#include "contoursIntersection.h"

//Construction
contoursIntersection::contoursIntersection()
{
}
//Destruction
contoursIntersection::~contoursIntersection()
{
} 
//-----------------------------------------------------------
double contoursIntersection::Slope(double x0, double y0, double x1, double y1)
{
	double m = (y1-y0)/(x1-x0);
	return m;
}
//-----------------------------------------------------------
double contoursIntersection::Normal(double x0, double y0, double* m, double xi)
{
	double y;
	*m = -(1/(*m));
	y = ((*m)*(xi - x0)) + y0;
	return y;
}
//-----------------------------------------------------------
void contoursIntersection::Intersection(double x01, double y01, double x02, double y02, double mn, double m2, double* x, double* y)
{
	*x = ( y02-y01-(m2*x02)+(mn*x01) )/(mn-m2);
	*y = m2*(*x-x02)+y02;
}
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