WebGLBindingStates setupVertexAttributes BUG

[xjindf]

When I use the scene with both InstancedMesh and normal Mesh, and set the scene.overrideMaterial =Depthmaterial; then object.instanceMatrix Is the undefined value, because normal Mesh does not have this property. In the setupVertexAttributes method of WebGLBindingStates, const attribute= attributes.get(object.instanceMatrix) On line 386, an exception is thrown. It is suggested to modify the get method of WebGLAttributes and add judgment:

function get(attribute) {
     if (attribute === undefined) {
         return undefined;
     }
    if ( attribute.isInterleavedBufferAttribute ) { attribute = attribute.data ;}
    return buffers.get ( attribute );
}

[takahirox]

Hi, thanks for the report!

Would you mind if making an example which can reproduce the error at jsfiddle? It helps us investigate the problem.

(Note to Three.js core devs. If I'm right, it doesn't sound like a VAO related problem. It seems to have existed even since before we introduced VAO)

[xjindf]

https://jsfiddle.net/yzogx8v5/4/

[xjindf]

Before joining the instancematrix, my program is working well, so a judgment should be added here

[Mugen87]

Duplicate of #17701.

[Mugen87]

There is also a PR for fixing this issue: #20135

[Mugen87]

Another user in the forum has run into this bug: https://discourse.threejs.org/t/mixed-use-of-mesh-and-instancedmesh-r120-version-reports-an-error/18281/2