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/*
This file is part of the Boson game
Copyright (C) 2002-2005 Rivo Laks (rivolaks@hot.ee)
Copyright (C) 2002-2005 Andreas Beckermann (b_mann@gmx.de)
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef BO3DTOOLSBASE_H
#define BO3DTOOLSBASE_H
#include <math.h>
#include "math/bomath.h"
#include "math/bovector.h"
#include "math/bomatrix.h"
// Degrees to radians conversion (AB: from mesa/src/macros.h)
#define DEG2RAD (M_PI/180.0)
// And radians to degrees conversion
#define RAD2DEG (180.0/M_PI)
/**
* @author Andreas Beckermann <b_mann@gmx.de>
* @short collection class for misc 3d functions
**/
class Bo3dToolsBase
{
public:
Bo3dToolsBase()
{
}
/**
* @return How many degrees you have to rotate around z-axis for y-axis to go
* through (x, y). (i.e. angle between (0, 1) and (x, y) when (x, y) is a
* normalized vector)
* @author Rivo Laks <rivolaks@hot.ee>
**/
static bofixed rotationToPoint(bofixed x, bofixed y);
/**
* This is the inverse operation to @ref rotationToPoint.
* It calculates point (x, y) which is at intersection of circle with @p radius
* and line which is rotated by @p angle around z-axis.
* @author Rivo Laks <rivolaks@hot.ee>
**/
static void pointByRotation(bofixed* x, bofixed* y, const bofixed& angle, const bofixed& radius);
static void pointByRotation(float* x, float* y, const float angle, const float radius);
/**
* Convert @p deg, given in degree, into radians.
* @return @p deg as radians.
**/
inline static bofixed deg2rad(bofixed deg) { return deg * DEG2RAD; }
/**
* Convert @p rad, given in radians, into degree.
* @return @p rad as degree.
**/
inline static bofixed rad2deg(bofixed rad) { return rad * RAD2DEG; }
};
#undef DEG2RAD
#undef RAD2DEG
#endif
/*
* vim:et sw=2
*/
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