Initial data commit

Task/Pythagoras-tree/Sidef/pythagoras-tree.sidef

@@ -0,0 +1,46 @@
+require('Imager')
+
+func tree(img, x1, y1, x2, y2, depth) {
+
+    depth <= 0 && return()
+
+    var dx = (x2 - x1)
+    var dy = (y1 - y2)
+
+    var x3 = (x2 - dy)
+    var y3 = (y2 - dx)
+    var x4 = (x1 - dy)
+    var y4 = (y1 - dx)
+    var x5 = (x4 + 0.5*(dx - dy))
+    var y5 = (y4 - 0.5*(dx + dy))
+
+    # square
+    img.polygon(
+        points => [
+            [x1, y1],
+            [x2, y2],
+            [x3, y3],
+            [x4, y4],
+        ],
+        color => [0, 255/depth, 0],
+    )
+
+    # triangle
+    img.polygon(
+        points => [
+            [x3, y3],
+            [x4, y4],
+            [x5, y5],
+        ],
+        color => [0, 255/depth, 0],
+    )
+
+    tree(img, x4, y4, x5, y5, depth - 1)
+    tree(img, x5, y5, x3, y3, depth - 1)
+}
+
+var (width=1920, height=1080)
+var img = %O<Imager>.new(xsize => width, ysize => height)
+img.box(filled => 1, color => 'white')
+tree(img, width/2.3, height, width/1.8, height, 10)
+img.write(file => 'pythagoras_tree.png')