What is Nurbs in Autocad?

Asked By: Iban Hundanov | Last Updated: 28th February, 2020
Category: technology and computing graphics software
4/5 (486 Views . 36 Votes)
NURBS stands for nonuniform rational B-spline curves. In AutoCAD, you can treat a NURBS surface as a 3D spline with fit points. These fit points can be used to manipulate the geometry. In this article, I will make a simple 3D surface representing the top surface of a computer mouse using NURBS and other surface tools.

Click to see full answer


Keeping this in view, what does Nurbs stand for?

Non-uniform rational basis spline

Also Know, how do you join surfaces in AutoCAD? Select the space where you want to join 2 surfaces. Click Space tab Modify panel Edit In Place. Click Edit In Place tab Modify panel Join Faces. Select the edge separating the 2 surfaces, and press Enter.

Keeping this in view, how do you make a Nurbs surface?

Creating NURBS surfaces

  1. Create NURBS primitives.
  2. Create a flat surface inside a curve.
  3. Skin a surface across profile curves.
  4. Sweep a profile curve along a path curve.
  5. Sweep one or more profile curves along two path curves (birail)
  6. Create a surface within bounding curves.
  7. Create a four-sided surface with continuity (Square)

What is System variable AutoCAD?

System variables are the settings that AutoCAD checks before it decides how to do something. Most system variables are controlled by the OPtions command, but you can also change the value of a system variable by simply typing its name at the AutoCAD command prompt and pressing Enter.

33 Related Question Answers Found

What is the spline?

In mathematics, a spline is a special function defined piecewise by polynomials. Splines are popular curves in these subfields because of the simplicity of their construction, their ease and accuracy of evaluation, and their capacity to approximate complex shapes through curve fitting and interactive curve design.

What is Nurbs in Catia?

Non-uniform rational basis spline (NURBS) is a mathematical model commonly used in computer graphics for generating and representing curves and surfaces which offers great flexibility and precision for handling both analytic (shapes defined by common mathematical formulas) and freeform shapes.

Does SolidWorks use Nurbs?

SolidWorks® Standard delivers robust 3D design capabilities, performance, and ease-of-use. Rhino is NURBS-based 3-D modeling software that user can edit the any surface by control point. It is very easy to create an organic shape modeling. But, user is quiet hard to re-modify when the model has been completed.

What are Nurbs in blender?

NURBS stands for Non Uniform Rational Bezier Splines . They are a way of defining curves in 3D space through mathematical formulas. NURBS surfaces are a method of 3D modeling using said curves to define object surfaces, as opposed to using a mesh based polygon subdivision method.

What are Nurbs in Maya?


NURBS (Non-Uniform Rational B-Splines) are one geometry type you can use to create 3D curves and surfaces in Maya. The other geometry types that Maya provides are polygon and subdivision surfaces. Non-Uniform refers to the parameterization of the curve.

What is the use of insert knot option?

Insert knot: You are asked for a knot value between 0.0 and 1.0 and it is then inserted. The program checks that the knot multiplicity is not greater than the order. This option can be used to have more points defining the same surface.

What is a knot vector?

A knot vector Control points are familiar to people who have used Bézier curves in applications such as Illustrator and MacDraw. The knot vector is an additional feature of the Nurb representation. The curve is a function P(u) that returns a point P on the curve for a particular value of the parameter u.

How do you create a Nurbs curve in Maya?

Draw NURBS curves
  1. Select Create > Curve Tools > CV Curve Tool.
  2. Click to place the CVs. The first CV looks like a hollow box; subsequent CVs are dots. Hulls are drawn between the CVs as you place them. For each CV after the third one you place, the shape of the curve is drawn.
  3. Press Enter to finish the curve.

How do you extrude a curve in Maya?

Extrude edges or faces along a path curve
  1. Select the edges/or faces you want to extrude and the curve you want to extrude along.
  2. Select Edit Mesh > Extrude > .
  3. Turn on either the Selected or Generated options.
  4. Click Extrude.
  5. Use the controls in the Attribute Editor or Channel Box to edit the extrusion.

How do you curve a surface in Maya?


  1. Select the surface on which you want to draw a curve-on-surface.
  2. In the Status Line, click the “Make the selected object live” icon.
  3. Choose Create > CV Curve Tool or Create > EP Curve Tool.
  4. Draw a curve on the live surface.
  5. When the curve is finished, click the “Make selected object live” icon again.

How do you use CV curve tool in Maya?

Choose Create->Curve Tools->CV Curve Tool->
Click on Curve Degree 3 Cubic for rounded curves, use 1 Linear for straight curves. Click the mouse to input CVs in any view to create a curve. 4 points need to be input for Cubic. Hit Enter button on the keyboard when you are finished.

How do you curve in Maya?

Help
  1. Select the object(s) you want to deform.
  2. Select Deform > (Create) Nonlinear > Bend > in the Animation menu set. The Bend Options window appears.
  3. Click the Basic and Advanced tabs and set the creation options.
  4. Click Create to create a bend deformer and close the options window.

How do you convert Nurbs to Polygons in Maya?

The NURBS to Polygons action bakes the NURBS UV values onto the corresponding polygonal vertices. Select the NURBS surface and choose Modify > Convert > NURBS to Polygons. A polygonal representation of the surface is created at the same position as the NURBS surface.

How do you make a Nurbs surface in Vectorworks?

To create a NURBS surface from curves:
  1. Draw two or more open NURBS curves to create an enclosed region.
  2. Select the NURBS objects being used to create the NURBS surface.
  3. Select Model > 3D Power Pack > Create Surface from Curves.

How do I merge surfaces in Autocad Civil 3d?


Re: Combining surfaces
  1. On the Civil 3D Toolspace, click on "Prospector" tab.
  2. Right mouse click on "Surfaces" and create a new surface.
  3. Expand the "Definition" subfeature for that new surface and right click on "Edits".
  4. Click "Paste Surface" and chose the original surface.
  5. Change the new surfaces style to display.

How do you merge faces in Solidworks?

In the PropertyManager, under Selections:
  1. Select faces and surfaces for Surfaces and Faces to Knit .
  2. Select Try to form solid to create a solid model from enclosed surfaces.
  3. Select Merge entities to merge faces with the same underlying geometry.

Why is AutoCAD so slow?

Cleaning AutoCAD files
Sometimes slow performance of your software is due to a problematic CAD file. You can remove unused elements from the CAD file using PURGE command to make it less bulky or you can also use AUDIT command to make it free from errors.