Opened 13 years ago
Closed 13 years ago
#977 closed defect (fixed)
Random map generation on different platforms can cause multiplayer OOS error
| Reported by: | historic_bruno | Owned by: | |
|---|---|---|---|
| Priority: | Must Have | Milestone: | Alpha 8 |
| Component: | Core engine | Keywords: | rms, sync, spidermonkey |
| Cc: | brian | Patch: |
Description
With certain combinations of systems, there are multiplayer out-of-sync errors when playing random maps. It appears to be a difference in floating point precision, some entity positions differ by 0.00001 or 0.00002 units.
One such configuration:
- Host: Ubuntu 11.04 64-bit, Intel Core i7-2600K (SSE2), custom build GCC (Release)
- Client: Windows XP 32-bit, Athlon XP 2000+ (non-SSE2), custom build VC2010 Express (Release)
OOS logs are attached for comparison.
Attachments (1)
Change History (3)
by , 13 years ago
| Attachment: | oos_logs.zip added |
|---|
comment:1 by , 13 years ago
comment:2 by , 13 years ago
| Resolution: | → fixed |
|---|---|
| Status: | new → closed |
Confirmed to work with the above setup :) The lesson is don't use float, even for temporarily storing map data!
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(In [10326]) Attempts to fix random map OOS errors by avoiding parsing data to floats (uses CFixedVector3D instead). See #977. Changes to rmgen API for consistency and support of 3D position/rotation.