SoIndexedNurbsSurface Class Reference
[Shapes]

Indexed NURBS surface shape node. More...

#include <Inventor/nodes/SoIndexedNurbsSurface.h>

Inheritance diagram for SoIndexedNurbsSurface:
SoShape SoNode SoFieldContainer SoBase SoRefCounter SoTypedObject

List of all members.

Public Member Functions

virtual SoType getTypeId () const
 SoIndexedNurbsSurface ()

Static Public Member Functions

static SoType getClassTypeId ()

Public Attributes

SoSFInt32 numUControlPoints
SoSFInt32 numVControlPoints
SoMFInt32 coordIndex
SoMFFloat uKnotVector
SoMFFloat vKnotVector
SoSFInt32 numSControlPoints
SoSFInt32 numTControlPoints
SoMFInt32 textureCoordIndex
SoMFFloat sKnotVector
SoMFFloat tKnotVector

Detailed Description

Indexed NURBS surface shape node.

This shape node represents a NURBS surface based on the knot vectors and the control points that you specify. The uKnotVector and vKnotVector fields specify floating-point arrays of values; the values are the coordinates of the knot points in the surface, and you must enter them in non-decreasing order. The numUControlPoints and numVControlPoints fields specify the number of control points the surface will have in the U and V parametric directions, and will use the current coordinates that are indexed from the coordIndex field.

You can get a surface of minimum order (2) in the U or V directions by specifying two more knots than control points in that direction and having at least two control points in that direction. This surface would appear creased in one direction.

You can get a surface of maximum order (8) in the U or V directions by specifying eight more knots than control points in that direction and having at least eight control points in that direction.

The control points of the NURBS surface are transformed by the current cumulative transformation. The surface is drawn with the current light model and drawing style. The coordinates, normals, and texture coordinates of a surface are generated, so you cannot bind explicit normals or texture coordinates to a NURBS surface. The first material in the state is applied to the entire surface.

The surface is trimmed according to the currently defined profiles curves.

When default texture coordinates are applied to a NURBS surface, the edges of the texture square are stretched to fit the surface. The axes of the texture are called S and T; S is horizontal and T is vertical. The axes of the NURBS surface are called U and V; U is horizontal and V is vertical. You can also define texture coordinates explicitly with the S,T location point, the knot vectors, and the current texture coordinates.

NOTE:

FILE FORMAT/DEFAULT

ACTION BEHAVIOR

SEE ALSO

SoFullSceneAntialiasing, SoIndexedNurbsCurve, SoNurbsSurface, SoProfile


Constructor & Destructor Documentation

SoIndexedNurbsSurface::SoIndexedNurbsSurface (  ) 

Creates an indexed NURBS surface node with default settings.


Member Function Documentation

static SoType SoIndexedNurbsSurface::getClassTypeId (  )  [static]

Returns the type identifier for this class.

Reimplemented from SoShape.

virtual SoType SoIndexedNurbsSurface::getTypeId (  )  const [virtual]

Returns the type identifier for this specific instance.

Reimplemented from SoShape.


Member Data Documentation

Coordinate indices.

Number of control points in the S direction.

Number of control points in the T direction.

Number of control points in the U direction.

Number of control points in the V direction.

The knot vectors in the S direction.

Texture coordinate indices.

The knot vectors in the T direction.

The knot vectors in the U direction.

The knot vectors in the V direction.


The documentation for this class was generated from the following file:

Open Inventor Toolkit reference manual, generated on 8 Apr 2021
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