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SoIndexedTriangleStripSet Class Reference
[Nodes]

The SoIndexedTriangleStripSet class keeps data for rendering and otherwise representing triangle strips.

Use nodes of this type as an effective way of drawing triangles which are strung together. More...

#include <Inventor/nodes/SoIndexedTriangleStripSet.h>

Inheritance diagram for SoIndexedTriangleStripSet:

SoIndexedShape SoVertexShape SoShape SoNode SoFieldContainer SoBase

List of all members.

Public Member Functions

virtual SoType getTypeId (void) const
 SoIndexedTriangleStripSet (void)
virtual void GLRender (SoGLRenderAction *action)
virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)
virtual SbBool generateDefaultNormals (SoState *state, SoNormalBundle *nb)

Static Public Member Functions

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

Protected Member Functions

virtual const SoFieldDatagetFieldData (void) const
virtual ~SoIndexedTriangleStripSet ()
virtual SbBool generateDefaultNormals (SoState *state, SoNormalCache *nc)
virtual void generatePrimitives (SoAction *action)

Static Protected Member Functions

static const SoFieldData ** getFieldDataPtr (void)


Detailed Description

The SoIndexedTriangleStripSet class keeps data for rendering and otherwise representing triangle strips.

Use nodes of this type as an effective way of drawing triangles which are strung together.

For more information, see the documentation of the SoTriangleStripSet node.

To render several strips within the same node, just separate the coordinate indices with -1. For more information about indexed shapes, see documentation in SoIndexedShape and SoIndexedFaceSet.

Example scene graph:

  #Inventor V2.1 ascii
  
  Separator {
     Coordinate3 {
        point [
         -2 1 0, -1 -1 0, 0 1 0, 1 -1 0, 2 1 0, # first strip, z==0
         -2 1 5, -1 -1 5, 0 1 5, 1 -1 5, 2 1 5  # second strip, z==5
        ]
     }
  
     IndexedTriangleStripSet {
        coordIndex [
         0, 1, 2, 3, 4, -1,
         5, 6, 7, 8, 9, -1
        ]
     }
  }
  

FILE FORMAT/DEFAULTS:

    IndexedTriangleStripSet {
        vertexProperty NULL
        coordIndex 0
        materialIndex -1
        normalIndex -1
        textureCoordIndex -1
    }

Constructor & Destructor Documentation

SoIndexedTriangleStripSet::SoIndexedTriangleStripSet ( void   ) 

Constructor. Default field values will equal those set in the SoIndexedShape parent class.

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

Destructor.


Member Function Documentation

SoType SoIndexedTriangleStripSet::getClassTypeId ( void   )  [static]

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

Reimplemented from SoIndexedShape.

SoType SoIndexedTriangleStripSet::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 SoIndexedShape.

const SoFieldData ** SoIndexedTriangleStripSet::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 SoIndexedShape.

const SoFieldData * SoIndexedTriangleStripSet::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 SoIndexedShape.

void SoIndexedTriangleStripSet::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 SoIndexedShape.

void SoIndexedTriangleStripSet::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 SoIndexedShape::coordIndex, SoMField::getNum(), SoAction::getState(), SoSFNode::getValue(), SoIndexedShape::getVertexData(), SoNode::GLRender(), SoState::pop(), SoState::push(), SoVertexShape::readUnlockNormalCache(), SoVertexShape::shouldGLRender(), and SoVertexShape::vertexProperty.

void SoIndexedTriangleStripSet::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.

References SoGetPrimitiveCountAction::addNumTriangles(), SoGetPrimitiveCountAction::canApproximateCount(), SoIndexedShape::coordIndex, SoMField::getNum(), and SoShape::shouldPrimitiveCount().

SbBool SoIndexedTriangleStripSet::generateDefaultNormals ( SoState state,
SoNormalBundle *  bundle 
) [virtual]

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

Subclasses should override this method to generate default normals using the SoNormalBundle class. TRUE should be returned if normals were generated, FALSE otherwise.

Default method returns FALSE.

This function is an extension for Coin, and it is not available in the original SGI Open Inventor v2.1 API.

Reimplemented from SoVertexShape.

SbBool SoIndexedTriangleStripSet::generateDefaultNormals ( SoState state,
SoNormalCache *  cache 
) [protected, virtual]

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

Subclasses should override this method to generate default normals using the SoNormalCache class. This is more effective than using SoNormalGenerator. Return TRUE if normals were generated, FALSE otherwise.

Default method just returns FALSE.

This function is an extension for Coin, and it is not available in the original SGI Open Inventor v2.1 API.

Reimplemented from SoVertexShape.

References SoIndexedShape::coordIndex, SoFieldContainer::get(), SoVertexProperty::getClassTypeId(), SoMField::getNum(), SoSFEnum::getValue(), SoSFNode::getValue(), SoMFInt32::getValues(), SoMFVec3f::getValues(), SoBase::isOfType(), SoVertexProperty::normal, SoVertexProperty::normalBinding, SoVertexProperty::vertex, and SoVertexShape::vertexProperty.

void SoIndexedTriangleStripSet::generatePrimitives ( SoAction action  )  [protected, virtual]


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

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