diff options
| -rw-r--r-- | src/CMakeLists.txt | 1 | ||||
| -rw-r--r-- | src/Makefile.am | 1 | ||||
| -rw-r--r-- | src/vector.cpp | 28 | ||||
| -rw-r--r-- | src/vector.h | 68 |
4 files changed, 93 insertions, 5 deletions
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt index 130452c6..94d25cc5 100644 --- a/src/CMakeLists.txt +++ b/src/CMakeLists.txt @@ -340,6 +340,7 @@ SET(SRCS textparticle.cpp textparticle.h tileset.h + vector.cpp vector.h ) diff --git a/src/Makefile.am b/src/Makefile.am index 1f23e328..d8aa5443 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -301,6 +301,7 @@ tmw_SOURCES = gui/widgets/resizegrip.cpp \ textparticle.cpp \ textparticle.h \ tileset.h \ + vector.cpp \ vector.h # set the include path found by configure diff --git a/src/vector.cpp b/src/vector.cpp new file mode 100644 index 00000000..7d5f055a --- /dev/null +++ b/src/vector.cpp @@ -0,0 +1,28 @@ +/* + * The Mana World + * Copyright 2007 The Mana World Development Team + * + * This file is part of The Mana World. + * + * The Mana World 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. + * + * The Mana World 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 The Mana World; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include "vector.h" + +std::ostream& operator <<(std::ostream &os, const Vector &v) +{ + os << "Vector(" << v.x << ", " << v.y << ", " << v.z << ")"; + return os; +} diff --git a/src/vector.h b/src/vector.h index b19f6c64..f32b201a 100644 --- a/src/vector.h +++ b/src/vector.h @@ -22,6 +22,10 @@ #ifndef _TMW_VECTOR_H_ #define _TMW_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. @@ -41,7 +45,7 @@ class Vector /** * Constructor. */ - Vector(float x, float y, float z): + Vector(float x, float y, float z = 0.0f): x(x), y(y), z(z) @@ -69,11 +73,12 @@ class Vector /** * In-place scale vector operator. */ - void operator*=(float c) + Vector &operator*=(float c) { x *= c; y *= c; z *= c; + return *this; } /** @@ -87,6 +92,17 @@ class Vector } /** + * 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 @@ -99,11 +115,12 @@ class Vector /** * In-place add vector operator. */ - void operator+=(const Vector &v) + Vector &operator+=(const Vector &v) { x += v.x; y += v.y; z += v.z; + return *this; } /** @@ -119,14 +136,55 @@ class Vector /** * In-place substract vector operator. */ - void operator-=(const Vector &v) + 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; }; -#endif +/** + * Appends a string representation of a vector to the output stream. + */ +std::ostream& operator <<(std::ostream &os, const Vector &v); + +#endif // _TMW_VECTOR_H_ |