Usage Instructions

After enabling the Underground display mode, you can use the Polygonal Excavation function to excavate the Earth's surface in the scene and display the excavation area in the output window. When oblique photography 3D models exist in the scene, after checking the oblique photography layer to participate in excavation, you can set up multi-viewport to display the excavation effect.

Function Entry

• Scene tab -> Underground group -> Excavation dropdown menu -> Polygonal Excavation

Operation Steps

1. Before enabling the Polygonal Excavation function, you need to click the dropdown button on the right side of the "Enable/Disable" label in the Scene tab's Underground group and select the Enable option to activate the Polygonal Excavation function.
2. Click the Excavation dropdown button, and select Polygonal Excavation from the pop-up dropdown menu. This will pop up the "Polygonal Excavation" panel on the right side of the software.
3. Excavation Surface Settings: Supports determining the excavation surface through two methods: drawing and importing.
   • Click the Participate in Excavation button in the toolbox at the top of the Polygonal Excavation panel, then move the mouse to the scene window. The mouse cursor will change to a drawing state, and you can specify vertices that constitute the excavation surface by left-clicking in the scene. Right-click to end the drawing.
   • Click the Import Excavation Surface button in the toolbox at the top of the Polygonal Excavation panel, and you can select a 3D surface dataset representing the excavation surface from the popped-up "Import Excavation Plane" dialog box.
   • After the excavation surface is successfully drawn or imported, corresponding surface nodes will be added under the polygonal excavation list in the panel.
   • Additionally, use the Delete button in the toolbox at the top of the Polygonal Excavation panel to delete the selected surface nodes and clear the corresponding excavation effect in the scene. Use the Export button to export the selected excavation surfaces from the surface list to a specified data source.
4. Set Polygonal Excavation Parameters: Select any excavation surface in the surface list, and you can perform excavation settings in the parameter settings section of the panel.
   • Oblique Photography Layer Participates in Excavation: Sets whether the oblique photography 3D model data in the scene participates in polygonal excavation. After checking, combined with the Viewport Management function, you can set the viewports where the excavation effect takes effect.
   • Underground Depth: Sets the visible depth underground after excavation. Underground objects beyond the set value will not be displayed.
   • Bottom Surface Texture Settings: Sets the image source, repetition mode, horizontal/vertical repetition count, or size for the bottom surface texture after excavation.
     • The texture source defaults to [Installation Path]\Bin\Resource\excavationregion_top.jpg.
     • The repetition modes include repetition count and actual size. Select repetition count, and the texture will be arranged according to the horizontal/vertical repetition count. Select actual size, and the texture will be arranged according to the specified horizontal/vertical size (in meters).
   • Side Surface Texture Settings: Sets the image source, repetition mode, horizontal/vertical repetition count, or size for the side surface texture after excavation. By default, [Product Installation Path]\bin\Resource\excavationregion_side.jpg is used for filling.
   • Surface Transparency: Sets whether to display the excavation area transparently. When the "Surface Transparency" checkbox is checked, the fill setting parameters are unavailable, indicating that no fill is used, and the excavation area is displayed transparently. When the "Surface Transparency" checkbox is not selected, the parameters set in the dialog box are used to fill and display the excavation area.
5. If you need to continue with polygonal excavation operations, repeat steps 3 to 4.