Superellipse: Difference between revisions
Added Wren
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sca n=2.5
twoway function y=b*(1-(abs(x/a))^n)^(1/n), range(-200 200) || function y=-b*(1-(abs(x/a))^n)^(1/n), range(-200 200)</lang>
=={{header|Wren}}==
{{libheader|DOME}}
Uses Go's drawing code but produces a more complex image.
<lang ecmascript>import "graphics" for Canvas, Color, Point
import "dome" for Process
class Game {
static init() {
Canvas.resize(500, 500)
// draw 200 concentric superellipses with gradually decreasing 'n'.
for (a in 200..1) {
superEllipse(a/80, a)
}
}
static update() {}
static draw(alpha) {}
static superEllipse(n, a) {
var hw = Canvas.width / 2
var hh = Canvas.height / 2
// calculate y for each x
var y = List.filled(a + 1, 0)
for (x in 0..a) {
var aa = a.pow(n)
var xx = x.pow(n)
y[x] = (aa-xx).pow(1/n)
}
// draw quadrants
var prev = Point.new(hw + a, hh - y[a])
for (x in a-1..0) {
var curr = Point.new(hw + x, hh - y[x])
Canvas.line(prev.x, prev.y, curr.x, curr.y, Color.white)
prev = Point.new(curr.x, curr.y)
}
prev = Point.new(hw, hh + y[0])
for (x in 1..a) {
var curr = Point.new(hw + x, hh + y[x])
Canvas.line(prev.x, prev.y, curr.x, curr.y, Color.white)
prev = Point.new(curr.x, curr.y)
}
prev = Point.new(hw - a, hh + y[a])
for (x in a-1..0) {
var curr = Point.new(hw - x, hh + y[x])
Canvas.line(prev.x, prev.y, curr.x, curr.y, Color.white)
prev = Point.new(curr.x, curr.y)
}
prev = Point.new(hw, hh - y[0])
for (x in 1..a) {
var curr = Point.new(hw - x, hh - y[x])
Canvas.line(prev.x, prev.y, curr.x, curr.y, Color.white)
prev = Point.new(curr.x, curr.y)
}
}
}</lang>
=={{header|Yabasic}}==
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