Create Graphics
/**
* Create Graphics.
*
* The createGraphics() function creates an object from
* the PGraphics class. PGraphics is the main graphics and
* rendering context for Processing. The beginDraw() method
* is necessary to prepare for drawing and endDraw() is
* necessary to finish. Use this class if you need to draw
* into an off-screen graphics buffer or to maintain two
* drawing surfaces with different properties.
*/
PGraphics* pg;
void setup() {
size(640, 360);
pg = createGraphics(400, 200);
}
void draw() {
fill(0, 12);
rect(0, 0, width, height);
fill(255);
noStroke();
ellipse(mouseX, mouseY, 60, 60);
pg->beginDraw();
pg->background(51);
pg->noFill();
pg->stroke(255);
pg->ellipse(mouseX - 120, mouseY - 60, 60, 60);
pg->endDraw();
// Draw the offscreen buffer to the screen with image()
image(pg, 120, 60);
}