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git-svn-id: https://reactphysics3d.googlecode.com/svn/trunk@34 92aac97c-a6ce-11dd-a772-7fcde58d38e6
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chappuis.daniel 2009-02-04 12:40:33 +00:00
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sources/reactphysics3d/Vector3D.cpp
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/****************************************************************************
* Copyright (C) 2009 Daniel Chappuis *
****************************************************************************
* This file is part of ReactPhysics3D. *
* *
* ReactPhysics3D 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 3 of the License, or *
* (at your option) any later version. *
* *
* ReactPhysics3D 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 ReactPhysics3D. If not, see <http://www.gnu.org/licenses/>. *
***************************************************************************/
// Libraries
#include "Vector3D.h"
#include <iostream>
// Namespaces
using namespace reactphysics3d;
// Constructor of the class Vector3D
Vector3D::Vector3D()
:x(0.0), y(0.0), z(0.0) {
}
// Constructor with arguments
Vector3D::Vector3D(double x, double y, double z)
:x(x), y(y), z(z) {
}
// Copy-constructor
Vector3D::Vector3D(const Vector3D& vector)
:x(vector.x), y(vector.y), z(vector.z) {
}
// Destructor
Vector3D::~Vector3D() {
}
// Return the corresponding unit vector
Vector3D Vector3D::getUnit() const throw(MathematicsException) {
double lengthVector = length();
// Check if the length is equal to zero
if (lengthVector != 0) {
// Compute and return the unit vector
double lengthInv = 1.0 / lengthVector;
return Vector3D(x * lengthInv, y * lengthInv, z*lengthInv);
}
else {
// Throw an exception because the length of the vector is zero
throw MathematicsException("MathematicsException : Impossible to compute the unit vector because the length of the vector is zero");
}
}
// Overloaded operator for addition
Vector3D Vector3D::operator+(const Vector3D& vector) const {
// Compute and return the sum of the two vectors
return Vector3D(x + vector.x, y + vector.y, z + vector.z);
}
// Overloaded operator for substraction
Vector3D Vector3D::operator-(const Vector3D& vector) const {
// Compute and return the substraction of the two vectors
return Vector3D(x - vector.x, y - vector.y, z - vector.z);
}
// Overloaded operator for multiplication with a number
Vector3D Vector3D::operator*(double number) const {
// Compute and return the result
return Vector3D(x * number, y * number, z * number);
}
// Overloaded operator for the assignement to a Vector
Vector3D& Vector3D::operator=(const Vector3D& vector) {
// Check for self-assignment
if (this != &vector) {
// Copy the vector
x = vector.x;
y = vector.y;
z = vector.z;
}
// Return a reference to the vector
return *this;
}