Updating volume representation parameters

Greetings,

I am able to generate a volume from a cube file like this:

      const parsed = await molstar.dataFormats
         .get("cube")
         ?.parse(molstar, _data);

      const repr = molstar.build();

      repr.to(parsed.volume.ref).apply(
        StateTransforms.Representation.VolumeRepresentation3D,
        createVolumeRepresentationParams(molstar, firstVolume.data, {
          type: "isosurface",
          typeParams: {
            visuals: [defaultVolumeParams.visuals],
            alpha: defaultVolumeParams.alpha,
            isoValue: Volume.adjustedIsoValue(
              volumeData,
              defaultVolumeParams.isoValue,
              "relative"
            ),
          },
          color: "uniform",
          colorParams: { value: defaultVolumeParams.color as Color },
        })
      );

      await repr.commit();

I keep parsed.volume.ref in a separate list so that I can access the state object later. How can I update the representation shown above?

Thanks.

[dsehnal]

• selector is a pointer to the current cell when building the state tree
• parsed.volume.ref is reference to the volume data, not the representation, these are different things.

[dsehnal]

const representation = repr.to(parsed.volume.ref).apply(
        StateTransforms.Representation.VolumeRepresentation3D,
       ... 
).selector;

await plugin.build().to(representation).update(createVolumeRepresentationParams(...)).commit();