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feat(nav): 17.3 - a map in square tiles (nav_tiled, nav_tile_build; a tile must be a whole number of cells or its seams never join, and the shim refuses one that is not; 64-bit polygon refs for 16384 tiles), ground as a NavGround with boulders as convex footprints, one save format for one tile or many, and nav_random_near - a reachable point from the caller's seed, bit-identical on the Mac and the PC. 10 tests on both

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-09-27 15:42:37 +03:00
parent 9b8606483d
commit e6893f58be
16 changed files with 436 additions and 109 deletions
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19
packages/ludic.nav/native/shim/nav_query.inl
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@ -51,3 +51,22 @@ NAV_SHIM int nav_raycast(void *h, float sx, float sy, float sz, float ex, float
if (dtStatusFailed(n->query->raycast(a, so, e, &n->filter, &t, nrm, n->polys, &np, NAV_MAX_POLYS))) return -1;
return t >= 1.0f ? 1 : 0;
}
// a point about r from (x, y, z) that a walker there can reach, into out; 0 when there is none.
// Detour asks a function for its dice: this one is seeded by the caller, so the same seed from the
// package's Rng gives the same point on every machine
static unsigned int nav_rs = 1;
static float nav_frand() {
nav_rs = nav_rs * 1664525u + 1013904223u;
return (float)(nav_rs >> 8) * (1.0f / 16777216.0f);
}
NAV_SHIM int nav_random_near(void *h, float x, float y, float z, float r, int seed, float *out) {
Nav *n = static_cast<Nav *>(h);
float p[3] = {x, y, z}, on[3];
dtPolyRef start = nav_poly_at(n, p, on);
if (!start) return 0;
nav_rs = (unsigned int)seed * 2654435761u + 1u;
dtPolyRef ref = 0;
if (dtStatusFailed(n->query->findRandomPointAroundCircle(start, on, r, &n->filter, nav_frand, &ref, out))) return 0;
return ref ? 1 : 0;
}