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game/client/warp_overlay.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: Screen warp overlay
+//
+// $NoKeywords: $
+//=============================================================================//
+#include "cbase.h"
+#include "view.h"
+#include "c_sun.h"
+#include "particles_simple.h"
+#include "clienteffectprecachesystem.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+CLIENTEFFECT_REGISTER_BEGIN( PrecacheEffectWarp )
+CLIENTEFFECT_MATERIAL( "sun/overlay" )
+CLIENTEFFECT_REGISTER_END()
+
+//-----------------------------------------------------------------------------
+// Purpose: Special draw for the warped overlay
+//-----------------------------------------------------------------------------
+void CWarpOverlay::Draw( bool bCacheFullSceneState )
+{
+	// Get the vector to the sun.
+	Vector vToGlow;
+	
+	if( m_bDirectional )
+		vToGlow = m_vDirection;
+	else
+		vToGlow = m_vPos - CurrentViewOrigin();
+
+	VectorNormalize( vToGlow );
+
+	float flDot = vToGlow.Dot( CurrentViewForward() );
+
+	if( flDot <= g_flOverlayRange )
+		return;
+
+	UpdateGlowObstruction( vToGlow, bCacheFullSceneState );
+	if( m_flGlowObstructionScale == 0 )
+		return;
+	
+	CMatRenderContextPtr pRenderContext( materials );
+	
+	//FIXME: Allow multiple?
+	for( int iSprite=0; iSprite < m_nSprites; iSprite++ )
+	{
+		CGlowSprite *pSprite = &m_Sprites[iSprite];
+
+		// Figure out the color and size to draw it.
+		float flHorzSize, flVertSize;
+		Vector vColor;
+		CalcSpriteColorAndSize( flDot, pSprite, &flHorzSize, &flVertSize, &vColor );
+	
+		// Setup the basis to draw the sprite.
+		Vector vBasePt, vUp, vRight;
+		CalcBasis( vToGlow, flHorzSize, flVertSize, vBasePt, vUp, vRight );
+
+		// Draw the sprite.
+		IMaterial *pMaterial = materials->FindMaterial( "sun/overlay", TEXTURE_GROUP_CLIENT_EFFECTS );
+		IMesh *pMesh = pRenderContext->GetDynamicMesh( false, 0, 0, pMaterial );
+
+		CMeshBuilder builder;
+		builder.Begin( pMesh, MATERIAL_QUADS, 1 );
+		
+		Vector vPt;
+
+		vPt = vBasePt - vRight + vUp;
+		builder.Position3fv( vPt.Base() );
+		builder.Color4f( VectorExpand(vColor), 1 );
+		builder.TexCoord2f( 0, 0, 1 );
+		builder.AdvanceVertex();
+
+		vPt = vBasePt + vRight + vUp;
+		builder.Position3fv( vPt.Base() );
+		builder.Color4f( VectorExpand(vColor), 1 );
+		builder.TexCoord2f( 0, 1, 1 );
+		builder.AdvanceVertex();
+
+		vPt = vBasePt + vRight - vUp;
+		builder.Position3fv( vPt.Base() );
+		builder.Color4f( VectorExpand(vColor), 1 );
+		builder.TexCoord2f( 0, 1, 0 );
+		builder.AdvanceVertex();
+
+		vPt = vBasePt - vRight - vUp;
+		builder.Position3fv( vPt.Base() );
+		builder.Color4f( VectorExpand(vColor), 1 );
+		builder.TexCoord2f( 0, 0, 0 );
+		builder.AdvanceVertex();
+		
+		builder.End( false, true );
+	}
+}