Instructions for use

The Preload (Degree) property in the Model group on the Scene Layer Properties panel sets the load range line for the Vector Model cache display.

After the preload range is set, the scene will create a new view frustum with (2 * preload range + scene camera angle of view) as the angle, so as to increase the loading range of the model; the model within the preload range will be more smooth when Panning.

Where Angle a is the angle of view of the scene camera. The angle of view of the scene camera refers to the range of the camera in the scene (as shown in the figure, the visual range of the human eye or the range of the display screen), and the value range is 0-180. The B angle is the preload range set in the scene. The view volume refers to the collection of imaging objects (models) in space. For example, the view volume angle in the schematic diagram is a + 2b. When the scene is displayed, the redundant part outside the view volume is cut off, and only the relevant content inside the view volume is displayed.

Operation steps

1. Click the ribbon > Scene tab > Data group > Cache button or Cache Drop-down Button " Load Cache..; Alternatively, right-click the " Normal Layer" node in Layer Manager and select the " Add Vector Cache.." item in the Context Menu.
2. In the Model group of the Scene Layer Properties panel, click the text edit box after the Preload (Degrees) label to enter the number of degrees to preload the extents, or click the up and down arrows after the text box to increase or decrease the number. The unit of the preload range is degrees, and the value range is 0-90.