SoIndexedNurbsSurface(3IV)NAMESoIndexedNurbsSurface (SoIndNurbs) - indexed NURBS surface shape node
INHERITS FROM
SoBase > SoFieldContainer > SoNode > SoShape > SoIndexedNurbsSurfaceSYNOPSIS
#include <Inventor_c/nodes/SoIndexedNurbsSurface.h>
typedef SoIndexedNurbsSurface
SoIndNurbs
Fields from class SoIndexedNurbsSurface:
SoSFInt32 numUControlPoints
SoSFInt32 numVControlPoints
SoMFInt32 coordIndex
SoMFFloat uKnotVector
SoMFFloat vKnotVector
SoSFInt32 numSControlPoints
SoSFInt32 numTControlPoints
SoMFInt32 textureCoordIndex
SoMFFloat sKnotVector
SoMFFloat tKnotVector
Functions from class SoIndexedNurbsSurface:
SoIndexedNurbsSurface * SoIndNurbsCreate()
SoType SoIndNurbsGetClassTypeId()
Functions from class SoNode:
void SoIndNurbsSetOverride(SoIndNurbs *this, SbBool state)
SbBool SoIndNurbsIsOverride(const SoIndNurbs *this)
SoNode * SoIndNurbsCopy(const SoIndNurbs *this, SbBool
copyConnections = FALSE)
SbBool SoIndNurbsAffectsState(const SoIndNurbs *this)
SoNode * SoIndNurbsGetByName(const char *name)
int SoIndNurbsGetByNameList(const char *name, SoNodeList
*list)
Functions from class SoFieldContainer:
void SoIndNurbsSetToDflts(SoIndNurbs *this)
SbBool SoIndNurbsHasDfltVals(const SoIndNurbs *this)
SbBool SoIndNurbsFldsAreEq(const SoIndNurbs *this, const
SoFieldContainer *fc)
void SoIndNurbsCopyFieldVals(SoIndNurbs *this, const
SoFieldContainer *fc, SbBool copyConnections =
FALSE)
SbBool SoIndNurbsSet(SoIndNurbs *this, const char
*fieldDataString)
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void SoIndNurbsGet(SoIndNurbs *this, SbString
*fieldDataString)
int SoIndNurbsGetFields(const SoIndNurbs *this,
SoFieldList *resultList)
SoField * SoIndNurbsGetField(const SoIndNurbs *this, const char
*fieldName)
SbBool SoIndNurbsGetFieldName(const SoIndNurbs *this, const
SoField *field, SbName *fieldName)
SbBool SoIndNurbsIsNotifyEnabled(const SoIndNurbs *this)
SbBool SoIndNurbsEnableNotify(SoIndNurbs *this, SbBool flag)
Functions from class SoBase:
void SoIndNurbsRef(SoIndNurbs *this)
void SoIndNurbsUnref(const SoIndNurbs *this)
void SoIndNurbsUnrefNoDelete(const SoIndNurbs *this)
void SoIndNurbsTouch(SoIndNurbs *this)
SoType SoIndNurbsGetTypeId(const SoIndNurbs *this)
SbBool SoIndNurbsIsOfType(const SoIndNurbs *this, SoType
type)
void SoIndNurbsSetName(SoIndNurbs *this, const char *name)
SbName SoIndNurbsGetName(const SoIndNurbs *this)
DESCRIPTION
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.
Page 2SoIndexedNurbsSurface(3IV)
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.
FIELDS
SoSFInt32 numUControlPoints
SoSFInt32 numVControlPoints
Number of control points in the U and V directions.
SoMFInt32 coordIndex
Coordinate indices.
SoMFFloat uKnotVector
SoMFFloat vKnotVector
The knot vectors in the U and V directions.
SoSFInt32 numSControlPoints
SoSFInt32 numTControlPoints
Number of control points in the S and T directions.
SoMFInt32 textureCoordIndex
Texture coordinate indices.
SoMFFloat sKnotVector
SoMFFloat tKnotVector
The knot vectors in the S and T directions.
FUNCTIONSSoIndexedNurbsSurface * SoIndNurbsCreate()
Creates an indexed NURBS surface node with default settings.
SoType SoIndNurbsGetClassTypeId()
Returns type identifier for this class.
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.
Page 3SoIndexedNurbsSurface(3IV)
SoCallbackAction
If any triangle callbacks are registered with the action, they will
be invoked for each successive triangle approximating the surface.
FILE FORMAT/DEFAULTS
IndexedNurbsSurface {
numUControlPoints 0
numVControlPoints 0
numSControlPoints 0
numTControlPoints 0
coordIndex 0
uKnotVector 0
vKnotVector 0
sKnotVector 0
tKnotVector 0
textureCoordIndex -1
}
SEE ALSO
SoIndexedNurbsCurve, SoNurbsSurface, SoProfile
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