Line 2:
Line 2:
== PM1 Quadtree ==
== PM1 Quadtree ==
+
[[Image:Pm1_example.png|PM1 Quadtree example]]
+
A PM1 Quadtree follows the following rules:
A PM1 Quadtree follows the following rules:
# At most, one vertex can lie in a region represented by a quadtree leaf node.
# At most, one vertex can lie in a region represented by a quadtree leaf node.
Line 7:
Line 9:
# If a quadtree leaf node's region contains no vertices, then it can contain, at most, one q-edge.
# If a quadtree leaf node's region contains no vertices, then it can contain, at most, one q-edge.
# Each region's quadtree leaf node is maximal.
# Each region's quadtree leaf node is maximal.
−
−
[http://wam.umd.edu/~bzoller/cmsc420/pm1_example.png Here] is an example.
== PM2 Quadtree ==
== PM2 Quadtree ==