Fits a 3D interpolation spline through specified work points. To end the spline and exit the command, click OK. To end the spline and remain in the command click Apply.
Click work points, vertices, or endpoints of geometry projected with the Include command into the 3D sketch.
Access
Ribbon:
3D Sketch tab
Draw panel
Interpolation Spline
In a 3D sketch, you can constrain splines:
- Use the Coincident command to attach spline endpoints to other endpoints, work points, curves, and Included geometry.
- Apply a tangent constraint between a spline and other curves and Included geometry.
- Use the Coincident command to attach the spline endpoint to the endpoint or vertex of the other curve or Included geometry before applying the tangent constraint.
- When placing the tangent constraint, select the spline first, then the other curve or Included geometry.
When editing an active sketch, adjust splines using context menu options.
- Split spline
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Cuts a spline at a selected spline point.
- Insert point
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Adds a shape point on the spline.
- Spline tension
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Adjusts spline tightness or looseness with a slider control.
- Close spline
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Creates a closed loop by joining beginning and endpoints of the spline.
- Display curvature
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Helps visualize differences between fit methods by showing spines to indicate curvature.
- Fit method
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Adjusts transition of the spline curve between points.
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Standard
Creates a spline with smooth continuity between points.
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Minimum energy
Creates a spline with smooth continuity and better curvature distribution. Takes longer to calculate than Standard method and increases file size.
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AutoCAD
Uses AutoCAD spline fitting method.
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- Activate Handle
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Right-click a spline and then select the Activate Handle option to enable the tangent handle. Manipulate the handle to adjust spline shape.
Adjusting the handle length by dragging grips modifies the distance the spline is tangent to the handle. A unitless dimension adjusts the handle length (where 1 represents neutral). For example, increasing the length to 2 causes the handle to "hug" the curve twice as much. Constraints placed on the handle can affect the curve around the radius of the curvature or constrain the curve direction.