00:00In this quick video, you learn how to change the look of B-Splines from this to a cleaner look.
00:07Select the Part Design Workbench
00:12and create a new sketch.
00:16Then select a plane to sketch on.
00:18It doesn't matter which one in this example.
00:21Now select the B-Spline tool
00:26and draw a B-Spline with a few points.
00:30The number does not matter.
00:39Right-click twice to exit the B-Spline tool completely.
00:43You can see that this B-Spline has already been visually cleaned up.
00:47This video shows you how to do this.
00:49When you're in this sketch, go to the Sketch tab,
00:52go to Visual Helpers,
00:53and then to Toggle B-Spline Information Layer.
00:57First click on Toggle B-Spline Degree.
01:00Visibility of the number 3 on the center of the spline will be toggled.
01:04Degree 3, Cubic, is the standard default in FreeCAD and most CAD software.
01:10Each section is influenced by four control points,
01:13providing smooth transitions, curvature, continuity,
01:16that work well for organic shapes and industrial design.
01:19Now click on Toggle B-Spline Control Polygon,
01:23and you see all circles are connected with a line.
01:28When you align two circles,
01:30you can better see they're aligned because of the line.
01:45Go to Toggle B-Spline Control Polygon again to hide the connection lines.
01:53You see the circles are still aligned.
01:56They're aligned with constraint number 21.
01:59Select it and press Delete to remove the constraint.
02:03The circles are not aligned anymore.
02:08Now click on Toggle B-Spline Curvature Comb,
02:14and you see you can toggle the visibility of the green lines around the curves.
02:24Click on Toggle B-Spline Curvature Comb to hide the lines again.
02:35Now click on Toggle B-Spline Knot Multiplicity,
02:39and you see a small number appear next to each knot.
02:42That multiplicity is a number that tells you how tightly constrained or sharp the curve is allowed to bend at
02:48that specific point.
02:51You can turn it off when you want.
03:02Finally, click on Toggle B-Spline Control Point Weight,
03:06and you see a number shown next to each circle.
03:09Each circle has the same weight of 1.
03:12A higher value increases the magnetic pull of that specific control point.
03:17Click on it again to hide the number.
03:23Most of these options do not always need to be visible when creating splines in FreeCAD.
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03:31Thanks!
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