Open Inventor Release 2024.1.2
 
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SoTriangleSet Class Reference

Set of triangles shape node. More...

#include <Inventor/nodes/SoTriangleSet.h>

+ Inheritance diagram for SoTriangleSet:

Public Member Functions

virtual SoType getTypeId () const
 Returns the type identifier for this specific instance.
 
 SoTriangleSet ()
 Creates a triangle set node with default settings.
 
- Public Member Functions inherited from SoVertexShape
SoNormalCache * getNormalCache () const
 Returns the current normal cache, or NULL if there is none.
 
SoTangentCache * getTangentCache () const
 Returns the current tangent cache, or NULL if there is none.
 
- Public Member Functions inherited from SoShape
virtual SbBool affectsState () const
 Overrides default method on SoNode.
 
ShapeType getShapeType ()
 Gets the current shape Full Scene Antialiasing type.
 
- Public Member Functions inherited from SoNode
virtual void setOverride (const SbBool state)
 Turns the override flag on or off.
 
virtual SbBool isOverride () const
 Returns the state of the override flag.
 
virtual SoNodecopy (SbBool copyConnections=FALSE) const
 Creates and returns an exact copy of the node.
 
virtual void touch ()
 Marks an instance as modified, simulating a change to it.
 
- Public Member Functions inherited from SoFieldContainer
void setToDefaults ()
 Sets all fields in this object to their default values.
 
SbBool hasDefaultValues () const
 Returns TRUE if all of the object's fields have their default values.
 
SbBool fieldsAreEqual (const SoFieldContainer *fc) const
 Returns TRUE if this object's fields are exactly equal to fc's fields.
 
void copyFieldValues (const SoFieldContainer *fc, SbBool copyConnections=FALSE)
 Copies the contents of fc's fields into this object's fields.
 
SoNONUNICODE SbBool set (const char *fieldDataString)
 Sets one or more fields in this object to the values specified in the given string, which should be a string in the Open Inventor file format.
 
SbBool set (const SbString &fieldDataString)
 Sets one or more fields in this object to the values specified in the given string, which should be a string in the Open Inventor file format.
 
void get (SbString &fieldDataString)
 Returns the values of the fields of this object in the Open Inventor ASCII file format in the given string.
 
virtual int getFields (SoFieldList &list) const
 Appends references to all of this object's fields to resultList, and returns the number of fields appended.
 
virtual int getAllFields (SoFieldList &list) const
 Returns a list of fields, including the eventIn's and eventOut's.
 
virtual SoFieldgetField (const SbName &fieldName) const
 Returns a the field of this object whose name is fieldName.
 
virtual SoFieldgetEventIn (const SbName &fieldName) const
 Returns a the eventIn with the given name.
 
virtual SoFieldgetEventOut (const SbName &fieldName) const
 Returns the eventOut with the given name.
 
SbBool getFieldName (const SoField *field, SbName &fieldName) const
 Returns the name of the given field in the fieldName argument.
 
SbBool enableNotify (SbBool flag)
 Notification at this Field Container is enabled (if flag == TRUE) or disabled (if flag == FALSE).
 
SbBool isNotifyEnabled () const
 Notification is the process of telling interested objects that this object has changed.
 
virtual void setUserData (void *data)
 Sets application data.
 
void * getUserData (void) const
 Gets user application data.
 
- Public Member Functions inherited from SoBase
virtual SbName getName () const
 Returns the name of an instance.
 
virtual void setName (const SbName &name)
 Sets the name of an instance.
 
void setSynchronizable (const bool b)
 Sets this to be a ScaleViz synchronizable object.
 
bool isSynchronizable () const
 Gets the ScaleViz synchronizable state of this object.
 
- Public Member Functions inherited from SoRefCounter
void ref () const
 Adds a reference to an instance.
 
void unref () const
 Removes a reference from an instance.
 
void unrefNoDelete () const
 unrefNoDelete() should be called when it is desired to decrement the reference count, but not delete the instance if this brings the reference count to zero.
 
int getRefCount () const
 Returns current reference count.
 
void lock () const
 lock this instance.
 
void unlock () const
 unlock this instance.
 
- Public Member Functions inherited from SoTypedObject
SbBool isOfType (const SoType &type) const
 Returns TRUE if this object is of the type specified in type or is derived from that type.
 
template<typename TypedObjectClass >
SbBool isOfType () const
 Returns TRUE if this object is of the type of class TypedObjectClass or is derived from that class.
 

Static Public Member Functions

static SoType getClassTypeId ()
 Returns the type identifier for this class.
 
- Static Public Member Functions inherited from SoNonIndexedShape
static SoType getClassTypeId ()
 Returns the type identifier for this class.
 
- Static Public Member Functions inherited from SoVertexShape
static SoType getClassTypeId ()
 Returns the type identifier for this class.
 
- Static Public Member Functions inherited from SoShape
static SoType getClassTypeId ()
 Returns the type identifier for this class.
 
static SbBool isPrimitiveRestartAvailable (SoState *state=NULL)
 Returns TRUE if the primitive restart feature is available.
 
- Static Public Member Functions inherited from SoNode
static SoType getClassTypeId ()
 Returns the type identifier for this class.
 
static SoNodegetByName (const SbName &name)
 A node's name can be set using SoBase::setName().
 
static int getByName (const SbName &name, SoNodeList &list)
 A node's name can be set using SoBase::setName().
 
- Static Public Member Functions inherited from SoFieldContainer
static SoType getClassTypeId ()
 Returns the type of this class.
 
- Static Public Member Functions inherited from SoBase
static SoType getClassTypeId ()
 Returns type identifier for this class.
 
- Static Public Member Functions inherited from SoTypedObject
static SoType getClassTypeId ()
 Returns the type identifier for this class.
 

Public Attributes

SoSFInt32 numTriangles
 Number of triangles in the set.
 
- Public Attributes inherited from SoNonIndexedShape
SoSFInt32 startIndex
 Index of first coordinate of shape.
 
- Public Attributes inherited from SoVertexShape
SoSFNode vertexProperty
 vertex property node.
 
- Public Attributes inherited from SoShape
SoSFBool boundingBoxIgnoring
 Whether to ignore this node during bounding box traversal.
 

Friends

class SoVolumeTriangleSetDl
 

Additional Inherited Members

- Public Types inherited from SoShape
enum  ShapeType {
  POINTS ,
  LINES ,
  POLYGONS ,
  TEXT
}
 Basic type for antialiased rendering for this shape (Do not consider the SoDrawStyle property currently in the state). More...
 

Detailed Description

Set of triangles shape node.

This node represents a 3D shape defined by a set of triangles.

This shape node constructs triangles from the vertices located at the coordinates specified in the vertexProperty field (from SoVertexShape), or the current inherited state. For optimal performance, the vertexProperty field is recommended.

Each triangle is defined by three vertices, starting at startIndex. The numTriangles field specifies the number of triangles in the set. If numTriangles is -1 (default), then all vertices are used and the number of triangles is the number of vertices divided by three. Setting numTriangles to zero means there are no triangles in the set (the bounding box is empty). An error message is generated in the debug build if there are not enough vertices to make the specified number of triangles.

The coordinates of the triangle set are transformed by the current cumulative transformation. The triangles are drawn with the current light model and drawing style.

Treatment of the current material and normal binding is as follows: The PER_PART and PER_FACE bindings specify a material or normal for each triangle. The _INDEXED bindings are equivalent to their non-indexed counterparts. The default material binding is OVERALL. The default normal binding is PER_VERTEX.

If any normals (or materials) are specified, Open Inventor assumes you provide the correct number of them, as indicated by the binding. You will see unexpected results if you specify fewer normals (or materials) than the shape requires. If no normals are specified, they will be generated automatically.

Limitations:

  • Due to limitations of the OpenGL VBO (vertex buffer object) rendering model, it is not possible to use VBO rendering (and performance may be lower) if either the normal binding or the material binding is set to either PER_PART(_INDEXED) or PER_FACE(_INDEXED).

NOTE: node available since Open Inventor 8.6

FILE FORMAT/DEFAULT

    TriangleSet {
    vertexProperty NULL
    startIndex 0
    numTriangles -1
    }

ACTION BEHAVIOR

    SoGLRenderAction
    Draws triangles based on the current coordinates, normals, materials, drawing style, and so on.

    SoRayPickAction
    Picks triangles based on the current coordinates and transformation. Details about the intersection are returned in an SoFaceDetail.

    SoGetBoundingBoxAction
    Computes the bounding box that encloses all vertices of the triangle set with the current transformation applied to them. Sets the center to the average of the coordinates of all vertices.

    SoCallbackAction
    If any triangle callbacks are registered with the action, they will be invoked for each successive triangle generated from each triangle in the set.

SEE ALSO

SoCoordinate3, SoDrawStyle, SoIndexedTriangleSet, SoFaceDetail, SoFullSceneAntialiasing, SoVertexProperty, SoShapeHints

Definition at line 122 of file SoTriangleSet.h.

Constructor & Destructor Documentation

◆ SoTriangleSet()

SoTriangleSet::SoTriangleSet ( )

Creates a triangle set node with default settings.

Member Function Documentation

◆ getClassTypeId()

static SoType SoTriangleSet::getClassTypeId ( )
static

Returns the type identifier for this class.


◆ getTypeId()

virtual SoType SoTriangleSet::getTypeId ( ) const
virtual

Returns the type identifier for this specific instance.

Reimplemented from SoNonIndexedShape.

Friends And Related Symbol Documentation

◆ SoVolumeTriangleSetDl

friend class SoVolumeTriangleSetDl
friend

Definition at line 212 of file SoTriangleSet.h.

Member Data Documentation

◆ numTriangles

SoSFInt32 SoTriangleSet::numTriangles

Number of triangles in the set.

Default is SO_TRIANGLE_SET_USE_REST_OF_VERTICES, meaning to use all the vertices given, so the number of triangles is number of vertices divided by 3.

Definition at line 134 of file SoTriangleSet.h.


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