GLTFExporter: Support EXT_mesh_gpu_instancing to export InstancedMesh.
#26854
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For testing: https://rawcdn.githack.com/PalashBansal96/three.js/gltf-exporter-gpu-instancing/examples/misc_exporter_gltf.html The import can be tested with the respective editor: https://rawcdn.githack.com/PalashBansal96/three.js/gltf-exporter-gpu-instancing/editor/index.html |
| TRANSLATION: writer.processAccessor( new BufferAttribute( translationAttr, 3 ) ), | ||
| ROTATION: writer.processAccessor( new BufferAttribute( rotationAttr, 4 ) ), | ||
| SCALE: writer.processAccessor( new BufferAttribute( scaleAttr, 3 ) ), | ||
| }; |
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A comment for potential future optimization. (So no need to do in this PR.)
As commented at
the attributes are optional and we may be able to think of exporting an attribute only if it has non-default value. For example, it may not be too rare that all scales are default (1, 1, 1) and in such a case the exported file size can be reducted.
Another approach would be the exporter always exports all the attributes as this PR does, and the optimization can be done in external gltf post-processing pipeline.
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Sounds good, I have tried it here: PalashBansal96@85bac3d
If it looks fine I can push it in this PR.
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We can also merge the PR first and then apply the optimization. In this way, the changes presented in this PR are not blocked.
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Sure, I can make another PR later.
Mugen87
changed the title
Description
Adds support to export InstancedMesh in gltf for both the instanceMatrix and instanceColor. Also, change in GLTFLoader to load the exported instanceColor.
Changed the gltf_exporter example to add a test InstancedMesh in scene1.
This contribution is funded by Threepipe