BeaCraft 1.2.1

For Minecraft 1.21.1. Three fixes to walking and gathering. Two of these were long-standing; the third arrived with 1.2.0 and is the reason trees were being abandoned half-cut.

Following a path

• Steps are ticked off with a block of vertical tolerance. A step only counted when all three coordinates matched exactly, so a landing, a jump or a swim that left the feet a block off the planned height pinned the follower on a step it could never complete.
• Being stuck is measured as ground gained, not as standing perfectly still. Pinned on a step, the walk key flickers and the body rocks on the spot — which counted as movement, so nothing ever gave up and the route was never recalculated. This is the walking back and forth that never recovered.
• Overshooting a step recovers instead of turning around, and the heading is held rather than recomputed when standing on top of the target, where the angle to it is meaningless.

When a route really cannot be walked, the log now says which step it gave up on.

Gathering

• A tree is finished before the next one is started. A target block cannot be stood inside, so walking to one always ends short of it. Since 1.2.0 that was read as "unreachable" and the block was struck off, which is why Bea took a couple of logs out of a trunk and wandered to the next tree. Arrival is now decided by distance. While finishing a vein, candidates are also ranked by distance from the rest of the vein rather than from the player — the log above your head is further away than the foot of the tree beside you.

Build

make setup now checks the version of the local JDK rather than only whether one is present.