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feat(physics): a walker (Jolt CharacterVirtual with an inner body) and the verbs a boat and a guest's copy need - force, torque, angular impulse, spin, set_pose

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Five new tests: stand and walk at the asked speed, a low stone is a step and a tall one a wall, a
jump up and back, a crate shoved aside, a hull turned by a torque and carried by a force.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Orkun ÇAKILKAYA 2026-09-27 00:24:47 +03:00
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commit c7a18fd4f0
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packages/ludic.physics/README.md
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@ -42,6 +42,8 @@ import "ludic.physics"
| `phys_resolve(st, x, z, r, y0, y1, mask) -> bool`, `phys_resolved_x` / `_z` | pushed clear in two passes, the place kept (`CharacterGround.push`, `pushed_x` / `_z`); a thing wholly under the feet or over the head is not in the way |
| `phys_step_top(st, x, z, r, feet, reach, mask) -> float` | the highest top a foot could step up to, anything taller than `feet + reach` left out as a wall |
| `phys_overlap(st, x, y, z, r, mask) -> []int` | the bodies a ball touches |
| `phys_walker_add(st, r, h, x, y, z, max_slope, mass)`, `phys_walker_step(st, id, dt, vx, vz, jump) -> ground`, `phys_walker_pose -> PhysWalk`, `phys_walker_place`, `phys_walker_limits(step_up, stick)`, `phys_walker_remove` | a walking body (Jolt's CharacterVirtual): gravity, landing, steps, slopes, following the ground down; it shoves dynamic things and rays find its `body` |
| `phys_force`, `phys_torque`, `phys_angular_impulse`, `phys_spin_y`, `phys_set_pose(st, id, pose)` | an oar's stroke and a turn; a guest's copy put where the host said |
| `phys_float(st, id, buoyancy, linear_drag, angular_drag)`, `phys_sink`, `phys_floating` | a body buoyed each step against `PhysWater` and carried by its current |
| `phys_facts(st)` | `PhysFact`: `PHYS_HIT` (two bodies met at `ph_hard` m/s or more), `PHYS_SPLASH` (a floating body reached water) |
| `phys_tick`, `phys_advance(st, dt) -> steps`, `phys_step`, `phys_system()` | the system, in `PH_SIMULATE` |