Static set 

pub static set: SetInternalType

Changes the color of any pixel, or writes an image directly to the display window. The x and y parameters specify the pixel to change and the c parameter specifies the color value. This can be a p5.Color object, or [R, G, B, A] pixel array. It can also be a single grayscale value. When setting an image, the x and y parameters define the coordinates for the upper-left corner of the image, regardless of the current imageMode().

After using set(), you must call updatePixels() for your changes to appear. This should be called once all pixels have been set, and must be called before calling .get() or drawing the image.

Setting the color of a single pixel with set(x, y) is easy, but not as fast as putting the data directly into pixels[]. Setting the pixels[] values directly may be complicated when working with a retina display, but will perform better when lots of pixels need to be set directly on every loop. See the reference for pixels[] for more information.

Examples

let black = color(0);
set(30, 20, black);
set(85, 20, black);
set(85, 75, black);
set(30, 75, black);
updatePixels();

for (let i = 30; i < width - 15; i++) {
  for (let j = 20; j < height - 25; j++) {
    let c = color(204 - j, 153 - i, 0);
    set(i, j, c);
  }
}
updatePixels();

let img;
function preload() {
  img = loadImage('assets/rockies.jpg');
}

function setup() {
  set(0, 0, img);
  updatePixels();
  line(0, 0, width, height);
  line(0, height, width, 0);
}

Parameters

x x-coordinate of the pixel

y y-coordinate of the pixel

c insert a grayscale value | a pixel array | a p5.Color object | a p5.Image to copy