0010671: [CLUSTER_NUMBER] creatures have erratic laggy movement - Dwarf Fortress Bug Tracker

ID	Project	Category	View Status	Date Submitted	Last Update

0010671	Dwarf Fortress	Pathfinding	public	2018-03-27 08:41	2018-03-28 10:13

Reporter	FantasticDorf	Assigned To
Priority	normal	Severity	minor	Reproducibility	always
Status	new	Resolution	open
Product Version	0.44.07

Summary	0010671: [CLUSTER_NUMBER] creatures have erratic laggy movement
Description	Though it happens in the air as well as the ground (and in water where applicable), creatures with the [CLUSTER_NUMBER:] tag create laggy movement paths moving around the lead animal often pushing them into awkward situations and conditions. These erratic blobs of creatures are very prone to getting stuck, stopping spawns (a anomalous blob of immobile creatures will stop spawns if the caverns or embark wilderness seem bare) and lowering FPS with many attempts to path through terrain like climbing a wall or simply whilst flying, traveling vertically up and down and constantly swapping spaces with other creatures.
Steps To Reproduce	Find creatures that naturally travel in clusters above & belowground, swarms of birds like ravens for instance, or balls of troglodytes and crundles following each other very very closely. Both ravens and troglodytes are relatively ubiquitous early on in a fortress's progress. You may experience telltale signs of decreased offmap spawns & performance slowdowns in intensive forts, though other reports with saves substantiate this in detail. (See additional information)
Additional Information	As a technical observation, DFhack refers back to [CLUSTER_NUMBER] creatures having a separate movement idling type compared to other roaming individual creatures called [OWNER] with a approximate range of 2 at all times from the leading creature. Alterations to the idling type procure different results but also suggest that default [CLUSTER] behavior could require a alteration to make it less intensive if the following behavior is to stay in rather then gets chucked out like rooting around. 0004838 & 0008912 are directly related but this issue addresses both. The effects of [LOOSE_CLUSTERS] suggests a opposite behavior with more distance.
Tags	No tags attached.

Date Modified	Username	Field	Change
2018-03-27 08:41	FantasticDorf	New Issue
2018-03-28 10:13	lethosor	Relationship added	parent of 0004838
2018-03-28 10:13	lethosor	Relationship added	parent of 0008912