[WIP] KDTree implementation

Change logging

kdtree/main.pyx

@@ -154,12 +154,11 @@ cdef cypclass Node activable:
 
         self.n_dims = n_dims
 
-        if (depth < 0) or (nn <= 0):
+        if (depth < 0) or (nn <= 1):
             return
 
-        printf("Depth %d\nSplitting dimension "
-        "%d\nSplit indice %d\nSorting in [%d, %d]\n\n\n", depth, dim,
-        split_index, start, end)
+        printf("Depth %d on dim %d: [%d, %d) med: %d\n\n\n", depth,
+        dim, start, end, split_index)
 
         partition_node_indices(points + start,
                 indices + start, dim, nn // 2, n_dims, nn)