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fix(woc): scrub NaN triangle vertices + skip degenerate triangles on load

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NaN vertices in collision triangles produce NaNs in ray-triangle
intersection (used by movement collision queries), making the player
phase through walls or fall through the floor. Degenerate triangles
(zero-area, collinear) similarly produce NaN normals. Now both are
sanitized/skipped on load and the count is reported in the log.
This commit is contained in:
Kelsi 2026-05-06 05:24:46 -07:00
parent a3fb267e0b
commit 70bbed4222
1 changed files with 21 additions and 3 deletions
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24
src/pipeline/wowee_collision.cpp
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@ -190,16 +190,34 @@ WoweeCollision WoweeCollisionBuilder::load(const std::string& path) {
f.read(reinterpret_cast<char*>(&col.bounds.min), 12);
f.read(reinterpret_cast<char*>(&col.bounds.max), 12);
col.triangles.resize(triCount);
col.triangles.reserve(triCount);
auto fixVec = [](glm::vec3& v) {
if (!std::isfinite(v.x)) v.x = 0.0f;
if (!std::isfinite(v.y)) v.y = 0.0f;
if (!std::isfinite(v.z)) v.z = 0.0f;
};
for (uint32_t i = 0; i < triCount; i++) {
auto& tri = col.triangles[i];
WoweeCollision::Triangle tri;
f.read(reinterpret_cast<char*>(&tri.v0), 12);
f.read(reinterpret_cast<char*>(&tri.v1), 12);
f.read(reinterpret_cast<char*>(&tri.v2), 12);
f.read(reinterpret_cast<char*>(&tri.flags), 1);
// Skip degenerate / non-finite triangles. They'd produce NaNs in
// ray-triangle intersection (used for movement collision), making
// the player phase through walls or fall through the floor.
fixVec(tri.v0); fixVec(tri.v1); fixVec(tri.v2);
glm::vec3 e1 = tri.v1 - tri.v0;
glm::vec3 e2 = tri.v2 - tri.v0;
if (glm::length(glm::cross(e1, e2)) < 1e-8f) continue;
col.triangles.push_back(tri);
}
// Sanitize stored bounds too — they're used as a coarse cull box.
fixVec(col.bounds.min);
fixVec(col.bounds.max);
LOG_INFO("WOC loaded: ", path, " (", triCount, " triangles)");
LOG_INFO("WOC loaded: ", path, " (", col.triangles.size(), "/",
triCount, " triangles, ", triCount - col.triangles.size(),
" degenerate skipped)");
return col;
}