Changes between Version 2 and Version 3 of libpipi/sandbox Tweet

Timestamp:

10/22/2008 03:57:47 PM (16 years ago)

Author:

Sam Hocevar

Comment:

C code for the Cantor polynomial

libpipi/sandbox

@@ -26 +26 @@
 $x = k - y$
 }}}
+
+The following C code works OK for values up to 10,000 (higher values may cause overflows), which potentially allows for procedural terapixel images.
+
+{{{
+#!c
+for(int y = 0; y < 10000; y++)
+    for(int x = 0; x < 10000; x++)
+    {
+        int n = (x + y) * (x + y + 1) / 2 + y;
+        int k = (sqrt((double)(n * 8 + 1)) - 1) / 2;
+        int y2 = n - k * (k + 1) / 2;
+        int x2 = k - y2;
+        if(x != x2 || y != y2)
+            printf("ERROR! %i %i -> %i -> %i %i\n", x, y, n, x2, y2);
+    }
+}}}