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game/client/ViewConeImage.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: This is a panel which is rendered image on top of an entity
+//
+// $Revision: $
+// $NoKeywords: $
+//=============================================================================//
+#include "cbase.h"
+#include "ViewConeImage.h"
+#include <KeyValues.h>
+#include <vgui_controls/Panel.h>
+#include "VGuiMatSurface/IMatSystemSurface.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+//-----------------------------------------------------------------------------
+// initialization
+//-----------------------------------------------------------------------------
+bool CViewConeImage::Init( vgui::Panel *pParent, KeyValues* pInitData )
+{
+	Assert( pParent );
+
+	// Load viewcone material
+	if (!m_Image.Init( pParent->GetVPanel(), pInitData ))
+		return false;
+
+	// Position the view cone...
+	int viewconesize = pInitData->GetInt( "size", 32 );
+	m_Image.SetRenderSize( viewconesize, viewconesize );
+
+	int cx, cy;
+	pParent->GetSize( cx, cy );
+	m_Image.SetPos( (cx - viewconesize) / 2, (cy - viewconesize) / 2 );
+
+	return true;
+}
+
+//-----------------------------------------------------------------------------
+// Paint the sucka
+//-----------------------------------------------------------------------------
+void CViewConeImage::Paint( float yaw )
+{
+	g_pMatSystemSurface->DisableClipping( true );
+
+	m_Image.DoPaint( NULL, yaw );
+
+	g_pMatSystemSurface->DisableClipping( false );
+}
+
+void CViewConeImage::SetColor( int r, int g, int b )
+{
+	m_Image.SetColor( Color( r, g, b, 255 ) );
+}
+
+//-----------------------------------------------------------------------------
+// Helper method to initialize a view cone image from KeyValues data..
+// KeyValues contains the bitmap data, pSectionName, if it exists,
+// indicates which subsection of pInitData should be looked at to get at the
+// image data. The final argument is the bitmap image to initialize.
+// The function returns true if it succeeded.
+//
+// NOTE: This function looks for the key values 'material' and 'color'
+// and uses them to set up the material + modulation color of the image
+//-----------------------------------------------------------------------------
+bool InitializeViewConeImage( KeyValues *pInitData, const char* pSectionName, 
+	vgui::Panel *pParent, CViewConeImage* pViewConeImage )
+{
+	KeyValues *pViewConeImageSection;
+	if (pSectionName)
+	{
+		pViewConeImageSection = pInitData->FindKey( pSectionName );
+		if ( !pViewConeImageSection )
+			return false;
+	}
+	else
+	{
+		pViewConeImageSection = pInitData;
+	}
+
+	return pViewConeImage->Init( pParent, pViewConeImageSection );
+}
+