garymcm

/**
 * Bresenhams line algorithm for integers.
 * @see https://en.wikipedia.org/wiki/Bresenham%27s_line_algorithm#Algorithm_for_integer_arithmetic
 */
function plotLine(x0, y0, x1, y1) {
  /** Step direction on the x-axis */
  let sx = x0 < x1 ? 1 : -1
  /** Step direction on the y-axis */
  let sy = y0 < y1 ? 1 : -1