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Marking Curve Tool

Marking Curve Tool button

The Marking Curve Tool can be used to place straight or curved markings at arbitrary locations.

Marking curves show up on both road surfaces and terrain surfaces. They use the same linear marking style assets as the Lane Marking Tool.

Although you can create free-form crosswalks with this tool, use the Crosswalk And Stop Line Tool where possible, because crosswalks created in that tool have more semantic linkage to the road topology.

Edit Marking Curves

See Curve Editing.

Note

When creating a new marking curve, you must have a Lane Marking Asset or Crosswalk Marking Asset selected in the Library Browser.

Marking Curve Attributes

AttributeDescription
Marking StyleThe Lane Marking Asset or Crosswalk Marking Asset assigned.
Flip Side

If true, the order of the marking stripes is reversed (for marking types with more than one stripe).

Note that this value is initially computed based on the neighboring lane travel directions when a Lane Marking Asset is assigned with the Lane Marking Tool.

Start Blend Distance

If nonzero, the start of the marking is gradually faded to transparent over this distance.

Note that the start is dependent on the digitization direction of the marking curve or road.

This option has an effect only if the material's diffuse texture contains transparent (nonopaque) content.

End Blend Distance

If nonzero, the end of the marking will be gradually faded to transparent over this distance.

See the additional comments in "Start Blend Distance".

Phase ShiftThis is used to offset dashed marking types along the curve. This is useful for synchronizing the spacing of dashes where two roads meet.
ColorColor multiplied by the material color.
MaterialMaterial to use for this marking instance. If set, this will override the material in the Lane Marking Asset. If not set, the marking asset's material is used instead.
Texture Scale

Scale to apply to each dimension of the marking's texture coordinates.

Note

Note that the texture coordinate space depends on the value of the Curve Space Texture option in the Lane Marking Asset.

Texture RotationIf nonzero, specifies an additional rotation to apply to the marking's texture coordinates.
Texture OffsetIf nonzero, specifies an additional offset to apply to each dimension of the marking's texture coordinates.
Sort IndexWhen markings of any type overlap, this value is used to determine which markings appear on top. Given two overlapping markings, the marking with the higher sort index is drawn on top.

Change the Marking on a Curve

  1. Click the Marking Curve Tool button.

  2. Select the marking curve you want to change.

  3. Click and drag a Lane Marking Asset or Crosswalk Marking Asset from the Library Browser onto the Marking widget in the Attributes Panel.

Alternatively, click and drag a Lane Marking Asset or Crosswalk Marking Asset from the Library Browser directly onto the desired marking curve. You do not need to select the Marking Curve Tool first to perform this operation, because it works from any tool. Once done, RoadRunner automatically enters the Marking Curve Tool and selects the changed marking curve for further editing.