Create Vegetation Scene

This command places 3D symbols for vegetation for visualization by commands such as 3D Viewer Window and Surface 3D Flyover. This command is layer based where closed polylines on different layers are used to different types of vegetation. The vegetation layers are defined in the dialog shown here. The list shows the layer name, symbol name and parameters for each vegetation type. Use the Add, Edit and Delete functions to manage the list of vegetation. The SaveAs and Load functions store and recall the vegetation definitions to a .veg file. The Draw function creates symbols in the drawing within closed polylines on the vegetation layers using the vegetation parameters for symbol name, size and density. The Hatch functions hatch the closed vegetation polylines as a way to visualize that the vegetation areas are correctly defined. The Create Areas function creates closed polylines on the vegetation layers using the vegetation parameters for slopes and the specified surface model. The Create Layers function creates the vegetation layers in the drawing if they don't already exist.The Add and Edit functions define the vegetation parameters in the dialog shown here. A preview of the 3D symbol is shown along with the symbol name. To change the symbol, type in a name or pick the Select button to pick from the Symbol Library. There are several 3D symbols for vegetation included in the default install under the 3D Trees category in the symbol library. To add your own symbol to the library, run the Settings->Symbol Library command. The symbols should be created at unit height (height=1) so that the program can scale to the target height. The Layer is used both for the closed polyline for the vegetation area and for the vegetation symbols. Density Per Acre controls how many vegetation symbols to draw with the area. The Min/Max Heights define the range of heights for the vegetation symbols. The program will randomly size the symbols within this range.

The Create By Slope Settings apply to the Create Areas function. The Min/Max Slopes control the range of surface slopes that the vegetation exists. The Start/End Directions control which slope facing directions that the vegetation exists. The directions should be entered in clockwise order. For example, for vegetation that only occurs on south facing slopes, the Start Direction could be set to 90 and the End Direction set to 270.

The Hatch Settings apply to the Hatch functions. These hatch settings include the pattern, layer, color and scale. The Auto Hatch Scale option sets the scale to fit within the area.

When viewing with the 3D Viewer Window or Flyover, use the Apply Surface Smooth, Apply Texture and Display Sky options to improve the image.