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Filter WMO decorative geometry from collision, fix tram portal trigger IDs

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Parse MOPY per-triangle flags in WMO groups and exclude detail/decorative
triangles (flag 0x04) from collision detection. This prevents invisible
walls from objects like gears and railings in WMO interiors.

Add WotLK area trigger IDs 2173/2175 to extended-range tram triggers.
This commit is contained in:
Kelsi 2026-03-06 10:37:32 -08:00
parent cefb05c027
commit ee4e6a31ce
4 changed files with 30 additions and 3 deletions
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10
src/pipeline/wmo_loader.cpp
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@ -498,6 +498,16 @@ bool WMOLoader::loadGroup(const std::vector<uint8_t>& groupData,
group.indices.push_back(read<uint16_t>(groupData, mogpOffset));
}
}
else if (subChunkId == 0x4D4F5059) { // MOPY - Triangle material info
// 2 bytes per triangle: flags (uint8) + materialId (uint8)
// flag 0x04 = detail/decorative geometry (no collision)
uint32_t triCount = subChunkSize / 2;
group.triFlags.resize(triCount);
for (uint32_t i = 0; i < triCount; i++) {
group.triFlags[i] = read<uint8_t>(groupData, mogpOffset);
read<uint8_t>(groupData, mogpOffset); // materialId (skip)
}
}
else if (subChunkId == 0x4D4F4E52) { // MONR - Normals
uint32_t normalCount = subChunkSize / 12;
core::Logger::getInstance().debug(" MONR: ", normalCount, " normals for ", group.vertices.size(), " vertices");