graphic.pde

double distance;
int gen;
int city_number;
PFont f;

BufferedReader reader;
String line;
String lx, ly;

int x_max, y_max;

class City {
    int x, y;
 
    public void setCoord(int x_pos, int y_pos){
        x = x_pos;
        y = y_pos;
    }
};

City[] cities_map; 
int[] current_path;

// The statements in the setup() function 
// run once when the program begins
void setup(){

    f = createFont("Arial", 16, true); 

    //Use the absolute path to data.txt file
    reader = createReader("/home/user/data.txt");
    
    //Read the grid size
    try {
        line = reader.readLine();
    } catch (IOException e) {
        e.printStackTrace();
        line = null;
    }
    
    String[] grid_coords = split(line, ',');
    
    //Read the city count
    try {
        line = reader.readLine();
    } catch (IOException e) {
        e.printStackTrace();
        line = null;
    }

    city_number = Integer.parseInt(line);
  
    surface.setSize(Integer.parseInt(grid_coords[0]), Integer.parseInt(grid_coords[1]));
    stroke(255);     // Set stroke color to white
    noLoop();
        
    cities_map = new City[city_number];
    current_path = new int[city_number];
        
    for (int i = 0; i < city_number; i++){
        cities_map[i] = new City();
        try {
            line = reader.readLine();
          
            String[] list = split(line, ',');
          
            if (list.length == 2){
            
                println("X: " + list[0] + " Y: " + list[1]);
            
                int x = Integer.parseInt(list[0]);
                int y = Integer.parseInt(list[1]);
                cities_map[i].setCoord(x,y);
            }
        } catch (IOException e) {
            e.printStackTrace();
            line = null;
        } 
    }
}

// The statements in draw() are run until the 
// program is stopped. Each statement is run in 
// sequence and after the last line is read, the first 
// line is run again.
void draw(){ 
    background(0);   // Set the background to black
  
    textFont(f);
    textAlign(LEFT);
  
    for (int i = 0; i < city_number; i++){
        ellipse(cities_map[i].x, cities_map[i].y, 5, 5);
    }
  
    try {
        line = reader.readLine();
    } catch (IOException e) {
        e.printStackTrace();
        line = null;
    }
  

    if (line == null){
        noLoop();
    } else {
        //println(line);
        String[] list = split(line, ' ');
        //println("1 : " + list[0] + " 2 : " + list[1]);
        gen = Integer.parseInt(list[0]);
        distance = Double.parseDouble(list[1]);
        
        for (int i = 2; i < city_number+2; i++){
            current_path[i-2] = Integer.parseInt(list[i]);
        }
    }

    text("Current generation: " + gen + " | Best length: " + distance , 10, 20);
        
    for (int i = 1; i < city_number; i++){
        int id1 = current_path[i-1];
        int id2 = current_path[i];
        line(cities_map[id1].x, cities_map[id1].y, cities_map[id2].x, cities_map[id2].y);
    }

    delay(100);
} 

void mousePressed(){
    if (looping){
        noLoop();
    } else {
        loop();
    }
}