Grid

The Get->Primitive commands are available in all modules except Tools. They let you define primitive objects which are basic objects with a fixed geometric structure.

For detailed descriptions of polygon mesh objects, curves, and surfaces, as well as the modelling tasks you can perform with them, see the Modelling User's Guide.

The Get->Grid command creates a grid, which is an open 3D object that is a flat polygon mesh, patch, or NURBS surface.

1. Choose the Get->Grid command.
   
   The Create Rectangular Grid dialogue box is displayed.
   
2. Select Polygon, Patch, or NURBS as the object type.
3. For patches, select the type of curve (Linear, Bezier, Cardinal, or B-Spline) in X and Z.
4. For NURBS, select the degree of curve (Linear, Quadratic or Cubic) in X and Z.
5. For all grid types, set the X and Z Cell Size and Count.

Parameters

Object Type

• Polygon creates a polygon mesh object.
• Patch creates a patch surface using Linear, Bezier Cardinal, or
  B-Spline curve types in x and z.
• NURBS creates a NURBS surface of the first degree (linear), second degree (quadratic) or third degree (cubic), in either the x or z direction, or both.
  • Linear creates a NURBS surface of the first degree in the chosen direction. The resulting direction is of continuity zero (positional continuity). This is the default value.
  • Quadratic creates a NURBS surface of the second degree. The resulting direction is of continuity 1 (positional and tangential continuity).
  • Cubic creates a NURBS surface of the third degree in the chosen direction. The resulting direction is of continuity two (positional, tangential and curvature continuity).

X Cell Size

Size of the x-side of each polygon (ref grid). Range is [0, ].

Z Cell Size

Size of the z-side of each polygon (ref grid). Range is [0, ].

X Cell Count

Number of polygons in the x-axis (definition). Range is [1, ].

Z Cell Count

Number of polygons in the z-axis (definition). Range is [1, ].

Last updated 02-apr-1998