gltfio: add createInstance() to AssetLoader. #3225
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romainguy
approved these changes
Oct 28, 2020
| * gradually add them to the scene as needed. Instances can also be "recycled" by removing and | ||
| * re-adding them to the scene. | ||
| * | ||
| * NOTE: destroyInstance() does not exist because gltfio favors flat arrays for storage of |
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Would it be that slow? Those arrays won't be big.
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Not super slow, but in some cases, the number of entities in an instance can be large. Also the texture dependency graph has to be re-checked in case a large texture are still being loaded during instance creation.
bejado
approved these changes
Oct 28, 2020
android/gltfio-android/src/main/java/com/google/android/filament/gltfio/AssetLoader.java
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Note that this API is on the loader rather than the asset. This is because the loader knows how to create Filament entities by traversing a cgltf node hierarchy. Animation on dynamically added instances is not yet supported. We did not add destroyInstance() because gltfio favors flat arrays for long term storage of entity lists and instance lists, which would be slow to shift. We also wish to discourage create/destroy churn since it is more efficient to pre-allocate instances and selectively add them into the scene. Fixes #3137.
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Note that this API is on the loader rather than the asset. This is
because the loader knows how to create Filament entities by traversing
a cgltf node hierarchy.
We did not add destroyInstance() because gltfio favors flat arrays for
long term storage of entity lists and instance lists, which would be
slow to shift. We also wish to discourage create/destroy churn since it
is more efficient to pre-allocate instances and selectively add them
into the scene.
Fixes #3137.