<< Click to Display Table of Contents >> Navigation: MechDesigner Reference & User Interface > 2.3 Part-Editor: > Geometry > Geometry | Blend-Curve |
See also: Blend-Curve dialog-box
Toolbar : |
Part-Editor: Geometry toolbar > Add Blend-Curve |
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Menu : |
Part-Editor: Add menu > Geometry sub-menu> > Add Blend-Curve |
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To Add : |
The Blend-Curve is now in the graphic-area. |
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To Edit : |
See Blend-Curve dialog-box and Drag-Handles |
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Note: Add with Free-Points*
Add with Merged-Points*
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Example |
How: |
Selection-Window Assembly-Tree |
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•Drag from the start |
Blend-Curven Pointn at each end of the CAD-Line The Blend-Curve is a child to the Part. |
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The default Angle, Curvature and Curvature Rate at the start-Point and end-Point of the Blend-Curve are zero. The images to the left and above are default Blend-Curves. •The Blend-Curve at the top has been added with a drag from bottom-left to top-right. •The Blend-Curve at the bottom has been added with a drag from top-right to bottom-left. |
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•Hover + Drag from the end-Point of a different sketch-element to merge the start-Point of as new Blend-Curve. When you merge the Blend-Curve with a sketch-element, the Blend-Curve matches the Angle, Curvature and Curvature Rate with the other sketch-element. |
![]() Continuous Curvature AND Curvature Rate |
A Blend-Curve can give a complex. but very useful 2D path Blend-Curve Parameters at its start-Point and end-Point: •Angle •Curvature •Curvature-Rate •Velocity Scaling
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![]() Tangent are NOT Smooth |
Use Blend-Curve to give a smooth sketch-path. See also Smoothness. If the Blend-Curve is to guide a Motion-Point which will also guide a Part, it is important that: •The motion of the Motion-Point along a sketch-path does not have discontinuities in position, velocity, acceleration, and jerk. and: •The shape of the sketch-path itself does not have discontinuities in angle, curvature, and rate-of-change of curvature. <<< This path is NOT smooth - Tangent arcs (with different Radii) have discontinuous Curvature. |
To show the Drag-Handles
You can now see the four(4) Drag-Handles - two(2) at the start-Point and two(2) at the end-Point The Drag-Handles are fixed (Green) when you show them. You cannot drag them in this state. There are two(2) Drag-Handle types:
Arrowhead Drag-Handle
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Circle Drag-Handle (See the bottom image)
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