range.h

Go to the documentation of this file.

/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
 *
 * This library is open source and may be redistributed and/or modified under
 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
 * (at your option) any later version.  The full license is in LICENSE file
 * included with this distribution, and on the openscenegraph.org website.
 *
 * 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
 * OpenSceneGraph Public License for more details.
*/
//osgParticle - Copyright (C) 2002 Marco Jez

#ifndef OSGPARTICLE_RANGE
#define OSGPARTICLE_RANGE 1

// include Export simply to disable Visual Studio silly warnings.
#include <osgParticle/Export>

#include <stdlib.h>

#include <osg/Vec2>
#include <osg/Vec3>
#include <osg/Vec4>

namespace osgParticle
{

    template<class ValueType> struct range
    {

        ValueType minimum;

        ValueType maximum;

        range() : minimum(ValueType()), maximum(ValueType()) {}

        range(const ValueType& mn, const ValueType& mx) : minimum(mn), maximum(mx) {}

        void set(const ValueType& mn, const ValueType& mx) { minimum = mn; maximum = mx; }

        ValueType get_random() const
        {
            return minimum + (maximum - minimum) * rand() / RAND_MAX;
        }

        ValueType get_random_sqrtf() const
        {
            return minimum + (maximum - minimum) * sqrtf( static_cast<float>(rand()) / static_cast<float>(RAND_MAX) );
        }

        ValueType mid() const
        {
            return (minimum+maximum)*0.5f;
        }

    };

    typedef range<float> rangef;

    typedef range<osg::Vec2> rangev2;

    typedef range<osg::Vec3> rangev3;

    typedef range<osg::Vec4> rangev4;

}

#endif