Blend Surface Between Rail Curves

Use it!

(3D only) Used to construct a blending B-spline surface between two surfaces (extruded surfaces, surfaces of revolution, cones, or B-spline surfaces) along their rail curves. A rail curve is an element (line, arc, line string, ellipse, complex shape, complex chain, or B-spline curve) lying on the surface.
see footnote 100

Blend Surfaces Between Rail Curves Tool Settings

Tool Setting	Effect
Blend Type	Sets the type of blend. Round — smooth circular blend. Chamfer — chamfer blend.
Tolerance	Determines the number of (sampled) points used to create the blend.

construct a blending surface between two B-spline surfaces along their rail curves

1. Select the Blend Surface Between Rail Curves tool.


2. Identify the first B-spline surface.


3. Identify the first rail curve.


4. Identify the second rail curve.


5. Enter a data point to display the blending surface.


6. Accept the blending surface.

   Creating a blend surface between rail curves. Left: Identify first surface (1), first rail curve (2), then second surface (3) and second rail curve (4). Right: Accept (5) to create the rail curve (Blend Type: Chamfer in this example)

Key-in: BLEND RAILS

If a rail curve is closed, use the Change Element Direction tool in the Modify Curves tool box to re-orient the curve to match the direction and starting point of the other rail curve.