lib/maracasVisuLib/src/kernel/marLine.cpp

   1
   2 #include "marLine.h"
   3
   4 // ----------------------------------------------------------------------------
   5 // ----------------------------------------------------------------------------
   6 marLine::marLine(){
   7         this->a = 1;
   8         this->b = 1;
   9         this->c = 0;
  10 }
  11
  12 // ----------------------------------------------------------------------------
  13 marLine::marLine(double x1, double y1, double x2, double y2){
  14         this->a = y2 - y1;                      //REVISAR SIGNO
  15         this->b = (x1 - x2);
  16         this->c = (y1 - y2) * x1 + (x2 - x1)*y1;
  17 }
  18
  19 // ----------------------------------------------------------------------------
  20 marLine::marLine(double a, double b){
  21         this->a = a;
  22         this->b = b;
  23         this->c = 0;
  24 }
  25
  26 // ----------------------------------------------------------------------------
  27 void marLine::getNormal(double *a, double *b){
  28         *a = (this->b);
  29         *b = this->a;
  30 }
  31
  32 // ----------------------------------------------------------------------------
  33 void marLine::getIntersect(double a, double b, double c, double *x, double *y){
  34
  35         if (this->a == a){
  36                 *x = -1;
  37                 *y = -1;
  38                 return;
  39         }
  40
  41         if (this->b == b){
  42                 *x = -1;
  43                 *y = -1;
  44                 return;
  45         }
  46
  47         *x = (c*this->b - this->c*b) / (this->a*b - a*this->b);
  48
  49         if (this->b == 0){
  50                 *y = -c/b;
  51         } else if (b == 0){
  52                 *y = -this->c/this->b;
  53         } else {
  54                 *y = (-this->a*(*x) - this->c) / this->b;
  55         }
  56
  57
  58         if (*x < 0 || *y < 0){
  59                 *x = -1;
  60                 *y = -1;
  61         }
  62
  63 }
  64 // ----------------------------------------------------------------------------
  65 double marLine::getA(){
  66         return a;
  67 }
  68
  69 // ----------------------------------------------------------------------------
  70 double marLine::getB(){
  71         return b;
  72 }
  73
  74 // ----------------------------------------------------------------------------
  75 double marLine::getC(){
  76         return c;
  77 }
  78
  79 // ----------------------------------------------------------------------------
  80 marLine::~marLine(){
  81 }
  82