Added original SDK code for Alien Swarm.

public/mathlib/vertexcolor.h

@@ -0,0 +1,121 @@
+//==== Copyright <20> 1996-2008, Valve Corporation, All rights reserved. =======//
+//
+// Purpose: A color format which works on 360 + PC
+//
+//===========================================================================//
+
+#ifndef VERTEXCOLOR_H
+#define VERTEXCOLOR_H
+
+#ifdef COMPILER_MSVC
+#pragma once
+#endif
+
+#include "tier0/platform.h"
+
+
+//-----------------------------------------------------------------------------
+// The challenge here is to make a color struct that works both on the 360
+// and PC, since the 360 is big-endian vs the PC which is little endian.
+//-----------------------------------------------------------------------------
+struct VertexColor_t
+{
+	// NOTE: This constructor is explicitly here to disallow initializers
+	// with initializer lists i.e. 
+	//     VertexColor_t color = { 255,   0,   0, 255 };
+	// which will totally fail on the 360.
+	VertexColor_t() {};
+	VertexColor_t( const VertexColor_t &src );
+	VertexColor_t( uint8 ir, uint8 ig, uint8 ib, uint8 ia );
+
+	// assign and copy by using the whole register rather than byte-by-byte copy. 
+	// (No, the compiler is not smart enough to do this for you. /FAcs if you 
+	// don't believe me.)
+	uint32 AsUint32() const; 
+	uint32 *AsUint32Ptr();
+	const uint32 *AsUint32Ptr() const; 
+
+	// assignment
+	VertexColor_t &operator=( const VertexColor_t &src );
+	VertexColor_t &operator=( const color32 &src );
+
+	// comparison
+	bool operator==( const VertexColor_t &src ) const;
+	bool operator!=( const VertexColor_t &src ) const;
+
+#ifdef PLATFORM_X360
+	// 360 is little endian
+	uint8 a, b, g, r;
+#else
+	uint8 r, g, b, a;
+#endif
+};
+
+
+//-----------------------------------------------------------------------------
+// Constructors
+//-----------------------------------------------------------------------------
+inline VertexColor_t::VertexColor_t( const VertexColor_t &src )
+{
+	*AsUint32Ptr() = src.AsUint32();
+}
+
+inline VertexColor_t::VertexColor_t( uint8 ir, uint8 ig, uint8 ib, uint8 ia ) : r(ir), g(ig), b(ib), a(ia)
+{
+}
+
+
+//-----------------------------------------------------------------------------
+// Cast to int
+//-----------------------------------------------------------------------------
+inline uint32 VertexColor_t::AsUint32() const
+{ 
+	return *reinterpret_cast<const uint32*>( this ); 
+}
+
+inline uint32 *VertexColor_t::AsUint32Ptr() 
+{ 
+	return reinterpret_cast<uint32*>( this ); 
+}
+
+inline const uint32 *VertexColor_t::AsUint32Ptr() const 
+{ 
+	return reinterpret_cast<const uint32*>( this ); 
+} 
+
+
+//-----------------------------------------------------------------------------
+// assignment
+//-----------------------------------------------------------------------------
+inline VertexColor_t &VertexColor_t::operator=( const VertexColor_t &src )
+{
+	*AsUint32Ptr() = src.AsUint32();
+	return *this;
+}
+
+inline VertexColor_t &VertexColor_t::operator=( const color32 &src )
+{
+	r = src.r;
+	g = src.g;
+	b = src.b;
+	a = src.a;
+	return *this;
+}
+
+
+//-----------------------------------------------------------------------------
+// comparison
+//-----------------------------------------------------------------------------
+inline bool VertexColor_t::operator==( const VertexColor_t &src ) const
+{
+	return AsUint32() == src.AsUint32();
+}
+
+inline bool VertexColor_t::operator!=( const VertexColor_t &src ) const
+{
+	return AsUint32() != src.AsUint32();
+}
+
+
+
+#endif // VERTEXCOLOR_H