Peano curve: Difference between revisions

=={{header|Wren}}==

{{trans|Go}}

{{libheader|DOME}}

<lang ecmascript>import "graphics" for Canvas, Color, Point

import "dome" for Window

class Game {

static init() {

Window.title = "Peano curve"

Canvas.resize(820, 820)

Window.resize(820, 820)

Canvas.cls(Color.white) // white background

__points = []

__width = 81

peano(0, 0, __width, 0, 0)

var col = Color.rgb(255, 0, 255) // magenta

var prev = __points[0]

for (p in __points.skip(1)) {

var curr = p

Canvas.line(prev.x, prev.y, curr.x, curr.y, col)

prev = curr

}

}

static peano(x, y, lg, i1, i2) {

if (lg == 1) {

var px = (__width - x) * 10

var py = (__width - y) * 10

__points.add(Point.new(px, py))

return

}

lg = (lg/3).floor

peano(x+2*i1*lg, y+2*i1*lg, lg, i1, i2)

peano(x+(i1-i2+1)*lg, y+(i1+i2)*lg, lg, i1, 1-i2)

peano(x+lg, y+lg, lg, i1, 1-i2)

peano(x+(i1+i2)*lg, y+(i1-i2+1)*lg, lg, 1-i1, 1-i2)

peano(x+2*i2*lg, y+2*(1-i2)*lg, lg, i1, i2)

peano(x+(1+i2-i1)*lg, y+(2-i1-i2)*lg, lg, i1, i2)

peano(x+2*(1-i1)*lg, y+2*(1-i1)*lg, lg, i1, i2)

peano(x+(2-i1-i2)*lg, y+(1+i2-i1)*lg, lg, 1-i1, i2)

peano(x+2*(1-i2)*lg, y+2*i2*lg, lg, 1-i1, i2)

}

static update() {}

static draw(dt) {}

}</lang>