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git-svn-id: https://reactphysics3d.googlecode.com/svn/trunk@35 92aac97c-a6ce-11dd-a772-7fcde58d38e6
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chappuis.daniel
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/****************************************************************************
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* Copyright (C) 2009 Daniel Chappuis *
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****************************************************************************
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* This file is part of ReactPhysics3D. *
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* *
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* ReactPhysics3D is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation, either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* ReactPhysics3D is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with ReactPhysics3D. If not, see <http://www.gnu.org/licenses/>. *
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***************************************************************************/
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#ifndef VECTOR3D_H
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#define VECTOR3D_H
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// Libraries
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#include <cmath>
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#include "exceptions.h"
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// ReactPhysics3D namespace
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namespace reactphysics3d {
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/* -------------------------------------------------------------------
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Class Vector3D :
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This classrepresents 3 dimensionnal vector in space.
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-------------------------------------------------------------------
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*/
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class Vector3D {
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private :
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double x; // X component of the vector
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double y; // Y component of the vector
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double z; // Z component of the vector
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public :
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Vector3D(); // Constructor of the class Vector3D
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Vector3D(double x, double y, double z); // Constructor with arguments
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Vector3D(const Vector3D& vector); // Copy-constructor
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virtual ~Vector3D(); // Destructor
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double getX() const; // Get the x component of the vector
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double getY() const; // Get the y component of the vector
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double getZ() const; // Get the z component of the vector
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void setX(double x); // Set the x component of the vector
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void setY(double y); // Set the y component of the vector
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void setZ(double z); // Set the z component of the vector
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void setAllValues(double x, double y, double z); // Set all the values of the vector
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double length() const; // Return the lenght of the vector
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Vector3D getUnit() const throw(MathematicsException); // Return the corresponding unit vector
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double scalarProduct(const Vector3D& vector) const; // Scalar product of two vectors
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Vector3D crossProduct(const Vector3D& vector) const; // Cross product of two vectors
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// --- Overloaded operators --- //
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Vector3D operator+(const Vector3D& vector) const; // Overloaded operator for addition
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Vector3D operator-(const Vector3D& vector) const ; // Overloaded operator for substraction
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Vector3D operator*(double number) const; // Overloaded operator for multiplication with a number
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Vector3D& operator=(const Vector3D& vector); // Overloaded operator for the assignement to a Vector
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bool operator==(const Vector3D& vector) const; // Overloaded operator for the equality condition
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};
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// Get the x component of the vector (inline)
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inline double Vector3D::getX() const {
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return x;
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}
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// Get the y component of the vector (inline)
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inline double Vector3D::getY() const {
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return y;
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}
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// Get the z component of the vector (inline)
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inline double Vector3D::getZ() const {
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return z;
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}
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// Set the x component of the vector (inline)
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inline void Vector3D::setX(double x) {
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this->x = x;
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}
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// Set the y component of the vector (inline)
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inline void Vector3D::setY(double y) {
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this->y = y;
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}
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// Set the z component of the vector (inline)
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inline void Vector3D::setZ(double z) {
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this->z = z;
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}
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// Set all the values of the vector (inline)
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inline void Vector3D::setAllValues(double x, double y, double z) {
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this->x = x;
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this->y = y;
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this->z = z;
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}
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// Return the length of the vector (inline)
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inline double Vector3D::length() const {
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// Compute and return the length of the vector
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return sqrt(x*x + y*y + z*z);
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}
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// Scalar product of two vectors (inline)
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inline double Vector3D::scalarProduct(const Vector3D& vector) const {
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// Compute and return the result of the scalar product
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return (x * vector.x + y * vector.y + z * vector.z);
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}
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// Cross product of two vectors (inline)
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inline Vector3D Vector3D::crossProduct(const Vector3D& vector) const {
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// Compute and return the cross product
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return Vector3D(y * vector.z - z * vector.y, z * vector.x - x * vector.z , x * vector.y - y * vector.x);
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}
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// Overloaded operator for multiplication between a number and a Vector3D (inline)
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inline Vector3D operator * (double number, const Vector3D& vector) {
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// Compute and return the result vector
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return vector * number;
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}
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// Overloaded operator for the equality condition
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inline bool Vector3D::operator == (const Vector3D& vector) const {
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return (x == vector.x && y == vector.y && z == vector.z);
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}
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} // End of the ReactPhysics3D namespace
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#endif
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