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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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19
src/rendering/wmo_renderer.cpp
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@ -1871,12 +1871,27 @@ bool WMORenderer::createGroupResources(const pipeline::WMOGroup& group, GroupRes
resources.indexBuffer = idxBuf.buffer;
resources.indexAlloc = idxBuf.allocation;
// Store collision geometry for floor raycasting
// Store collision geometry for floor raycasting.
// Use MOPY per-triangle flags to exclude detail/decorative geometry (flag 0x04)
// from collision — these are things like gears, railings, etc.
resources.collisionVertices.reserve(group.vertices.size());
for (const auto& v : group.vertices) {
resources.collisionVertices.push_back(v.position);
}
resources.collisionIndices = group.indices;
if (!group.triFlags.empty()) {
// Filter out non-collidable triangles
resources.collisionIndices.reserve(group.indices.size());
size_t numTris = group.indices.size() / 3;
for (size_t t = 0; t < numTris; t++) {
uint8_t flags = (t < group.triFlags.size()) ? group.triFlags[t] : 0;
if (flags & 0x04) continue; // detail/decorative — skip collision
resources.collisionIndices.push_back(group.indices[t * 3 + 0]);
resources.collisionIndices.push_back(group.indices[t * 3 + 1]);
resources.collisionIndices.push_back(group.indices[t * 3 + 2]);
}
} else {
resources.collisionIndices = group.indices;
}
// Compute actual bounding box from vertices (WMO header bboxes can be unreliable)
if (!resources.collisionVertices.empty()) {