Removing Hidden Elements

To reduce the data size, you can remove hidden elements in a representation with respect to predefined viewpoints using the HSR (Hidden Surface Removal) simplification method either in default or advanced mode. Once the calculation is complete, you can use the HSR removed elements manager to adjust the result.

The bounding box lets you choose among fourteen predefined viewpoints; one at the center of each face (6) and one at each corner (8).

This task shows you how to:

Before you begin: Run the Experience Models Preparation app on a model that contains at least a representation.
See Also
About Simplification

Execute the HSR in Default Mode

You can launch the HSR in default mode using the predefined viewpoints.

  1. Click Information Report in the Data Preparation action bar.
    The Information Report panel appears.
  2. Select the whole product using a selection trap.
    The selected Number of triangles value is similar to the total Number of triangles value.
  3. Click Hidden Surface Removal .
    The Hidden Surface Removal panel appears and is snapped to the Information Report panel.
  4. Click Launch.
    Hidden triangles are removed with respect to the predefined viewpoints selected.

    In the Information Report panel, the total number of triangles is decreased accordingly.

Execute the HSR in Advanced Mode

You can launch the HSR in advanced mode using specific viewpoints.

  1. Click Information Report .
    The Information Report panel appears.
  2. Select the whole product using a selection trap.
    The selected Number of triangles value is similar to the total Number of triangles value.
  3. Click Hidden Surface Removal .
    The Hidden Surface Removal panel appears.
  4. Expand Viewpoints Management and Advance Settings regions in the Hidden Surface Removal panel.

    The default viewpoints are represented by the first item of the thumbnail:

    • To delete the default viewpoints and all newly created viewpoints, click Remove selected viewpoints.
    • To restore default viewpoints, click Apply default viewpoints .

    Important:

    To restore all settings in the Hidden Surface Removal panel, click Default.

  5. Modify the product orientation and click Add current viewpoint .
    A new item is added in the thumbnail.
  6. In the Advanced Settings area, select the available options:
    • Filter transparent faces: Removes transparent faces. This check box is selected by default.
    • Points always visible: Keeps points always visible. This check box is selected by default.
    • Process wires: Includes the wires in the HSR operation. This check box is selected by default.
    • Process edges: Takes into account the edges in the HSR operation. This check box is cleared by default.
    • Keep granularity: Keeps the geometry granularity level. This check box is selected by default.
    • Activate partial selection: Applies the HSR calculation to a partial selection.
  7. Click Launch.
    Hidden triangles are removed with respect to the specified viewpoints.

    In the Information Report panel, the total number of triangles is decreased accordingly.

Manage HSR Removed Elements

You can restore HSR removed elements or delete them permanently.

  1. Click Hidden Surface Removal .
    The Hidden Surface Removal panel appears.
  2. Click Launch.
  3. Click to display the HSR manager window.

    Note: The button becomes available when products are detected by the HSR operation.

    The HSR manager window is displayed. It provides a list of the elements removed during the last run of the HSR execution and scene visualization options.
  4. Do either of the following:
    • To restore an element, select the element check box in the list, and click Restore.
    • To delete an element, select the check box in the list, and click Delete.
    • To restore all elements, select the Check all check box, and click Restore.
    • To delete all selected elements, select the Check all check box, and click Delete.
    • To search for specific elements, enter a search string in the search filter box.
      Note: If you restore or delete elements, only filtered elements are taken into account.
    • To sort the list alphabetically, click the up or down arrows.
  5. To help you determine whether the selected elements should be restored or deleted, in the Scene Visualization Options area, select
    • Highlight Selection check box to highlight the selected elements in the work area.
    • Transparency check box, and adjust the model's transparency using the slider.
    Elements that are not selected become transparent in the work area to let you visualize better the elements involved in the HSR.