Processing入門 Java編5: メディア

color
https://processing.org/reference/color_datatype.html

color()
https://processing.org/reference/color_.html

loadImage()
https://processing.org/reference/loadImage_.html

image()
https://processing.org/reference/image_.html

PImage#resize()
https://processing.org/reference/PImage_resize_.html

PImage#get()
https://processing.org/reference/PImage_get_.html

PImage#set()
https://processing.org/reference/PImage_set_.html

PImage#filter()
https://processing.org/reference/PImage_filter_.html

void setup() {
  size(800, 600);
  background(0);
}

void draw() {
}

PImage character;

color c = color(0);

void setup() {
  size(800, 600);
  background(0);
  character = loadImage("character.png");
  character.resize(0, 600);
  character.filter(GRAY);
}

void draw() {
  image(character, 0, 0);
}

void mouseClicked() {
  c = character.get(mouseX, mouseY);
}

void mouseDragged() {
  character.set(mouseX, mouseY, c);
}