In my quest to make a simple roguelike, I now have 2 very rudimentary sketches. 1 makes random rectangles appear on the screen, and one lets a player move @ around the screen. Now I would like to work on having the random rectangles not overlap, and @ not be able to move out of the rectangles.

So, I am wondering if the shape functions keep track of their coordinates, and whether this can be accessed somehow. I.e., if I make a line from x1 --> x10, can I get the line function to return the xs 1 --> 10. Otherwise, I plan on making an array of the coordinates from the x,y,w,h arguments I supply when the rectangles are formed (the rectangles are currently room objects). This would be redundant if I could just use the information from the rect() function (if it exists), e.g., dump the perimeter of the rectangle into a list which would become a part of the particular room object. Then, I when @ moves to cross the boundary of the room object, I could check the x,y, first. I also plan to use this data to prevent the rooms from overlapping (as they currently do, since they are supplied random x, y coords). Below are the two sketches (very basic, but they do what I ask, and I understand the code contained).

1. Room[] map; //random rectangles
   
   int roomnumber = 10;
   float xloc;
   float yloc;
   float w;
   float h;
   String roomname;
   
   void setup() {
     size(1000, 1000);
     frameRate(50);
     map = new Room[10];
     for (int i = 0; i < roomnumber; i++) {
       xloc = random(width * 0.75);
       yloc = random(height * 0.75);
       w = random(20, 300);
       h = random(20, 300);
       roomname = "room" + String.valueOf(i);
       map[i] = new Room(roomname, xloc, yloc, w, h);
     }
   }
   
   void draw() {
     background(0);
     for (Room room : map) {
       room.display();
     }
   }
   
   class Room {
     String name;
     float xpos;
     float ypos;
     float xdim;
     float ydim;
     Room (String tempname, float tempx, float tempy, float tempxdim, float tempydim) {
       name = tempname;
       xpos = tempx;
       ypos = tempy;
       xdim = tempxdim;
       ydim = tempydim;
     }
    
     void display() {
       stroke(255);
       fill('.');
       rectMode(CENTER);
       rect(xpos, ypos, xdim, ydim);
     }
    
   }
2. PFont f; //this is the @ walking
   float playerX;
   float playerY;
   float rectangleX;
   float rectangleY;
    
   void setup() {
     size(300,300);
     f = createFont("Arial",16,true);
     frameRate(30);
     rectMode(CENTER);
     rectangleX = width/2;
     rectangleY = height/2;
     playerX = rectangleX;
     playerY = rectangleY;
   }
   
   void draw() {
     background(0);
     stroke(255);
     fill(0);
     rect(rectangleX, rectangleY, 100, 100);
     textFont(f,16);                
     fill(255);
     text("@", playerX, playerY);
      
   }
   
    void keyPressed() {
       if (key == 'd') {
         playerX = playerX + 1;
       } else if (key == 'a') {
           playerX = playerX - 1;
       } else if (key == 'w') {
           playerY = playerY - 1;
       } else if (key == 's') {
           playerY = playerY + 1;
       }
     }