Module island 

Structs

ContactLink

Cached contact data stored in the island for fast contiguous iteration. Avoids touching Contact during union-find in island splitting. (b2ContactLink)

Island

Persistent island for awake bodies, joints, and contacts. Contacts are touching. Contacts and joints may connect to static bodies, but static bodies are not in the island. (b2Island)

IslandSim

Used to move islands across solver sets. (b2IslandSim)

JointLink

Cached joint data stored in the island for fast contiguous iteration. (b2JointLink)

Functions

create_island

Create an empty island in the given set. Returns the island id. (b2CreateIsland — C returns a pointer; Rust returns the id)

destroy_island

(b2DestroyIsland)

link_contact

Link a contact into an island when it starts having contact points. (b2LinkContact)

link_joint

Link a joint into the island graph when it is created. (b2LinkJoint)

split_island

Split an island because some contacts and/or joints have been removed. This uses union-find and touches a lot of memory, so it can be slow. Note: contacts/joints connected to static bodies must belong to an island but don’t affect island connectivity. Note: static bodies are never in an island. (b2SplitIsland / b2SplitIslandTask — the C runs this as a task in parallel with the constraint solve; the serial port calls it inline)

unlink_contact

Unlink a contact from the island graph when it stops having contact points or is destroyed. (b2UnlinkContact)

unlink_joint

Unlink a joint from the island graph when it is destroyed. (b2UnlinkJoint)

validate_island

Validate island connectivity and bookkeeping. (b2ValidateIsland)