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add inUse flag to assist with recycling gltf instances

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This commit is contained in:
Nick Fisher
2025-06-23 12:21:52 +08:00
parent e503dd2e8b
commit 668c001b49
2 changed files with 24 additions and 10 deletions
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2
thermion_dart/native/include/scene/GltfSceneAssetInstance.hpp
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@@ -140,6 +140,8 @@ namespace thermion
return _instance->getBoundingBox();
}
bool inUse = true;
private:
filament::Engine *_engine;
utils::NameComponentManager *_ncm;

32
thermion_dart/native/src/scene/GltfSceneAsset.cpp
View File

@@ -53,25 +53,37 @@ namespace thermion
}
void GltfSceneAsset::destroyInstance(SceneAsset *asset) {
auto it = std::remove_if(_instances.begin(), _instances.end(), [=](auto &sceneAsset)
{ return sceneAsset.get() == asset; });
_instances.erase(it, _instances.end());
for(auto& instance : _instances) {
if(instance.get() == asset) {
instance->inUse = false;
return;
}
}
};
SceneAsset *GltfSceneAsset::createInstance(MaterialInstance **materialInstances, size_t materialInstanceCount)
{
auto instanceNumber = _instances.size();
if (instanceNumber >= _asset->getAssetInstanceCount() - 1)
// first, see if we can recycled any "unused" instances.
for(auto &instance : _instances) {
if(!instance->inUse) {
instance->inUse = true;
return instance.get();
}
}
if(_instances.size() == _asset->getAssetInstanceCount())
{
TRACE("Warning: %d/%d pre-allocated instances already consumed. You may wish to pre-allocate a larger number.",
_asset->getAssetInstanceCount(), _instances.size()
TRACE("Warning: %d pre-allocated instances already consumed. A new instance will be allocated internally, but in future you may wish to pre-allocate a larger number.",
_asset->getAssetInstanceCount()
);
_assetLoader->createInstance(_asset);
} else {
TRACE("Returning pre-allocated instance at index %d", _instances.size());
}
TRACE("Creating instance %d", instanceNumber);
auto instance = _asset->getAssetInstances()[instanceNumber];
auto instance = _asset->getAssetInstances()[_instances.size()];
instance->recomputeBoundingBoxes();
auto bb = instance->getBoundingBox();