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SoTriangleStripSet Class Reference
Nodes

Triangle strip set shape node. More...

#include <Inventor/nodes/SoTriangleStripSet.h>

Inheritance diagram for SoTriangleStripSet:
SoNonIndexedShape SoVertexShape SoShape SoNode SoFieldContainer SoBase

List of all members.

Public Types

typedef void(SoTriangleStripSet::* PMTSS )(SoGLRenderAction *)
 Typedef of pointer to method on TriangleStripSet; This will be used to simplify declaration and initialization.

Public Member Functions

 SoTriangleStripSet ()
 Creates a triangle strip set node with default settings.
virtual void GLRender (SoGLRenderAction *action)
 Implement actions.
virtual SbBool generateDefaultNormals (SoState *state, SoNormalBundle *nb)
 Generates default normals using the given normal bundle.

Static Public Member Functions

static void initClass ()
 Initializes base node class.

Public Attributes

Fields
SoMFInt32 numVertices
 Number of vertices in each triangle strip.

Protected Member Functions

virtual void generatePrimitives (SoAction *action)
 Generates triangles representing strips.
virtual void computeBBox (SoAction *action, SbBox3f &box, SbVec3f &center)
 Computes bounding box of triangle strips.
virtual SoDetail * createTriangleDetail (SoRayPickAction *action, const SoPrimitiveVertex *v1, const SoPrimitiveVertex *v2, const SoPrimitiveVertex *v3, SoPickedPoint *pp)
 Overrides standard method to create an SoFaceDetail instance.
virtual ~SoTriangleStripSet ()

Detailed Description

This shape node constructs triangle strips out of vertices. The vertices may be specified in the vertexProperty field (from SoVertexShape), or by the current inherited coordinates. For optimal performance, the vertexProperty field is recommended.

SoTriangleStripSet is one of the fastest ways of drawing polygonal objects in Inventor. It uses the current coordinates, in order, starting with the first one. The values in the numVertices field indicate the number of vertices to use for each triangle strip in the set. The number of values in this field determines the number of strips.

For example, if numVertices has the values [3,5], coordinates 1, 2, and 3 would be used for the first triangle strip and coordinates 4, 5, 6, 7, and 8 would be used for the second strip. This would result in 1 triangle in the first strip and 3 in the second.

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

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

If any normals (or materials) are specified, 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.

File Format/Default
TriangleStripSet {
  startIndex 0
  numVertices -1
}
Action Behavior
SoGLRenderAction
Draws a strip set based on the current coordinates, normals, materials, drawing style, and so on.
SoRayPickAction
Picks on the strip set 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 strip 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 forming the strips of the set.
See Also
SoCoordinate3, SoDrawStyle, SoFaceDetail, SoFaceSet, SoIndexedTriangleStripSet, SoQuadMesh, SoVertexProperty

Definition at line 150 of file SoTriangleStripSet.h.

Member Typedef Documentation

typedef void(SoTriangleStripSet::* SoTriangleStripSet::PMTSS)(SoGLRenderAction *)

Definition at line 181 of file SoTriangleStripSet.h.

Constructor & Destructor Documentation

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

Member Function Documentation

virtual void SoTriangleStripSet::computeBBox ( SoAction *  action,
SbBox3f &  box,
SbVec3f &  center 
) [protected, virtual]

Implements SoShape.

virtual SoDetail* SoTriangleStripSet::createTriangleDetail ( SoRayPickAction *  action,
const SoPrimitiveVertex *  v1,
const SoPrimitiveVertex *  v2,
const SoPrimitiveVertex *  v3,
SoPickedPoint *  pp 
) [protected, virtual]

Reimplemented from SoShape.

virtual SbBool SoTriangleStripSet::generateDefaultNormals ( SoState *  state,
SoNormalBundle *  nb 
) [virtual]

Returns TRUE.

Reimplemented from SoVertexShape.

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

Implements SoShape.

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

Reimplemented from SoShape.

static void SoTriangleStripSet::initClass ( ) [static]

Reimplemented from SoNonIndexedShape.

Member Data Documentation

SoMFInt32 SoTriangleStripSet::numVertices

The number of strips is equal to the number of values in this field.

Definition at line 160 of file SoTriangleStripSet.h.

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