debxyz
January 2, 2023, 10:18pm
1
Hello!
I’m trying to figure out where I can initialize a new random number of cells for each grid object. For example, the first grid might be divided 2 times, the second grid divided 7 times, etc…
The attached code runs, but all 4 grids have the same number of cell divisions…
Any guidance is most welcome!
Grid [] grid = new Grid[4]; //number of grids inside the overall grid
int div = int(random(2, 9)); //division of cells in each grid object
void setup() {
size(600, 600);
//noLoop();
frameRate(2);
int k = 0;
int counter = width/2; // equals "2"
for (int x = 0; x<width; x+=counter) {
for (int y = 0; y<height; y+=counter) {
pushMatrix();
translate(0, 0);
grid[k] = new Grid(div, x, y);
popMatrix();
k++;
}
}
}
void draw() {
strokeWeight(1);
//div = int(random(2, 9)); //division of cells in each grid object
for (Grid g : grid) {
g.display();
}
//grid of grids guide
pushStyle();
strokeWeight(2);
stroke(0, 255, 0);
line(width/2, 0, width/2, height);
line(0, height/2, width, height/2);
popStyle();
}
///////////////////////////////////////////////////////////
class Grid {
float divisions;
float sz;
float x;
float y;
Grid(float divisions_, float x_, float y_) {
divisions = divisions_;
sz = width/2/divisions;
x = x_;
y = y_;
}
void display() {
for (float i = 0; i<divisions; i++) {
for (float j = 0; j<divisions; j++) {
fill(random(150, 255), random(10), random(10));
rect(x+i*sz, y+j*sz, sz, sz); //top left
}
}
println(divisions);
}
}
1 Like
in setup()?
Grid [] grid = new Grid[4]; //number of grids inside the overall grid
int div = int(random(2, 9)); //division of cells in each grid object
void setup() {
size(600, 600);
//noLoop();
frameRate(2);
int k = 0;
int counter = width/2; // equals "2"
for (int x = 0; x<width; x+=counter) {
for (int y = 0; y<height; y+=counter) {
pushMatrix();
translate(0, 0);
div = int(random(2, 9)); //division of cells in each grid object
grid[k] = new Grid(div, x, y);
popMatrix();
k++;
}
}
}
void draw() {
strokeWeight(1);
//div = int(random(2, 9)); //division of cells in each grid object
for (Grid g : grid) {
g.display();
}
////grid of grids guide
//pushStyle();
//strokeWeight(2);
//stroke(0, 255, 0);
//line(width/2, 0, width/2, height);
//line(0, height/2, width, height/2);
//popStyle();
}
/////////////////////////
class Grid {
float divisions;
float sz;
float x;
float y;
Grid(float divisions_, float x_, float y_) {
divisions = divisions_;
sz = width/2/divisions;
x = x_;
y = y_;
}
void display() {
for (float i = 0; i<divisions; i++) {
for (float j = 0; j<divisions; j++) {
fill(random(150, 255), random(10), random(10));
rect(x+i*sz, y+j*sz, sz, sz); //top left
}
}
println(divisions);
}
}
1 Like
Grid [] grid = new Grid[16]; // number of grids inside the overall grid
int div; //division of cells in each grid object
void setup() {
size(600, 600);
frameRate(2);
strokeWeight(1);
int k = 0;
int counter = width/4; // equals "2"
for (int x = 0; x<width; x+=counter) {
for (int y = 0; y<height; y+=counter) {
div = int(random(2, 9)); //division of cells in each grid object
grid[k] = new Grid(div, x, y);
k++;
}
}
}
void draw() {
background(0);
for (Grid g : grid) {
if (g!=null)
g.display();
}
////grid of grids guide
//pushStyle();
//strokeWeight(2);
//stroke(0, 255, 0);
//line(width/2, 0, width/2, height);
//line(0, height/2, width, height/2);
//popStyle();
}
/////////////////////////
class Grid {
float divisions;
float sz;
float x;
float y;
int col1=int(random(256));
int col2=int(random(256));
// constr
Grid(float divisions_,
float x_, float y_) {
divisions = divisions_;
sz = width/4/divisions;
x = x_;
y = y_;
}// constr
void display() {
for (float i = 0; i<divisions; i++) {
for (float j = 0; j<divisions; j++) {
fill(random(150, 255), col1, col2);
// stroke(random(150, 255), col1, col2);
// noFill();
rect(x+i*sz, y+j*sz,
sz, sz);
}
}
println(divisions);
}
}//class
2 Likes
debxyz
January 3, 2023, 1:39am
4
Thank you @Chrisir !!
Oh yeah that works! At one point I had tried it in setup() BUT had placed it above the for loops…
And then regarding:
I’m curious about the purpose of line:
if(g! = null)
When would (or could) null happen? Is it some kind of built-in safety valve? Though for what reason I’m not sure. I did some googling, but…
2 Likes
I had null once when I set the upper bounds of the for loops in setup() to 1. (then only one quarter was drawn but the array still had full length.)
1 Like
