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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. More...
#include <Inventor/nodes/SoIndexedNurbsSurface.h>
Public Member Functions | |
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 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 | ~SoIndexedNurbsSurface () |
virtual void | generatePrimitives (SoAction *action) |
virtual void | computeBBox (SoAction *action, SbBox3f &box, SbVec3f ¢er) |
SoDetail * | createTriangleDetail (SoRayPickAction *action, const SoPrimitiveVertex *v1, const SoPrimitiveVertex *v2, const SoPrimitiveVertex *v3, SoPickedPoint *pp) |
Friends | |
class | SoIndexedNurbsSurfaceP |
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 }
SoIndexedNurbsSurface::SoIndexedNurbsSurface | ( | void | ) |
Constructor.
References coordIndex, numSControlPoints, numTControlPoints, numUControlPoints, numVControlPoints, sKnotVector, textureCoordIndex, tKnotVector, uKnotVector, and vKnotVector.
SoIndexedNurbsSurface::~SoIndexedNurbsSurface | ( | ) | [protected, virtual] |
Destructor.
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.
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.
References SoAction::getState(), and SoShape::shouldGLRender().
void SoIndexedNurbsSurface::rayPick | ( | SoRayPickAction * | action | ) | [virtual] |
Calculates picked point based on primitives generated by subclasses.
Reimplemented from SoShape.
References SoAction::getState(), SoState::pop(), SoDebugError::postWarning(), SoState::push(), SoFieldContainer::set(), and SoShape::shouldRayPick().
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.
References coordIndex, SbBox3f::extendBy(), SoMField::getNum(), SbVec4f::getReal(), SoAction::getState(), SoMFInt32::getValues(), and SbBox3f::makeEmpty().
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.
Number of control points in the U direction.
Referenced by SoIndexedNurbsSurface().
Number of control points in the V direction.
Referenced by SoIndexedNurbsSurface().
The coordinate control point indices.
Referenced by computeBBox(), and SoIndexedNurbsSurface().
The Bezier knot vector for the U direction.
Referenced by SoIndexedNurbsSurface().
The Bezier knot vector for the V direction.
Referenced by SoIndexedNurbsSurface().
Number of control points in the S direction.
Referenced by SoIndexedNurbsSurface().
Number of control points in the T direction.
Referenced by SoIndexedNurbsSurface().
The texture coordinate control point indices.
Referenced by SoIndexedNurbsSurface().
The Bezier knot vector for the S direction.
Referenced by SoIndexedNurbsSurface().
The Bezier knot vector for the T direction.
Referenced by SoIndexedNurbsSurface().
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