Edit streets and curves

In the Street editing tools , you can use Edit Streets/Curves to manually adjust streets and curves by using handles to edit nodes by moving them, changing the curvature, and adjusting the height of the nodes.

To edit street nodes , click the Street editing tools and click Edit Streets/Curves tool in the Tool Options window or press C. You can also click Graph > Edit Streets/Curves in the main menu.

Use the Edit Streets/Curves tool in conjunction with the other tools under Street editing , the Merge Nodes and Remove Nodes tools.

Node editing

Each graph segment has two curve handles, one attached at the start node and one attached at the end node of the segment. The green handles in the image below drive the start and end direction of the street. The yellow circle allows you to move he node.

To edit either the horizontal or vertical components of a curve handle, change the viewing angle relative to the segment node. A steep angle allows you to edit the horizontal component, with a glancing viewing angle of the vertical component. The dashed blue line (which is only visible when you hover over one of the curve handles) indicates the local weight of the curve. To lock the direction, press Shift before dragging a curve handle.

Curve handles are shown.

The green circles of the curve handles indicate the smoothing type of the node (manual direction, straight, or smooth). Click a curve handle (green circle) while pressing the Ctrl key to switch between the types.

The images below show the indication of node type in a green circle as follows: (first image—smooth with manual directions, second image—straight, and third image—smooth with automatic directions

Smooth with manual directions handle

Straight handle

Smooth with automatic directions handle

Note:

• The spline is mathematically defined by the two end points of the dashed blue lines, as well as the segment's start and end points.
• The segmentation of the street shapes defines the segmentation of the neighboring lot shapes. The overall number of segments per curve can help you avoid issues such as narrowly subdivided facades. The segmentation can be adjusted using the Precision parameter in the Segment Parameters or Node Parameters sections in the Inspector window.

Principle street handles

When an intersection has the Freeway or Junction type and has three or more connecting streets, the curve handles are accompanied by principle street handles. These allows you to edit the principle street at an intersection, changing the intersection geometry.

Dark green principle street handles on the left side of intersection.

Dark green principle street handles on the left side of intersection

Specify the principle streets by dragging a principle street handle from one street to another.

Note:

Dragging a principle street handle into the yellow circle at the intersection results in the default behavior.

Tool options

The Edit Streets/Curves tool options include the following:

Edit Streets/Curves
Snapping	Turn snapping options on and off. Select a node or segment and do one of the following: Drag the orange sphere to snap to terrain, vertices, edges, or guides on any plane. The orange sphere displays a black dot in the middle when it is snapped to the terrain. Drag the yellow disc to snap to vertices, edges, or guides on the x,z plane. Press Shift to temporarily turn on or off snapping.

To set street curves either smooth or straight or smooth, see Set curves straight or smooth.