[Kuml-cvs] CVS: kuml/kuml_gui/src/ige/common MathUtility.h,NONE,1.1 MathUtility.cpp,NONE,1.1

[Darius S. <dst...@us...>]

Update of /cvsroot/kuml/kuml/kuml_gui/src/ige/common
In directory usw-pr-cvs1:/tmp/cvs-serv13849

Added Files:
	MathUtility.h MathUtility.cpp 
Log Message:
Added file

--- NEW FILE ---
/* Generated by Together */

#ifndef MATHUTILITY_H
#define MATHUTILITY_H

class QPoint;


/**
 * The utility class provides some needed math/geometric function.
 * All functions are static and may be used without creating an instance of this class.
 * @stereotype Utility 
 */
class MathUtility {
public:    

	/**
	  * The result we be stored in the variable r und fi
	  */
    static void convertKartToPolar(int x, int y, double& r, double& fi);

	/**
	  * The result we be stored in the variable r und fi
	  */
    static void convertKartToPolar(const QPoint& start, const QPoint& end, double & r, double & fi);

	/**
	  * The result we be stored in the variable x und y
	  */
    static void convertPolarToKart(double r, double fi, int& x, int& y);

//    static void convertPolarToKartAbs(double r, double fi, int& x, int& y);

    /**
     * Return degree between two points from 0 (0) to 2PI (360).
     * Right -- :0 (2PI)
     * Up := PI/2
     * Left := PI
     * Down := PI + PI/2 
     */
    static double getDegree(const QPoint & p1, const QPoint & p2);
};

#endif //MATHUTILITY_H

--- NEW FILE ---
/* Generated by Together */

#include "MathUtility.h"

#include <qpoint.h>
#include <math.h>
#include <stdlib.h>

double MathUtility::getDegree(const QPoint & p1, const QPoint & p2){
	double alpha;
	double fi;
	double deltaX;
	double deltaY;
	int x1 = p1.x();
	int y1 = p1.y();
	int x2 = p2.x();
	int y2 = p2.y();

	deltaX = abs(x1 - x2);
	deltaY = abs(y1 - y2);

	// First quadrant
	if((x1 < x2) && (y1 >= y2)) {
		fi = atan(deltaY/deltaX);
	}

	// Second quadrant
	if((x1 >= x2) && (y1 > y2)) {
		alpha = M_PI;
		fi = alpha - atan(deltaY/deltaX);
	}

	// Third quadrant
	if((x1 > x2) && (y1 <= y2)) {
		alpha = M_PI;
		fi = alpha + atan(deltaY/deltaX);
	}

	// Forth quadrant
	if((x1 <= x2) && (y1 < y2)) {
		alpha = M_PI + M_PI;
		fi = alpha - atan(deltaY/deltaX);
	}

	return fi;
}
/*void MathUtility::convertPolarToKartAbs(double r, double fi, int& x, int& y){
    x = getStartPoint().x();
    y = getStartPoint().y();
    x += int(r * cos(fi));
    y -= int(r * sin(fi));
}*/
void MathUtility::convertPolarToKart(double r, double fi, int& x, int& y){
    x = int(r * cos(fi));
    y = int(r * sin(fi));
}
void MathUtility::convertKartToPolar(const QPoint& start, const QPoint& end, double & r, double & fi){
    int x1 = start.x();
    int y1 = start.y();
    int x2 = end.x();
    int y2 = end.y();
    int deltaX = abs(x1 - x2);
    int deltaY = abs(y1 - y2);

    r = sqrt((deltaX*deltaX) + (deltaY*deltaY));
    fi = getDegree(start, end);
}
void MathUtility::convertKartToPolar(int x, int y, double& r, double& fi){
    r = sqrt((x*x) + (y*y));
    QPoint p1(0,0);
    QPoint p2(x,y);
    fi = getDegree(p1, p2);
}