InterleavedArraysShape Class Reference

The InterleavedArraysShape class is used to render static geometry very fast. More...

#include <SmallChange/nodes/InterleavedArraysShape.h>

Inheritance diagram for InterleavedArraysShape:

Public Types
enum	Type { POINTS , LINES , TRIANGLES , QUADS , TRIANGLE_STRIP , QUAD_STRIP }

Public Member Functions
	InterleavedArraysShape (void)
virtual void	getPrimitiveCount (SoGetPrimitiveCountAction *action)
virtual void	GLRender (SoGLRenderAction *action)
virtual void	rayPick (SoRayPickAction *action)

Static Public Member Functions
static void	initClass (void)

Public Attributes
SoSFEnum	type
SoMFInt32	vertexIndex

Protected Member Functions
virtual	~InterleavedArraysShape ()
virtual void	computeBBox (SoAction *action, SbBox3f &box, SbVec3f &center)
virtual void	generatePrimitives (SoAction *action)
virtual void	notify (SoNotList *nl)

Detailed Description

The InterleavedArraysShape class is used to render static geometry very fast.

It creates a VBO (vertex buffer object) vertex cache internally, and all vertex data will be interleaved for maximum rendering performance. If you change one vertex attribute, for instance the normals, the entire cache needs to be rebuilt, and this is why this shape is best suited for relatively static geometry.

To achieve this caching and reduce overhead, it will only render the contents of its SoVertexShape::vertexProperty node, it will not pick up any vertex properties from the state.

This shape only supports OVERALL and PER_VERTEX[_INDEXED] material/normal bindings. If some binding is set to something other than OVERALL, it will be interpreted as PER_VERTEX[_INDEXED], if the SoVertexProperty node contains sufficient data to render that attribute per vertex.

Member Enumeration Documentation

Type

enum InterleavedArraysShape::Type

The type of primitives supported by this shape.

Enumerator
POINTS	For rendering points.
LINES	For rendering lines.
TRIANGLES	For rendering triangles.
QUADS	For rendering quads.

Constructor & Destructor Documentation

InterleavedArraysShape()

InterleavedArraysShape::InterleavedArraysShape

(

void

)

Constructor.

~InterleavedArraysShape()

InterleavedArraysShape::~InterleavedArraysShape ( )

protectedvirtual

Destructor.

Member Function Documentation

initClass()

void InterleavedArraysShape::initClass ( void )

static

Required Coin method.

Member Data Documentation

type

SoSFEnum InterleavedArraysShape::type

The type of geometry to render.

vertexIndex

SoMFInt32 InterleavedArraysShape::vertexIndex

Optional field for specifying vertex indices. If this field is empty, the shape will render all vertices in its SoVertexProperty node (using glDrawArrays()).

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

• InterleavedArraysShape.h
• InterleavedArraysShape.cpp