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ludic.nav (23.5b): a baked mesh resident by chunk

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nav_load_index indexes a saved mesh's tiles (cell, offset, size, ref) from their headers and keeps the file open, with no tile in. nav_tiles_keep reads in the tiles within rin of any player and removes those past rout of all; the file is read through Ludic's pack-aware file_open. The file format is unchanged. tiles_test: tiles come and go with the point, a path works across the seams once they are in, and a reset closes all. Measured on the baked maps (the 900 / 1100 m ring round the start): Maroon 617 of 1807 tiles in, 8.9 MB instead of about 27 MB for a person and 5.4 MB of about 14 for a large walker; Lamar 391 of 1147. Both libraries are rebuilt; nav 17/17 on the Mac and the PC, DLL KERNEL32 only.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-28 11:07:27 +03:00
parent 3915af34c2
commit e807fd556c
12 changed files with 229 additions and 6 deletions
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10
packages/ludic.nav/native/shim/nav_shim.cpp
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@ -43,6 +43,14 @@ const int NAV_MAX_POLYS = 512; // polygons a path may cross; a longer one is
const int NAV_MAX_NODES = 4096; // the search's open list
const int NAV_FILTERS = 8; // costs per kind of ground: one set per kind of walker's taste
// one tile of a file-backed mesh (nav_resident.inl): its cell, where its bytes are, whether it is in
struct NavTileRec {
int x = 0, y = 0, size = 0;
long long offset = 0;
unsigned long long ref = 0;
bool in = false;
};
// a navmesh and the one query that walks it, with the scratch a path needs
struct Nav {
dtNavMesh *mesh = nullptr;
@ -52,6 +60,7 @@ struct Nav {
dtPolyRef polys[NAV_MAX_POLYS];
int partial = 0; // the last path stopped short of its end
long long ns = 0; // time spent finding paths, for the measure (17.10)
std::vector<NavTileRec> tiles; // a file-backed mesh's index; empty for a built or loaded one
};
// a navmesh with its query, from params (a set of tiles) or from one tile's data
@ -79,3 +88,4 @@ const dtQueryFilter *nav_filter(Nav *n, int f) { return &n->filters[f >= 0 && f
#include "nav_tiles.inl"
#include "nav_query.inl"
#include "nav_crowd.inl"
#include "nav_resident.inl"