read Vec3Float
Read a vec3 float32 accessor as a flattened count * 3 array, or null when key is absent. Throws when the accessor overruns binary. Shared by the i3dm / pnts loaders.
Read a vec3 float32 accessor as a flattened count * 3 array, or null when key is absent. Throws when the accessor overruns binary. Shared by the i3dm / pnts loaders.