Soil Draft Physics V1.0.0.1

Soil Draft Physics V1.0.0.1

Your tractor finally feels the soil. Implements pull harder in heavy wet clay than in dry sand, and tyres grip according to their size, load and pressure.
– Realistic implement draft (ploughs, rippers, cultivators, discs, seeders) based on agricultural standards
– Uses Precision Farming soil types and soil moisture (works without PF too)
– Tyre traction and rolling resistance from real tyre sizes, wheel load and pressure
– Automatic tyre pressure by axle load, with CTIS support in 4×4 Traction System
– Clean, movable HUD (Ctrl+Shift+H show/hide, Ctrl+Shift+M move)

Beta version – feedback and log.txt are welcome!
Implement draft and tyre traction based on real soil, using agricultural engineering standards (ASABE D497 draft and Brixius traction).
Draft force per implement type (plough, ripper, subsoiler, cultivators, disc harrow, seeders…), width, depth, speed
Precision Farming soil types (sand → silty clay); works without PF using a medium soil
Soil moisture per soil type (sand dries fast, clay stays heavy for days)
Tyre/soil traction from real tyre sizes (e.g. 710/60R38), wheel load and pressure; rolling resistance in soft soil
Tyre pressure from real axle load; CTIS support with 4×4 Traction System (VarioGrip style), fixed pressure on tractors without CTIS, tracks supported
Replaces the game’s own draft force (no double counting)
HUD: Ctrl+Shift+H show/hide, Ctrl+Shift+M mouse to drag it anywhere
Settings: modSettings/FS25_SoilDraftPhysics.xml (intensity, traction scale)

BETA: feedback and log.txt welcome. Not recommended with Mud System Physics or Tractor Terrain Dynamics (tyre grip is handed over to them automatically).

V1.0.0.1
Performance
Fixed FPS drops when driving onto a field or ploughing (reported by Patrik Vendelberger). Tyre/soil sampling now runs only for the vehicle driven by a player and is spread over several frames; before, every vehicle on the map was processed in one frame, 4 times per second.
Wheel sinkage, tyre grip and the implement’s physical depth are updated less often and with smoothed values (no more constant wheel rebuilding).
Less work per frame in the HUD (texts and colours are built 4 times per second instead of every frame) – fixes a small camera stutter while working.
Faster game start: the settings menu section is now built only the first time you open Settings (it froze the start by ~4 s).
HUD textures compressed – no more “raw format” warnings in the log (reported by Patrik Vendelberger).
Behaviour
The mod now only works on the vehicle driven by a player. Parked vehicles and AI helpers are 100% base game; when you leave a tractor or hire a helper, everything goes back to the game’s values.
Smoother draft force: uses a smoothed speed, and short losses of ground contact no longer drop the force to zero for one frame.

Thanks to Patrik Vendelberger for the report and logs!