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game/client/hud_posture.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#include "cbase.h"
+#include "hud.h"
+#include "hudelement.h"
+#include "hud_numericdisplay.h"
+#include "hud_macros.h"
+#include "iclientmode.h"
+#include <vgui_controls/AnimationController.h>
+#include <vgui/ISurface.h>
+#include <vgui/ILocalize.h>
+#include <vgui_controls/Panel.h>
+#include <vgui/IVGui.h>
+
+
+using namespace vgui;
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+#define HUD_POSTURE_UPDATES_PER_SECOND	10
+#define HUD_POSTURE_FADE_TIME 0.4f
+#define CROUCHING_CHARACTER_INDEX 92  // index of the crouching dude in the TTF font
+
+//-----------------------------------------------------------------------------
+// Purpose: Shows the sprint power bar
+//-----------------------------------------------------------------------------
+class CHudPosture : public CHudElement, public vgui::Panel
+{
+	DECLARE_CLASS_SIMPLE( CHudPosture, vgui::Panel );
+
+public:
+	CHudPosture( const char *pElementName );
+	bool			ShouldDraw( void );
+
+#ifdef _X360 	// if not xbox 360, don't waste code space on this
+	virtual void	Init( void );
+	virtual void	Reset( void );
+	virtual void	OnTick( void );
+
+protected:
+	virtual void	Paint();
+
+	float	m_duckTimeout; /// HUD_POSTURE_FADE_TIME after the last known time the player was ducking
+
+private:
+
+	CPanelAnimationVar( vgui::HFont, m_hFont, "Font", "WeaponIconsSmall" );
+	CPanelAnimationVarAliasType( float, m_IconX, "icon_xpos", "4", "proportional_float" );
+	CPanelAnimationVarAliasType( float, m_IconY, "icon_ypos", "4", "proportional_float" );
+
+	enum { NOT_FADING, 
+		   FADING_UP, 
+		   FADING_DOWN
+	} m_kIsFading;
+#endif
+};	
+
+
+DECLARE_HUDELEMENT( CHudPosture );
+
+
+namespace
+{
+	// Don't pass a null pPlayer. Doesn't check for it.
+	inline bool PlayerIsDucking(C_BasePlayer *pPlayer)
+	{
+		return  pPlayer->m_Local.m_bDucked &&		 // crouching 
+				pPlayer->GetGroundEntity() != NULL ; // but not jumping
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Constructor
+//-----------------------------------------------------------------------------
+CHudPosture::CHudPosture( const char *pElementName ) : CHudElement( pElementName ), BaseClass( NULL, "HudPosture" )
+{
+	vgui::Panel *pParent = g_pClientMode->GetViewport();
+	SetParent( pParent );
+
+	SetHiddenBits( HIDEHUD_HEALTH | HIDEHUD_PLAYERDEAD | HIDEHUD_NEEDSUIT );
+
+	if( IsX360() )
+	{
+		vgui::ivgui()->AddTickSignal( GetVPanel(), (1000/HUD_POSTURE_UPDATES_PER_SECOND) );
+	}
+}
+
+//-----------------------------------------------------------------------------
+// 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 CHudPosture::ShouldDraw()
+{
+#ifdef _X360
+	return ( m_duckTimeout >= gpGlobals->curtime &&
+		CHudElement::ShouldDraw() );
+#else
+	return false;
+#endif
+}
+
+#ifdef _X360
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CHudPosture::Init( void )
+{
+	m_duckTimeout = 0.0f;
+	m_kIsFading = NOT_FADING;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CHudPosture::Reset( void )
+{
+	Init();
+}
+
+void CHudPosture::OnTick( void )
+{
+	C_BasePlayer *pPlayer = C_BasePlayer::GetLocalPlayer();
+	if (!pPlayer)
+		return;
+
+	if ( PlayerIsDucking(pPlayer) )
+	{
+		m_duckTimeout = gpGlobals->curtime + HUD_POSTURE_FADE_TIME; // kick the timer forward
+		if (GetAlpha() < 255)
+		{
+			// if not fully faded in, and not fading in, start fading in.
+			if (m_kIsFading != FADING_UP)
+			{
+				m_kIsFading = FADING_UP;
+				GetAnimationController()->RunAnimationCommand( this, "alpha", 255, 0, HUD_POSTURE_FADE_TIME, vgui::AnimationController::INTERPOLATOR_SIMPLESPLINE );
+			}
+		}
+		else
+		{
+			m_kIsFading = NOT_FADING;
+		}
+	}	
+	else // player is not ducking
+	{
+		if (GetAlpha() > 0)
+		{
+			// if not faded out or fading out, fade out.
+			if (m_kIsFading != FADING_DOWN)
+			{
+				m_kIsFading = FADING_DOWN;
+				GetAnimationController()->RunAnimationCommand( this, "alpha", 0, 0, HUD_POSTURE_FADE_TIME, vgui::AnimationController::INTERPOLATOR_SIMPLESPLINE );
+			}
+		}
+		else
+		{
+			m_kIsFading = NOT_FADING;
+		}
+	}
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: draws the posture elements we want.
+//-----------------------------------------------------------------------------
+void CHudPosture::Paint()
+{
+	C_BasePlayer *pPlayer = C_BasePlayer::GetLocalPlayer();
+	if ( !pPlayer )
+		return;
+
+	SetPaintBackgroundEnabled( true );
+
+	Color clr;
+	clr = gHUD.m_clrNormal;
+	clr[3] = 255;
+
+	// Pick the duck character
+	wchar_t duck_char = CROUCHING_CHARACTER_INDEX;
+
+	surface()->DrawSetTextFont( m_hFont );
+	surface()->DrawSetTextColor( clr );
+	surface()->DrawSetTextPos( m_IconX, m_IconY );
+	surface()->DrawUnicodeChar( duck_char );
+}
+
+#endif
+