C:/Projects/ngn/include/vector3d.h

/***************************************************************************
 *            vector3d.h
 *
 *  Tue Sep  7 14:43:33 2004
 *  Copyright  2004  thierry schartz
 *  thierry.schartz@bluebottle.com
 ****************************************************************************/
/*
 *  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 Library 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.
 */
#ifndef VECTOR3D_H
#define VECTOR3D_H

#include <math.h>
#ifdef WIN32
#include <windows.h>
#pragma intrinsic( acos )
#endif


#include <iostream>
#include "build.h"

namespace ngn
{
        namespace core
        {
                class NGN_API Vector3df
        {
        public:
                Vector3df()
                        {
                                x = y = z = 0.0f;
                        }
                        // copy constructor
                        Vector3df( const Vector3df& other )
                        {
                                x = other.x;
                                y = other.y;
                                z = other.z;
                        }
                        // overloaded constructor
                Vector3df(float X, float Y, float Z ) 
                { 
                        x = X; 
                                y = Y; 
                                z = Z;
                }
                        Vector3df crossProduct( const Vector3df& v )
                        {
                                Vector3df vNormal;      
                                vNormal.x = ((y * v.z) - (z * v.y));
                                vNormal.y = ((z * v.x) - (x * v.z));
                                vNormal.z = ((x * v.y) - (y * v.x));
                                return vNormal;
                        }
                        float magnitude()
                        {
                                return (float)sqrt( (x*x) + (y*y) + (z*z) );
                        }
                        Vector3df normalize()
                        {
                                float magnitude = this->magnitude();    
                                Vector3df v = *this / magnitude;
                                return v;               
                        }
                        Vector3df vector( const Vector3df& v )
                        {
                                return *this - v;
                        }
                        float dotProduct( const Vector3df& V )
                        {
                                return ( ( x*V.x) + (y*V.y) + (z*V.z) );
                        }
                        double angle( Vector3df& v )
                        {
                                float dot = dotProduct( v );               
                                float vectorsMagnitude = v.magnitude() * magnitude();
                                double angle = acos( dot / vectorsMagnitude );
                                return( angle );
                        }
                        void incX( float step = 1.0f )
                {
                        x = x + step;
                        }
                        void incY( float step = 1.0f )
                {
                        y = y + step;
                        }
                        void incZ( float step = 1.0f )
                {
                        z = z + step;
                        }
                        void decX( float step = 1.0f )
                {
                        x = x - step;
                        }
                        void decY( float step = 1.0f )
                {
                        y = y - step;
                        }
                        void decZ( float step = 1.0f )
                {
                        z = z - step;
                        }
                        Vector3df operator+(Vector3df vVector)
                {
                        return Vector3df(vVector.x + x, vVector.y + y, vVector.z + z);
                }
                        void operator++()
                {
                         x = x + 1.0f;
                                 y = y + 1.0f;
                                 z = z + 1.0f;
                }
                        Vector3df operator-( Vector3df vVector )
                {
                        return Vector3df(x - vVector.x, y - vVector.y, z - vVector.z);
                }
                        void operator--()
                {
                                x = x - 1.0f;
                                y = y - 1.0f;
                                z = z - 1.0f;
                }
                Vector3df operator*(float num)
                {
                        
                        return Vector3df(x * num, y * num, z * num);
                }
                Vector3df operator/(float num)
                {
                        
                        return Vector3df(x / num, y / num, z / num);
                }
                        bool operator<( const Vector3df& v )
                        {
                                if( x < v.x && y < v.y && z < v.z )
                                        return true;
                                else 
                                        return false;
                        }
                        bool operator>( const Vector3df& v )
                        {
                                if( x > v.x && y > v.y && z > v.z )
                                        return true;
                                else 
                                        return false;
                        }
                        bool operator==( const Vector3df& v )
                        {
                                if( x == v.x && y == v.y && z == v.z )
                                        return true;
                                else 
                                        return false;
                        }
                        bool operator!=( const Vector3df& v )
                        {
                                if( x != v.x || y != v.y || z != v.z )
                                        return true;
                                else 
                                        return false;
                        }
                        friend std::ostream& operator << (std::ostream & flow, const Vector3df& v )
                        {
                        return (flow << "(" << v.x << ","<< v.y << "," << v.z << ")" ) ; 
                        }
                        
                
        
                float x, y, z;  
         
                                                
        };
        

        // integer 3D vector
        struct Vector3di
        {
                        int x, y, z;
            };
        
                        
                        
        }//core
}//ngn
#endif

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