/* * The ManaPlus Client * Copyright (C) 2007-2009 The Mana World Development Team * Copyright (C) 2009-2010 The Mana Developers * Copyright (C) 2011 The ManaPlus Developers * * This file is part of The ManaPlus Client. * * 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 * 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, see <http://www.gnu.org/licenses/>. */ #ifndef VECTOR_H #define VECTOR_H #include <math.h> #include <iostream> /** * Vector class. Represents either a 3D point in space, a velocity or a force. * Provides several convenient operator overloads. */ class Vector { public: /** * Constructor. */ Vector(): x(0.0f), y(0.0f), z(0.0f) {} /** * Constructor. */ Vector(float x, float y, float z = 0.0f): x(x), y(y), z(z) {} /** * Copy constructor. */ Vector(const Vector &v): x(v.x), y(v.y), z(v.z) {} /** * Returns true if all coordinates are set to 0, otherwise returns * false. */ bool isNull() const { return x == 0.0f && y == 0.0f && z == 0.0f; } /** * Scale vector operator. */ Vector operator*(float c) const { return Vector(x * c, y * c, z * c); } /** * In-place scale vector operator. */ Vector &operator*=(float c) { x *= c; y *= c; z *= c; return *this; } /** * Scale vector operator. */ Vector operator/(float c) const { return Vector(x / c, y / c, z / c); } /** * In-place scale vector operator. */ Vector &operator/=(float c) { x /= c; y /= c; z /= c; return *this; } /** * Add vector operator. */ Vector operator+(const Vector &v) const { return Vector(x + v.x, y + v.y, z + v.z); } /** * In-place add vector operator. */ Vector &operator+=(const Vector &v) { x += v.x; y += v.y; z += v.z; return *this; } /** * Subtract vector operator. */ Vector operator-(const Vector &v) const { return Vector(x - v.x, y - v.y, z - v.z); } /** * In-place subtract vector operator. */ Vector &operator-=(const Vector &v) { x -= v.x; y -= v.y; z -= v.z; return *this; } /** * Returns the length of this vector. This method does a relatively * slow square root. */ float length() const { return sqrtf(x * x + y * y + z * z); } /** * Returns the squared length of this vector. Avoids the square root. */ float squaredLength() const { return x * x + y * y + z * z; } /** * Returns the manhattan length of this vector. */ float manhattanLength() const { return fabsf(x) + fabsf(y) + fabsf(z); } /** * Returns a normalized version of this vector. This is a unit vector * running parallel to it. */ Vector normalized() const { const float l = length(); return Vector(x / l, y / l, z / l); } float x, y, z; }; /** * Appends a string representation of a vector to the output stream. */ std::ostream& operator <<(std::ostream &os, const Vector &v); #endif // VECTOR_H