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ludic.wildlife (18.2): a walker a crowd moves

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wildlife_set_crowd(a, true) hands a walker to a crowd. Its step no longer moves it, and its want is two fields on it: goal_x / goal_z (the point it heads for or faces) and goal_speed (0 when it stands). A route reads those and hands back where the crowd put it through wildlife_moved(a, x, z, vx, vz). That sets its place, its ground, its heading from its velocity and its prints, and updates its row's columns so the spatial index finds it there. Nothing allocates per animal per frame: the want is the animal's own fields, and moved writes in place. The prints and the turn counters moved to walked.ludic (steer.ludic was at the 100-line limit). crowd_test holds it; with crowd off every old test is unchanged. wildlife 26/26.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-28 00:27:12 +03:00
parent 521efe67db
commit 81b6782c9d
7 changed files with 140 additions and 10 deletions
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14
packages/ludic.wildlife/steer.ludic
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@ -11,14 +11,11 @@ function wl_face(a: WildAnimal, tx: float, tz: float, rate: float, dt: float) ->
let want = Math.atan2(-(tx - a.x), -(tz - a.z))
let r = rate * dt
a.yaw = a.yaw + Math.clamp(wl_wrap(want - a.yaw), -r, r)
a.goal_x = tx
a.goal_z = tz
}
# true when it moved; a walker is slid round a still thing (a trunk, a tent), a bird is not
# how many steps were refused and turned from since the start: how often the way was not enough
export function wildlife_turned(wildlife_st: WildlifeState) -> int { return wildlife_st.wl_turned }
# of those, how many for water ahead and how many for a climb (the rest: pushed back by a still thing)
export function wildlife_turned_wet(wildlife_st: WildlifeState) -> int { return wildlife_st.wl_turned_wet }
export function wildlife_turned_steep(wildlife_st: WildlifeState) -> int { return wildlife_st.wl_turned_steep }
# a climb is judged over half a metre ahead, not one frame's step: a few centimetres of the drawn
# ground rise steeply over a pebble a walker steps across, and a frame's step shrinks with the rate
@ -31,6 +28,7 @@ function wl_climb(a: WildAnimal, nx: float, nz: float) -> float {
}
function wl_step(wildlife_st: mut WildlifeState, a: WildAnimal, dt: float) -> bool {
if a.crowd { return wl_crowd_step(a) }
let d = a.speed * dt
if d < 0.0001 { return false }
var nx = a.x - Math.sin(a.yaw) * d
@ -54,11 +52,7 @@ function wl_step(wildlife_st: mut WildlifeState, a: WildAnimal, dt: float) -> bo
a.x = nx
a.z = nz
a.y = nh
a.track_d = a.track_d + d
if s.tracks and a.track_d > 2.8 {
a.track_d = 0.0
wl_fact(wildlife_st, WILD_PRINT, a)
}
wl_walked(wildlife_st, a, s, d)
return true
}