The "constructor" is the line inside your class (which is currently just: Square{}) that describes how a Square object is defined -- the "setup()" of your square, in a way.  The line you're trying to pass to the constructor is:

new Square((2 * i + 1) * Side + Side / 2, Cy + Side / 2, Side);

so it looks like your Square is intended to receive 3 numbers (floats?)

class Square{
 float num1, num2, num3; //  <-- these are owned by the square
 Square( float input1, float input2, float input3){
   // ^ this is the constructor.
   // usually you'll want to assign the variables being passed to the constructor:
   num1 = input1; // etc.
 }
}

Re: multiple posts on the board, you can delete the others.

sparky3189 wrote on Apr 15^th, 2010, 1:14am:

Bad syntax. Don't re-declare global variables. And use:
Sqs[i] = new Square((2 * i + 1) * Side + Side / 2, Cy + Side / 2, Side);
Or, rather:
Code:

Square square = new Square((2 * i + 1) * Side + Side / 2, Cy + Side / 2, Side);
Sqs[i] = square;
square.FillCol = Red;
square.Draw(); 

Of course, you also have to define Square's FillCol and Draw().
And probably call Draw() in draw(), instead.

I suppose FillCol is a fill color, it must be a field (a class variable) defined in the Square class. Then you have to use this value with fill() in the Draw() routine.
You have also to define a Draw() method (a class function) so each Square can draw itself, depending on the parameters of the object. BTW, try and find better name for your parameters, numx is quite obscure, x, y, and size, for example, are better.

Hello thought Id just post to say Ive gotten a bit further, the problem now seems to be that I cant get the letters themselves to appear on the boxes, any help would be appreciated!

Code;

String Legend = "Cat";
PFont Font;
int Letter;
int N = Legend.length();
int W = 40 * (2 * N + 1),
   H = W/2;
color Red = color(255, 0, 0),
     Yellow = color(255, 255, 0);
color BG_C = Yellow;
color SC = Red;
int Side = 40;
int Cy = (H - Side)/2;
Square[] Sqs = new Square[N];


void setup()
{
 Font = loadFont("BookmanOldStyle-Bold-24.vlw");
       textFont(Font);
 background(BG_C);
 int i;
 Square S;
 size(W, H);
   for(int j = 0; j < N; j++) {
     Square square = new Square(((3 + 4 * j) * Side)/2, H/2, Side);

           square.Draw();
               text(Legend.charAt(Letter));
          Letter=Letter+1;
  Sqs[j] = square;
 }
}

void draw()
{
 fill(SC);
 int i;
 Square S;
   for(i = 0; i < N; i++) {
     S = Sqs[i];
     S.Draw();
 }
}

Next tabs code;

class Square {
 int X,
     Y;
 int Side;
 color FontCol;
 color BoxCol=Red;

 Square(int X, int Y, int Side) {
   this.X = X;
   this.Y = Y;
   this.Side = Side;
 }

 void Draw() {
   fill(BoxCol);
   rectMode(CENTER);
   rect(X, Y, Side, Side);
   fill(FontCol);
   textAlign(CENTER);
   text(Letter,X,Y);

 }
}

Just to be clear I want the letters C a t to appear on the individual boxes, and if I were to change the Legend from cat to Plane there would be more boxes with a letter on each, hope thats clear! Thank you for the help!

Ive changed my code to;

String Legend = "Cat";
PFont Font;
int Letter;
int BoxLetter;
int N = Legend.length();
int W = 40 * (2 * N + 1),
   H = W/2;
color Red = color(255, 0, 0),
     Yellow = color(255, 255, 0);
color BG_C = Yellow;
color SC = Red;
int Side = 40;
int Cy = (H - Side)/2;
Square[] Sqs = new Square[N];


void setup()
{
 Font = loadFont("BookmanOldStyle-Bold-24.vlw");
       textFont(Font);
 background(BG_C);
 int i;
 Square S;
 size(W, H);
   for(int j = 0; j < N; j++) {
     Square square = new Square(((3 + 4 * j) * Side)/2, H/2, Side);

           square.Draw();
           
  Sqs[j] = square;
 }
}

void draw()
{
 fill(SC);
 int i;
 Square S;
   for(i = 0; i < N; i++) {
     S = Sqs[i];
     S.Draw();
 }
}



class Square {
 int X,
     Y;
 int Side;
 color FontCol;
 color BoxCol=Red;

 Square(int X, int Y, int Side) {
   this.X = X;
   this.Y = Y;
   this.Side = Side;
   BoxLetter=(Legend.charAt(Letter));
          Letter=Letter+1;
 }

 void Draw() {
   fill(BoxCol);
   rectMode(CENTER);
   rect(X, Y, Side, Side);
   fill(FontCol);
   textAlign(CENTER);
   text(BoxLetter,X,Y);

 }
}

But Im still getting the same problem :/

Quote:


No problems here.
I changed your call to loadFont to a call to createFont. You can change this back.
The problem was that you were only using one variable to track the current letter, and after setting up all the squares, that single variable was equal to the last letter.
What I did was add a new character to each square class, so each square remembers it's own letter.

Ok so Ive gotten everything to work and am now on the last part of my work, so I was wondering; what is the easiest way to transform my squares into circles once the mouse is click or after a delay?
Thanks again for any help!