/* === S Y N F I G ========================================================= */
-/*! \file noise.cpp
+/*! \file mod_noise/random.cpp
** \brief blehh
**
-** $Id: random.cpp,v 1.6 2005/01/17 02:00:19 darco Exp $
+** $Id$
**
** \legal
** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+** Copyright (c) 2007 Chris Moore
**
** This package is free software; you can redistribute it and/or
** modify it under the terms of the GNU General Public License as
#endif
#include "random.h"
+#include <synfig/quick_rng.h>
#include <cmath>
#include <cstdlib>
#endif
-// A fast 32-bit linear congruential random number generator
-class quick_rng
-{
- unsigned long next;
-public:
- quick_rng(unsigned long seed):next(seed) { }
-
- void set_seed(unsigned long x)
- {
- next=x;
- }
-
- unsigned long i32()
- {
- static const unsigned long a(1664525);
- static const unsigned long c(1013904223);
-
- return next=next*a+c;
- }
-
- unsigned long i16()
- {
- return i32()>>16;
- }
-
- float f()
- {
- static const float m(int(65535));
-
- return float(i16())/m;
- }
-};
-
/* === M A C R O S ========================================================= */
#define PI (3.1415927)
#define FT(i,j,k) ((*this)(subseed,i+x,j+y,k+t)*(R((i)-a)*R(b-(j))*R((k)-c)))
#define Z(i,j) ret+=F(i,j)
#define ZT(i,j,k) ret+=FT(i,j,k)
-#define X(i,j) // placeholder... To make box more symetric
-#define XT(i,j,k) // placeholder... To make box more symetric
+#define X(i,j) // placeholder... To make box more symmetric
+#define XT(i,j,k) // placeholder... To make box more symmetric
float a(xf-x), b(yf-y);