Decode GPS route result records

This commit is contained in:
2026-06-20 13:37:21 -05:00
parent aaf319e1b4
commit 56a451a7cb
2 changed files with 114 additions and 3 deletions
+37 -3
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@@ -168,9 +168,43 @@ Latest GPS-query finding:
not rendered.
- The current installed probe adds a read-only dump of suspected result-object
fields around offsets `0x20` through `0x5f` on successful active-route
fetches, including first/last route point candidates from `outPath + 0x28`.
This is intended to identify whether the returned route is a raw solver path,
a smoothed draw path, or both.
fetches. The field at `outPath + 0x28` is confirmed to be a pointer-sized
route-result member with a count at `outPath + 0x30`, but live data does not
decode as plain `Vector3`/`Vector4` coordinates. The next probe treats it as
an internal route element array and dumps raw bytes instead of assuming a
float-vector layout.
Latest route-result findings:
- User clock `26:38`: Continue on the main menu.
- User clock `27:01`: Space to continue, with the car in a different position
after a previous drive.
- User clock `27:21`: map opened.
- User clock `28:06`: normal route-click routine complete.
- Same three quest destinations from the shifted start produced different
result counts: side job `12`, Sinnerman `23`, Claire's Garage `18`, and the
custom pin `17`.
- Static disassembly of the `0x520783` result-drain caller shows `0x7094b8`
drains one 0x68-byte route result record at a time from an internal vector.
- Inside that 0x68-byte record, `0x41c508` iterates the member at offset
`0x28` as an array of 8-byte pointers, using the dword at `+0x34` as the
live count. The dword at `+0x30` behaves like capacity or retained allocation
size; earlier logs that treated `+0x30` as the point count were reading the
right magnitude only while capacity and count matched.
- The pointed objects appear to be route/lane segment objects rather than
coordinate vectors. The next probe logs the raw pointer array and selected
fields the engine reads from those pointed objects (`+0x68`, `+0x74`,
`+0x90`, and `+0x98`).
Autodrive finding:
- User clock `28:28` and `28:48`: enabling autodrive did not use the full
world-map GPS caller. It submitted repeated `0x70a42c` queries from return
RVA `0x8ed760`, with `query_fcc=4`, near-current vehicle positions, and
result fetches from return RVA `0x8ed7df`.
- These autodrive queries appear to be short local vehicle navigation requests
using the same query service, separate from the full player GPS map route
caller at return RVA `0x8d20d4` with `query_fcc=5`.
Build and install from the Fedora toolbox: