soindexednurbssurface(3)

NAME

SoIndexedNurbsSurface

SYNOPSIS

#include <Inventor/nodes/SoIndexedNurbsSurface.h>
Inherits SoShape.

Detailed Description

The SoIndexedNurbsSurface class can be used to render NURBS surfaces.

It is very similar to the SoNurbsSurface class, but controlpoints can be specified using indices.

FILE FORMAT/DEFAULTS:

IndexedNurbsSurface {

numUControlPoints 0
numVControlPoints 0
coordIndex 0
uKnotVector 0
vKnotVector 0
numSControlPoints 0
numTControlPoints 0
textureCoordIndex -1
sKnotVector 0
tKnotVector 0

}

Public Member Functions

virtual SoType getTypeId (void) const
SoIndexedNurbsSurface (void) virtual void GLRender (SoGLRenderAction *action) virtual void rayPick (SoRayPickAction *action) virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action) void sendPrimitive (SoAction *, SoPrimitiveVertex *)

Static Public Member Functions

static SoType getClassTypeId (void) static void initClass (void)

Public Attributes

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

Protected Member Functions

virtual const SoFieldData * getFieldData (void) const virtual ~SoIndexedNurbsSurface () virtual void generatePrimitives (SoAction *action) virtual void computeBBox (SoAction *action, SbBox3f &box, SbVec3f

&center)

SoDetail * createTriangleDetail (SoRayPickAction *action, const

SoPrimitiveVertex *v1, const SoPrimitiveVertex *v2, const SoPrimitiveVertex *v3, SoPickedPoint *pp)

Static Protected Member Functions

static const SoFieldData ** getFieldDataPtr (void)

Friends

class SoIndexedNurbsSurfaceP

Constructor & Destructor Documentation

SoIndexedNurbsSurface::SoIndexedNurbsSurface (void)

Constructor.

SoIndexedNurbsSurface::~SoIndexedNurbsSurface () [protected, virtual]

Destructor.

Member Function Documentation

SoType SoIndexedNurbsSurface::getClassTypeId (void) [static]

This static method returns the SoType object associated with objects of this class.

Reimplemented from SoShape.

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

Returns the type identification of an object derived from a class
inheriting SoBase. This is used for run-time type checking and 'downward' casting.

Usage example:

void foo(SoNode * node)
{

if (node->getTypeId() == SoFile::getClassTypeId()) {

SoFile * filenode = (SoFile *)node; // safe downward cast, knows the type

}
else if (node->getTypeId().isOfType(SoGroup::getClassTypeId())) {

SoGroup * group = (SoGroup *)node; // safe downward cast, knows the type

}

}

For application programmers wanting to extend the library with new
nodes, engines, nodekits, draggers or others: this method needs to be
overridden in all subclasses. This is typically done as part of setting up the full type system for extension classes, which is usually
accomplished by using the pre-defined macros available through for
instance Inventor/nodes/SoSubNode.h (SO_NODE_INIT_CLASS and
SO_NODE_CONSTRUCTOR for node classes), Inventor/engines/SoSubEngine.h (for engine classes) and so on.

For more information on writing Coin extensions, see the class
documentation of the toplevel superclasses for the various class
groups.

Reimplemented from SoShape.

const SoFieldData ** SoIndexedNurbsSurface::getFieldDataPtr (void) [static,

protected]
This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

Reimplemented from SoShape.

const SoFieldData * SoIndexedNurbsSurface::getFieldData (void) const

[protected, virtual]
Returns a pointer to the class-wide field data storage object for this instance. If no fields are present, returns NULL.

Reimplemented from SoShape.

void SoIndexedNurbsSurface::initClass (void) [static]

Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.

Reimplemented from SoShape.

Referenced by SoNode::initClasses().

void SoIndexedNurbsSurface::GLRender (SoGLRenderAction * action) [virtual]

Action method for the SoGLRenderAction.

This is called during rendering traversals. Nodes influencing the
rendering state in any way or who wants to throw geometry primitives at OpenGL overrides this method.

Reimplemented from SoShape.

void SoIndexedNurbsSurface::rayPick (SoRayPickAction * action) [virtual]

Calculates picked point based on primitives generated by subclasses.

Reimplemented from SoShape.

References SoDebugError::postWarning().

void SoIndexedNurbsSurface::getPrimitiveCount (SoGetPrimitiveCountAction *

action) [virtual]
Action method for the SoGetPrimitiveCountAction.

Calculates the number of triangle, line segment and point primitives
for the node and adds these to the counters of the action.

Nodes influencing how geometry nodes calculates their primitive count
also overrides this method to change the relevant state variables.

Reimplemented from SoShape.

void SoIndexedNurbsSurface::sendPrimitive (SoAction *, SoPrimitiveVertex *)

This method is part of the original SGI Inventor API, but not
implemented in Coin, as it looks like a method that should probably
have been private in Open Inventor.

void SoIndexedNurbsSurface::generatePrimitives (SoAction * action)

[protected, virtual]
The method implements action behavior for shape nodes for
SoCallbackAction. It is invoked from SoShape::callback(). (Subclasses should not override SoNode::callback().)

The subclass implementations uses the convenience methods
SoShape::beginShape(), SoShape::shapeVertex(), and SoShape::endShape(), with SoDetail instances, to pass the primitives making up the shape back to the caller.

Implements SoShape.

void SoIndexedNurbsSurface::computeBBox (SoAction * action, SbBox3f & box,

SbVec3f & center) [protected, virtual] Calculates the bounding box of all control points and sets the center
to the average of these points.

Implements SoShape.

SoDetail * SoIndexedNurbsSurface::createTriangleDetail (SoRayPickAction *

action, const SoPrimitiveVertex * v1, const SoPrimitiveVertex * v2, const SoPrimitiveVertex * v3, SoPickedPoint * pp) [protected, virtual] Will create triangle detail for a SoPickedPoint. This method will only be called internally, when generatePrimitives() is used for picking (SoShape::rayPick() is not overridden).

This method returns NULL in Open Inventor, and subclasses will need to override this method to create details for a SoPickedPoint.

This is not necessary with Coin. Of course, if you choose to override
it, it will work in the same way as Open Inventor.

For this to work, you must supply a face or line detail when generating primitives. If you supply NULL for the detail argument in
SoShape::beginShape(), you'll have to override this method.

Reimplemented from SoShape.

Member Data Documentation

SoSFInt32 SoIndexedNurbsSurface::numUControlPoints

Number of control points in the U direction.

SoSFInt32 SoIndexedNurbsSurface::numVControlPoints

Number of control points in the V direction.

SoMFInt32 SoIndexedNurbsSurface::coordIndex

The coordinate control point indices.

SoMFFloat SoIndexedNurbsSurface::uKnotVector

The Bezier knot vector for the U direction.

SoMFFloat SoIndexedNurbsSurface::vKnotVector

The Bezier knot vector for the V direction.

SoSFInt32 SoIndexedNurbsSurface::numSControlPoints

Number of control points in the S direction.

SoSFInt32 SoIndexedNurbsSurface::numTControlPoints

Number of control points in the T direction.

SoMFInt32 SoIndexedNurbsSurface::textureCoordIndex

The texture coordinate control point indices.

SoMFFloat SoIndexedNurbsSurface::sKnotVector

The Bezier knot vector for the S direction.

SoMFFloat SoIndexedNurbsSurface::tKnotVector

The Bezier knot vector for the T direction.

Author

Generated automatically by Doxygen for Coin from the source code.

Version 2.5.0 28 Jun 2008 SoIndexedNurbsSurface(3)