Roundabout Tool (Pro)

Note

This is the Roundabout tile in the Create palette of the Meta Road editor mode (see The Meta Road Editor Mode). (Pro feature.)

Roundabout tool active in the Create palette

The Roundabout Tool draws a closed, circular road spline (URoadSplineComponent) for roundabouts and ring roads in a single drag gesture. The result is an ordinary closed road — you can edit it afterwards like any other road (add lanes, attributes, connect approaches).

Drawing a roundabout

  1. Activate the Roundabout tile.

  2. Press and hold LMB at the intended center of the roundabout.

  3. Drag outward to set the radius — the circular preview updates live, and node 0 follows your cursor direction.

  4. Release LMB to place the roundabout. A new AMetaRoad actor with the closed circular spline is created.

Dragging out a roundabout — the circular preview updates live

After placing it you can keep tuning the shape from the Details panel (the values below update the spline live).

Properties

Property

Default

Description

Radius

1000 (min 200)

Circle radius, cm; also set live while dragging

Num Points

4 (2–16)

Number of control points; more points = smoother circle

Rotation

0° (−180…180)

Rotates node 0 around the center — useful to align entry points with approach roads

Clockwise

off

Spline traversal direction — off = counter-clockwise, on = clockwise

Draw Profile

2_Lanes+Borders_Coodirect

Road Profile applied to the spline after each rebuild

Looped Road Zone

—

Surface zone that fills the interior island

Hit World / Hit Ground Plane

on / on

Raycast targets: world geometry and/or the Z=0 plane

Click Offset

20 (0–100)

Offset above the hit surface, cm

Create Blueprint / Blueprint To Create

off

Optionally output a Blueprint instead of a level actor

Note

The control-point tangents are computed automatically so the spline forms a smooth circle for any Num Points value.

Next steps