From 7a89edd1e523ea3f8ef7ea289d76e009f3b6f3f4 Mon Sep 17 00:00:00 2001
From: "Peter J. Holzer" <hjp@wsr.ac.at>
Date: Sat, 29 Dec 2018 21:55:53 +0100
Subject: [PATCH] Draw generated hilbert curve

Get points from the generator one by one, drawing a line segment from
the last point to the current point after each using curses.
---
 Python/draw_hilbertgenerator | 38 ++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100755 Python/draw_hilbertgenerator

diff --git a/Python/draw_hilbertgenerator b/Python/draw_hilbertgenerator
new file mode 100755
index 0000000..2c453f5
--- /dev/null
+++ b/Python/draw_hilbertgenerator
@@ -0,0 +1,38 @@
+#!/usr/bin/python3
+import curses
+import time
+
+from hilbertgenerator import Vector, hilbertgenerator
+
+win = curses.initscr()
+curses.curs_set(0)
+n = 16
+state = [ [0] * 2*n for x in  range(2*n) ]
+lastpos = None
+#            0123456789abcdef
+linechars = "·─│┌──┐┬│└│├┘┴┤┼"
+for pos in hilbertgenerator(Vector(n, n), Vector(n, 0), Vector(0,n)):
+    if lastpos is not None:
+        dir = pos - lastpos
+        state[int(lastpos.y)][int(lastpos.x)] |= (
+            (dir.x > 0) * 1 |
+            (dir.y > 0) * 2 |
+            (dir.x < 0) * 4 |
+            (dir.y < 0) * 8
+        )
+        state[int(pos.y)][int(pos.x)] |= (
+            (dir.x < 0) * 1 |
+            (dir.y < 0) * 2 |
+            (dir.x > 0) * 4 |
+            (dir.y > 0) * 8
+        )
+        win.addch(int(lastpos.y), int(lastpos.x), linechars[state[int(lastpos.y)][int(lastpos.x)]])
+        win.refresh()
+        time.sleep(0.1)
+        win.addch(int(pos.y), int(pos.x),
+        linechars[state[int(pos.y)][int(pos.x)]])
+        win.refresh()
+        time.sleep(0.1)
+    lastpos = pos
+time.sleep(5)
+curses.endwin()