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NURBSeditor

An Interactive Editor for Three Dimensional NURBS surfaces. Written in Processing using the G4P GUI library.

Alt text

Running the program

  1. Download Processing at https://processing.org/download/.
  2. Place the files in C:\Users\YOURNAME\Documents\Processing
  3. Open “NURBSeditor.pde”.
  4. Click the Run button.
  5. The program can be stopped by pressing the Stop button.

User Interface

  • Each point can be dragged in the left point array in the main window by clicking and holding down the left mouse button. The z value is changed by scrolling the mousewheel.
  • Adding and Removing rows/columns is done by clicking the related point and pressing the respective Add and Remove buttons on the left. [a] 3D NURBS Surface editor
  • The deBoor control points are represented as blue squares.
  • The resulting surface is in pink.
  • The knot values, weight, resolution (N,M), and orders (k, l) can be changed in the smaller, second window.
  • Press ‘h’ to hide the control polygon.
  • Press space to hide the surface triangles (in black).
  • Hold the right mouse button and drag to rotate the surface.