Open Inventor Release 2023.2.3
 
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Public Member Functions | Static Public Member Functions | Public Attributes | Friends | List of all members
SoNurbsSurface Class Reference
Inventor » Nodes » Shapes

NURBS surface shape node. More...

#include <Inventor/nodes/SoNurbsSurface.h>

+ Inheritance diagram for SoNurbsSurface:

Public Member Functions

virtual SoType getTypeId () const
 Returns the type identifier for this specific instance.
 
 SoNurbsSurface ()
 Creates a NURBS surface node with default settings.
 
- Public Member Functions inherited from SoShape
virtual SbBool affectsState () const
 Overrides default method on SoNode.
 
ShapeType getShapeType ()
 Gets the current shape Full Scene Antialiasing type.
 
- Public Member Functions inherited from SoNode
virtual void setOverride (const SbBool state)
 Turns the override flag on or off.
 
virtual SbBool isOverride () const
 Returns the state of the override flag.
 
virtual SoNode * copy (SbBool copyConnections=FALSE) const
 Creates and returns an exact copy of the node.
 
virtual void touch ()
 Marks an instance as modified, simulating a change to it.
 
- Public Member Functions inherited from SoFieldContainer
void setToDefaults ()
 Sets all fields in this object to their default values.
 
SbBool hasDefaultValues () const
 Returns TRUE if all of the object's fields have their default values.
 
SbBool fieldsAreEqual (const SoFieldContainer *fc) const
 Returns TRUE if this object's fields are exactly equal to fc's fields.
 
void copyFieldValues (const SoFieldContainer *fc, SbBool copyConnections=FALSE)
 Copies the contents of fc's fields into this object's fields.
 
SoNONUNICODE SbBool set (const char *fieldDataString)
 Sets one or more fields in this object to the values specified in the given string, which should be a string in the Open Inventor file format.
 
SbBool set (const SbString &fieldDataString)
 Sets one or more fields in this object to the values specified in the given string, which should be a string in the Open Inventor file format.
 
void get (SbString &fieldDataString)
 Returns the values of the fields of this object in the Open Inventor ASCII file format in the given string.
 
virtual int getFields (SoFieldList &list) const
 Appends references to all of this object's fields to resultList, and returns the number of fields appended.
 
virtual int getAllFields (SoFieldList &list) const
 Returns a list of fields, including the eventIn's and eventOut's.
 
virtual SoField * getField (const SbName &fieldName) const
 Returns a the field of this object whose name is fieldName.
 
virtual SoField * getEventIn (const SbName &fieldName) const
 Returns a the eventIn with the given name.
 
virtual SoField * getEventOut (const SbName &fieldName) const
 Returns the eventOut with the given name.
 
SbBool getFieldName (const SoField *field, SbName &fieldName) const
 Returns the name of the given field in the fieldName argument.
 
SbBool enableNotify (SbBool flag)
 Notification at this Field Container is enabled (if flag == TRUE) or disabled (if flag == FALSE).
 
SbBool isNotifyEnabled () const
 Notification is the process of telling interested objects that this object has changed.
 
virtual void setUserData (void *data)
 Sets application data.
 
void * getUserData (void) const
 Gets user application data.
 
- Public Member Functions inherited from SoBase
virtual SbName getName () const
 Returns the name of an instance.
 
virtual void setName (const SbName &name)
 Sets the name of an instance.
 
void setSynchronizable (const bool b)
 Sets this to be a ScaleViz synchronizable object.
 
bool isSynchronizable () const
 Gets the ScaleViz synchronizable state of this object.
 
- Public Member Functions inherited from SoRefCounter
void ref () const
 Adds a reference to an instance.
 
void unref () const
 Removes a reference from an instance.
 
void unrefNoDelete () const
 unrefNoDelete() should be called when it is desired to decrement the reference count, but not delete the instance if this brings the reference count to zero.
 
int getRefCount () const
 Returns current reference count.
 
void lock () const
 lock this instance.
 
void unlock () const
 unlock this instance.
 
- Public Member Functions inherited from SoTypedObject
SbBool isOfType (const SoType &type) const
 Returns TRUE if this object is of the type specified in type or is derived from that type.
 
template<typename TypedObjectClass >
SbBool isOfType () const
 Returns TRUE if this object is of the type of class TypedObjectClass or is derived from that class.
 

Static Public Member Functions

static SoType getClassTypeId ()
 Returns the type identifier for this class.
 
- Static Public Member Functions inherited from SoShape
static SoType getClassTypeId ()
 Returns the type identifier for this class.
 
static SbBool isPrimitiveRestartAvailable (SoState *state=NULL)
 Returns TRUE if the primitive restart feature is available.
 
- Static Public Member Functions inherited from SoNode
static SoType getClassTypeId ()
 Returns the type identifier for this class.
 
static SoNode * getByName (const SbName &name)
 A node's name can be set using SoBase::setName().
 
static int getByName (const SbName &name, SoNodeList &list)
 A node's name can be set using SoBase::setName().
 
- Static Public Member Functions inherited from SoFieldContainer
static SoType getClassTypeId ()
 Returns the type of this class.
 
- Static Public Member Functions inherited from SoBase
static SoType getClassTypeId ()
 Returns type identifier for this class.
 
- Static Public Member Functions inherited from SoTypedObject
static SoType getClassTypeId ()
 Returns the type identifier for this class.
 

Public Attributes

SoSFInt32 numUControlPoints
 Number of control points in the U direction.
 
SoSFInt32 numVControlPoints
 Number of control points in the V direction.
 
SoSFInt32 numSControlPoints
 Number of control points in the S direction.
 
SoSFInt32 numTControlPoints
 Number of control points in the T direction.
 
SoMFFloat uKnotVector
 The knot vectors in the U direction.
 
SoMFFloat vKnotVector
 The knot vectors in the V direction.
 
SoMFFloat sKnotVector
 The knot vectors in the S direction.
 
SoMFFloat tKnotVector
 The knot vectors in the T direction.
 
- Public Attributes inherited from SoShape
SoSFBool boundingBoxIgnoring
 Whether to ignore this node during bounding box traversal.
 

Friends

class SoNurbsBREPAction
 
class SoNurbsGroup
 

Additional Inherited Members

- Public Types inherited from SoShape
enum  ShapeType {
  POINTS ,
  LINES ,
  POLYGONS ,
  TEXT
}
 Basic type for antialiased rendering for this shape (Do not consider the SoDrawStyle property currently in the state). More...
 

Detailed Description

NURBS surface shape node.

This shape node represents a NURBS surface based on the node's knot vectors and on control points constructed from the current coordinates. The current coordinates are used in row-major order (the V direction corresponds to the rows). The number of coordinates used is determined by the numUControlPoints and numVControlPoints fields. The uKnotVector and vKnotVector fields contain floating point arrays of non-decreasing values.

The order of the surface in the U and V directions is defined as the number of knots minus the number of control points in the particular direction. The largest order allowed for a NURBS surface is 8.

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 profile's 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. The number of texture coordinates used is determined by the numSControlPoints and numTControlPoints fields.

The approximation of the surface by polygons is affected by the current complexity value.

NOTE:

FILE FORMAT/DEFAULT

    NurbsSurface {
    numUControlPoints 0
    numVControlPoints 0
    numSControlPoints 0
    numTControlPoints 0
    uKnotVector 0
    vKnotVector 0
    sKnotVector 0
    tKnotVector 0
    }

ACTION BEHAVIOR

    SoGLRenderAction
    Draws the surface based on the current coordinates, material, and so on.

    SoRayPickAction
    Picks the surface based on the current coordinates and transformation.

    SoGetBoundingBoxAction
    Computes the bounding box that encloses all control points of the surface with the current transformation applied to them. Sets the center to the average of the control points.

    SoCallbackAction
    If any triangle callbacks are registered with the action, they will be invoked for each successive triangle approximating the surface.

SEE ALSO

SoIndexedNurbsSurface, SoNurbsCurve, SoNurbsProperty, SoProfile

Definition at line 142 of file SoNurbsSurface.h.

Constructor & Destructor Documentation

◆ SoNurbsSurface()

SoNurbsSurface::SoNurbsSurface ( )

Creates a NURBS surface node with default settings.

Member Function Documentation

◆ getClassTypeId()

static SoType SoNurbsSurface::getClassTypeId ( )
static

Returns the type identifier for this class.


◆ getTypeId()

virtual SoType SoNurbsSurface::getTypeId ( ) const
virtual

Returns the type identifier for this specific instance.

Reimplemented from SoShape.

Reimplemented in SoIndexedNurbsSurface.

Friends And Related Symbol Documentation

◆ SoNurbsBREPAction

friend class SoNurbsBREPAction
friend

Definition at line 227 of file SoNurbsSurface.h.

◆ SoNurbsGroup

friend class SoNurbsGroup
friend

Definition at line 228 of file SoNurbsSurface.h.

Member Data Documentation

◆ numSControlPoints

SoSFInt32 SoNurbsSurface::numSControlPoints

Number of control points in the S direction.

Default is 0. Not used.

Definition at line 164 of file SoNurbsSurface.h.

◆ numTControlPoints

SoSFInt32 SoNurbsSurface::numTControlPoints

Number of control points in the T direction.

Default is 0. Not used.

Definition at line 170 of file SoNurbsSurface.h.

◆ numUControlPoints

SoSFInt32 SoNurbsSurface::numUControlPoints

Number of control points in the U direction.

Default is 0.

Definition at line 152 of file SoNurbsSurface.h.

◆ numVControlPoints

SoSFInt32 SoNurbsSurface::numVControlPoints

Number of control points in the V direction.

Default is 0.

Definition at line 158 of file SoNurbsSurface.h.

◆ sKnotVector

SoMFFloat SoNurbsSurface::sKnotVector

The knot vectors in the S direction.

Default is 0. Not used.

Definition at line 188 of file SoNurbsSurface.h.

◆ tKnotVector

SoMFFloat SoNurbsSurface::tKnotVector

The knot vectors in the T direction.

Default is 0. Not used.

Definition at line 194 of file SoNurbsSurface.h.

◆ uKnotVector

SoMFFloat SoNurbsSurface::uKnotVector

The knot vectors in the U direction.

Default is 0.

Definition at line 176 of file SoNurbsSurface.h.

◆ vKnotVector

SoMFFloat SoNurbsSurface::vKnotVector

The knot vectors in the V direction.

Default is 0.

Definition at line 182 of file SoNurbsSurface.h.

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