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game/client/tf2/c_shield_flat.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: Client's sheild entity
+//
+// $Workfile:     $
+// $Date:         $
+// $NoKeywords: $
+//=============================================================================//
+#include "cbase.h"
+#include "C_Shield.h"
+#include "tf_shieldshared.h"
+#include "c_basetfplayer.h"
+
+enum
+{
+	NUM_SUBDIVISIONS = 21,
+};
+
+#define EMP_WAVE_AMPLITUDE 6.0f
+#define EMP_GROW_WIDTH_DELAY 0.2f
+#define EMP_GROW_TIME 0.6f
+#define EMP_GROW_ATTEN 0.5f
+#define EMP_MIN_WIDTH 5.0f
+
+//-----------------------------------------------------------------------------
+// Flat version of the shield 
+//-----------------------------------------------------------------------------
+
+class C_ShieldFlat : public C_Shield
+{
+public:
+	DECLARE_CLASS( C_ShieldFlat, C_Shield );
+	DECLARE_CLIENTCLASS();
+
+	C_ShieldFlat();
+	~C_ShieldFlat();
+
+	virtual void GetBounds( Vector& mins, Vector& maxs );
+
+	virtual void AddEntity( );
+
+	virtual void SetDormant( bool bDormant );
+
+	// Return true if the panel is active 
+	virtual bool IsPanelActive( int x, int y );
+
+	// Gets at the control point data; who knows how it was made?
+	virtual void GetShieldData( Vector const** ppVerts, float* pOpacity, float* pBlend );
+	virtual const Vector& GetPoint( int x, int y );
+
+	// Draws the model
+	virtual int	DrawModel( int flags );
+
+public:
+	// networked data
+	unsigned char	m_ShieldState;
+	float			m_Width;
+	float			m_Height;
+
+	float			m_DeathFade;
+	float			m_EMPFade;
+
+private:
+	void	ShieldMoved( void );
+
+private:
+	C_ShieldFlat( const C_ShieldFlat& );
+	void ComputeEMPFade();
+	void ComputeDeathFade();
+	void ComputeSize( float& w, float& h );
+	void PreRender( );
+
+	Vector			m_pPositions[4];
+	Vector			m_Forward;
+	float			m_EnterPVSTime;
+
+	QAngle	m_LastAngles;
+	Vector	m_LastPosition;
+	Vector	m_Pos[4];
+};
+
+
+//-----------------------------------------------------------------------------
+// Data table
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_CLIENTCLASS_DT(C_ShieldFlat, DT_Shield_Flat, CShieldFlat)
+
+	RecvPropInt( RECVINFO(m_ShieldState) ),
+	RecvPropFloat( RECVINFO(m_Width) ),
+	RecvPropFloat( RECVINFO(m_Height) ),
+
+END_RECV_TABLE()
+
+
+//-----------------------------------------------------------------------------
+// Constructor, destructor
+//-----------------------------------------------------------------------------
+
+C_ShieldFlat::C_ShieldFlat()
+{
+	m_DeathFade = 1.0f;
+	m_EMPFade = 1.0f;
+
+	InitShield( 2, 2, 6 );
+}
+
+C_ShieldFlat::~C_ShieldFlat()
+{
+}
+
+//-----------------------------------------------------------------------------
+// Leaving/entering the PVS on the server.
+//-----------------------------------------------------------------------------
+
+void C_ShieldFlat::SetDormant( bool bDormant )
+{
+	if (!bDormant)
+	{
+		if (m_ShieldState & SHIELD_FLAT_EMP)
+		{
+			m_EMPFade = 0.0f;
+		}
+		else
+		{
+			m_EMPFade = 1.0f;
+		}
+
+		m_EnterPVSTime = 0.0f;
+		if (m_ShieldState & SHIELD_FLAT_INACTIVE)
+		{
+			m_DeathFade = 0.0f;
+		}
+		else
+		{
+			m_EnterPVSTime = gpGlobals->curtime;
+			m_DeathFade = 1.0f;
+		}
+	}
+
+	BaseClass::SetDormant(bDormant);
+}
+
+//-----------------------------------------------------------------------------
+// Figures the EMP fade factor
+//-----------------------------------------------------------------------------
+
+void C_ShieldFlat::ComputeEMPFade()
+{
+	if (m_ShieldState & SHIELD_FLAT_EMP)
+	{
+		// Decay fade if we've been EMPed or if we're inactive
+		if (m_EMPFade > 0.0f)
+		{
+			m_EMPFade -= gpGlobals->frametime / SHIELD_EMP_FADE_TIME;
+			if (m_EMPFade < 0.0f)
+			{
+				m_EMPFade = 0.0f;
+			}
+			else
+			{
+				Vector dir;
+
+				// Futz with the control points if we've been EMPed
+				for (int i = 0; i < 4; ++i)
+				{
+					float dist = -EMP_WAVE_AMPLITUDE * sin( i * M_PI * 0.5f + gpGlobals->curtime * M_PI / SHIELD_EMP_WOBBLE_TIME );
+					VectorMA( m_pPositions[i], dist, m_Forward, m_pPositions[i] );
+				}
+			}
+		}
+	}
+	else
+	{
+		// Fade back in, no longer EMPed
+		if (m_EMPFade < 1.0f)
+		{
+			m_EMPFade += gpGlobals->frametime / SHIELD_EMP_FADE_TIME;
+			if (m_EMPFade >= 1.0f)
+			{
+				m_EMPFade = 1.0f;
+			}
+		}
+	}
+}
+
+
+//-----------------------------------------------------------------------------
+// Figures the networked fade factor
+//-----------------------------------------------------------------------------
+
+void C_ShieldFlat::ComputeDeathFade()
+{
+	if (m_ShieldState & SHIELD_FLAT_INACTIVE)
+	{
+		// Fade out when we become inactive
+		if (m_DeathFade > 0.0f)
+		{
+			m_DeathFade -= gpGlobals->frametime / SHIELD_FLAT_SHUTDOWN_TIME;
+			if (m_DeathFade < 0.0f)
+			{
+				m_DeathFade = 0.0f;
+			}
+		}
+	}
+	else
+	{
+		// Active? We should be visible
+		m_DeathFade = 1.0f;
+	}
+}
+
+//-----------------------------------------------------------------------------
+// A little pre-render processing
+//-----------------------------------------------------------------------------
+
+void C_ShieldFlat::ComputeSize( float& w, float& h )
+{
+	w = m_Width;
+	h = m_Height;
+
+	float dt = gpGlobals->curtime - m_EnterPVSTime;
+	if (dt > EMP_GROW_TIME)
+	{
+		return;
+	}
+
+	if (dt < 0)
+		dt = 0.0f;
+
+	// Attenuate it up
+	w *= 1.0f - pow ( EMP_GROW_ATTEN, 10 * (dt / EMP_GROW_TIME ));
+
+	if (w < EMP_MIN_WIDTH)
+		w = EMP_MIN_WIDTH;
+}
+
+//-----------------------------------------------------------------------------
+// A little pre-render processing
+//-----------------------------------------------------------------------------
+
+void C_ShieldFlat::PreRender( )
+{
+	// Compute the shield positions...
+	Vector right, up;
+	AngleVectors( GetRenderAngles(), &m_Forward, &right, &up );
+
+	float w, h;
+	ComputeSize( w, h );
+
+	VectorMA( GetRenderOrigin(), -w * 0.5, right, m_pPositions[0] );
+	VectorMA( m_pPositions[0], -h * 0.5, up, m_pPositions[0] );
+	VectorMA( m_pPositions[0], w, right, m_pPositions[1] );
+	VectorMA( m_pPositions[0], h, up, m_pPositions[2] );
+	VectorMA( m_pPositions[2], w, right, m_pPositions[3] );
+
+	ComputeEMPFade();
+	ComputeDeathFade();
+
+	m_FadeValue = m_DeathFade * m_EMPFade;
+}
+
+void C_ShieldFlat::AddEntity( )
+{
+	BaseClass::AddEntity( );
+	PreRender();
+}
+
+//-----------------------------------------------------------------------------
+// Bounds computation
+//-----------------------------------------------------------------------------
+
+void C_ShieldFlat::GetBounds( Vector& mins, Vector& maxs )
+{
+	mins.Init( -1.0/16.0f, -m_Width * 0.5f, -m_Height * 0.5f );
+	maxs.Init(  1.0/16.0f,  m_Width * 0.5f,  m_Height * 0.5f );
+}
+
+//-----------------------------------------------------------------------------
+// Return true if the panel is active 
+//-----------------------------------------------------------------------------
+
+bool C_ShieldFlat::IsPanelActive( int x, int y )
+{
+	return true;
+}
+
+//-----------------------------------------------------------------------------
+// Gets at the control point data; who knows how it was made?
+//-----------------------------------------------------------------------------
+
+void C_ShieldFlat::GetShieldData( Vector const** ppVerts, float* pOpacity, float* pBlend )
+{
+	for ( int i = 0; i < 4; ++i )
+	{
+		ppVerts[i] = &m_pPositions[i];
+		pOpacity[i] = 32.0f;
+		pBlend[i] = 0.0f;
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Shield points
+//-----------------------------------------------------------------------------
+const Vector& C_ShieldFlat::GetPoint( int x, int y ) 
+{
+	if ((m_LastAngles != GetAbsAngles()) || (m_LastPosition != GetAbsOrigin() ))
+	{
+		ShieldMoved();
+	}
+
+	int i = (x >= 1);
+	i += (y >= 1) * 2;
+	return m_Pos[i];
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Computes the shield bounding box
+//-----------------------------------------------------------------------------
+void C_ShieldFlat::ShieldMoved( void )
+{
+	Vector forward, right, up;
+	AngleVectors( GetAbsAngles(), &forward, &right, &up );
+
+	VectorMA( GetAbsOrigin(), -m_Width * 0.5, right, m_Pos[0] );
+	VectorMA( m_Pos[0], -m_Height * 0.5, up, m_Pos[0] );
+	VectorMA( m_Pos[0], m_Width, right, m_Pos[1] );
+	VectorMA( m_Pos[0], m_Height, up, m_Pos[2] );
+	VectorMA( m_Pos[2], m_Width, right, m_Pos[3] );
+
+	m_LastAngles = GetAbsAngles();
+	m_LastPosition = GetAbsOrigin();
+}
+
+//-----------------------------------------------------------------------------
+// Suppress rendering if the player owns it
+//-----------------------------------------------------------------------------
+
+int	C_ShieldFlat::DrawModel( int flags )
+{
+	if ( !m_bReadyToDraw )
+		return 0;
+
+	// Don't draw it if the owner is the local player
+//	if ( m_OwnerEntity == C_BasePlayer::GetLocalPlayer()->index )
+//		return 0;
+
+	return BaseClass::DrawModel( flags );
+}
+