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Camera Control

RoadRunner uses a single window with an adjustable camera to view the 3D scene. The camera is based on a polar viewing model centered on a point of interest with an adjustable distance, azimuth angle, and incline angle.

You can adjust the camera at any time and from within any tool by pressing and holding the Alt key (or Windows/Command key) and moving the pointer.


In Ubuntu® 16.04, the Alt key and Windows/Command keys have special purposes. If you use Ubuntu 16.04, see Camera Movement in Linux or Ubuntu.

Rotate the Camera Around the Point of Interest

  1. Press and hold the Alt key.

  2. Click and drag the pointer to rotate the camera.

Zoom In and Out from the Point of Interest

  1. Press and hold the Alt key.

  2. Right-click and drag to zoom in and out.

Move the Point of Interest in the Ground (XY) Plane

  1. Press and hold the Alt key.

  2. Right-click and click and drag to move the point of interest.

Alternatively, you can middle-click and drag to move the point of interest.

Raise or Lower the Point of Interest Vertically

  1. Press and hold the Alt key and the Shift key.

  2. Right-click and click and drag to raise or lower the point of interest.

Frame the Camera on the Selected Objects

RoadRunner can center (that is, frame) the camera on the currently selected objects in any tool.

  1. Select one or more objects (for example, the road, control node, prop, lane, and so on, depending on the current tool).

  2. Press the F key, or select View > Frame Selected from the Menu Bar to frame the camera's point of interest on the selected object.

Change View Projections

The RoadRunner camera can use either a perspective or orthographic viewing projection.

  • The perspective projection is the normal viewing projection causing distant objects to appear smaller than close objects.

  • The orthographic projection is similar to what you might find in a CAD tool. It is useful for precise positioning, usually from a top-down point of view. In orthographic mode, objects do not change apparent size as they get closer or further away.

The camera controls work the same in both projection modes.

Set the Camera Into Perspective View Mode

Press the P key or select View > Perspective from the Menu Bar.

Set the Camera Into Orthographic View Mode

Press the O key or select View > Orthographic from the Menu Bar.

Set the Camera View Direction

You can set the view direction to due north, south, east, west, or top-down directions. Select the directional option you want by selecting View > Direction menu from the Menu Bar.

Toggle View Options

Various draw settings for the 3D display window can be toggled through the View menu. Examples of these various draw settings include:

  • Wireframe: Displays outlines of rendered triangles

  • Topographic: Displays topographic lines based on altitude

  • Measurements: Displays measurement indicators defined in the Measurement Tool

To toggle view options, select View from the Menu Bar and choose the desired setting.