Generate a square grid

Programming Questions

bright123

in Programming Questions • 4 months ago

hi im tying to to generate a square grid of 30 rows and 30 columns. the colour of each cell is randomly set. A new grid is displayed whenever any key is pressed.

got this code so far

int row = 30;

int col = 30;

color[] [] grid = new color [row] [col];

int cell_size = 20;

void setup()

{

background(255);

smooth();

size(600,600);

init_grid()

}

// ceate a gride of 30 rows and 30 colimns ad set the grid colour with random colours

void init_grid()

{

for(???)

{

for(?)

{

//set ramdom colours for the grid cells

grid [?] [?] = color(ramdom(0,255),ramdom(0,255),ramdom(0,255));

}

// display the grid wit filled in random colours

void draw_grid()

{

//2 for loops for rows and cols

// rect statemant , use of cell size

}

void keyPressed()

{

init_grid();

}

void draw()

{

draw_grid();

}

help plz

Replies(6)

GoToLoop

Re: Generate a square grid

4 months ago

I've got a past example similar to what you're requesting:

http://studio.processingtogether.com/sp/pad/export/ro.98-pSvW97Q-RE/latest

Source post is:

http://forum.processing.org/topic/basic-gui

1 difference is that this 1 just use 1 variable only (GRID) to determine the 2D (leds) dimensions.

Just replace GRID w/ ROW & COL if you need different sizes of rows & columns then.

Another 1 is that the 2D array is of data-type boolean[] and only stores 2 states -> either true or false.

Change its data-type to color[]. So you can store a full color value!

bright123

Re: Generate a square grid

4 months ago

thx but how can i make it random RGB colours and reset the window when ever i press a window?

GoToLoop

Re: Generate a square grid

4 months ago

To get a whole RGB spectrum, use -> (color) random (#000000);

Here's a sample which illustrates that:

// http://forum.processing.org/topic/processing-question
// http://forum.processing.org/topic/generate-a-square-grid
// http://studio.processingtogether.com/sp/pad/export/ro.9PDcp7xMBknWz/latest

final static byte SQUARES = 4;
final static color[] colors = new color[SQUARES];

// Choose JAVA2D, P2D, P3D or OPENGL:
final static String ENGINE = P2D;

void setup() {
  size(512, 512, ENGINE);
  frameRate(50);
  noLoop();
  noStroke();
  noCursor();
  rectMode(CORNERS);  // CORNER works too!

  mousePressed();
}

void draw() {
  fill(colors[0]);
  rect(0, 0, mouseX, mouseY);

  fill(colors[1]);
  rect(mouseX, 0, width, mouseY);

  fill(colors[2]);
  rect(0, mouseY, mouseX, height);

  fill(colors[3]);
  rect(mouseX, mouseY, width, height);
}

void mousePressed() {
  redraw();

  for ( byte c = SQUARES; c-- != 0; 
  colors[c] = (color) random(#000000) );             // Java
  //colors[c] = (int) random(0x1000000) | #000000);  // JS

  print(hex(colors[0]) + "\t");    // Java
  //println( hex(colors[0]) );     // JS
}

void mouseMoved() {
  redraw();
}

void mouseDragged() {
  redraw();
}