Animation test;
BFont font;

void setup()
{
size(400,100);
font = loadFont("RotisSanSer.vlw.gz");
textFont(font, 20);

test = new Animation(this, loadImage("image.gif"), 100,40, 200,40);
}

void loop()
{
background(127);
test.draw();
float width = test.w(); // retrieve width of the animation-rectangle.
text("This animation is " + width + " pixels wide.", 25, 25);
}