pg.scale(1.0f / PApplet.pow(2, previous.zoom));
for (int i = 0; i < visibleKeys.size(); i++) {
Coordinate coord = (Coordinate) visibleKeys.get(i);
if (coord.zoom != previous.zoom) {
pg.popMatrix();
pg.pushMatrix();
pg.scale(1.0f / PApplet.pow(2, coord.zoom));
}
if (images.containsKey(coord)) {