dealing with species as matrix cells

[Suhad Faisal]

Hello 

my model is 

/**

 *  PeopleMoving

 *  Author: suhad

 *  Description: 

 */

model PeopleMoving

/* Insert your model definition here */

global { 

file Voronoi<-file('../includes/VoronoiVoronoi.shp');

file Peoplefile4<-file('../includes/41821.csv');

geometry   shape<- envelope(Voronoi);

float pos_x;

   float pos_y;  

   int   dens;

//  point location;

init { 

create Polygon from: Voronoi number:190;

create Tower   from: Voronoi header:true  

        with:[pos_x::float(read('pos_x')),pos_y::float(read('pos_y'))];

        location<-point([pos_x, pos_y]);

        

        create People from: Peoplefile4

        with:[dens::int(read('count')),pos_x::float(read('pos_x')),pos_y::float(read('pos_y'))

        ];

       location<-point([pos_x, pos_y]);

               }

  entities {

   species Polygon

    {  aspect  base {draw shape color: rgb([255,255,255]) ;} }

        

    species Tower

       {float pos_x; float pos_y; int   heading;

       

  aspect  Towericon {draw rectangle(1,800) color:rgb("red")

                    at:{location.x,location.y};

                    

                    }   // location size:15 rotate:90;

                                     

                    }

  species People

   {int dens;

   float pos_x;

   float pos_y;

  

 aspect basepeople {draw circle(dens) color:rgb("green") at:{location.x+rnd(300),location.y+rnd(300)}

   ;}

//draw shape (or circle() or whatever) at:{location.x+rnd(100),location.y+rnd(100)}

  }

}

}

 experiment City type: gui {

output { display disp 

{ 

     species Polygon  aspect: base  transparency: 0.9;

     species Tower    aspect: Towericon ;

     species People   aspect: basepeople;

  }

    }

  }

I want to give people a distance and direction according to the following equations:

Distance = [X(n)-X (n-1)]*[X(n)-X(n-1)] + [Y(n)-Y(n-1)]*[Y(n)-Y(n-1)]

Direction = arctan ((X(n)-X(n-1)) / (Y(n)-Y(n-1)))

but my problem is the embeding these aquation in the species data structure of species people ; means need to deal with pos_x, pos_y as matrix data with cell locations (i,j).

any advice please !

cheers 

suhad

[Patrick Taillandier]

Hi,

Same answer than the previous one: I do not understand at all your model.

If you a have a matrix "mat", you can access to all its element by using : "mat[i,j]"

Cheers,

Patrick

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