Data commit

Task/Superellipse/Wren/superellipse.wren

@@ -0,0 +1,57 @@
+import "graphics" for Canvas, Color, Point
+
+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)
+        }
+    }
+}