MT_Scalar.h

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/*
 * ***** BEGIN GPL 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.
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
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 * ***** END GPL LICENSE BLOCK *****
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/*

 * Copyright (c) 2000 Gino van den Bergen <gino@acm.org>
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.  Gino van den Bergen makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 *
 */

#ifndef MT_SCALAR_H
#define MT_SCALAR_H

#include <math.h>
#include <float.h>

#include "MT_random.h"
#include "NM_Scalar.h"

typedef double MT_Scalar; //this should be float !


const MT_Scalar  MT_DEGS_PER_RAD(57.29577951308232286465);
const MT_Scalar  MT_RADS_PER_DEG(0.01745329251994329547);
const MT_Scalar  MT_PI(3.14159265358979323846);
const MT_Scalar  MT_2_PI(6.28318530717958623200);
const MT_Scalar  MT_EPSILON(1.0e-10);
const MT_Scalar  MT_EPSILON2(1.0e-20);
const MT_Scalar  MT_INFINITY(1.0e50);

inline int       MT_sign(MT_Scalar x) {
    return x < 0.0 ? -1 : x > 0.0 ? 1 : 0;
}
 
inline MT_Scalar MT_abs(MT_Scalar x) { return fabs(x); }

inline bool      MT_fuzzyZero(MT_Scalar x) { return MT_abs(x) < MT_EPSILON; }
inline bool      MT_fuzzyZero2(MT_Scalar x) { return MT_abs(x) < MT_EPSILON2; }

inline MT_Scalar MT_radians(MT_Scalar x) { 
    return x * MT_RADS_PER_DEG;
}

inline MT_Scalar MT_degrees(MT_Scalar x) { 
    return x * MT_DEGS_PER_RAD;
}

inline MT_Scalar MT_random() { 
    return MT_Scalar(MT_rand()) / MT_Scalar(MT_RAND_MAX);
}

inline MT_Scalar MT_clamp(const MT_Scalar x, const MT_Scalar min, const MT_Scalar max)
{
    if (x < min)
        return min;
    else if (x > max)
        return max;
    return x;
}
#endif