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SoVertexProperty.3coin2

NAME

SoVertexProperty -

The SoVertexProperty class collects the functionality of various appearance nodes.

Instead of reading data from the current state stack of the scenegraph traversal, nodes inheriting SoVertexShape can be set up with an SoVertexProperty node in the SoVertexShape::vertexProperty field. Coordinates, normals, texture coordinates and material / color information will then be fetched from the vertexshape's SoVertexProperty node instead of from the state stack.

SYNOPSIS

#include <Inventor/nodes/SoVertexProperty.h>

Inherits SoNode.

Public Types

enum Binding { OVERALL = 2, PER_PART, PER_PART_INDEXED, PER_FACE, PER_FACE_INDEXED, PER_VERTEX, PER_VERTEX_INDEXED }

Public Member Functions

SoVertexProperty (void)

virtual void doAction (SoAction *action)

virtual void GLRender (SoGLRenderAction *action)

virtual void getBoundingBox (SoGetBoundingBoxAction *action)

virtual void callback (SoCallbackAction *action)

virtual void pick (SoPickAction *action)

virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)

Static Public Member Functions

static void initClass (void)

Public Attributes

SoMFVec3f vertex

SoMFVec2f texCoord

SoMFVec3f texCoord3

SoMFVec3f normal

SoSFEnum normalBinding

SoMFUInt32 orderedRGBA

SoSFEnum materialBinding

Protected Member Functions

virtual ~SoVertexProperty ()

virtual void notify (SoNotList *list)

Detailed Description

The SoVertexProperty class collects the functionality of various appearance nodes.

Instead of reading data from the current state stack of the scenegraph traversal, nodes inheriting SoVertexShape can be set up with an SoVertexProperty node in the SoVertexShape::vertexProperty field. Coordinates, normals, texture coordinates and material / color information will then be fetched from the vertexshape's SoVertexProperty node instead of from the state stack.

The SoVertexProperty node provides fields for duplicating the functionality of all these other Inventor node types: SoCoordinate3, SoTextureCoordinate2, SoTextureCoordinate3, SoNormal, SoPackedColor, SoMaterialBinding and SoNormalBinding.

The SoVertexProperty node was introduced fairly late in the design of the Inventor API by SGI. The idea behind it was to provide a means to specify the necessary data for vertexshape-derived nodes which would be more efficient to work with than fetching the data from the traversal state stack.

In practice, the effect is not at all very noticable. Since the use of SoVertexProperty nodes in the SoVertexShape::vertexProperty field somewhat breaks with the basic design of the Open Inventor API (the SoVertexProperty data is not pushed to the traversal state stack), you might be better off design-wise by using the usual mechanisms, ie by setting up the individual nodes SoVertexProperty 'collects'.

One of the drawbacks will for instance be that it's not possible to share parts of the SoVertexProperty node between several shapes, which is something that can easily be done when setting up individual state-changing nodes in the scenegraph.

FILE FORMAT/DEFAULTS:

     VertexProperty {
         vertex [  ]
         normal [  ]
         texCoord [  ]
         orderedRGBA [  ]
         texCoord3 [  ]
         normalBinding PER_VERTEX_INDEXED
         materialBinding OVERALL
     }
 
 

Since:

Inventor 2.1

See also:

SoVertexShape
SoCoordinate3, SoTextureCoordinate2, SoTextureCoordinate3, SoNormal
SoPackedColor
SoMaterialBinding, SoNormalBinding

Member Enumeration Documentation

enum SoVertexProperty::BindingThe binding types available for our SoVertexProperty::normalBinding and SoVertexProperty::materialBinding fields.

For a detailed explanation of each of the enumeration value binding types, see the documentation of the SoMaterialBinding node.

Constructor & Destructor Documentation

SoVertexProperty::SoVertexProperty (void)Constructor.

References materialBinding, normal, normalBinding, orderedRGBA, SoField::setDefault(), SoMField::setNum(), texCoord, texCoord3, and vertex.

SoVertexProperty::~SoVertexProperty () [protected, virtual]Destructor.

Member Function Documentation

void SoVertexProperty::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 SoNode.

void SoVertexProperty::doAction (SoAction * action) [virtual]This function performs the typical operation of a node for any action.

Reimplemented from SoNode.

References SoAction::getClassTypeId(), SoNode::getNodeId(), SoMField::getNum(), SoAction::getState(), SoMFUInt32::getValues(), SoMFVec2f::getValues(), SoMFVec3f::getValues(), SoAction::isOfType(), SoNode::isOverride(), materialBinding, normal, normalBinding, orderedRGBA, SoFieldContainer::set(), SoOverrideElement::setDiffuseColorOverride(), SoOverrideElement::setMaterialBindingOverride(), SoOverrideElement::setNormalBindingOverride(), SoOverrideElement::setNormalVectorOverride(), SoBase::staticDataLock(), SoBase::staticDataUnlock(), texCoord, texCoord3, and vertex.

Referenced by callback(), getPrimitiveCount(), GLRender(), SoShape::GLRender(), and pick().

void SoVertexProperty::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 SoNode.

References doAction().

void SoVertexProperty::getBoundingBox (SoGetBoundingBoxAction * action) [virtual]Action method for the SoGetBoundingBoxAction.

Calculates bounding box and center coordinates for node and modifies the values of the action to encompass the bounding box for this node and to shift the center point for the scene more towards the one for this node.

Nodes influencing how geometry nodes calculates their bounding box also overrides this method to change the relevant state variables.

Reimplemented from SoNode.

References SoMField::getNum(), SoAction::getState(), SoMFVec3f::getValues(), and vertex.

void SoVertexProperty::callback (SoCallbackAction * action) [virtual]Action method for SoCallbackAction.

Simply updates the state according to how the node behaves for the render action, so the application programmer can use the SoCallbackAction for extracting information about the scene graph.

Reimplemented from SoNode.

References doAction().

void SoVertexProperty::pick (SoPickAction * action) [virtual]Action method for SoPickAction.

Does common processing for SoPickAction action instances.

Reimplemented from SoNode.

References doAction().

void SoVertexProperty::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 SoNode.

References doAction().

void SoVertexProperty::notify (SoNotList * l) [protected, virtual]Notifies all auditors for this instance when changes are made.

Reimplemented from SoNode.

References SoNotList::getLastField(), SoNode::notify(), and orderedRGBA.

Member Data Documentation

SoMFVec3f SoVertexProperty::vertexThis field sets up vertex coordinates in the same manner as SoCoordinate3::point.

By default the field contains no coordinates.

See also:

SoCoordinate3

Referenced by SoIndexedShape::computeBBox(), SoNonIndexedShape::computeCoordBBox(), doAction(), SoNonIndexedShape::fixNumVerticesPointers(), SoIndexedTriangleStripSet::generateDefaultNormals(), getBoundingBox(), SoPointSet::getPrimitiveCount(), and SoVertexProperty().

SoMFVec2f SoVertexProperty::texCoordSame functionality as SoTextureCoordinate2::point. By default the field contains no coordinates.

See also:

SoTextureCoordinate2

Referenced by doAction(), and SoVertexProperty().

SoMFVec3f SoVertexProperty::texCoord3Same functionality as SoTextureCoordinate3::point. By default the field contains no coordinates.

See also:

SoTextureCoordinate3

Since:

Coin 2.0
TGS Inventor 2.6

Referenced by doAction(), and SoVertexProperty().

SoMFVec3f SoVertexProperty::normalThis field defines a set of normal vectors in the same manner as SoNormal::vector. By default the field contains no vectors.

See also:

SoNormal

Referenced by doAction(), SoIndexedTriangleStripSet::generateDefaultNormals(), and SoVertexProperty().

SoSFEnum SoVertexProperty::normalBindingDefines how to bind the normals specified in the SoVertexProperty::normal set to the parts of the 'owner' shape. Must be one of the values in the SoVertexProperty::Binding enum.

Default value of the field is SoVertexProperty::PER_VERTEX_INDEXED.

See also:

SoNormalBinding

Referenced by doAction(), SoIndexedTriangleStripSet::generateDefaultNormals(), and SoVertexProperty().

SoMFUInt32 SoVertexProperty::orderedRGBAA set of 'packed' 32-bit diffusecolor plus transparency values. Works in the same manner as the SoPackedColor::orderedRGBA field.

By default the field has no data.

See also:

SoPackedColor

Referenced by doAction(), notify(), and SoVertexProperty().

SoSFEnum SoVertexProperty::materialBindingDefines how to bind the colorvalues specified in the SoVertexProperty::orderedRGBA set to the parts of the 'owner' shape. Must be one of the values in the SoVertexProperty::Binding enum.

Default value of the field is SoVertexProperty::OVERALL.

See also:

SoMaterialBinding

Referenced by doAction(), and SoVertexProperty().

Author

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