TREESTAT (Command)

Displays information about the drawing's current spatial index.

The program indexes objects in a region by recording their positions in space. The result is called a spatial index. The spatial index is tree structured and has branching nodes to which objects are attached. The index has two major branches. The paper space branch is called a quad-tree and treats objects as 2D. The model space branch is called an oct-tree and treats objects as either 2D or 3D. The model space branch can also be changed to a quad-tree when you are working on 2D drawings.

TREESTAT displays information about each branch. The most important information is in the first two lines of the report—number of nodes, number of objects, maximum depth of the branch, and average number of objects per node.

If REDRAW and object selection are very slow, you can improve their performance. For example, if there are 50 megabytes of memory available and the current drawing has 50,000 objects with only 1,000 nodes in the index tree, increase the TREEDEPTH value to improve performance.

Each node consumes about 80 bytes of memory. The fewer objects per node of the oct-tree, the better the performance.