skate-3-rust-engine/docs/plants.md

No-complys, footplants and handplants

The stock graphs now reach physical states 602 (no-comply/boneless/fastplant), 601 (air footplant) and 600 (handplant). The implementation connects the TU3 contact selectors, authored animation events, VLT curves, board drives, skeleton roots, limb IK, release trajectories and state publication. IsFootPlanting is registered in both graphs so its formerly unsupported leaf no longer pauses the one-foot path.

Controller controls

These are the existing Xbox mappings and stock graph transitions. Stance and contact determine which animation and physical state can enter.

Action	Input
No-comply	Begin a front-foot push (X in regular, A in goofy), then flick the right stick for an ollie during push entry. The graph accepts the Square gesture group.
Boneless / fastplant	Hold one grab trigger fully, then press A or X. The chosen trigger, push foot and stance select the stock variant.
Air footplant	Ollie, hold LT or RT for a grab, then press and hold A or X for a one-foot air while approaching a reachable surface. Contact prediction and the extended foot determine entry.
Handplant	Hold RB while riding up a steep transition toward reachable coping. Move the right stick to tweak; A/X select one-foot variants and B selects the no-foot variant.

No-comply launches come from the clip's FootJump event. Footplants release at the manager's calculated curve duration. Handplant entry requires upward travel, the authored minimum speed/slope, a selected edge and a valid surface investigation. Holding RB on flat ground does not force a handplant.

Local build

Use the standard build and launch scripts with your prepared assets. The test world supports no-complys and reachable footplant surfaces; handplants require transition/coping geometry satisfying the native selector. Select a converted map from the pause menu or supply it through --map.

Every launcher run now saves both console output streams, build identity and the exit code to a separate logs/plants-<timestamp>-<random>.log. Rust panic backtraces are enabled. On failure the launcher displays the saved output and keeps the console open. Earlier launcher runs did not save output, so their simulation error messages cannot be recovered from this directory.

The RMB/RB crash recorded at tick259 was an explicit Ground error on GrabWorld (Processed2476 bit22). That older placeholder misidentified 82D38430 as an unsupported Skitch query. The TU3 function actually submits the handplant candidate via 82D61268, or resets it via 82D62F20 when the input is released. Those paths already run through handplant::ground_query and ground_update. The obsolete error and its unused duplicate manager have been removed; input still reaches the stock graphs and handplant selector.

The subsequent normal-map run failed at tick4225 in KnownAir because enabled foot part15 carried volume group4. This is the existing native DisableCollisionWithWorld classification, not an unsupported shape. Enabled group4 shapes now stay in the assembly collision pass but are excluded from the world query. Re-enabling world collision by restoring group0 takes effect on the next query. This fixes that explicit exit.

Off-board GrabWorld no longer exits when the host has no interactable object instances. The current static-world adapter returns an empty candidate result (82D4D150's zero-count path), cannot manufacture a candidate key, and commits no object action. Authored input, static line/edge queries and skeleton updates continue. Actual interactable-object loading, queries and actions still require an object-scene adapter; this change does not implement those features. The separately logged off-board non-finite follower velocity remains under investigation, with source target values included in diagnostic builds.

The handplant outgoing selector now distinguishes the surface contact used for admission from the trajectory position at contact time used for the landing anchor (82D66B64..98, 82D66BC0..BF8). The host query adapter also rejects lifted landing targets at or above the apex: those cannot produce a descending 82D608A0 arc and previously reached its negative square root. It continues the six authored queries and uses the existing three-second fallback if none is feasible. This feasibility gate is a host query adaptation, not a claim that the additional gate occurs in TU3.

The tick2032 grind crash reached IsDroppingIn in the ActionGraph, which previously registered the condition only in MotionGraph. Both now read the same completed Grinds324 flag. Handplant attempts additionally log admission inputs every half second while GrabWorld is held on ground, every selected candidate and its surface classification, and relevant state transitions. These traces diagnose rejected entries and bails; they do not establish that handplants are gameplay-validated.

The task executable is a separate copy, built with:

$env:CARGO_TARGET_DIR = Join-Path $PWD 'target'
$env:CARGO_TARGET_X86_64_PC_WINDOWS_MSVC_RUSTFLAGS = '-C target-feature=+crt-static'
cargo build --release --locked --target x86_64-pc-windows-msvc -p skate-game --no-default-features

The shared target is retained. Copy its x86_64-pc-windows-msvc/release/skate3rust.exe to bin/plants/skate3rust.exe after rebuilding this branch. No installed or running desktop executable is replaced. The launcher contains a machine-local asset path; other installations must update that path.

If another worktree has populated this shared target with different workspace crates, refresh the modification times of crates/skate-core/src/lib.rs, crates/skate-data/src/lib.rs and crates/skate-game/src/main.rs before building. That forces the local crates to rebuild without deleting the dependency cache.

Native provenance

Evidence is the owned TU3 executable image default_82000000_011B0000.bin, base 82000000, SHA256 f4aa113eb541bfba03dbc108cf5ab43f58c965b20fa3b82f9c40938a0ad841c4, generated PPC instruction listings, stock OnBoard graphs, OnBoard.abin, and skaterschema/VLT. Registration strings and vtables identify the graph leaves. VMX128 instruction operands take precedence over unreliable decompiler output and community names.

Behavior	TU3 evidence
Input	8259A554/8259AF60 emits GrabWorld from packed bit28; 8259BB18 emits five handplant controls, named by constructors 82F84F28..82F84F98. Existing A/X pushes feed the authored no-comply and one-foot paths.
No-comply / boneless	State602 vtable 82327434; entry 82D4C900, update 82D4C9B8, launch 82D4CB18/82D4CC18. Anchors the completed physical toe, uses the stock linear/angular drive modes and four launch curves.
Footplant	State601 vtable 82327400; manager Start 82D704B0, adjustment 82D70CE0, update 82D70E40, publication 82D71040, nearby-edge refinement 82D6FBB0. Foot/toe volume setup 82D91330; postphysics 82D4C6D8.
Handplant contact	Manager 82D61040; ground query 82D38430, admission 82D61D88, position selector 82D63D40, frame/window/edge clipping 82D640F0..82D65D58. Uses actual world grind primitives, capped at 40 broadphase candidates.
Handplant motion	Launch 82D613B0; six outgoing queries 82D66318, selection 82D66948; arc constructors 82D60770/82D608A0; COM 82D625C0, Bezier 82D62408, orientation 82D62C88, time warp 82D631A8/82D63280. Collision position accessor 82D2D988 and landing-normal accessor 82D2D9E8.
Handplant skeleton	State600 vtable 823273CC; entry/update 82D4C350/82D4C3D8; reckoning 82D8E1C0; hand IK 82D633B0, target clamp 82BD9728/82BD97D0, upper-body volume suppression 82D91298.
Shared skeleton	Anchored-foot path 82BDEC48, COM path 82BDF090, root positioning 82BDEEB8/82BE0E80. Uses the existing completed animation, physical skeleton, board and four-limb IK owners.
Graph timing	IsFootPlanting 82BBD888; preparation 82BBD7F0; FootPlantAbsorb Update 82BBE4E0; handplant phase/new-position 82BBDA98/82BBDB98; antic Begin 82BBE5D0; handplant scoring Update 82BBF758.
Lifecycle	Footplant release 82D8B970 reads big-endian byte2480 bit0, hence full-word bit24. Common handplant publication 82DB7130..82DB7190; FootPlant wipeout check 82D8FDC0; HandPlant post 82D4C530 calls Air 82D90358(false). Teleport/reset paths clear active plant state.

Settings are loaded from the installation, using the schema's cached layout:

Collection class	Used data
CCB95A83C78B4FF9/default	Four PointNegGraphData8 launch curves for state602.
physics_footplantmanager/default (172D553937D8E07C)	Radial speed curve; contact/deck dimensions; leg lengths; Bezier handles; minimum/maximum plant duration; release and wipeout limits.
55B5940075F78842/default	Seven PointGraph4 query-window curves; depth and vertical drop.
physics_handplantmanager/default (0F38084037CB9175)	Time warp; orientation/heading curves; hand-radius curve; entry/release/IK timings; admission thresholds; apex and outgoing-velocity parameters.
anim_handplant/default (F190522E738EC5CB)	Out/into/antic thresholds at offsets0/4/8.

The antic blend reads actual clip lengths: INVERT_HANDPLANT_FS_0_ANTIC is 0.2 seconds and INVERT_HANDPLANT_FS_0_ANTIC_LATE is 1/30 second. FootPlantAbsorb publishes absorblength from the physical manager; no host animation timer or extra jump impulse selects these launches.

Validation and boundaries

Release compilation succeeded. Static inspection checked all 32 operation names in the seven plant templates against source registrations, the five stock collection classes and point-graph layouts, both antic clip lengths, and the FootJump attributes in the no-comply/boneless/fastplant clips. This is not a runtime graph-coverage or gameplay-parity result.

The game, launcher, recomp and gameplay harnesses were not executed. In-game entry/release, contacts, stance combinations, wipeouts, visuals and preservation of skating/off-board/grind behavior remain for the user's validation.

Queries use the engine's existing synchronous static-world collision and grind geometry adapters. The outgoing batch is consumed on handplant entry rather than using TU3's asynchronous job-completion gate and redundant ground-probe completion dependency. Moving-object coping is not supplied by this adapter. Scalar vector/trigonometric helpers and quaternion-derived axis-angle rotation reuse existing engine math; bit-exact Xenon/VMX execution is not claimed. Handplant scoring updates the existing internal score packet, whose presentation remains outside this change. Stock assets and private research/build files are excluded from the commit.

Handplant bail and delayed revert crash (8 September)

The supplied run entered HandPlant at tick745 and WipeoutGround at746, then stopped at tick1318 on the missing PhysicsGround -> RevertGround adapter. HandPlant incorrectly used FootPlant collision checks with unconditional trick impact limits (stock XZ0.1/Y0.6). It now dispatches the native Air(false) checks, including their contact, difficulty, cooldown and actual danger-state gates. The original bail reason was not recorded, so the causal gameplay result still requires a user retest. PLANT_BAIL now records reason indices and collision/pose observations when either plant requests a bail.

RevertGround102 now owns Enter82D43488, Update82D43518, empty Exit, Ground Post82D4C070 and Fill82D43B10. It loads the five fields from stock class 018E8A2E5028AB3F, captures approach velocity after the authored delay, applies the directed rotation-speed curve, manual/anti-flip corrections and pumping, and publishes active State66 for the existing selector's normal exit. No gameplay execution was performed during this repair.

Validation for this repair: six core wipeout tests and two revert numerical tests passed. Two pre-existing game test fixtures were updated for their current map-menu and render-material API signatures so these tests could compile.

Folded-pose report and wall-jump exit (8 September, later run)

Log plants-20260908-174254-418-287 entered HandPlant at tick581, returned to PhysicsGround at603 and stopped at605 in Ground's wall-jump callback. That callback was still an explicit error stub. It now converts the complete retained launch packet to the existing trajectory selector and executes Launch/Update, including the wall-jump velocity in both native velocity fields. A focused packet transfer test passes. No gameplay was executed to validate the result.

The user's folded-body report remains unresolved. HANDPLANT_POSE now records COM/orientation, root transform, target versus physical hips/head/hands/toes and external hand targets at entry and every six ticks. This distinguishes pose/IK errors from physical tracking errors on the next user-provided reproduction.

Handplant apex correction (8 September, folded-body trace)

The 17:48 run shows the head/hips tracking their targets while feet fall roughly 0.5m behind at tick486. A later attempt at1353 produces a NaN incoming arc from COM[-6.9291053,3.925457,4.9562364]. These are observations; visual recovery still requires the user's gameplay validation.

TU3 Launch82D61458 calls cosine82473930, then82D61464 calls sine824531C8. Raw byte-permute mask822FBAC0 is00010203000102030001020314151617. Applying it to the sine/cosine registers and shifting eight bytes produces[sin,cos,0,0]. 82D61520..C4 therefore multiplies UP by radiuscos and side by radiussin. The port had these components reversed. With stock radius0.8/angle-0.3 and copingY3.8850045/Z5.5987973, the corrected apex isY4.649274/Z5.362381; the old target wasY3.648588/Z6.363067. This placed the old target below and beyond the lip, consistent with the blocked feet and invalid late-entry arc. The port now uses the native component order and standalone sin/cos helpers. Regression tests cover the observed late-entry COM, apex arrival/zero vertical velocity, and zero-angle symmetry. Pose traces remain enabled for verification.

Arm and variation investigation (8 September, 17:54 run)

User reports the normal body animation improved, with one arm misplaced; A/B variations still bail. In plants-20260908-175441-712-2596.log, HandPlant requests reason1 (pose displacement) at ticks2209 and5093, without board contact or closing velocity. The previous HANDPLANT_POSE samples compare current targets with the previous physical pose and cannot identify the within-tick source of that displacement.

HANDPLANT_SOLVED now captures authored, IK-adjusted and solved arm positions in world coordinates, arm drive strengths, four limb modes/blends, partial ragdoll state and per-part pose errors before the handplant bail check. It samples every six ticks, or every tick when maximum pose error reaches0.15. This is diagnostic only: neither the arm problem nor variation bails are claimed fixed. Native82D633B0,82BE3220,82BD9728 and82BEDC10 were inspected; the selected arm, two0.65m clamps and feet-only external post pass match the existing port. Need another normal/A/B reproduction to locate the divergence. The same run later terminates in unsupported IsGrindBluntingBackslash at8059; that separate grind condition remains unresolved by this diagnostic change.

Handplant collision-mask correction (8 September, 18:06 run)

The requested normal/A/B reproduction is plants-20260908-180656-119-4993.log. Normal plant316..395 returns to Ground; variations767..788 and1139..1166 request pose-displacement bail1. Solved traces show the free hand tracking within0.006m at324, then falling0.57m behind at340. Its IK adjustment is only0.002m at340. Collision weight drops to0 and the arm switches to soft drives with local/root strengths0.5/0.0. Both variation attempts repeat this sequence. No crash was recorded in this run.

Confirmed source error:82D91298's five volume-pointer writes use offsets 3120,3104,3124,3108,3096; matching counter writes are8156,8140,8160,8144,8132. The generic EnableBone82BE7190 independently establishes the volume base as 4773=3092 and counter base as42032=8128. Both address sets therefore resolve to parts7,3,8,4,1 (hands, forearms, head). The port incorrectly disabled 8,4,9,5,2, leaving the hands and head collidable. TU3 dump identity remains SHA256 f4aa113eb541bfba03dbc108cf5ab43f58c965b20fa3b82f9c40938a0ad841c4. Evidence: logs/recomp-82d91298.asm and logs/recomp-82be7190.asm.

Handplant now calls a shared collision-owner method with the corrected five-part mask and native two-frame countdown. A regression test checks refresh during the plant, survival across normal driven-state setup, other bones retaining contact, and automatic re-enabling after exit. Bail thresholds and authored animation/IK targets are unchanged. The native mask error is fixed; visual recovery and successful variations need gameplay confirmation from the user. The game has not been launched by the agent.