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game/client/hl2/hud_battery.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//
+//=============================================================================//
+//
+// battery.cpp
+//
+// implementation of CHudBattery class
+//
+#include "cbase.h"
+#include "hud.h"
+#include "hudelement.h"
+#include "hud_macros.h"
+#include "hud_numericdisplay.h"
+#include "iclientmode.h"
+
+#include "vgui_controls/AnimationController.h"
+#include "vgui/ILocalize.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+#define INIT_BAT	-1
+
+//-----------------------------------------------------------------------------
+// Purpose: Displays suit power (armor) on hud
+//-----------------------------------------------------------------------------
+class CHudBattery : public CHudNumericDisplay, public CHudElement
+{
+	DECLARE_CLASS_SIMPLE( CHudBattery, CHudNumericDisplay );
+
+public:
+	CHudBattery( const char *pElementName );
+	void Init( void );
+	void Reset( void );
+	void VidInit( void );
+	void OnThink( void );
+	void MsgFunc_Battery(bf_read &msg );
+	bool ShouldDraw();
+	
+private:
+	int		m_iBat;	
+	int		m_iNewBat;
+};
+
+DECLARE_HUDELEMENT( CHudBattery );
+DECLARE_HUD_MESSAGE( CHudBattery, Battery );
+
+//-----------------------------------------------------------------------------
+// Purpose: Constructor
+//-----------------------------------------------------------------------------
+CHudBattery::CHudBattery( const char *pElementName ) : BaseClass(NULL, "HudSuit"), CHudElement( pElementName )
+{
+	SetHiddenBits( HIDEHUD_HEALTH | HIDEHUD_NEEDSUIT );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CHudBattery::Init( void )
+{
+	HOOK_HUD_MESSAGE( CHudBattery, Battery);
+	Reset();
+	m_iBat		= INIT_BAT;
+	m_iNewBat   = 0;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CHudBattery::Reset( void )
+{
+	SetLabelText(g_pVGuiLocalize->Find("#Valve_Hud_SUIT"));
+	SetDisplayValue(m_iBat);
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CHudBattery::VidInit( void )
+{
+	Reset();
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Save CPU cycles by letting the HUD system early cull
+// costly traversal.  Called per frame, return true if thinking and 
+// painting need to occur.
+//-----------------------------------------------------------------------------
+bool CHudBattery::ShouldDraw( void )
+{
+	bool bNeedsDraw = ( m_iBat != m_iNewBat ) || ( GetAlpha() > 0 );
+
+	return ( bNeedsDraw && CHudElement::ShouldDraw() );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CHudBattery::OnThink( void )
+{
+	if ( m_iBat == m_iNewBat )
+		return;
+
+	if ( !m_iNewBat )
+	{
+	 	g_pClientMode->GetViewportAnimationController()->StartAnimationSequence("SuitPowerZero");
+	}
+	else if ( m_iNewBat < m_iBat )
+	{
+		// battery power has decreased, so play the damaged animation
+		g_pClientMode->GetViewportAnimationController()->StartAnimationSequence("SuitDamageTaken");
+
+		// play an extra animation if we're super low
+		if ( m_iNewBat < 20 )
+		{
+			g_pClientMode->GetViewportAnimationController()->StartAnimationSequence("SuitArmorLow");
+		}
+	}
+	else
+	{
+		// battery power has increased (if we had no previous armor, or if we just loaded the game, don't use alert state)
+		if ( m_iBat == INIT_BAT || m_iBat == 0 || m_iNewBat >= 20)
+		{
+			g_pClientMode->GetViewportAnimationController()->StartAnimationSequence("SuitPowerIncreasedAbove20");
+		}
+		else
+		{
+			g_pClientMode->GetViewportAnimationController()->StartAnimationSequence("SuitPowerIncreasedBelow20");
+		}
+	}
+
+	m_iBat = m_iNewBat;
+
+	SetDisplayValue(m_iBat);
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CHudBattery::MsgFunc_Battery( bf_read &msg )
+{
+	m_iNewBat = msg.ReadShort();
+}