I'm trying to write a simple tic tac toe. I'm able to get the cell to have a "o" state when the mouse is pressed but when I attempt to write in an "x" state, it's acting really wonky. Ellipses seem to work fine, but other objects such as lines or rects don't seem to work. Can someone explain this to me....thanks in advance.

int cols=3;
int rows=3;

Cell[][] board= new Cell[cols][rows];

void setup() {
  size(300,300);
  smooth();

  for(int i=0; i<cols; i++) {
    for(int j=0; j<rows; j++) {
      board[i][j]= new Cell(i*100,j*100,100,100);
    }
  }
}
void draw() {
  for(int i=0; i<cols; i++) {
    for(int j=0; j<rows; j++) {
      board[i][j].display();
      board[i][j].checkCell();
    }
  }
}

//CELL CLASS

class Cell {
  float x;
  float y;
  float w;
  float h;
  int state;
  Cell (float _x, float _y, float _w, float _h) {
    x= _x;
    y= _y;
    w= _w;
    h= _h;
    state=0;
  }
  void display() {
   
    if(state== 0) {
      stroke(0);
    fill(255);
    rect(x,y,w,h);
    }

    else if(state== 1) {
      stroke(0);
    fill(255);
    rect(x,y,w,h);
     
      fill(255);
      ellipse(x+w/2, y+h/2,50,50);
    }

    else if (state== 2) {
      stroke(0);
    fill(255);
    rect(x,y,w,h);
     
      line(x+20,y+20,w-20,h-20);
      line(x+20,h-20,w-20,y+20);
    }
  }

  void checkCell() {
    if(mousePressed) {
      if (mouseButton== LEFT && mouseX > x && mouseX < x+w
        && mouseY > y && mouseY < y+h) {
        state= 1;
      }
      else if (mouseButton== RIGHT && mouseX > x && mouseX < x+w
        && mouseY > y && mouseY < y+h) {
        state= 2;
      }
    }
  }
}

I'm trying to learn 2D arrays in processing by creating a simple tic-tac-toe game. I tried to write a function that when the mouse is clicked it creates an ellipse. But I don't understand why it is only doing it for the top left square. Can anyone enlighten me? :) thanks in advance. Code is below:

int cols=3;
int rows=3;

Cell[][] board= new Cell[cols][rows];

void setup(){
  size(300,300);
  smooth();
 
  for(int i=0; i<cols; i++){
    for(int j=0; j<rows; j++){
      board[i][j]= new Cell(i*100,j*100,100,100);
    }
  }
}

void draw(){
  for(int i=0; i<cols; i++){
    for(int j=0; j<rows; j++){
      board[i][j].display();
      mousePressed(board[i][j]);
    }
  }
}

void mousePressed(Cell a){
    if (mouseButton== LEFT && mouseX > a.x && mouseX < a.w
    && mouseY > a.y && mouseY < a.h){
      a.state= 1;
    }
      else if (mouseButton== RIGHT && mouseX > a.x && mouseX < a.w
    && mouseY > a.y && mouseY < a.h){
      a.state= 0;
    }
  }

//CLASS CELL
class Cell {
  float x;
  float y;
  float w;
  float h;
  int state;
 
Cell (float _x, float _y, float _w, float _h){
  x= _x;
  y= _y;
  w= _w;
  h= _h;
}
 
  void display(){
    stroke(0);
    fill(255);
    rect(x,y,w,h);
    if(state==1){
      fill(255);
      ellipse(x+w/2, y+h/2,50,50);
    }
  }
}

Hi, I'm trying to write a function that gets the min value from an array but returns its index. But I keep on getting some errors. What am I doing wrong?

Here is the beginnings of my function:

int getIndex (float[] a) {
  for (int i=0; i < a.length; i++) {
    if (a[i] == min(a)) {
  return i;
    }
}
}

Another attempt, basically creating a float[] sqDist that takes a function mouseDist (basically a function that calculates the distance between the x-y of an object and the mouse) as its values. I then used an if statement to perhaps obtain the minimum value associated with the index. But it's giving an error saying that the variables for the function and the return function are not the same! What am I missing here?

int Indexget() {
  int gI;
  float[] sqDist = new float[squares.length];
  for (gI=0; gI < squares.length; gI++) {
    sqDist[gI] = mouseDist(squares[gI]);
    if (sqDist[gI] == min(sqDist)) {
      return gI;
    }
  }
  }   

thanks in advance!

 If I had wanted to compare elements within an array what equation would I need to write? So for example,

for int[] sample = new int[5]

If sample[i], were to be put into a for loop and cycle through

for (int i = 0; i < sample.length-1; i++) { }

the output would be:

1st loop
sample[0] with sample[1]
sample[0] with sample[2]
sample[0] with sample[3]
sample[0] with sample[4]

2nd loop
sample[1] with sample[2]
sample[1] with sample[3]
sample[1] with sample[4]

3rd loop
sample[2] with sample[3]
sample[2] with sample[4]

4th loop
sample[3] with sample[4]

Let's say for simplification, I have this is as my class:

class Pt {
  int posX;
  int posY;

  Pt(int _posX, int _posY) {
    posX = _posX;
    posY = _posY;
  }
}


So in another class, I have created a variable of type Pt[ ], as one of its variables/arguments. I made a function called void render () which draws an ellipse through a for loop. How would I access the value, of a variable/argument (posX), of an object Pt that is within an array? Is this possible?

I know that if it is just one instance, you would access it through: nameVariable.posX
if it's within an array how would you write it? nameVariable.posX[i]? I tried several things but it didn't work?

let's say, for variable Pt[] ptXY;


for (int i = 0; i < ptXY.length; i ++) {
      ellipse( [goes here], [goes here], Esize, Esize);
}

thank you.

What I currently have is a square that is following a "terrain". When the mouse is clicked anywhere on the screen, the square is grabbed. When the mouse is clicked again, it begins to walk everywhere on the screen.

What I would want to happen is that after the mouse is clicked and the square is grabbed that when the mouse is clicked again, the square starts at the left hand side of  the screen and follows the terrain once again.

I tried several things to no avail.

I was thinking that the problem was in the 'if' statement associated with the boolean mouseClick. But I'm not too sure.

I'm just trying to learn processing and I appreciate any help! :)

code is posted below:



boolean mouseClick = false;

float x = 0;
float y = 40;

float rectSize = 10;

float speed = 0.5;

int counter = 0;


void setup() {
  size(200,200);
}

void draw() {
  background(255);

  //terrain
  noFill();
  stroke(150);
  beginShape();
  vertex(0,50);
  vertex(30,50);
  vertex(30,130);
  vertex(80,130);
  vertex(80,170);
  vertex(width,170);
  endShape();

  //rectangle
  noStroke();
  fill(0);
  rect(x,y,rectSize,rectSize);

  if (counter == 0) {
    x += speed;
    if (x == 30) {
      counter = 1;
    }
  }
  else if (counter == 1) {
    y += speed;
    if (y == 120) {
      counter = 2;
    }
  }
  else if (counter == 2) {
    x += speed;
    if (x == 80) {
      counter = 3;
    }
  }
  else if (counter == 3) {
    y += speed;
    if (y ==160) {
      counter = 4;
    }
  }
  else if (counter == 4) {
    x += speed;
    if (x == width) {
      counter = 0;
      x = 0;
      y = 40;
    }
  }


  if (mouseClick) {
    x = mouseX;
    y = mouseY;
  }
 
 
}

void mousePressed () {
  mouseClick = !mouseClick;
}