Squares filling grid

in Programming Questions • 1 year ago

hey guys!

I'm trying to write a program similar to a celular automata, but simpler. I'm new to programming, so I'm having trouble with simple problems. My initial program is a grid with 99x99 cells. The cells are gradually filled with squares from the center(49x49) to the corners at random positions, like a central pixel that grows and forms random shapes.

I would like to know a way to test if a cell or its neighbours are already filled with a square, can someone help me?

Thanks! o/

Replies(5)

Chrisir

Re: Squares filling grid

1 year ago

It's hard to tell, since you don't show code

plaese post it

when you have an array of boolean you could check with

if (grid[i][j]) {
}

archeku

Re: Squares filling grid

1 year ago

Thanks for the answer!

Sorry, I didn't post it because I'm only doing tests to learn how the thing works. I just wrote this sketch:

float[] gridX = new float[99];
float[] gridY = new float[99];
float largura = 8.62;
float altura = 4.85;
int x=49;
int y=49;
void setup() {
size(853, 480);
frameRate(24);
fill(0);
noStroke();
rectMode(CORNER);
for(int x = 0; x < 99; x ++) {
gridX[x] = x*8.62;
}
for(int y = 0; y < 99; y ++) {
gridY[y] = y*4.85;
}
}
void draw() {
if(x < 99 && y < 99) {
rect(gridX[x], gridY[y], largura, altura);
x = constrain(x + round(random(-1, 1)), 0, 98);
y = constrain(y + round(random(-1, 1)), 0, 98);
}
}

I know it's a pretty bad code, but I had to begin with something =P

thanks for your help.

calsign

Re: Squares filling grid

1 year ago

First, some Notes:

It's easier, in this scenario, to use Two-dimensional Arrays.
I will explain using them...

Problem:

That's pretty easy...

if(get((x + 1) * 8.62, y) == color(0)) //To the right
if(get((x - 1) * 8 .62, y) == color(0)) //To the left
if(get(x, (y + 1) * 4.85) == color(0)) //Bottom
//Etc...

It should be trivial to find the boxes to the top, top-right, bottom-right, etc.
I didn't test the code, but it should work...

Also, why are you using such abnormal numbers for spacing your boxes? (I understand that it fits your window dimensions, but still...)
Most people would use something like 10 or 5...

archeku

Re: Squares filling grid

1 year ago

Thanks for your help!

It's like you said, I used those numbers to fit my window dimensions. I Don't have any programming skills, so it's a little difficult to me to understand what can be better. I'm not used to think with logical expressions and numbers, only with shapes and colors. But I'm trying!

Chrisir

Re: Squares filling grid

1 year ago

you can use numbers like 5 and 8 for largura and altura
and make the window size accordingly (with size)

float[] gridX = new float[99];
float[] gridY = new float[99];
float largura = 8;
float altura = 5;
int x=49;
int y=49;
void setup() {
size(int(largura*99), int(altura*99));
frameRate(24);
fill(0);
noStroke();
rectMode(CORNER);
for (int x = 0; x < 99; x ++) {
gridX[x] = x*largura;
rect(gridX[x], gridY[y], largura, altura); // delete this
}
for (int y = 0; y < 99; y ++) {
gridY[y] = y*altura;
rect(gridX[x], gridY[y], largura, altura); // delete this
}
}
void draw() {
if (x < 99 && y < 99) {
rect(gridX[x], gridY[y], largura, altura);
x = constrain(x + round(random(-1, 1)), 0, 98);
y = constrain(y + round(random(-1, 1)), 0, 98);
}
}

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