pointInTriangle function

dynamic pointInTriangle(dynamic ax, dynamic ay, dynamic bx, dynamic by, dynamic cx, dynamic cy, dynamic px, dynamic py,)

Implementation

pointInTriangle(ax, ay, bx, by, cx, cy, px, py) {
  return (cx - px) * (ay - py) - (ax - px) * (cy - py) >= 0 &&
      (ax - px) * (by - py) - (bx - px) * (ay - py) >= 0 &&
      (bx - px) * (cy - py) - (cx - px) * (by - py) >= 0;
}