Changelog

0.1.2: joints that bend like beams

• The stiffness between a piece's centre and each joint now follows beam theory: it bends, not only shears. Thin pieces such as floors are no longer as stiff as logs, so a floor laid on beams leaves the load to the beams instead of turning yellow, and beams, posts and braces carry what they really carry.
• A joint now sits at the middle of the area where two pieces touch, instead of the point nearest to one piece's centre: a floor resting on a beam is held along its edge, not by one corner, and the result no longer depends on which piece was placed first.
• Numbers change: floors read lower, beams and posts higher. In the building guide, a balcony 12 m out is now just past the limit (101%) and the tied-arch bridge has two posts at each corner.
• New bridges in the building guide: the tied arch with braced ends (no scaffolding), a truss between stone abutments, a wooden arch leaving 40 m of water clear for boats, and a 100 m crossing on stone piers. Temporary props are drawn dashed, and each picture says whether the bridge needs them.

0.1.1: world buildings

• Buildings that come with the world (stone towers, abandoned houses, villages, ruins) no longer crack and fall when you come near: they keep vanilla support, are not simulated and show in neutral grey. Player builds resting on them are held as if on rock, and are recalculated if they are destroyed.
• New server setting Structure.WorldBuildings: Vanilla (default) or Physics, which simulates world buildings like player builds; many of them will then crack and fall.

0.1.0: first release (early access)

Fysik replaces Valheim's structural support with a force calculation. Back up your worlds.

• Each connected structure is solved as a 3D frame, up to Structure.MaxFrameBodies pieces (2000 by default, 500 to 5000); larger ones use a simplified model that does not recognise arches. Arches work in compression, braces and triangles carry load along their length, cantilevers bend.
• Stress is shown on the piece under the hammer (color and value, e.g. Compression 72%), on the placement ghost before you place it, and on every piece nearby with the X-ray (F7; Ctrl+F7 widens the radius from 40 m up to 80 m).
• An overloaded piece cracks (pulses red, shakes, creaks and sheds dust) for Failure.CrackWarningSeconds (5 s) before it falls, leaving time to shore it up. A piece with no path to the ground falls at once. When a piece gives way, everything it held comes down with it, animated like an imploded building, and whatever is left overloaded follows without warning.
• Chests, workbenches, torches and other pieces that hold nothing up add no weight, but need something to rest on and fall without it.
• Rocks, trees and terrain count as ground and are watched: cut the tree or mine the rock a structure rests on, and it is recalculated.
• Pieces below half health are weaker, down to 25% at the brink of breaking (Failure.DamageWeakens); rain wear alone never weakens a structure.
• Server settings: Structure.Mode (Physics, DisplayOnly or Sandbox), Structure.Difficulty (Relaxed, Normal or Strict) and the weight and strength of each material.
• Multiplayer: the player near a structure calculates it, and the server calculates nothing. The server and every client must run exactly the same Fysik version.
• Nothing falls while a structure is still loading, nor (with Voxheim) before its terrain is ready.
• Structures are solved on a worker thread, without taking frame time.
• Console command fysik stats | recalc | dump; Ctrl+F8 writes the structure under the hammer to BepInEx/fysik-dump.txt.