subdivide static method

List<Point> subdivide(Point start, Point control1, Point control2, Point end, double t,)

Subdivides the cubic curve described by start, control1, control2, end.

The returned list describes two cubics, where elements 0, 1, 2, 3 are the start, cp1, cp2, and end points of the first cubic and 3, 4, 5, 6 are the start, cp1, cp2, and end points of the second cubic.

Implementation

static List<Point> subdivide(
  Point start,
  Point control1,
  Point control2,
  Point end,
  double t,
) {
  final Point ab = Point.lerp(start, control1, t);
  final Point bc = Point.lerp(control1, control2, t);
  final Point cd = Point.lerp(control2, end, t);
  final Point abc = Point.lerp(ab, bc, t);
  final Point bcd = Point.lerp(bc, cd, t);
  final Point abcd = Point.lerp(abc, bcd, t);
  return <Point>[
    start,
    ab,
    abc,
    abcd,
    bcd,
    cd,
    end,
  ];
}