initial work at reorganizing source tree

contrib/blockcounter.py

@@ -0,0 +1,43 @@
+import world, chunk
+
+import sys
+from numpy import *
+
+def block_breakdown(worlddir):
+    """Analyzes the given world dir and tallys up total block counts for each
+    type. Returns two arrays.
+    The first is a mapping from (blocktype, z-height) to count
+    The second is a mapping from blocktype to total count
+    """
+    # Maps (blocktype, z-height) to count
+    heights = zeros((256,128), dtype=int)
+
+    # Maps (blocktype) to total
+    totals = zeros((256,), dtype=int)
+
+    all_chunks = world.find_chunkfiles(worlddir)
+    for i, (chunkx, chunky, chunkfile) in enumerate(all_chunks):
+        print "{0} / {1}".format(i, len(all_chunks))
+        sys.stdout.flush()
+        blockarr = chunk.get_blockarray_fromfile(chunkfile)
+
+        for coord, blocktype in ndenumerate(blockarr):
+            totals[blocktype] += 1
+            heights[blocktype, coord[2]] += 1
+
+    return heights, totals
+
+# Some data from my world on iron
+iron = array([   0,  329, 1978, 4454, 6068, 7057, 7116, 7070, 7232, 7441, 7198,
+       7206, 7163, 6846, 6965, 7145, 7251, 7136, 6878, 7142, 7421, 7206,
+       7163, 7264, 7311, 7355, 7145, 7117, 7181, 7424, 7304, 7560, 7591,
+       7321, 7528, 7487, 7355, 7198, 7334, 7566, 7518, 7146, 7510, 7577,
+       7532, 7681, 7612, 7376, 7319, 7216, 7195, 6863, 6399, 6198, 5983,
+       5599, 5320, 4861, 4604, 4250, 3531, 3129, 3045, 2782, 2433, 1966,
+        891,  117,    0,    0,    0,    0,    0,    0,    0,    0,    0,
+          0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
+          0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
+          0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
+          0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
+          0,    0,    0,    0,    0,    0,    0])
+totaliron = 416159