From d48ea5bb797037069d641da41da0f195f0124491 Mon Sep 17 00:00:00 2001 From: dan miller Date: Fri, 19 Oct 2007 05:20:48 +0000 Subject: one more for the gipper --- libraries/ode-0.9/include/ode/misc.h | 85 ++++++++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+) create mode 100644 libraries/ode-0.9/include/ode/misc.h (limited to 'libraries/ode-0.9/include/ode/misc.h') diff --git a/libraries/ode-0.9/include/ode/misc.h b/libraries/ode-0.9/include/ode/misc.h new file mode 100644 index 0000000..0c55fc5 --- /dev/null +++ b/libraries/ode-0.9/include/ode/misc.h @@ -0,0 +1,85 @@ +/************************************************************************* + * * + * Open Dynamics Engine, Copyright (C) 2001,2002 Russell L. Smith. * + * All rights reserved. Email: russ@q12.org Web: www.q12.org * + * * + * This library is free software; you can redistribute it and/or * + * modify it under the terms of EITHER: * + * (1) The GNU Lesser General Public License as published by the Free * + * Software Foundation; either version 2.1 of the License, or (at * + * your option) any later version. The text of the GNU Lesser * + * General Public License is included with this library in the * + * file LICENSE.TXT. * + * (2) The BSD-style license that is included with this library in * + * the file LICENSE-BSD.TXT. * + * * + * This library 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 files * + * LICENSE.TXT and LICENSE-BSD.TXT for more details. * + * * + *************************************************************************/ + +/* miscellaneous math functions. these are mostly useful for testing */ + +#ifndef _ODE_MISC_H_ +#define _ODE_MISC_H_ + +#include + + +#ifdef __cplusplus +extern "C" { +#endif + + +/* return 1 if the random number generator is working. */ +ODE_API int dTestRand(void); + +/* return next 32 bit random number. this uses a not-very-random linear + * congruential method. + */ +ODE_API unsigned long dRand(void); + +/* get and set the current random number seed. */ +ODE_API unsigned long dRandGetSeed(void); +ODE_API void dRandSetSeed (unsigned long s); + +/* return a random integer between 0..n-1. the distribution will get worse + * as n approaches 2^32. + */ +ODE_API int dRandInt (int n); + +/* return a random real number between 0..1 */ +ODE_API dReal dRandReal(void); + +/* print out a matrix */ +#ifdef __cplusplus +ODE_API void dPrintMatrix (const dReal *A, int n, int m, char *fmt = "%10.4f ", + FILE *f=stdout); +#else +ODE_API void dPrintMatrix (const dReal *A, int n, int m, char *fmt, FILE *f); +#endif + +/* make a random vector with entries between +/- range. A has n elements. */ +ODE_API void dMakeRandomVector (dReal *A, int n, dReal range); + +/* make a random matrix with entries between +/- range. A has size n*m. */ +ODE_API void dMakeRandomMatrix (dReal *A, int n, int m, dReal range); + +/* clear the upper triangle of a square matrix */ +ODE_API void dClearUpperTriangle (dReal *A, int n); + +/* return the maximum element difference between the two n*m matrices */ +ODE_API dReal dMaxDifference (const dReal *A, const dReal *B, int n, int m); + +/* return the maximum element difference between the lower triangle of two + * n*n matrices */ +ODE_API dReal dMaxDifferenceLowerTriangle (const dReal *A, const dReal *B, int n); + + +#ifdef __cplusplus +} +#endif + +#endif -- cgit v1.1