class Polygon {
  color fillColor;
  color strokeColor;
  int[] xCoord;
  int[] yCoord;
  int numVertex;
  int i = 0;
 
   Polygon(color f, color s, int v) {
    fillColor = f;
    strokeColor = s;
    numVertex = v;
    xCoord = new int[v];
    yCoord = new int[v]; 
   } 
  
  void addVertex(int x, int y) {
    if (i < numVertex) {
      xCoord[i] = x;
      yCoord[i] = y;
      // println ("ADDED: " + x + "," + y);
    i++;
    }
    else 
      println("ERROR: TOO MANY VERTS");
  }
  void addVertex() {
    if (i < numVertex) {
      xCoord[i] = int(random(0, width));
      yCoord[i] = int(random(0, height));
      // println ("ADDED: " + x + "," + y);
    i++;
    }
    else 
      println("ERROR: TOO MANY VERTS");
  }
  
  void replaceVertex(int vert) {
    if((vert >=0) && (vert < i)) {
      xCoord[vert] = int(random(0, width));
      yCoord[vert] = int(random(0, height));
    }
    
  }
  
  void replaceVertex(int vert, int x, int y) {
    if((vert >=0) && (vert < i)) {
      xCoord[vert] = x;
      yCoord[vert] = y;
    }
    
  }
  
  void drawPolygon() {
    fill(fillColor);
    stroke(strokeColor);
    beginShape();
    for(int j=0; j<i; j++) {
      vertex(xCoord[j], yCoord[j]);
    }
    //vertex(xCoord[0], yCoord[0]);
    endShape(CLOSE); 
    
  }
  
  
  
  
}