Better way of defining a curve?

[ajayre]

But I gotta try that WizoScript - can it output to Excel?

Currently it can output CSV - https://docs.python.org/2/library/csv.html

Andy

 

[JST]

What IS Wizoscript?????

 

[wazzu83]

What IS Wizoscript?????

LINK

 

[Lew_Merrick]

What IS Wizoscript?????

It is Andy Ayre's scripting/programming language he is developing for Geomagic. I will firmly attest that, though I have not had time to really run it through its paces, it may well be the most exciting development for Geomagic underway today!

Kudos to Andy!

 

[ajayre]

But I gotta try that WizoScript - can it output to Excel?

Version 1.50 (http://www.wizotools.com/wizoscript) includes two libraries for reading/writing Excel spreadsheets:

- xlrd/xlwr for .xls files (http://www.python-excel.org/)

- openpyxl for .xlsx files (http://pythonhosted.org/openpyxl/)

I will write examples and maybe a tutorial in due course.

Andy

 

[Oldbelt]

JST.

You have a hell of a lot points in your sketch.
Where do you get them from ???.
You also say its at parabola.If its a parabola, why not just calculate a bunch of points in exel and import the points to GM as a B-spline.
That precise for must technical purposes.
Thats the must direct way to input curves defined with a formula.

JST. Please answear, those simple questions, and keep your problem simpel.
I wonder what use you have of this simpel curve, with all those defining points,
You said something about raytracing, thats my expertise area, my businees is based on this, I can see your need.

 

[ajayre]

You said something about raytracing, thats my expertise area, my businees is based on this, I can see your need.

I'm not a mechanical engineer, so please forgive me - what is the nexus between raytracing and mechanical CAD? I don't mean rendering an object but designing an object. Optics-based items perhaps?

Andy

 

[JST]

Yes, it's somewhat optical. Can't discuss the usage. Sorry.

I was presented with this curve, which I do not have a "provenance" for. I checked it to ensure a good enough focus.

It is supposed to be a parabola, somewhat modified. Not my business to derive the equation from it. And I had to change it to show it here, so don't take much from the exact shape

 

[Oldbelt]

Andy.
Optical "system" designed in Alibre two lenses a mirror and a target plate..
Used for raytracing :

 

[JST]

So I did go through the large number of points and made it a b-spline.

However, that was probably a severe step backwards away from a good solution.

The problem is that the new surface of the extruded b-spline is not recognized as a surface by the constraint function.

Constraints work on edges of it, but nothing recognizes the actual surface *as* a surface, so nothing can apparently be aligned, mated, etc with or to it.

That seems to be a worse problem than what I already had. So, for those suggesting a spline, is there a way around that problem?

 

[Oldbelt]

JST.
Upload your file please, to give a better understanding of your problem.

 

[JST]

here:

viewtopic.php?f=10&t=17587

But I think this problem is not soluble, so I will try to continue with the curve as defined by all the points here... the spline was not a success.

 

[indesign]

Add points,planes and axis to use as means for alignment on these types of surfaces. Since a spline can not have even a tangent constraint then you can define the constraining surfaces using the reference geometry.