CODEWITHSUNDEEP
autodesk-forgeautodesk-viewer
Toni Maccheroni
Toni Maccheroni

Reputation: 61

Forge viewer: how to isolate custom objects?

We use custom objects to visualize ifc space data (mostly rooms). As a guidance, we used this very helpful blog. After drawing the objects, we would also like to select the custom objects from outside and isolate them in the viewer. As the tutorial suggests, we change the model builder's changeFragmentsDbId function to set DbIds that do not exist yet and therefor do not overlap with already existing DbIds. One approach is to use the negative space [-1, -2, -3...] for our custom objects DbIds like this:

const roomFragId = this.modelBuilder.addFragment(roomGeometryId, materialName, transform);
this.modelBuilder.changeFragmentsDbId(roomFragId, -roomFragId);

Another one is to find the maximum DbId (eg. 4905) and use numbers higher than this maximum DbId for our custom objects DbIds (eg. [4906, 4907, 4908...]):

const roomFragId = this.modelBuilder.addFragment(roomGeometryId, materialName, transform);
this.modelBuilder.changeFragmentsDbId(roomFragId, maxDbId + roomFragId);

However, when we try to isolate a custom drawn object (viewer.isolate(-1) or viewer.isolate(4906)), the viewer kind of refreshs itself, but no object gets isolated... Thus, we would like to know how we can isolate custom objects?

The other way, when we select the object in the viewer works for the negative space approach => we get the DbId (eg. -1) in the aggregate selection event.

Thank you for any kind of help!

Upvotes: 0

Views: 828

Answers (1)

Eason Kang
Eason Kang

Reputation: 7070

To isolate or select custom objects created by the SceneBuilder ext, you need to pass model object to Viewer3D#isolate / Viewer3D#select like the below. Otherwise, viewer will use viewer.model instead.

viewer.isolate( [4906, 4907, 4908...], this.modelBuilder.model )

viewer.select( [4906, 4907, 4908...], this.modelBuilder.model )

Upvotes: 1

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