47 lines
3.5 KiB
Python
47 lines
3.5 KiB
Python
"""#73: the pick-model resolution."""
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import base64
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import json
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import subprocess
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import urllib.request
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REPO = r"C:\git\bt411"
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BASE = "https://gitea.mysticmachines.com/api/v1/repos/VWE/BT411"
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out = subprocess.run(["git", "credential", "fill"],
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input="protocol=https\nhost=gitea.mysticmachines.com\n\n",
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capture_output=True, text=True, cwd=REPO)
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cred = dict(l.split("=", 1) for l in out.stdout.strip().splitlines() if "=" in l)
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AUTH = "Basic " + base64.b64encode(
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(cred["username"] + ":" + cred["password"]).encode()).decode()
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def call(method, path, payload=None):
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data = json.dumps(payload).encode() if payload is not None else None
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r = urllib.request.Request(BASE + path, data=data, method=method)
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r.add_header("Authorization", AUTH)
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r.add_header("Content-Type", "application/json")
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return json.load(urllib.request.urlopen(r))
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BODY = """**RESOLVED at the model level 2026-07-29** (`bcbc7cf` + `e110b10`): the residual question -- what geometry did the pod's pick test -- has a definitive answer, and it is neither the port's box nor a cylinder.
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**There was never a software pick.** The target block at `mech+0x37c/0x388/0x38c` is an embedded engine `Reticle` struct (`mech+0x36c`, RETICLE.h lays the fields out exactly), and nothing in the binary writes its pick fields -- game code constructs it (the Mech ctor `@0x4a1674`, recovered this dig), gates it (the look-state machine `@0x4afd10`: per-view crosshair positions, pickPointing on only where a view allows it), reads it (HUD, fire path, missiles), and ships it to the video board for drawing (`@0x460a7c`). The pick itself was a **DPL SCENE INTERSECTION run by the division card**: the WinTesla renderer still carries the result slots (`dplHitInstance/dplHitDCS/dplHitGeoGroup/dplHitGeometry`), and the 1995-era renderable constructors each configured `dpl_isect_mode_obj` + an intersection mask per scene object. Auric's "the pod's division card cast from the view" was literal. So was VGL Lynx's LOD warning -- the ray tested the DRAWN geometry, on the active LOD.
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**What this means:**
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- **Aimed fire in 1995 had per-part precision.** Scene ray -> struck triangle -> the DCS is the SEGMENT -> the segment's `dzone` is the credited zone. Aim at the arm mesh, hit the arm's zone.
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- The **cylinder lottery** (the earlier finding on this issue) was only ever the **UNAIMED** path -- splash, cook-off, -1 dispatches.
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- The port's whole-mech box pick funnels AIMED fire through the unaimed lottery -- which is exactly what was documented on night 6. Both halves of the report are now explained: the spray is the unaimed model, and aimed fire wrongly using it is the port gap.
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**Fix design** (recorded in `context/combat-damage.md`): a per-SEGMENT ray test on the shooter side -- `inverse(segmentWorld) * ray` against each segment BGF's local extent box, nearest struck segment wins, its `dzone` dispatched as the aimed zone, beam converging to the segment hit point. The renderable tree already keeps a per-segment `dcs_array` with the live transforms, and `Mech__DamageZone::segmentIndex` maps segments to zones. Falls back to the current box+lottery when no segment resolves (tree not yet built, spectators, etc.).
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Implementation is the next work item on this issue."""
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marker = BODY.strip().splitlines()[0][:60]
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for c in call("GET", "/issues/73/comments"):
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if marker in c.get("body", ""):
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print(" #73 already has this comment - skipped")
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raise SystemExit
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call("POST", "/issues/73/comments", {"body": BODY})
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print(" commented on #73")
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