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feat(character): 16.8 - on land a physics walker moves the body (CharacterGround.walk); the package's own gravity, ballistic air and slope-probe refusal are gone

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The package keeps the rules and hands them over each step: speed and heading, whether a jump
leaves, CHAR_STEP and the boots' slope limit. The walker (Jolt CharacterVirtual) does gravity,
landing, steps, slopes and following the ground down. Too steep is ground too steep facing the way
the body wanted to go; stepping off an edge is not. ludic.physics: phys_walker_move (follow the body
if something else moved it, then step), the slope limit, the jump always honoured. The character's
tests run on a real Jolt walker over the same fake world: 15 pass, a knee-high boulder now a step.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-27 00:47:14 +03:00
parent d2cd775309
commit e909ec122c
11 changed files with 169 additions and 89 deletions
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packages/ludic.character/ground.ludic
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@ -7,16 +7,6 @@ export function char_stand_at(x: float, z: float, from_y: float) -> float {
return CharacterGround.top_at(x, z, 0.35, Math.max(from_y, base), CHAR_STEP, base)
}
# A step up and a slope up are different refusals. Within CHAR_STEP of the feet is a step, taken
# whatever the gradient into it (a 45 cm deck arrives in one frame); above that the boots decide,
# measured over CHAR_SLOPE_PROBE, so the frame rate never changes the answer.
export function char_slope_blocks(character_st: CharacterState, nh: float, fx: float, fz: float) -> bool {
if nh - character_st.chr_y > CHAR_STEP { return true }
let sx = character_st.chr_x + fx * CHAR_SLOPE_PROBE
let sz = character_st.chr_z + fz * CHAR_SLOPE_PROBE
return CharacterGround.height(sx, sz) - character_st.chr_y > CHAR_SLOPE_PROBE * CharacterGround.slope_limit()
}
# a body of radius r at (x, z) from y0 to y1, out of every collider: the resolved point is chr_out_*
function chr_push(character_st: mut CharacterState, x: float, z: float, r: float, y0: float, y1: float) -> bool {
character_st.chr_ask_x = x