Convert glTF to BufferGeomerty for InstancedMesh?

[Philip2809]

Hello!

I am trying to make preformance better by using InstancedMesh, and I am following the example:

mrdoob/three.js/blob/b1ede8160b5aefe18c7ec29f2af80f78b0ffd911/examples/webgl_instancing_performance.html

But my files are glb, glTF files, not buffergeomery JSONs like in the example. My question is how do I “convert” or use the glb files in InstancedMesh?

InstancedMesh only takes buffergeomery:
https://threejs.org/docs/#api/en/objects/InstancedMesh

This does not work anymore:

Create BufferGeometry from GLTF Model

Hello, I am trying to figure out what is the correct approach for importing a GLTF model, and then accessing its information to create a BufferGeometry object for use? For example: Load GLTF Convert GLTF Model to BufferGeometry Do Something with BufferGeometry Thanks in advance! O.

I guess because the Object3D were remade or?

I found child.toJSON:
gltf.scene.traverse( function ( child ) {
stuff = child.toJSON();
} );

but I can’t get a “normal” Three.buffergeomerty like the buffergeomertyloader gives me. I guess I have missed something but what have I missed?

Best Regards
Philip

[donmccurdy]

The instancing / scatter example (source code) might help. GLTFLoader returns a scene graph that might contain multiple meshes. Each of those meshes will already have a BufferGeometry attached to it. If there’s just on mesh then things are pretty simple, if there’s more than one you’ll need multiple InstancedMesh objects with appropriate offsets.