Click or drag to resize
SoOctreeOrdering Class

Note: This API is now obsolete.

Group node derived from SoRenderList that maintains a transparent octree organization of the shapes below it.

Inheritance Hierarchy

Namespace: OIV.Inventor.Nodes
Assembly: OIV.Inventor (in OIV.Inventor.dll) Version: 9.9.13.0 (9.9.13.0)
Syntax
[ObsoleteAttribute("See documentation for more details")]
[EditorBrowsableAttribute(EditorBrowsableState.Never)]
public class SoOctreeOrdering : SoRenderList

The SoOctreeOrdering type exposes the following members.

Constructors
  NameDescription
Public methodSoOctreeOrdering

Default constructor.

Public methodSoOctreeOrdering(Int32)

Constructor that takes approximate number of children as a hint.

Top
Methods
  NameDescription
Public methodAddChild

Adds a child as last one in group.

(Inherited from SoGroup.)
Public methodAddRenderObjectName

Adds a new name to the search list.

(Inherited from SoRenderList.)
Public methodAddRenderObjectType

Adds a new type to the search list.

(Inherited from SoRenderList.)
Public methodAffectsState
(Inherited from SoSeparator.)
Public methodCallback
(Inherited from SoSeparator.)
Public methodClearCacheList
(Inherited from SoSeparator.)
Public methodCopy
Calls Copy(false).
(Inherited from SoNode.)
Public methodCopy(Boolean)

Creates and returns an exact copy of the node.

(Inherited from SoNode.)
Public methodCopyFieldValues(SoFieldContainer)
Calls CopyFieldValues(fc, false).
(Inherited from SoFieldContainer.)
Public methodCopyFieldValues(SoFieldContainer, Boolean)

Copies the contents of fc's fields into this object's fields.

(Inherited from SoFieldContainer.)
Public methodDispose
Releases all resources used by SoDisposable.
(Inherited from SoDisposable.)
Public methodDistribute
(Inherited from SoSeparator.)
Public methodDoAction
(Inherited from SoSeparator.)
Public methodEnableNotify

Notification at this Field Container is enabled (if flag == true) or disabled (if flag == false).

(Inherited from SoFieldContainer.)
Public methodEquals
Determines whether the specified Object is equal to the current Object.
(Inherited from Object.)
Public methodFieldsAreEqual

Returns true if this object's fields are exactly equal to fc's fields.

(Inherited from SoFieldContainer.)
Public methodFindChild

Finds index of given child within group.

(Inherited from SoGroup.)
Public methodGet

Returns the values of the fields of this object in the Open Inventor ASCII file format in the given string.

(Inherited from SoFieldContainer.)
Public methodGetAllFields

Returns a list of fields, including the eventIn's and eventOut's.

(Inherited from SoFieldContainer.)
Public methodGetAlternateRep

This method is called by actions to allow the node to provide an "alternate representation" when appropriate (typically depending on the action type).

(Inherited from SoNode.)
Public methodGetBoundingBox
Public methodGetChild

Returns pointer the child node with the given index.

(Inherited from SoGroup.)
Public methodGetEventIn

Returns a the eventIn with the given name.

(Inherited from SoFieldContainer.)
Public methodGetEventOut

Returns the eventOut with the given name.

(Inherited from SoFieldContainer.)
Public methodGetField

Returns a the field of this object whose name is fieldName.

(Inherited from SoFieldContainer.)
Public methodGetFieldName

Returns the name of the given field in the fieldName argument.

(Inherited from SoFieldContainer.)
Public methodGetFields

Appends references to all of this object's fields to resultList, and returns the number of fields appended.

(Inherited from SoFieldContainer.)
Public methodGetHandleTransparency
Public methodGetHashCode
Overrides GetHashCode().
(Inherited from SoNetBase.)
Public methodGetMatrix
(Inherited from SoSeparator.)
Public methodGetName

Returns the name of an instance.

(Inherited from SoBase.)
Public methodGetNumChildren

Returns number of children.

(Inherited from SoGroup.)
Public methodGetNumRenderObjectNames

Returns number of names in the search list.

(Inherited from SoRenderList.)
Public methodGetNumRenderObjectTypes

Returns number of types in the search list.

(Inherited from SoRenderList.)
Public methodGetPrimitiveCount
Public methodGetRenderObjectName

Returns the i th name of the search list.

(Inherited from SoRenderList.)
Public methodGetRenderObjectType

Returns the i th type of the search list.

(Inherited from SoRenderList.)
Public methodGetRenderUnitID
(Inherited from SoNode.)
Public methodGetStringName (Inherited from SoBase.)
Public methodGetType
Gets the Type of the current instance.
(Inherited from Object.)
Public methodGLRender
(Inherited from SoSeparator.)
Public methodGLRenderBelowPath
Public methodGLRenderInPath
(Inherited from SoSeparator.)
Public methodGLRenderOffPath
(Inherited from SoSeparator.)
Public methodGrabEventsCleanup
(Inherited from SoNode.)
Public methodGrabEventsSetup
(Inherited from SoNode.)
Public methodHandleEvent
(Inherited from SoSeparator.)
Public methodHasDefaultValues

Returns true if all of the object's fields have their default values.

(Inherited from SoFieldContainer.)
Public methodInsertChild

Adds a child so that it becomes the one with the given index.

(Inherited from SoGroup.)
Public methodIsBoundingBoxIgnoring

Used by BoundingBoxAction to known if bounding box computation should be ignored or not.

(Inherited from SoGroup.)
Public methodIsChainingOn

Returns true if the octree is chained with another culling node.

Public methodIsNotifyEnabled

Notification is the process of telling interested objects that this object has changed.

(Inherited from SoFieldContainer.)
Public methodIsOctreeDrawing

Returns true if octree drawing is enabled.

Public methodIsOverride

Returns the state of the override flag.

(Inherited from SoNode.)
Public methodIsSynchronizable

Gets the ScaleViz synchronizable state of this object.

(Inherited from SoBase.)
Public methodPick
(Inherited from SoGroup.)
Public methodRayPick
Public methodRemoveAllChildren

Removes all children from group.

(Inherited from SoGroup.)
Public methodRemoveAllRenderObjectNames

Clears all names from the search list.

(Inherited from SoRenderList.)
Public methodRemoveChild(Int32)

Removes child with given index from group.

(Inherited from SoGroup.)
Public methodRemoveChild(SoNode)

Removes first instance of given child from group.

(Inherited from SoGroup.)
Public methodRemoveRenderObjectName

Removes a name from the search list.

(Inherited from SoRenderList.)
Public methodRemoveRenderObjectType

Removes a type from the search list.

(Inherited from SoRenderList.)
Public methodReplaceChild(Int32, SoNode)

Replaces child with given index with new child.

(Inherited from SoGroup.)
Public methodReplaceChild(SoNode, SoNode)

Replaces first instance of given child with new child.

(Inherited from SoGroup.)
Public methodReset

Allows to rebuild the octree from scratch.

Public methodSearch
(Inherited from SoSeparator.)
Public methodSet

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.

(Inherited from SoFieldContainer.)
Public methodSetHandleTransparency

If handle transparency is turned on, the octree will handle transparency and render cache transparent objects.

Public methodSetName (Inherited from SoBase.)
Public methodSetOctreeDrawing

Enables/disables octree drawing.

Public methodSetOverride

Turns the override flag on or off.

(Inherited from SoNode.)
Public methodSetSynchronizable

Sets this to be a ScaleViz synchronizable object.

(Inherited from SoBase.)
Public methodSetToDefaults

Sets all fields in this object to their default values.

(Inherited from SoFieldContainer.)
Public methodToString
Converts this SoBase structure to a human readable string.
(Inherited from SoBase.)
Public methodTouch

Marks an instance as modified, simulating a change to it.

(Inherited from SoNode.)
Public methodWrite
(Inherited from SoGroup.)
Top
Properties
  NameDescription
Public propertyadjustDecimation

If true, the octree will alter the decimation percentage for objects depending on how large they are in the view.

Public propertyboundingBoxCaching

Whether to cache during bounding box traversal.

(Inherited from SoSeparator.)
Public propertyboundingBoxIgnoring

Whether to ignore this node during bounding box traversal.

(Inherited from SoGroup.)
Public propertyboundingBoxSubstitutes

Enables use of bounding boxes for cells in the octree that contain shapes, but would appear on the screen smaller than the dropScreenArea threshold.

Public propertydirectVizCaching

Whether to cache during OpenRTRT rendering traversal.

(Inherited from SoSeparator.)
Public propertydropCulling

Enables culling of shapes that are too small on the screen.

Public propertydropScreenArea

Sets threshold in pixels for drop culling and bounding box substitutes.

Public propertyfastEditing

Specifies the fast edit mode of the separator node.

(Inherited from SoSeparator.)
Public propertyIsDisposable
ISafeDisposable interface implementation.
(Inherited from SoDisposable.)
Public propertyisHead

Normally each culling node maintains its own render list.

(Inherited from SoRenderList.)
Public propertypickCulling

Whether to cull during picking traversal.

(Inherited from SoSeparator.)
Public propertyrenderCaching

Whether to cache during rendering traversal.

(Inherited from SoSeparator.)
Public propertyrenderCulling

Whether to cull during rendering traversal.

(Inherited from SoSeparator.)
Public propertyrenderUnitId

Used during the ScaleViz depth compositing process, this field specifies which render unit (OIRU) will render the sub scene graph below this separator.

(Inherited from SoSeparator.)
Public propertyStatic memberReportCallback

This callback can be used to get render statistics: the number of objects in the octree, and the number of objects actually rendered.

Public propertyuseMovingQueue

Sets how this node should handle moving render objects.

Public propertyUserData
Gets or sets the user data to be contained by the field container.
(Inherited from SoFieldContainer.)
Top
Remarks

This speeds view frustum culling in large scenes in which the viewer moves through the scene and much of the scene is not visible at any given time.

The SoOctreeOrdering node uses the functionality from SoRenderList to create a list of paths to the shapes beneath it. It then reorganizes the list of shapes into an octree division of space. During action traversal, it traverses the octree instead of the scene graph. This results in a front to back traversal that quickly skips sections of space that would be culled by the view frustum.

<font color="#0000FF">NOTE:</font> This class does not exist in Open Inventor 10.0 and later.

The OctreeOrdering node draws a bounding box to replace cells in the octree that contain shapes but that are too small, based on an approximate screen size. If a larger shape had already been rendered that passes through this cell, the cell will be culled instead of using the bounding box so that no rendered geometry will be covered by a bounding box. This behavior can be altered by the fields listed below.

To specify the maximum depth during octree ordering, use environment variable IV_OCTREE_MAX_DEPTH. The default is 8.

To request an outline of the octree quadrants be drawn as a debugging aid to allow you to see how your scene is distributed throughout the octree, set environment variable OIV_DRAW_OCTREE to 1 or use the method setOctreeDrawing.

Note: If an SoOcclusionCulling node is inserted below the SoOctreeOrdering node, the latter can pass its view-frustum-culled renderObject list to the occlusion node, which will perform an occlusion culling test to reduce even further the number of objects to render. See the isHead field of SoRenderList for additional info.

FILE FORMAT/DEFAULT

OctreeOrdering {
dropCulling true
dropScreenArea 5
boundingBoxSubstitutes true
useMovingQueue true
adjustDecimation true
renderCaching AUTO
boundingBoxCaching AUTO
renderCulling AUTO
pickCulling AUTO
fastEditing DISABLE
isHead true
}

ACTION BEHAVIOR

SoGLRenderAction, SoGetPrimitiveCountAction Uses octree spatial traversal, rendering front to back. All other actions use standard SoSeparator traversal. Sets: SoRenderObjectListElement

See Also