Added original SDK code for Alien Swarm.

public/mathlib/simdvectormatrix.h

@@ -0,0 +1,142 @@
+//====== Copyright <20> 1996-2006, Valve Corporation, All rights reserved. =======//
+//
+// Purpose: Provide a class (SSE/SIMD only) holding a 2d matrix of class FourVectors,
+// for high speed processing in tools.
+//
+// $NoKeywords: $
+//
+//=============================================================================//
+
+#ifndef SIMDVECTORMATRIX_H
+#define SIMDVECTORMATRIX_H
+
+#ifdef _WIN32
+#pragma once
+#endif
+
+
+#include <string.h>
+#include "tier0/platform.h"
+#include "tier0/dbg.h"
+#include "tier1/utlsoacontainer.h"
+#include "mathlib/ssemath.h"
+
+class CSIMDVectorMatrix
+{
+public:
+	int m_nWidth;											// in actual vectors
+	int m_nHeight;
+
+	int m_nPaddedWidth;										// # of 4x wide elements
+
+	FourVectors *m_pData;
+
+protected:
+	void Init( void )
+	{
+		m_pData = NULL;
+		m_nWidth = 0;
+		m_nHeight = 0;
+		m_nPaddedWidth = 0;
+	}
+
+	int NVectors( void ) const
+	{
+		return m_nHeight * m_nPaddedWidth;
+	}
+
+public:
+	// constructors and destructors
+	CSIMDVectorMatrix( void )
+	{
+		Init();
+	}
+
+	~CSIMDVectorMatrix( void )
+	{
+		if ( m_pData )
+			delete[] m_pData;
+	}
+
+	// set up storage and fields for m x n matrix. destroys old data
+	void SetSize( int width, int height )
+	{
+		if ( ( ! m_pData ) || ( width != m_nWidth ) || ( height != m_nHeight ) )
+		{
+			if ( m_pData )
+				delete[] m_pData;
+			
+			m_nWidth = width;
+			m_nHeight = height;
+			
+			m_nPaddedWidth = ( m_nWidth + 3) >> 2;
+			m_pData = NULL;
+			if ( width && height )
+				m_pData = new FourVectors[ m_nPaddedWidth * m_nHeight ];
+		}
+	}
+
+	CSIMDVectorMatrix( int width, int height )
+	{
+		Init();
+		SetSize( width, height );
+	}
+
+	CSIMDVectorMatrix &operator=( CSIMDVectorMatrix const &src )
+	{
+		SetSize( src.m_nWidth, src.m_nHeight );
+		if ( m_pData )
+			memcpy( m_pData, src.m_pData, m_nHeight*m_nPaddedWidth*sizeof(m_pData[0]) ); 
+		return *this;
+	}
+
+	CSIMDVectorMatrix &operator+=( CSIMDVectorMatrix const &src );
+
+	CSIMDVectorMatrix &operator*=( Vector const &src );
+
+	// create from an RGBA float bitmap. alpha ignored.
+	void CreateFromRGBA_FloatImageData(int srcwidth, int srcheight, float const *srcdata );
+
+	// create from 3 fields in a csoa
+	void CreateFromCSOAAttributes( CSOAContainer const *pSrc,
+								   int nAttrIdx0, int nAttrIdx1, int nAttrIdx2 );
+
+	// Element access. If you are calling this a lot, you don't want to use this class, because
+	// you're not getting the sse advantage
+	Vector Element(int x, int y) const
+	{
+		Assert( m_pData );
+		Assert( x < m_nWidth );
+		Assert( y < m_nHeight );
+		Vector ret;
+		FourVectors const *pData=m_pData+y*m_nPaddedWidth+(x >> 2);
+
+		int xo=(x & 3);
+		ret.x=pData->X( xo );
+		ret.y=pData->Y( xo );
+		ret.z=pData->Z( xo );
+		return ret;
+	}
+
+	//addressing the individual fourvectors elements
+	FourVectors &CompoundElement(int x, int y)
+	{
+		Assert( m_pData );
+		Assert( y < m_nHeight );
+		Assert( x < m_nPaddedWidth );
+		return m_pData[x + m_nPaddedWidth*y ];
+	}
+
+	// math operations on the whole image
+	void Clear( void )
+	{
+		Assert( m_pData );
+		memset( m_pData, 0, m_nHeight*m_nPaddedWidth*sizeof(m_pData[0]) );
+	}
+
+	void RaiseToPower( float power );
+};
+
+
+
+#endif