Added most recent version of unmodified HL2 SDK for Orange Box engine

mathlib/halton.cpp

@@ -0,0 +1,30 @@
+//========= Copyright © 1996-2005, Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=====================================================================================//
+
+#include <halton.h>
+
+HaltonSequenceGenerator_t::HaltonSequenceGenerator_t(int b)
+{
+	base=b;
+	fbase=(float) b;
+	seed=1;
+
+}
+
+float HaltonSequenceGenerator_t::GetElement(int elem)
+{
+	int tmpseed=seed;
+	float ret=0.0;
+	float base_inv=1.0/fbase;
+	while(tmpseed)
+	{
+		int dig=tmpseed % base;
+		ret+=((float) dig)*base_inv;
+		base_inv/=fbase;
+		tmpseed/=base;
+	}
+	return ret;
+}