Spline Extrude component reference
Use the Spline Extrude component to customize the geometry of the mesh you extrude on a spline.
Note: If you add Spline Extrude to a GameObject that already has a mesh, that mesh is replaced with a new one.
Source Spline Container
Select a GameObject that has an attached Spline component you want to extrude a mesh on.
You can use a Spline as a source for the extruded mesh of one or more GameObjects. Edits you make to the source Spline then update those GameObjects. For example, if you want to create a street with a sidewalk, you can create a Spline for the street, and then use the street Spline as a source for a sidewalk GameObject. Any changes you make to the street layout update the sidewalk to match.
Shape Extrude
| Property | Description | |
|---|---|---|
| Type > Circle | Create a shape with a round cross-section. | |
| Circle Settings > Sides | Increase to create a smoother surface. The minimum value is 2. |
|
| Type > Square | Create a shape with a square cross-section. | |
| Type > Road | Create a shape with a flat cross-section and a slight lip. | |
| Type > Spline Profile | Use a different spline as a template for the current spline. | |
| Spline Profile Settings > Template | Select the spline container you want to use as a template. | |
| Spline Profile Settings > Spline Index | If the template container has more than one spline, select the spline you want. | |
| Spline Profile Settings > Side Count | Increase to create a smoother surface. The minimum value is 2. |
|
| Spline Profile Settings > Axis | Which of the template spline axes to follow when drawing this spline. |
Geometry
| Property | Description |
|---|---|
| Auto Refresh Generation | Allow the mesh to update at runtime if the spline changes. |
| Frequency | How many times a second to refresh the mesh. |
| Radius | Width of the extrusion, measured from the spline path. |
| Segments Per Unit | Increase the value to create smoother curves. |
| Cap Ends | Fill the ends of an open-ended mesh. |
| Flip Normals | Reveal the inside of the 3D shape. |
Advanced
| Property | Description |
|---|---|
| Range | To extrude only some of the spline, define a range. 0 is the first spline point, and 100 is the last one. |
| Percentage | Another way to control the Range. |
| Update Colliders | If the spline has a collider, update the collider to match the 3D shape as you change the extrusion properties. |
Mesh Filter and Mesh Renderer components
When you add the Spline Extrude component to a GameObject, the Unity Editor adds two more components that all 3D GameObject need: