Pythagoras tree: Difference between revisions

Line 476:

@override

Widget build(BuildContext context) {

Widget build(BuildContext context) => FittedBox(

child: CustomPaint(painter: TreePainter(), size: const Size(2400, 1600)));

return FittedBox(

child: CustomPaint(

size: const Size(2360, 1580),

painter: TreePainter(),

⚫

),

);

}

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Line 483:

@override

void paint(Canvas canvas, Size size) {

canvas.translate(size.width / 2, size.height);

⚫

canvas.drawColor(Colors.white, BlendMode.src);

final stroke = Paint()

..style = PaintingStyle.stroke

..strokeWidth = 0.9

..color = Colors.white;

final fill = Paint()..style = PaintingStyle.fill;

⚫

canvas.drawColor(Colors.white, BlendMode.src);

var basis = [const (Offset(-200, 0), Offset(200, 0))];

const halfBase = Offset(200, 0);

var basis = [(size.bottomCenter(-halfBase), size.bottomCenter(halfBase))];

for (var lvl = 0; lvl < 12; lvl++) {

final path = Path();

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Line 497:

basis = [];

for (var (a, b) in basis0) {

final v = Offset(b~~.dx~~ - a.dx, ~~b.dy~~ - a.dy);

final v = Offset((b - a).dy, (a - b).dx);

final [c, d~~, w] = [a, b, v].map((p~~) => ~~Offset~~(~~p.dx~~ + v~~.dy~~, ~~p.dy~~ - v~~.dx)).toList(~~);

final (c, d) = (a + v, b + v);

final e = ~~Offset~~(c~~.dx~~ + ~~w.dx / 2, c.dy~~ + ~~w.dy~~ / 2);

final e = (c + d + v) / 2;

basis.addAll([(c, e), (e, d)]);

path.addPolygon([a, c, e, d, c, d, b], true);

}

rg(int step) => (80 + (lvl - 2) * step) & 255;

⚫

canvas

fill.color = Color.fromARGB(255, rg(20), rg(30), 18);

~~canvas~~.drawPath(path, fill);

..drawPath(path, fill..color = Color.fromARGB(255, rg(20), rg(30), 18))

~~canvas~~.drawPath(path, stroke);

..drawPath(path, stroke);

}