1 files changed, 28 insertions, 0 deletions
diff --git a/src/civetweb/src/third_party/duktape-1.5.2/examples/coffee/mandel.coffee b/src/civetweb/src/third_party/duktape-1.5.2/examples/coffee/mandel.coffee
new file mode 100644
index 000000000..8e3e170fe
--- /dev/null
+++ b/src/civetweb/src/third_party/duktape-1.5.2/examples/coffee/mandel.coffee
@@ -0,0 +1,28 @@
+mandel = (x0, y0, x1, y1, w, h, maxiter) ->
+  [dx, dy] = [(x1 - x0) / w, (y1 - y0) / h]
+  res = []
+
+  y = y0
+  for yc in [0..h-1]
+    x = x0
+    for xc in [0..w-1]
+      [xx, yy] = [x, y]
+      c = '*'
+      for i in [0..maxiter-1]
+        # (xx+i*yy)^2 + (x+i*y) = xx^2 + i*2*xx*yy - yy^2 + x + i*y
+        # = (xx^2 - yy^2 + x) + i*(2*xx*yy + y)
+        [xx2, yy2] = [xx*xx, yy*yy]
+        if xx2 + yy2 >= 4.0
+          c = '.'
+          break
+        [xx, yy] = [xx2 - yy2 + x, 2*xx*yy + y]
+      res.push(c)
+      x += dx
+    res.push('\n')
+    y += dy
+
+  print(res.join(''))
+  return
+
+mandel(-2, 2, 2, -2, 200, 100, 1000)
+