SoVertexProperty

InventorModule

genre	InventorNodesAutomatic
author	Silicon Graphics Inc
package	MeVisLab/Standard
definition	inventor.def

Purpose

The property node SoVertexProperty may be used to efficiently specify coordinates, normals, texture coordinates, colors, transparency values, material binding, and normal binding for vertex-based shapes, such as IndexedShapes or NonIndexedShapes. A SoVertexProperty node can be used as a child of a group node in a scene graph, in which case the properties it specifies are inherited by subsequent shape nodes in the graph. It can also be directly referenced as the VertexProperty SoSFField of a vertex-based shape, bypassing scene graph inheritance.

When directly referenced by a VertexProperty SoSFField of a vertex-based shape, the SoVertexProperty node is the most efficient way to specify vertex-based shapes. Using the directly referenced SoVertexProperty node results in significantly faster scene rendering than scene graph inheritance of vertex properties, provided all required vertex properties are specified in the SoVertexProperty node.

Because the class SoVertexProperty is derived from SoNode, a vertex property node can be inserted as a child node in a scene graph. When inserted as a node in a scene graph, the SoVertexProperty node is traversed like any other property node, and the properties it specifies are inherited by subsequent shape nodes in the scene graph. It specifies the current material and normal bindings and can be used to specify the current 3D coordinates, normals, texture coordinates, diffuse colors, and transparencies.

All multiple-valued fields in the SoVertexProperty node are optional. If a field is not present (i.e., if it has 0 values), shapes requiring the missing information must obtain it from the current traversal state. However, users are cautioned that for optimal performance, the vertex property node should be referenced as the VertexProperty field of a SoVertexShape and should specify all values required to render that shape.

The various fields in a vertex property node can be used in place of corresponding fields in other property nodes, as follows: The vertex field contains 3D coordinates, similar to the point field of an SoCoordinate3 node. The Normal field contains normal vectors, as found in the vector field of the SoNormal node. The Ordered RGBA field contains packed colors in hexadecimal format 0xrrggbbaa, where rr is the red value (between 00 and 0xFF hex), gg is the green value (between 00 and 0xFF hex), bb is the blue value (between 00 and 0xFF hex), and aa is the alpha value (between 00 = transparent and 0xFF = opaque). The packed colors are equivalent to an SoPackedColor node and provide values for both diffuse color and transparency. The Tex Coord field replaces the point field of the SoTextureCoordinate2 node.

If the transparency type is SoGLRenderAction::SCREEN_DOOR, only the first transparency value will be used. With other transparency types, multiple transparencies will be used.

The Material Binding field replaces the value field of the SoMaterialBinding node. The Material Binding field in a directly referenced SoVertexProperty node has no effect unless there is a non-empty Ordered RGBA field, in which case the material binding specifies the assignment of diffuse colors and alpha values to the shape. The Material Binding field can take any of the material bindings supported by Open Inventor.

The Normal Binding field replaces the value field of the SoNormalBinding node. The Normal Binding field of a directly referenced SoVertexProperty node has no effect unless there is a non-empty normal field, in which case the normal binding specifies the assignment of normal vectors to the shape. The value of the Normal Binding field can be any of the normal bindings supported by Open Inventor.

Windows

Default Panel

Output Fields

self

name: self, type: SoNode

Parameter Fields

Field Index

Material Binding: Enum

Normal: Vector3List

Normal Binding: Enum

Ordered RGBA: IntegerList

Tex Coord: Vector2List

Vertex: Vector3List

Visible Fields

Vertex

name: vertex, type: Vector3List, default: [  ]

Sets the vertex coordinate(s).

Normal

name: normal, type: Vector3List, default: [  ]

Sets the normal vector(s).

Tex Coord

name: texCoord, type: Vector2List, default: [  ]

Sets the texture coordinate(s).

Ordered RGBA

name: orderedRGBA, type: IntegerList, default: [  ]

Sets the packed color(s), including transparency values.

Material Binding

name: materialBinding, type: Enum, default: OVERALL

Defines the material binding.

Values:

Title	Name	Description
Overall	OVERALL	The entire object has the same material.
Per Vertex	PER_VERTEX	One material for each vertex of the object.
Per Vertex Indexed	PER_VERTEX_INDEXED	One material for each vertex, indexed.
Per Face	PER_FACE	One material for each face of the object.
Per Face Indexed	PER_FACE_INDEXED	One material for each face, indexed.
Per Part	PER_PART	One material for each part of the object.
Per Part Indexed	PER_PART_INDEXED	One material for each part, indexed.

Normal Binding

name: normalBinding, type: Enum, default: PER_VERTEX_INDEXED

Defines the normal binding.

Values:

Title	Name	Description
Overall	OVERALL	The entire object has the same normal.
Per Vertex	PER_VERTEX	One normal for each vertex of the object.
Per Vertex Indexed	PER_VERTEX_INDEXED	One normal for each vertex, indexed.
Per Face	PER_FACE	One normal for each face of the object.
Per Face Indexed	PER_FACE_INDEXED	One normal for each face, indexed.
Per Part	PER_PART	One normal for each part of the object.
Per Part Indexed	PER_PART_INDEXED	One normal for each part, indexed.