• ReCap

Select and classify mesh surfaces

Select mesh surfaces using various methods, and then classify them into target layers.


00:03

Once you set up a classification hierarchy in the Model Browser,

00:07

there are several tools to help you manually select and classify the segmented mesh model.

00:13

Use the selection and classification tools to remove unwanted surfaces from a model prior to exporting

00:21

or create layers and groups to make the model easier to use when exported into BIM workflows.

00:28

When selecting mesh surfaces, you can use options in the Viewing panel to change the selection mode.

00:35

For simple, large surface selection, use Window/Click Selection mode.

00:41

Click an unselected mesh surface to select only that surface.

00:45

This replaces all other current selections.

00:50

Press and hold SHIFT as you click to add that surface to the current selection.

00:56

Hold ALT while clicking a selected surface to deselect it.

01:01

You can also click and drag to draw a selection window.

01:05

This selects any mesh surfaces that fall completely within the window, replacing the current selection.

01:13

Once mesh surfaces are selected, the classification tools become available in the Operations panel.

01:20

From the Target Layer list, select the classification layer for the selected mesh surfaces.

01:26

In this case, select the Ceiling.

01:30

You can also set the target layer in the Model Browser by clicking the Target layer symbol.

01:37

Next, click Classify, or use the hotkey SHIFT+C, to move the selected mesh surfaces into the target classification layer.

01:47

This removes the surfaces from the selection, so you are free to select your next mesh surfaces.

01:54

When you click Classify, the surfaces change color to match the selected target layer,

01:59

because the Classification Rendering mode is currently on.

02:04

Notice that the selected layer is unrelated to the Target Layer,

02:09

which allows you to manage layers without changing the layer you want to work with.

02:14

If you switch off the Ceiling layer, the surfaces in that layer disappear.

02:20

Next, select the floor surfaces.

02:23

If there is no existing floor layer, you can create a new layer called Floor and Classify the selected surfaces into this new layer.

02:33

Note that the floor surfaces are split across two mesh tiles.

02:39

In this case, you can use Merge and Classify, or use the hotkey SHIFT+M,

02:46

to combine all currently selected mesh surfaces into a single mesh object and move this object into the target layer.

02:54

This simplifies future selections, as they will be treated as one piece.

02:59

To remove a selection, click Clear Selection or press ESC.

03:06

Selecting objects individually works well for big surfaces,

03:10

but for more complicated selections, such as a piece of furniture and its associated table and chairs,

03:16

you can use the Window/Click Selection mode to click and drag with the mouse.

03:22

If you miss some surfaces, you can hold SHIFT and drag to add to the selection.

03:29

When cleaning up a selection, you can click Hide Unselected, or use the hotkey SHIFT+H, to toggle the visibility of unselected items.

03:40

You can then remove unwanted selections by holding ALT as you click each item.

03:46

Once the cleanup is finished, add a Target Layer, such as Desk, and then click Merge and Classify to group the objects into one.

03:59

Click Explode, or use the hotkey SHIFT+E, to return a previously merged mesh object to its original set of mesh surfaces.

04:09

The mesh surfaces remain in their current layer and will not move to the target layer.

04:15

You can then Unclassify specific pieces by either clicking Unclassify

04:20

or by using the hotkey SHIFT+U, to return them to the unclassified layers.

04:26

Keep in mind that in this mesh environment, there is only one copy of the data, as displayed in the Model Browser.

04:35

Moving something from the Unclassified section physically moves it into the specified Classified layers.

04:42

You can toggle the views to see either classified or unclassified objects, making it easier to manage your work.

04:51

To select more complicated shapes, you can use Fence Selection mode.

04:56

Click once to start drawing a fence.

04:59

Continue clicking to add nodes to the fence, and then double-click to confirm the selection.

05:06

Mesh surfaces that fall completely within the fence will be selected, replacing the current selection.

05:12

This mode requires you to encompass surfaces completely within your boundary.

05:19

Again, you can hold SHIFT to add surfaces to your fence selection and ALT to remove surfaces.

05:26

Once you are satisfied with your selection, classify and merge the selections into target layers.

05:34

Another way of selecting complex shapes is Triangle Selection mode.

05:40

This mode changes the usual selection tools to select on triangles, rather than entire surfaces, so that the mesh can be split for finer control.

05:50

Once it is turned on, Triangle Selection works in the usual way, in combination with Window/Click or Fence selection.

05:59

Click Triangle Selection again to change back to surface selection.

06:04

If surfaces are incorrectly merged, you can use this mode to isolate and classify problematic areas,

06:11

ensuring a clean and accurate classification process.

06:16

To remove surfaces from the view, select them and then click Delete.

06:23

Deleted surfaces are not removed from the project and can be recovered using the Deleted Surfaces layer in the Model Browser.

06:32

You can load, unload, and rescue deleted surfaces, as needed.

06:38

Saving your project ensures that all changes are retained and removes the undo redo stack,

06:45

which allows you to undo or redo actions like moving surfaces into layers.

Video transcript

00:03

Once you set up a classification hierarchy in the Model Browser,

00:07

there are several tools to help you manually select and classify the segmented mesh model.

00:13

Use the selection and classification tools to remove unwanted surfaces from a model prior to exporting

00:21

or create layers and groups to make the model easier to use when exported into BIM workflows.

00:28

When selecting mesh surfaces, you can use options in the Viewing panel to change the selection mode.

00:35

For simple, large surface selection, use Window/Click Selection mode.

00:41

Click an unselected mesh surface to select only that surface.

00:45

This replaces all other current selections.

00:50

Press and hold SHIFT as you click to add that surface to the current selection.

00:56

Hold ALT while clicking a selected surface to deselect it.

01:01

You can also click and drag to draw a selection window.

01:05

This selects any mesh surfaces that fall completely within the window, replacing the current selection.

01:13

Once mesh surfaces are selected, the classification tools become available in the Operations panel.

01:20

From the Target Layer list, select the classification layer for the selected mesh surfaces.

01:26

In this case, select the Ceiling.

01:30

You can also set the target layer in the Model Browser by clicking the Target layer symbol.

01:37

Next, click Classify, or use the hotkey SHIFT+C, to move the selected mesh surfaces into the target classification layer.

01:47

This removes the surfaces from the selection, so you are free to select your next mesh surfaces.

01:54

When you click Classify, the surfaces change color to match the selected target layer,

01:59

because the Classification Rendering mode is currently on.

02:04

Notice that the selected layer is unrelated to the Target Layer,

02:09

which allows you to manage layers without changing the layer you want to work with.

02:14

If you switch off the Ceiling layer, the surfaces in that layer disappear.

02:20

Next, select the floor surfaces.

02:23

If there is no existing floor layer, you can create a new layer called Floor and Classify the selected surfaces into this new layer.

02:33

Note that the floor surfaces are split across two mesh tiles.

02:39

In this case, you can use Merge and Classify, or use the hotkey SHIFT+M,

02:46

to combine all currently selected mesh surfaces into a single mesh object and move this object into the target layer.

02:54

This simplifies future selections, as they will be treated as one piece.

02:59

To remove a selection, click Clear Selection or press ESC.

03:06

Selecting objects individually works well for big surfaces,

03:10

but for more complicated selections, such as a piece of furniture and its associated table and chairs,

03:16

you can use the Window/Click Selection mode to click and drag with the mouse.

03:22

If you miss some surfaces, you can hold SHIFT and drag to add to the selection.

03:29

When cleaning up a selection, you can click Hide Unselected, or use the hotkey SHIFT+H, to toggle the visibility of unselected items.

03:40

You can then remove unwanted selections by holding ALT as you click each item.

03:46

Once the cleanup is finished, add a Target Layer, such as Desk, and then click Merge and Classify to group the objects into one.

03:59

Click Explode, or use the hotkey SHIFT+E, to return a previously merged mesh object to its original set of mesh surfaces.

04:09

The mesh surfaces remain in their current layer and will not move to the target layer.

04:15

You can then Unclassify specific pieces by either clicking Unclassify

04:20

or by using the hotkey SHIFT+U, to return them to the unclassified layers.

04:26

Keep in mind that in this mesh environment, there is only one copy of the data, as displayed in the Model Browser.

04:35

Moving something from the Unclassified section physically moves it into the specified Classified layers.

04:42

You can toggle the views to see either classified or unclassified objects, making it easier to manage your work.

04:51

To select more complicated shapes, you can use Fence Selection mode.

04:56

Click once to start drawing a fence.

04:59

Continue clicking to add nodes to the fence, and then double-click to confirm the selection.

05:06

Mesh surfaces that fall completely within the fence will be selected, replacing the current selection.

05:12

This mode requires you to encompass surfaces completely within your boundary.

05:19

Again, you can hold SHIFT to add surfaces to your fence selection and ALT to remove surfaces.

05:26

Once you are satisfied with your selection, classify and merge the selections into target layers.

05:34

Another way of selecting complex shapes is Triangle Selection mode.

05:40

This mode changes the usual selection tools to select on triangles, rather than entire surfaces, so that the mesh can be split for finer control.

05:50

Once it is turned on, Triangle Selection works in the usual way, in combination with Window/Click or Fence selection.

05:59

Click Triangle Selection again to change back to surface selection.

06:04

If surfaces are incorrectly merged, you can use this mode to isolate and classify problematic areas,

06:11

ensuring a clean and accurate classification process.

06:16

To remove surfaces from the view, select them and then click Delete.

06:23

Deleted surfaces are not removed from the project and can be recovered using the Deleted Surfaces layer in the Model Browser.

06:32

You can load, unload, and rescue deleted surfaces, as needed.

06:38

Saving your project ensures that all changes are retained and removes the undo redo stack,

06:45

which allows you to undo or redo actions like moving surfaces into layers.

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