParticle->m_uchStartSize	= random->RandomFloat( 2, 4 ) * flPerc;
+
+		sParticle->m_flDieTime = random->RandomFloat( 0.25f, 0.5f );
+		
+		sParticle->m_flLifetime		= 0.0f;
+
+		sParticle->m_flRoll			= Helper_RandomInt( 0, 360 );
+
+		float alpha = 255 * flPerc;
+
+		sParticle->m_flRollDelta	= Helper_RandomFloat( -8.0f * flPerc, 8.0f * flPerc );
+		sParticle->m_uchColor[0]	= alpha;
+		sParticle->m_uchColor[1]	= alpha;
+		sParticle->m_uchColor[2]	= alpha;
+		sParticle->m_uchStartAlpha	= alpha;
+		sParticle->m_uchEndAlpha	= 0;
+		sParticle->m_uchEndSize		= 0;
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Output : inline float
+//-----------------------------------------------------------------------------
+inline float C_MortarShell::GetStartPerc( void )
+{
+	float val = RemapValClamped( gpGlobals->curtime, m_flStarttime, m_flStarttime + m_flLifespan, 0.0f, 1.0f );
+
+	return ( Gain( val, 0.2f ) );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Output : inline float
+//-----------------------------------------------------------------------------
+inline float C_MortarShell::GetEndPerc( void )
+{
+	float val = RemapValClamped( gpGlobals->curtime, m_flStarttime + m_flLifespan, m_flStarttime + m_flLifespan + 1.0f, 1.0f, 0.0f );
+
+	return ( Gain( val, 0.75f ) );
+}
+
+#define	ALPHA_MIN	0.0f
+#define	ALPHA_MAX	1.0f
+
+#define	SCALE_MIN	8
+#define	SCALE_MAX	200
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+int C_MortarShell::DrawModel( int flags )
+{
+	if ( gpGlobals->frametime <= 0.0f )
+		return 0;
+
+	float flPerc;
+	bool ending;
+
+	// See if we're in the beginning phase
+	if ( gpGlobals->curtime < ( m_flStarttime + m_flLifespan ) )
+	{
+		flPerc = GetStartPerc();
+		ending = false;
+	}
+	else
+	{
+		flPerc = GetEndPerc();
+		ending = true;
+	}
+
+	float flAlpha = ALPHA_MIN + ( ( ALPHA_MAX - ALPHA_MIN ) * flPerc );
+	float flScale = ( ending ) ? m_flRadius : ( (m_flRadius*0.1f)+ ( ( m_flRadius - (m_flRadius*0.1f) ) * flPerc ) );
+
+	// Do the ground effect
+	FX_AddQuad( GetAbsOrigin() + ( m_vecSurfaceNormal * 2.0f ), 
+				m_vecSurfaceNormal, 
+				flScale,
+				flScale,
+				1.0f, 
+				flAlpha,
+				flAlpha,
+				1.0f,
+				0,
+				0,
+				Vector( 1.0f, 1.0f, 1.0f ),
+				0.0001f, 
+				"effects/combinemuzzle2_nocull",
+				0 );
+
+	if ( !ending )
+	{
+		// Add extra effects on startup
+		AddRisingParticles( flPerc );
+	}
+	else
+	{
+		// Add exploding particles after the impact
+		AddExplodingParticles( flPerc );
+	}
+
+	return 1;
+}