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game/client/tf2/hud_emp.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+#include "cbase.h"
+#include "hud.h"
+#include "hudelement.h"
+#include <vgui_controls/Panel.h>
+#include "c_basetfplayer.h"
+#include "tf_shareddefs.h"
+#include "iclientmode.h"
+#include "clientmode_tfnormal.h"
+#include "materialsystem/imaterial.h"
+#include "materialsystem/imesh.h"
+#include "materialsystem/imaterialvar.h"
+#include <vgui_controls/Controls.h>
+#include <vgui/ISurface.h>
+#include "clienteffectprecachesystem.h"
+
+// EMP level positions
+#define HUDEMP_LEFT					((ScreenWidth() / 2)- XRES(40))
+#define HUDEMP_WIDTH				XRES(16)
+#define HUDEMP_TOP					YRES(210)
+#define HUDEMP_HEIGHT				YRES(16)
+
+// Changes per second
+#define HUDEMP_FRAMERATE			30.0f
+
+CLIENTEFFECT_REGISTER_BEGIN( PrecacheHudDamage )
+CLIENTEFFECT_MATERIAL( "Hud/emp/emp_damage" )
+CLIENTEFFECT_REGISTER_END()
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+bool GetEMPDamage()
+{
+	C_BaseTFPlayer *pPlayer;
+	pPlayer = C_BaseTFPlayer::GetLocalPlayer();
+	if ( !pPlayer )
+		return false;
+
+	return pPlayer->HasPowerup(POWERUP_EMP) ? true : false;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Icon showing EMP damage is occuring
+//-----------------------------------------------------------------------------
+class CHudEMP : public CHudElement, public vgui::Panel
+{
+	DECLARE_CLASS_SIMPLE( CHudEMP, vgui::Panel );
+
+public:
+	DECLARE_MULTIPLY_INHERITED();
+
+	CHudEMP( const char *pElementName );
+	~CHudEMP();
+
+	// vgui::Panel overrides.
+	virtual void Paint( void );
+
+	// CHudElement overrides.
+	virtual bool ShouldDraw( void );
+	virtual void Init( void );
+
+protected:
+	IMaterial		*m_pEMPIcon;
+	IMaterialVar	*m_pFrameVar;
+
+	float			m_flNextFrameChange;
+	int				m_nNumFrames;
+};
+
+//DECLARE_HUDELEMENT( CHudEMP, CHudEMP );
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+CHudEMP::CHudEMP( const char *pElementName ) :
+	CHudElement( pElementName ), vgui::Panel( NULL, pElementName )
+{
+	m_pEMPIcon = NULL;
+	m_pFrameVar = NULL;
+	m_flNextFrameChange = 0.0f;
+	m_nNumFrames = 1;
+	//SetPaintBackgroundEnabled( false );
+	SetAutoDelete( false );
+	SetName( "emp" );
+	
+	SetHiddenBits( HIDEHUD_HEALTH );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+CHudEMP::~CHudEMP( void )
+{
+	if ( m_pEMPIcon )
+	{
+		m_pEMPIcon->DecrementReferenceCount();
+		m_pEMPIcon = NULL;
+	}
+	SetParent( (vgui::Panel *)NULL );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Attach the jetpack bar to the main panel
+//-----------------------------------------------------------------------------
+void CHudEMP::Init( void )
+{
+	if ( !m_pEMPIcon )
+	{
+		m_pEMPIcon = materials->FindMaterial( "Hud/emp/emp_damage", TEXTURE_GROUP_VGUI );
+		assert( m_pEMPIcon );
+		m_pEMPIcon->IncrementReferenceCount();
+
+		m_pFrameVar = m_pEMPIcon->FindVar( "$frame", NULL, false );
+		m_nNumFrames = m_pEMPIcon->GetNumAnimationFrames();
+	}
+
+	SetPos( HUDEMP_LEFT, HUDEMP_TOP );
+	SetSize( HUDEMP_WIDTH, HUDEMP_HEIGHT );
+
+	vgui::Panel *pParent = GetClientModeNormal()->GetViewport();
+	SetParent(pParent);
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+bool CHudEMP::ShouldDraw( void )
+{
+	return ( CHudElement::ShouldDraw() && GetEMPDamage() );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Draw the jetpack level
+//-----------------------------------------------------------------------------
+void CHudEMP::Paint()
+{
+	// Rush label
+	int iX, iY;
+	GetPos( iX, iY );
+	int iWidth = XRES(16);
+	int iHeight = YRES(16);
+
+	if ( m_pFrameVar )
+	{
+		float curtime = gpGlobals->curtime;
+
+		if ( curtime >= m_flNextFrameChange )
+		{
+			m_flNextFrameChange = curtime + ( 1.0f / HUDEMP_FRAMERATE );
+
+			int frame = m_pFrameVar->GetIntValue();
+			frame++;
+			if ( frame >= m_nNumFrames )
+			{
+				frame = 0;
+			}
+			m_pFrameVar->SetIntValue(frame);
+		}
+	}
+
+	IMesh* pMesh = materials->GetDynamicMesh( true, NULL, NULL, m_pEMPIcon );
+
+	CMeshBuilder meshBuilder;
+	meshBuilder.Begin( pMesh, MATERIAL_QUADS, 1 );
+
+	meshBuilder.Color3f( 1.0, 1.0, 1.0 );
+	meshBuilder.TexCoord2f( 0,0,0 );
+	meshBuilder.Position3f( iX,iY,0 );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.Color3f( 1.0, 1.0, 1.0 );
+	meshBuilder.TexCoord2f( 0,1,0 );
+	meshBuilder.Position3f( iX+iWidth, iY, 0 );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.Color3f( 1.0, 1.0, 1.0 );
+	meshBuilder.TexCoord2f( 0,1,1 );
+	meshBuilder.Position3f( iX+iWidth, iY+iHeight, 0 );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.Color3f( 1.0, 1.0, 1.0 );
+	meshBuilder.TexCoord2f( 0,0,1 );
+	meshBuilder.Position3f( iX, iY+iHeight, 0 );
+	meshBuilder.AdvanceVertex();
+
+	meshBuilder.End();
+	pMesh->Draw();
+}
+