Free nurbs program

Today even, you might have problems getting proper code to output because, again, not many people will know how to get a post to output the proper code. In reality, I was able to hand code a single line of code that fit a surface that I was using to experiment with.

I was using Unigraphics at the time and analyzing a surface gave me the info needed to construct a single NURBS line of code. I had a small block of steel with a wavy surface to cut and it worked. I just repeated that single line of code after moving the Y axis each time. Came out pretty nice but the amount of work that went into it was not worth it.

At that time, no post developer would touch it. Definitely a niche application. I'm not sure you could get enough info from this to code by hand. From no less. Originally Posted by LockNut. Originally Posted by sfriedberg. Definitely not. You would need the coordinates and weights of all 14 control points to define the untrimmed surface, and you'd need the full detail of the trim curves to know where to stop. If your controller is NURBS-capable, and if the Gcode command it offers supports the degrees of the surface, you could probably code by hand using that command.

I've done something very similar for generating cross-sections through a NURBS surface for screen display. Perhaps needless to say, it's some industrial-strength applied math. I've never used it, I've only seen demos and know that it exists. Another example of how control abilities have stagnated But since so few control builders picked it up, it went nowhere.

I downloaded it and opened it up. I disagree. Here is an example of an object you could only create with a boolean operation: BooleanRequired. Where a complex surface must carve away another complex surface then a boolean is often the only way. Instead two edge loops on opposing faces of a corner are blended together to create the bevel over that corner. The result is that the radius changes along the curve like so: Rhino. The closest thing to this technique in Blender is bevel weight.

The reason parametric modeling is usually better suited for CAD than polygonal modeling is that in order to add detail to a poly-based mesh more polys are required. But in creating more polys the mesh becomes harder to work with. Parametric modeling is better for CAD because curves and surfaces are interpolated from the control points which define the shape. Polygonal modeling is approximation. Subdivision surface uses approximation scheme Catmull-Clark in Blender.

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