Options
Add Point After
Adds a point after the selected point in the spline definition area.
Add Point Before
Adds a point before the selected point in the spline definition area.
Replace Point
Replaces the point selected in the spline definition area with the new point picked in the Graphics window.
Geometry on Support
Projects the spline onto the support surface. For this option to work all the defining points must lie on the support surface.
Close Spline
Closes the spline from the start point to the endpoint.
Remove Point
Removes the point from the spline definition.
Remove Tangent
Removes the tangency constraint from the spline definition.
Reverse Tangent
Reverses the tangency direction.
Remove Curve
Removes the curvature constraint from the spline definition.
Show Parameters
Expands the dialog and allows you to enter the tangency and curvature constraints in the Points Specifications area of the dialog.
Points Specifications
Defines the tangency and curvature conditions for each point of the spline.
Constraint Type
Lets you impose tangency and curvature constraints using existing lines, curves, and planes to define the direction. Use the Explicit option to define the tangency from a plane or line and the From curve option to define the tangency from a curve.
Tangent Direction
Right-clicking in the Tangent Dir. box displays the pop-up menu, which allows you to quickly pick the main axes of the part or define a plane or line on the fly.
Tangent Tension
Defines the tension value or weight that the tangent direction has. A higher tension value results in the spline being pulled more in the tangency direction.
Curvature Direction
Defines the curvature direction for the selected point. The curvature direction is projected on the plane normal to the tangent.
Curvature Radius
Defines the radius value for the curvature.
Frequently Asked Questions
- Is the spline curve generated a B�zier curve?
A: Only if the curve created has only 2 points because CATIA will always have to allow for 6th order in B�zier curves (2 points, 2 tangencies, and 2 curvatures). If you pick more than 2 points the result will be a multi-segmented arc with curvature continuity across the segments.
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