marLine.cpp

Go to the documentation of this file.

#include "marLine.h"

// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
marLine::marLine(){
        this->a = 1;
        this->b = 1;
        this->c = 0;
}

// ----------------------------------------------------------------------------
marLine::marLine(double x1, double y1, double x2, double y2){
        this->a = y2 - y1;                      //REVISAR SIGNO
        this->b = (x1 - x2);
        this->c = (y1 - y2) * x1 + (x2 - x1)*y1;
}

// ----------------------------------------------------------------------------
marLine::marLine(double a, double b){
        this->a = a;
        this->b = b;
        this->c = 0;
}

// ----------------------------------------------------------------------------
void marLine::getNormal(double *a, double *b){
        *a = (this->b);
        *b = this->a;
}

// ----------------------------------------------------------------------------
void marLine::getIntersect(double a, double b, double c, double *x, double *y){

        if (this->a == a){
                *x = -1;
                *y = -1;
                return;
        }

        if (this->b == b){
                *x = -1;
                *y = -1;
                return;
        }

        *x = (c*this->b - this->c*b) / (this->a*b - a*this->b);

        if (this->b == 0){
                *y = -c/b;
        } else if (b == 0){
                *y = -this->c/this->b;
        } else {
                *y = (-this->a*(*x) - this->c) / this->b;
        }
        

        if (*x < 0 || *y < 0){
                *x = -1;
                *y = -1;
        }
        
}
// ----------------------------------------------------------------------------
double marLine::getA(){
        return a;
}

// ----------------------------------------------------------------------------
double marLine::getB(){
        return b;
}

// ----------------------------------------------------------------------------
double marLine::getC(){
        return c;
}

// ----------------------------------------------------------------------------
marLine::~marLine(){
}