why can I choose between higher degree b- spline or bezier spline in the single span style spline tool? What is the difference? where are the advantages and disadvantages to use either?
Style Spline: What is it and why is it useful?
Hi Paul!I know this thread already! This does not really answer my question though. The option that I sent in my screenshot occurs in the style spline tool only. So within a single span style spline I still can choose to get the higher math of a b-spline or the bezier math. Where is the difference?
I hope you can help me width that to understand why this option is there.B,M
Hello Manuel,.. I do not see your "screenshot"?
I'll attach a image... and I not sure I follow.. so I think you're saying the a single Style (3 points) and a single B-Spline (2 points).. what is the difference?
The B-Spline has additional control at the ends.
("is the math the same?")... without activating the end controls.. yeah, probably, they look/behave almost identical?
If you like maths you might like this video De Casteljau Bezier Curves | Algebraic Calculus One | Wild Egg - YouTube
A bezier spline can only be a single span. B Spline can multi span. So if you select deg 3 Bspline and create a spline with more than 4 points, it'll be a multi span B Spline. If you stop at 4 cvs, it'll be a single span and therefore a bezier spline. As to differences, moving cvs in a bezier will chance the shape along the entire spline. Moving CVs in a multi span B spline will only affect areas of the curve shape, depending on degree and amount of points. Also, you can never have internal continuity breaks in a bezier versus a multi span b spline. Loads on info online, that's where I got all of this from
Thank you Andrew!I always used single span b spline curves width the right amount of CVs (coming from alias and rhino). So you say, doing this if you go for single span there is no difference at all? I know the theory behind it, I was just confused why solidworks would give me this option at all. The style spline is always single span bezier anyways and for multispan, you would use the normal b spline too width the control polygons.Cheers,Manuel
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