new test cases

worked on all walkers
new helper methods
new distributions
some bugfixes

grid/Grid.h

@@ -235,6 +235,11 @@ public:
 		remove(nodes[idx]);
 	}
 
+
+	/**
+	 * mark the given node for deletion
+	 * see: cleanup()
+	 */
 	void remove(T& node) {
 
 		// disconnect from all neighbors
@@ -250,8 +255,11 @@ public:
 
 	}
 
+	/** remove all nodes marked for deletion */
 	void cleanup() {
 
+		debugMemoryUsage();
+
 		Log::add(name, "running grid cleanup", false);
 		Log::tick();
 
@@ -293,6 +301,8 @@ public:
 
 		rebuildHashes();
 
+		debugMemoryUsage();
+
 	}
 
 	/** rebuild the UID-hash-list */
@@ -310,6 +320,18 @@ public:
 
 	}
 
+	/** debug-print the grid's current memory usage */
+	void debugMemoryUsage() {
+		const uint32_t bytes = nodes.size() * sizeof(T);
+		const uint32_t numNodes = nodes.size();
+		uint32_t numNeighbors = 0;
+		//uint32_t numNeighborsUnused = 0;
+		for (T& n : nodes) {
+			numNeighbors += n._numNeighbors;
+		}
+		Log::add(name, "memory: " + std::to_string(bytes/1024.0f/1024.0f) + " MB in " + std::to_string(numNodes) + " nodes");
+	}
+
 //	/**
 //	 * remove all nodes, marked for deletion.
 //	 * BEWARE: this will invalidate all indices used externally!