SoIndexedNurbsSurface(3IV)
SoIndexedNurbsSurface (SoIndNurbs) - indexed NURBS surface shape node
As shipped in IRIX 6.5.30. Added in IRIX 6.5.22.
NAME SoIndexedNurbsSurface (SoIndNurbs) - indexed NURBS surface shape node INHERITS FROM SoBase > SoFieldContainer > SoNode > SoShape > SoIndexedNurbsSurface SYNOPSIS #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) 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. 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. FUNCTIONS SoIndexedNurbsSurface * 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. 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