Updates to maths and added the use of a 3D vector.

1 files changed, 71 insertions, 0 deletions

diff --git a/vec3d.h b/vec3d.h
new file mode 100644
index 0000000..5d424e8
--- /dev/null
+++ b/vec3d.h
@@ -0,0 +1,71 @@
+//
+//  glgrav - OpenGL N-Body gravity simulator
+//
+//  Copyright (C) 2003  Ian Cowburn (ianc@noddybox.demon.co.uk)
+//
+//  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 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
+//
+//  -------------------------------------------------------------------------
+//
+//  3D Vector
+//
+// $Id$
+//
+#ifndef VEC3D_H
+
+#define VEC3D_H
+
+#include "global.h"
+
+class Vec3D
+{
+public:
+    Vec3D();
+    Vec3D(double dx, double dy, double dz);
+    virtual ~Vec3D();
+
+    void Set(double dx, double dy ,double dz);
+
+    double dx() const;
+    double dy() const;
+    double dz() const;
+
+    bool IsNull() const;
+
+    double Length() const;
+
+    void Normalise();
+    void SetLength(double d);
+
+    void AddScalar(double d);
+    void Minus();
+    void Scale(double d);
+
+    void Add(const Vec3D& v);
+    void Subtract(const Vec3D& v);
+    void Scale(const Vec3D& v);
+
+    double DotProduct(const Vec3D& v);
+    Vec3D CrossProduct(const Vec3D& v);
+
+private:
+    double	m_dx;
+    double	m_dy;
+    double	m_dz;
+};
+
+#endif
+
+// END OF FILE //