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Hide M2 particle emitter volumes rendering as grey boxes

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M2 models like OrgrimmarFloatingEmbers and OrgrimmarSmokeEmitter have a
simple box mesh (24 verts, 36 indices) meant only to define particle
emitter bounds. Their blendMode was 0 (opaque), causing them to render
as large grey boxes. Detect these by checking for box geometry with
particle emitters and large bounds (>5 units), then mark as invisible.
Also add ANTIPORTAL and batch-disable flag checks to WMO group filtering.
This commit is contained in:
Kelsi 2026-02-16 19:50:35 -08:00
parent 1cfe186c62
commit 6dd811a926
3 changed files with 23 additions and 3 deletions
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14
src/rendering/m2_renderer.cpp
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@ -1198,6 +1198,20 @@ bool M2Renderer::loadModel(const pipeline::M2Model& model, uint32_t modelId) {
gpuModel.batches.push_back(bgpu);
}
// Detect particle emitter volume models: box mesh (24 verts, 36 indices)
// with disproportionately large bounds. These are invisible bounding volumes
// that only exist to spawn particles — their mesh should never be rendered.
if (!isInvisibleTrap && gpuModel.vertexCount <= 24 && gpuModel.indexCount <= 36
&& !model.particleEmitters.empty()) {
glm::vec3 size = gpuModel.boundMax - gpuModel.boundMin;
float maxDim = std::max({size.x, size.y, size.z});
if (maxDim > 5.0f) {
gpuModel.isInvisibleTrap = true;
LOG_DEBUG("M2 emitter volume hidden: '", model.name, "' size=(",
size.x, " x ", size.y, " x ", size.z, ")");
}
}
models[modelId] = std::move(gpuModel);
LOG_DEBUG("Loaded M2 model: ", model.name, " (", models[modelId].vertexCount, " vertices, ",