Adding an Import from mesh node

This node creates a terrain from an 3D mesh file.

The mesh is transformed into a heightmap by computing a depth projection according to a viewing vector. A simple analogy would be to imagine that we scan the mesh with a moving laser and use the measured distance between the capture plane and the mesh as the value of the heightmap. The laser position and direction can be decided between six fixed projection directions (i.e. ± X, ± Y, ± Z axis). Both the grid size and the cell size are given by the user.

Note that as the width, height and cell size parameters specify what rectangular area we want to capture and since the mesh is defined in world space, only empty space could be captured.

To add a node, right click in the Graph Editor and select Create Node  > Import  > Import from mesh.

Double click on the node to open its parameters:

Importing a terrain from a mesh

To import a terrain from a mesh:

  • File name: Click on the folder button and browse to the file you want to import, or type the directory of the file to import. File names with Unicode characters are supported.

If you have already saved your project, type just a file name or sub-directory and file name to import it from the same directory as your project. There is no need to type the file directory.


File names with Unicode characters are supported.

The following image formats are supported:

Extension Format Comments
.fbx Autodesk FBX Format 2014 and 2016 versions
.obj Wavefront Format  

Note that if the image has an alpha channel, it is discard and transformed to white.

  • Terrain size: Displays the Width, Height, and Quad size of the terrain.
  • Up axis: Sets which axis to use to measure the elevation.
  • Default elevation: Sets a default height of points on the grid that do not project onto the mesh.

Parameters

Parameter Use
File name Name of the mesh file to load
Terrain size Displays the width, height, and quad size of the mask
Up axis Sets which axis to use to measure the elevation
Default elevation Sets a default height to points of the grid that do not project onto the mesh

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