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Программирование на C#
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Creating a Terrain

The functionality described in this article is not available in the Community SDK edition.
You should upgrade to Engineering / Sim SDK edition to use it.

In Sandworm, the terrain is generated on the basis of georeferenced data (both offline and online). If you want to create a terrain using non-georeferenced data, or sculpt it from scratch with brushes you can do that right in UnigineEditor, the Sandworm tool is not required.

1. Specifying Data Source Type#

To generate the terrain surface in its basic form, the following types of source data are required:

  • Elevation / Height — data used to generate terrain geometry
  • Imagery / Color — data used to generate textures for the terrain surface

2. Specifying Data Source Parameters#

When you select a data source, you can see its parameters in the Parameters panel. The contents of this panel differs depending on the layer type:

  • Georeferenced Tiles — for adding offline data stored on the PC.
  • TMS — for using online data by adding the link.
The TMS data source is currently available for Elevation and Imagery layers only.

Offline Data Sources#

To use data stored on the PC, the Georeferenced Tiles layer type should be used.

  1. Select the data source type:
    • Assets — files that are added to the file system and are a part of the project. Depending on the size of assets, they can be stored in the /data directory or added as a mount. This approach especially is recommended for team work.
      It is recommended to import image files as Unchanged, in order to avoid creating the unnecessary runtime files.
    • External Files, which are not a part of the file system. This type of data source may be useful, if the file extension is unknown to the file system. However, keep in mind that if you share this project, the path to the external file has to be updated accordingly.
  2. Click Import. The dialog window will open to set the path to the data source. If the data source consists of several files/assets, select them all, and they will be added as separate layers.
    The preview generation process may take much time for heavy source files, therefore you can cancel it, and generate later, if that is required.

Online Data Sources#

The TMS layer type is designed for using Tile Map Services for the terrain generation. This option is available for the Elevation and Imagery data types.

For online data, the following parameters should be set:

URL A URL of the online data source. The scope of data is defined by the bounds.
A link to a Tile Map Service inserted as the URL should have x, y, and z embraced into curly brackets ({}).
For example:
  • The link to the OpenStreetMap tile map service (http://a.tile.openstreetmap.org/z/x/y.png) should be used as follows:
  • The link to ArcGIS Online data (https://server.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer/tile/z/y/x.png) should be used as follows:

For sources that require tokens, the link should be arranged in the following way:
The sources that require login and password input are currently not supported.
Zoom Zoom level that specifies the scale of the area map to be downloaded. Data providers have their own zoom levels defined, therefore, this value depends on the source. For example, OSM has the following zoom levels.
Take Bounds Encloses the area visible in the Preview window in the bounds (green frame). The data will be uploaded for the area within these bounds. The position of the tags defining the bounds can be modified, as required.

After the data parameters are set, click Import, and the data preview will be displayed. In case of heavy data, display of the preview may take some time.

The preview generation process may take much time for heavy source files, therefore you can cancel it, and generate later, if that is required.

3. Adding vegetation#

At this step you can determine, which natural features of the terrain are to be generated.

  • The Mask data source type allows using Grass and Mesh Clutter to generate and place vegetation or other objects in certain areas of the terrain according to specified landcover tags.

    Workflow: Generating Vegetation.

  • Terrain details — the tags specified for landcover data sources that determine the areas for terrain details to be placed.

    Workflow: Generating Details.

You may skip this step, if you don't need procedural generation of natural features of the terrain for your project.

4. Setting Up Cultural Layer#

The Vector data source type is used to generate cultural features of the terrain: roads, communications, fences, pipes, buildings, landmarks, etc.

Objects of the cultural layer are divided into 3 groups depending on the type of vector data used for their generation:

  • Vector (Roads) — objects of this type are generated and placed along vectors.

    Workflow: Generating Roads.

  • Point (Buildings, Landmarks, etc.) — objects of this type are generated and placed at certain points.

    Workflow: Generating Point Objects.

  • Buildings — objects of this type are generated on the basis of Open Street Maps (OSM).

    Workflow: Generating Buildings.

You may skip this step, if you don't need procedural generation of cultural features of the terrain for your project.

5. Generating a Terrain#

To generate a terrain, you need to define the output settings, such as the type of the object that is going to be used for the terrain and the world which will store this object.

Then you can generate the terrain by clicking the Generate button.

A terrain fragment will be generated on the basis of the input data and specified output settings in the world that we set as the output one.

Last update: 22.04.2021
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