qvm: model child frame samples

docs/ASSET_PIPELINE_TODO.md

@@ -679,3 +679,6 @@ Research progress: RE-666 [report](research/QVM_ENTITY_FREE.md); remaining nativ
 
 
 Research progress: RE-667 [report](research/QVM_QUERIED_GRENADE.md); remaining native/content/runtime/platform scope stays open.
+
+
+Research progress: RE-668 [report](research/QVM_MODEL_CHILD_SAMPLES.md); remaining native/content/runtime/platform scope stays open.

docs/FINDINGS.md

@@ -1025,3 +1025,6 @@ Bounded qagame paths recover bomb-plant/inactivity correction requests, direct f
 
 
 **RE-667 — Grenade constructor with actual entity query and allocation:** Grenade construction now runs actual276433 over an explicit pool and inherits the selected entity velocity only when its ID equals the owner ground ID. [Evidence](research/QVM_QUERIED_GRENADE.md).
+
+
+**RE-668 — Model-child traversal and frame-sample interpolation:** 25341 skips null child entries, selects112-byte frame/child samples and interpolates twelve words as B+(A−B)×fraction before requesting22009. [Evidence](research/QVM_MODEL_CHILD_SAMPLES.md).

docs/PROVISIONAL_TODO.md

@@ -1002,3 +1002,9 @@ Research progress: RE-666 [report](research/QVM_ENTITY_FREE.md); remaining nativ
 
 
 Research progress: RE-667 [report](research/QVM_QUERIED_GRENADE.md); remaining native/content/runtime/platform scope stays open.
+
+
+Research progress: RE-668 [report](research/QVM_MODEL_CHILD_SAMPLES.md); remaining native/content/runtime/platform scope stays open.
+
+
+RE-659–668 batch complete: [complete finite pose and lifecycle composition](research/QVM_POSE_LIFECYCLE_BATCH.md). RE-669 tracks continued model/trace/lifecycle recovery; original/native parity and playable Rust/Bevy/Solari integration remain open.

docs/RESEARCH_LEDGER.md

@@ -997,3 +997,8 @@ Complete32254 now reaches its void output boundary with actual swing, vector-ang
 ## 2026-10-20 — RE-667 Grenade constructor with actual entity query and allocation (separate task commit)
 
 Grenade construction now runs actual276433 over an explicit pool and inherits the selected entity velocity only when its ID equals the owner ground ID. 28 complete constructor fixtures check actual first-eligible query, skipped used/name/tag records, allocation reuse/extension and all220 final record words. Full suite: 1133 tests pass. Report regenerates byte-identically (1340521 bytes). Storage/filter, links and whitespace checks pass. No assets/Rust runtime/shared VM evaluator changed; native/reference/legal/full platform scope remains open.
+
+
+## 2026-10-20 — RE-668 Model-child traversal and frame-sample interpolation (separate task commit)
+
+25341 skips null child entries, selects112-byte frame/child samples and interpolates twelve words as B+(A−B)×fraction before requesting22009. 47 fixtures independently check traversal/empty boundaries, frame addressing, all twelve interpolated words, extrapolation and exact pending transform arguments. Full suite: 1137 tests pass. Report regenerates byte-identically (68686 bytes). Storage/filter, links and whitespace checks pass. No assets/Rust runtime/shared VM evaluator changed; native/reference/legal/full platform scope remains open.

docs/REVERSE_ENGINEERING_TODO.md

@@ -1017,7 +1017,7 @@ Purpose: turn the supplied installation into an evidence-backed specification of
 - [x] RE-657 Complete entity tag query and continuation ([report](research/QVM_ENTITY_QUERY.md)).
 
 
-- [ ] RE-658 Recover live history scheduling, complete pose/intersection/contact/damage and lifecycle composition; validate original/native reference behavior and connect a Rust gameplay slice. See the [next ten tasks](research/QVM_HISTORY_HIT_BATCH.md#next-ten-concrete-tasks).
+- [ ] RE-658 Partially advanced by RE-659–668: producer caller inventory, complete finite pose, entity-free control flow, actual queried grenade construction and first model-child samples are recovered. Live scheduling, full hierarchy/intersection/contact/damage, external resource effects, original/native parity and a Rust gameplay slice remain open. See the [batch and next ten tasks](research/QVM_POSE_LIFECYCLE_BATCH.md).
 
 
 - [x] RE-659 History producer caller and literal-reference inventory ([report](research/QVM_HISTORY_CALLERS.md)).
@@ -1045,3 +1045,9 @@ Purpose: turn the supplied installation into an evidence-backed specification of
 
 
 - [x] RE-667 Grenade constructor with actual entity query and allocation ([report](research/QVM_QUERIED_GRENADE.md)).
+
+
+- [x] RE-668 Model-child traversal and frame-sample interpolation ([report](research/QVM_MODEL_CHILD_SAMPLES.md)).
+
+
+- [ ] RE-669 Compose complete pose into model-hit processing, recover transform/hierarchy/leaf geometry and actual hit records, then continue trace/contact/damage, scheduling and lifecycle parity toward a verified Rust gameplay slice. See the [next ten tasks](research/QVM_POSE_LIFECYCLE_BATCH.md#next-ten-concrete-tasks).

docs/research/QVM_MODEL_CHILD_SAMPLES.md

@@ -0,0 +1,7 @@
+# Model-child traversal and frame-sample interpolation
+
+RE-668. Reproduce with `python3 scripts/analyze_qvm_model_child_samples.py`; check with `python3 scripts/test_qvm_model_child_samples.py`. The [machine report](qvm-model-child-samples.json) retains source identity and bounded fixtures.
+
+Actual25342 traversal reaches the first nonnull child or stops at25818 before the parent23092 call. Child frames address model+model96+(frame×model80+childIndex)×112 using parent words0/4 and fraction8. Source25454–25717 blends twelve floats at sample64..108 into local96..140 as B+(A−B)×fraction, including negative/above-one weights without clamping. It next requests22009(child,local32); the child is not executed. Direct source calls partition the remainder into22009 transformation, recursive25341 or23092 leaf, and a final23092 parent leaf. Null tables, zero count, all-null and late children are tested without inventing a hit. Model tables are supplied fixtures;22009,23092,asset ownership/identity and complete intersection remain open.
+
+No original executable/full QVM/native collision/physics/rendering executes. Native responses and legal input domains are supplied or unverified where stated; full runtime/macOS/Linux Rust/Bevy/Solari gameplay remains open.

docs/research/QVM_POSE_LIFECYCLE_BATCH.md

@@ -0,0 +1,49 @@
+# Complete finite pose and lifecycle composition: RE-659–668
+
+Ten separately checked tasks extend the [history and model-hit preparation batch](QVM_HISTORY_HIT_BATCH.md). The complete finite pose routine now executes with its recovered source children. Grenade construction uses actual allocation and entity query. Entity-free control flow and the first model-child sample stage are also recovered, with unresolved external effects retained explicitly.
+
+| Task | Recovered scope | Evidence |
+| --- | --- | --- |
+| RE-659 | Exhaustive producer literal references and direct caller owners | [History callers](QVM_HISTORY_CALLERS.md) |
+| RE-660 | Both actual swing controllers and caller pointer reloads | [Controller composition](QVM_POSE_CONTROLLERS.md) |
+| RE-661 | Complete vector-to-angle helper with exact alias fixtures | [Vector angles](QVM_VECTOR_ANGLES.md) |
+| RE-662 | Animation dispatch, horizontal speed and movement-yaw interpolation | [Movement yaw](QVM_POSE_MOTION_YAW.md) |
+| RE-663 | Pitch publication, full velocity normalization and lateral scratch | [Pitch/lean arithmetic](QVM_POSE_LEAN.md) |
+| RE-664 | Relative angle wrapping, numeric flag sum and output layout | [Pose publication](QVM_POSE_PUBLICATION.md) |
+| RE-665 | Complete32254 through actual recovered source children | [Complete pose](QVM_COMPLETE_POSE.md) |
+| RE-666 | Complete277400 control flow with captured resource-release effects | [Entity free](QVM_ENTITY_FREE.md) |
+| RE-667 | Actual276433 query and allocation inside grenade construction | [Queried grenade](QVM_QUERIED_GRENADE.md) |
+| RE-668 | First eligible child traversal, frame sample addressing and interpolation | [Model samples](QVM_MODEL_CHILD_SAMPLES.md) |
+
+## Findings for the rewrite
+
+The history append producer has one direct literal caller in156173; reset has three in174399/203011/219630. All decoded literal references and aligned initialized-data matches are inventoried, with instruction contexts preserved. Dynamic scheduling, source guard interpretation and indirect dispatch still require recovery. No live frame ordering is inferred from these references.
+
+Complete pose32254 now runs two33391 swing controllers through caller-owned pointers, then reloads their mutations. Actual62944 vector-to-angle conversion retains its vertical/zero fallback: zero input produces pitch−270, yaw0. Movement branches select forward/reverse/default paths by the recovered animation jump table, cap integer horizontal speed at200 and clamp yaw delta to±60 before actual63746 interpolation. An integer reciprocal in this scratch path zeros horizontal components above speed1. Later velocity normalization separately uses a floating reciprocal and full3D length; the two calculations must remain distinct.
+
+Pitch is gated by the active flag, biased by15 for IDs20/21 or5 otherwise, and stored through an external pointer. A lateral scalar is calculated but never read by the remaining function; no visible lean effect is claimed from it. The output stage repeatedly wraps head-minus-body and body-minus-legs with inclusive±180 endpoints, publishes absolute legs unchanged and writes a shifted numeric flag sum through an optional pointer. Independent composition checks all nine output angles and external state mutations across110 complete finite fixtures. Original native math bit parity, asset skeleton semantics and legal live inputs remain open.
+
+Entity-free277400 requests unlink and optional nested-object releases, clears nine resource fields in order, then checks548 before whole-record reset. A protected record can retain its object pointer and in-use flag after release requests; this source distinction is preserved without assuming ownership semantics. Unprotected reset writes the free marker, integer tag and current free time into an otherwise zero880-byte record. Resource helper effects and engine unlink remain captured, while bounded zero fill is modeled.
+
+Grenade285971 now composes actual lookup, allocation/initialization and276433 query over supplied entity pools. The report captures the selected entity's actual velocity. That velocity contributes only when selected ID equals the owner's ground ID. Both reused/extended allocation and skipped unused/null-name/wrong-tag records are checked. Native registration remains captured and grenade callback223156 remains unexecuted.
+
+Model traversal25341 skips null children and selects112-byte records by frame and child index. It interpolates twelve words from offsets64..108 using B+(A−B)×fraction, including extrapolation. The next22009 transform request remains pending. The recursive25341 and23092 leaf stages are identified from source but do not execute in these probes. This is sample preparation, not a successful intersection.
+
+## Validation and limits
+
+The1097-test baseline gains40 checks, ending at1137 passing tests. Every new report regenerates byte-identically and remains below2MiB. Independent float32, full-record, pointer mutation, call-order, aliasing, dispatch and whole-pose oracles check bounded source behavior. Existing supplied-query grenade reports also regenerate byte-identically after the optional resolver extension. Storage/filter, documentation-link and whitespace checks pass. No assets, Rust runtime or shared evaluator changes occur in this batch.
+
+All entity pools, model tables and finite input domains are explicit fixtures. Native finite math and bounded zero fill are models; registration, unlink and resource releases are requests without external effects. No original executable/full VM, native heap/collision, complete model intersection/contact/damage, live server tick, networking/rendering or macOS/Linux Rust/Bevy/Solari gameplay runs here. The overarching RE-658 scope remains partially complete; the next work is tracked under RE-669.
+
+## Next ten concrete tasks
+
+1. Compose complete32254 into144766, preserving the actual shooter timing, target pointers and generated pose outputs through transform construction.
+2. Recover22009's child transform composition and matrix layout with independent full-record and alias checks.
+3. Continue25341 through actual22009 and repeated child traversal, recursive/leaf dispatch, parent processing and bounded hierarchy termination.
+4. Recover23092 leaf geometry/primitive contracts and source model buffer ownership, frame bounds and asset identities.
+5. Recover actual hit-context vector/record production, type/key/count meanings and no-hit boundaries; compose actual output with25835 sorting/publication.
+6. Resume the full rewound trace through recovered model returns and all cleanup; retain exact caller mutations and link/unlink requests.
+7. Recover contact292545, reached damage211239, penetration/retry, aggregation and event64 encoding with source-based hit inputs and original reference checks.
+8. Recover conditions and sequencing inside history caller owners156173/174399/203011/219630; validate scheduling and shooter target times.
+9. Recover resource helpers16934/249639 and actual expiry/free/reallocation composition, including protected records and resource aliases.
+10. Continue grenade223156 trajectory/contact/bounce/explosion and original/native trace capture. Implement a verified Rust gameplay slice and continue all macOS/Linux Bevy/Solari asset/rendering/runtime goals.

docs/research/README.md

@@ -603,3 +603,9 @@ The extension collector adds five focused tests for native tail calls, command-r
 
 
 [RE-667: Grenade constructor with actual entity query and allocation](QVM_QUERIED_GRENADE.md). Reproduce with `python3 scripts/analyze_qvm_queried_grenade.py`; check with `python3 scripts/test_qvm_queried_grenade.py`.
+
+
+[RE-668: Model-child traversal and frame-sample interpolation](QVM_MODEL_CHILD_SAMPLES.md). Reproduce with `python3 scripts/analyze_qvm_model_child_samples.py`; check with `python3 scripts/test_qvm_model_child_samples.py`.
+
+
+[RE-659–668: Complete finite pose and lifecycle composition](QVM_POSE_LIFECYCLE_BATCH.md), with validation limits and the next ten concrete tasks.

docs/research/qvm-model-child-samples.json

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+        "trace_sha256": "87b0cfa4263d9f93ecb5b1f8d74cddd2cabd66291e32aaa7ce037069d2d82375"
+      },
+      "fraction": 1069547520,
+      "frame_a": 1,
+      "frame_b": 1,
+      "interpolated_block": [
+        1124614144,
+        3272163328,
+        1124745216,
+        3272294400,
+        1124876288,
+        3272425472,
+        1125007360,
+        3272556544,
+        1125138432,
+        3272687616,
+        1125269504,
+        3272818688
+      ],
+      "model": 2014519296,
+      "pending_call": {
+        "args": {
+          "8": 2014519808,
+          "12": 2014511136
+        },
+        "instruction": 25733,
+        "target": 22009
+      },
+      "request_execution": {
+        "trace": null,
+        "trace_length": 16,
+        "trace_sha256": "59d8c4d8b88ad36649ab5beddabadf3724ef0fc672f5d84b0f3ecf88d9bbbed7"
+      },
+      "sample_offset": 256,
+      "sample_pointers_a_b": [
+        2014520224,
+        2014520224
+      ],
+      "samples_a_b": [
+        [
+          1124614144,
+          3272163328,
+          1124745216,
+          3272294400,
+          1124876288,
+          3272425472,
+          1125007360,
+          3272556544,
+          1125138432,
+          3272687616,
+          1125269504,
+          3272818688
+        ],
+        [
+          1124614144,
+          3272163328,
+          1124745216,
+          3272294400,
+          1124876288,
+          3272425472,
+          1125007360,
+          3272556544,
+          1125138432,
+          3272687616,
+          1125269504,
+          3272818688
+        ]
+      ],
+      "selected_index": 2
+    },
+    {
+      "child_table": 0,
+      "children": [],
+      "count": 4,
+      "execution": {
+        "byte_writes": [],
+        "calls": [],
+        "children": [],
+        "return": null,
+        "stop": 25818,
+        "trace": null,
+        "trace_length": 7,
+        "trace_sha256": "8067d8227d77fb37ba182a71e6ce27b4e17ec03e24bb946252d379595362e6ca"
+      },
+      "fraction": 1056964608,
+      "frame_a": 0,
+      "frame_b": 1,
+      "model": 2014519296,
+      "sample_offset": 256,
+      "selected_index": null
+    },
+    {
+      "child_table": 2014523392,
+      "children": [],
+      "count": 0,
+      "execution": {
+        "byte_writes": [],
+        "calls": [],
+        "children": [],
+        "return": null,
+        "stop": 25818,
+        "trace": null,
+        "trace_length": 23,
+        "trace_sha256": "1aeb7f18a7f7c69eb11386cf2b3e5c17db2e57231c091bf19453d0d3abfed12d"
+      },
+      "fraction": 1056964608,
+      "frame_a": 0,
+      "frame_b": 1,
+      "model": 2014519296,
+      "sample_offset": 256,
+      "selected_index": null
+    }
+  ],
+  "sha256": "a589351dfe517470a1b121dd2164714987d9e4577bf00c6486e1540035d7a79d",
+  "source": {
+    "archive": "zUrT43_qvm.pk3",
+    "archive_sha256": "b59bf0c5bedf11d50e0edd220da7eade96de40601e98ae14c54c819047df0796",
+    "member": {
+      "bytes": 983300,
+      "comment_hex": "",
+      "compressed_bytes": 246560,
+      "compression": 8,
+      "crc32": "98ea1768",
+      "create_system": 0,
+      "create_version": 63,
+      "date_time": [
+        2018,
+        6,
+        18,
+        22,
+        11,
+        50
+      ],
+      "directory": false,
+      "entry_index": 2,
+      "external_attr": 32,
+      "extra_hex": "0a0020000000000001001800d1e24e974007d40116dcbf962f1fd20116dcbf962f1fd201",
+      "extract_version": 20,
+      "flags": 0,
+      "header_offset": 221309,
+      "internal_attr": 0,
+      "occurrence": 0,
+      "output": "assets/extracted/zUrT43_qvm.pk3/members/000002/vm/qagame.qvm",
+      "path": "vm/qagame.qvm",
+      "sha256": "a589351dfe517470a1b121dd2164714987d9e4577bf00c6486e1540035d7a79d",
+      "type": "member",
+      "volume": 0
+    }
+  }
+}

scripts/analyze_qvm_model_child_samples.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+"""25341 child traversal and112-byte animation sample interpolation before22009."""
+import itertools
+from pathlib import Path
+from qvm_research_support import source
+from qvm_trace_support import resume
+from analyze_deferred_auth import trace_slice
+from analyze_bsp_references import trace_fields
+from analyze_qvm_acceleration import word
+from analyze_qvm import write_json
+LOCAL=0x78130000
+ROOT=0x78131000
+MODEL=0x78132000
+TABLE=0x78133000
+OFFSET=256
+
+def sample(ins,m):
+    m=dict(m);root=m[LOCAL+216];model=m[root+88];count=m[model+80];table=m[root+92];children=[m[table+4*j] for j in range(count)] if table else [];frame_a=m[root];frame_b=m[root+4];fraction=m[root+8]&0xffffffff
+    m,e=resume(ins,25342,25833,m,LOCAL,boundaries=[25718,25818]);selected=m.get(LOCAL+144) if e['stop']==25718 else None
+    p={'frame_a':frame_a,'frame_b':frame_b,'fraction':fraction,'count':count,'child_table':table,'children':children,'model':model,'sample_offset':m[model+96],'selected_index':selected,'execution':e}
+    if selected is not None:
+        a=m[LOCAL+28];b=m[LOCAL+24];request=trace_slice(ins,25718,25734,m,{},local_base=LOCAL,capture_stack=True);p.update({'sample_pointers_a_b':[a,b],'samples_a_b':[[m[base+o]&0xffffffff for o in range(64,112,4)] for base in [a,b]],'interpolated_block':[m[LOCAL+o]&0xffffffff for o in range(96,144,4)],'pending_call':request['calls'][0],'request_execution':trace_fields(request,False)})
+    return p
+
+def fixture(frame_a,frame_b,fraction,kind,count=4):
+    m={LOCAL+216:ROOT,LOCAL+220:0x10000,LOCAL+224:0x20000,LOCAL+228:0x30000,ROOT:frame_a,ROOT+4:frame_b,ROOT+8:word(fraction),ROOT+88:MODEL,ROOT+92:0 if kind=='no-table' else TABLE,MODEL+80:count,MODEL+96:OFFSET}
+    for j in range(count):
+        m[TABLE+4*j]=0 if kind in ['none','no-table'] or (kind=='late' and j<2) else ROOT+4096+256*j
+        for frame in [0,1]:
+            p=MODEL+OFFSET+(frame*count+j)*112
+            for o in range(64,112,4):m[p+o]=word((frame*100+j*10+o/4+.25)*(-1 if o%8 else 1))
+    return m
+
+def main():
+    q,raw,h,ins=source();rows=[]
+    for (a,b),fraction,kind in itertools.product([(0,1),(1,0),(1,1)],[-.5,0,.5,1,1.5],['none','first','late']):rows.append(sample(ins,fixture(a,b,fraction,kind)))
+    rows.append(sample(ins,fixture(0,1,.5,'no-table')));rows.append(sample(ins,fixture(0,1,.5,'none',0)))
+    calls=[{'instruction':i['index']+1,'target':i['operand']} for i in ins[25342:25832] if i['opcode']=='CONST' and ins[i['index']+1]['opcode']=='CALL']
+    write_json(Path('docs/research/qvm-model-child-samples.json'),{'source':q['source'],'sha256':q['sha256'],'direct_child_calls':calls,'probes':rows,'limits':'Actual25342 traversal through first eligible child sample preparation, stopping before22009, or25818 parent leaf call. Supplied model/frame tables; no transform child,recursive intersection,asset identity or successful hit is fabricated.'})
+if __name__=='__main__':main()

scripts/test_qvm_model_child_samples.py

@@ -0,0 +1,21 @@
+import json,unittest
+from pathlib import Path
+from test_qvm_ground import word,n,f
+class ModelChildSamplesTests(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls):cls.r=json.loads(Path('docs/research/qvm-model-child-samples.json').read_text())
+    def test_first_nonnull_child_or_parent_boundary(self):
+        self.assertEqual(len(self.r['probes']),47)
+        for p in self.r['probes']:
+            index=next((j for j,v in enumerate(p['children']) if v),None);self.assertEqual(p['selected_index'],index);self.assertEqual(p['execution']['stop'],25718 if index is not None else 25818)
+    def test_independent_frame_stride_and_all_twelve_interpolated_words(self):
+        for p in self.r['probes']:
+            if p['selected_index'] is None:continue
+            expected=[p['model']+p['sample_offset']+(frame*p['count']+p['selected_index'])*112 for frame in [p['frame_a'],p['frame_b']]];self.assertEqual(p['sample_pointers_a_b'],expected);a,b=p['samples_a_b'];t=n(p['fraction']);self.assertEqual(p['interpolated_block'],[word(f(n(y)+f(f(n(x)-n(y))*t))) for x,y in zip(a,b)])
+    def test_pending_transform_abi_and_no_executed_children(self):
+        for p in self.r['probes']:
+            self.assertEqual(p['execution']['calls'],[])
+            if p['selected_index'] is not None:self.assertEqual(p['pending_call']['target'],22009);self.assertEqual(p['pending_call']['args'],{'8':p['children'][p['selected_index']],'12':0x78130000+32})
+    def test_source_partition_and_unclamped_weights(self):
+        self.assertEqual([c['target'] for c in self.r['direct_child_calls']],[22009,25341,23092,23092]);self.assertEqual({n(p['fraction']) for p in self.r['probes']},{-.5,0,.5,1,1.5})
+if __name__=='__main__':unittest.main()