Adding an Profile curve node

This node creates a terrain from a curve. You draw the terrain profile by drawing a curve. The terrain height is not affected radially from the outside to the inside as in the Circular symmetry node, but linearly from one side of the terrain to the other.

To add an Profile curve node, right click in the Graph Editor and select Create Node  > Terrain Generation  > Profile curve.

Double click on the node to open its parameters:

Changing the terrain size

  • To change the terrain size, edit the Width and Height fields in number of vertices.
  • To change the quad size, edit the Quad size field in meters.

Setting the minimum and maximum heights

You can set the minimum and maximum height of the vertices to a defined value, represented by a value of 0 and 1, respectively, on the curve.

  • Minimum height: Determines the minimum height of the vertices whose value on the curve is 0.
  • Maximum height: Determines the maximum height of the vertices whose value on the curve is 1.

Editing curve values manually

By default, the Manual curve editing mode is activated.

  • Select your cursor size from small, medium, and large.

Using the smallest cursor makes detailed changes to the values; using a larger cursor makes changes to larger areas in the terrain.

Small, medium, and large cursor to make changes to the terrain values
  • Click and drag the mouse to change the terrain values.
  • Click OK to validate.

Smoothing the curve

Click on the Smooth button to smooth the values of a curve. You can click several times to smooth more.

Smoothed curve

Adding control points

Once you have edited your curve, you can switch from the Manual mode to the Point mode to add control points. The control points are displayed in increasing subdivisions of five, from 5 to 50 points. A higher number of control points gives you more control over the changes you make to the curve.

  • Click on the Point button in the Parameters dialog.
  • Select the maximum number of subdivisions from the drop-down list.
  • Click OK to validate.

Editing a control point

The Automatic point editing option is selected by default. This option does not use anchor points:

  • Edit the control points by clicking on a point and dragging the mouse to a new position.
  • To edit the curve using anchor points, right-click on a point and select either:
    • Smooth point: Drag the anchor points to smooth the point. The anchor points are paired, resulting in a smooth curve.
    • Angle point: Drag the anchor points to smooth the curve. The anchor points are unpaired.
  • Click OK to validate.

If you have not yet edited your curve in the Manual mode, you can click on the curve in the Point mode to add and edit points.

Deleting a control point

To delete a control point, right-click on it and select Delete this control point in the contextual menu.

Resetting the curve

Click on the Reset button to reset the curve to the default values.


Parameters

Parameter Use
Selection of the size of the cursor used to distort the curve.
Smooths the current curve
Resets to the default curve (no modification to the terrain)
Switches to the manual editing mode using brushes
Switches to the control point editing mode

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