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Diffstat (limited to 'source/gameengine/GameLogic/SCA_RandomNumberGenerator.h')
-rw-r--r--source/gameengine/GameLogic/SCA_RandomNumberGenerator.h65
1 files changed, 65 insertions, 0 deletions
diff --git a/source/gameengine/GameLogic/SCA_RandomNumberGenerator.h b/source/gameengine/GameLogic/SCA_RandomNumberGenerator.h
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+/**
+ * Generate random numbers that can be used by other components. Each
+ * generator needs its own generator, so that the seed can be set
+ * on a per-generator basis.
+ *
+ * $Id$
+ *
+ * ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version. The Blender
+ * Foundation also sells licenses for use in proprietary software under
+ * the Blender License. See http://www.blender.org/BL/ for information
+ * about this.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): none yet.
+ *
+ * ***** END GPL/BL DUAL LICENSE BLOCK *****
+ */
+
+#ifndef __KX_RANDOMNUMBERGENERATOR
+#define __KX_RANDOMNUMBERGENERATOR
+
+
+class SCA_RandomNumberGenerator {
+
+ /** base seed */
+ long m_seed;
+
+ /* A bit silly.. The N parameter is a define in the .cpp file */
+ /** the array for the state vector */
+ /* unsigned long mt[N]; */
+ unsigned long mt[624];
+
+ /** mti==N+1 means mt[KX_MT_VectorLenght] is not initialized */
+ int mti; /* initialised in the cpp file */
+
+ /** Calculate a start vector */
+ void SetStartVector(void);
+ public:
+ SCA_RandomNumberGenerator(long seed);
+ ~SCA_RandomNumberGenerator();
+ unsigned long Draw();
+ float DrawFloat();
+ long GetSeed();
+ void SetSeed(long newseed);
+};
+
+#endif /* __KX_RANDOMNUMBERGENERATOR */