Provides controls for linear road-marking objects.
You can create linear road-marking objects using the Road Markings Style Editor.
Sets the width of the longitudinal gap in the centre of each road-marking line. Lets you create double road-marking lines using a single road-marking object. The width of each double line is half of the difference between the overall road-marking Width and the Center Gap Width.
When a road marking is draped across a ground surface, to be visible it must be raised above the underlying surface slightly. The Scene Settings rollout has a global setting for this. Occasionally, individual road-marking objects need to be raised by a greater amount to cater for unusual contours in the underlying ground surface. When this happens, turn off Use Global Vertical Shift, and set a local value.
In general, you shouldn't change these settings. The default values provide the best compromise between smooth-looking road markings and geometric simplicity. They keep the face count in the scene as low as possible. However, occasionally an individual road-marking object might display undesirable geometric characteristics that you can improve by overriding the defaults.
A good example of this is where road markings are placed over a very tight radius and the resulting geometry does not smoothly follow the curve. In this case, more complexity in the road marking geometry is required, and specific optimization values can overcome the problem.
Alternatively, it might be necessary to decrease the face count of a specific road-marking object to remove unnecessary complexity in its geometry. This can decrease rendering time for your visualization.
At each Spacing interval, the tangent of the parent shape at that point is compared with the tangent at the previous point. If the angle in degrees between these two tangents is larger than the Threshold angle, Civil View creates a set of vertices. If the angle is less, Civil View moves on to the next Spacing interval and compare angles again. Once the angle is exceeded, it creates a set of vertices and the process starts again until the end of the shape is reached.
The maximum distance over which a set of vertices must be created. This comes into effect if the Spacing and Threshold values do not allow for a set of vertices to be created over a distance less then or equal to this value. This can be useful over very long stretches of almost straight road where slight changes in horizontal curvature or vertical alignment are not detected by the Spacing and Threshold parameters.
Allows the parameters of a collection of objects of the same basic type to be shared or instanced.
See Parameter Instancing for further details.