Function line

docs/demo/spritejs.js:14603–14605

(x1, y1, x2, y2)

}

function line(x1, y1, x2, y2) {
  return ['C', x1, y1, x2, y2, x2, y2];
}

function quadratic(x1, y1, cx, cy, x2, y2) {
  return ['C', x1 / 3 + 2 / 3 * cx, y1 / 3 + 2 / 3 * cy, x2 / 3 + 2 / 3 * cx, y2 / 3 + 2 / 3 * cy, x2, y2];