Class TAbstractGroupingNode

Unit

X3DNodes

Declaration

type TAbstractGroupingNode = class(TAbstractChildNode)

Description

Base node that may contain children nodes. Note that this descends from TAbstractChildNode, so it can be inserted as child of another grouping node. So, you can create a hierarchy of nodes with any depth.

Handles TTransformFunctionality for any descendant that defines an instance of it.

Hierarchy

• TObject
• TPersistent
• TX3DFileItem
• TX3DNode
• TAbstractNode
• TAbstractChildNode
• TAbstractGroupingNode

Overview

Methods

	function SeparateGroup: boolean; virtual;
	procedure BeforeTraverse(StateStack: TX3DGraphTraverseStateStack); override;
	procedure AfterTraverse(StateStack: TX3DGraphTraverseStateStack); override;
	procedure CreateNode; override;
	destructor Destroy; override;

Description

Methods

	function SeparateGroup: boolean; virtual;
If True (default implementation in this class), then this really behaves like a grouping node. If False, this allows everything to "leak out" (transform changes, VRML 1.0 state changes etc.). Possibility useful for VRML 1.0 extension https://castle-engine.io/x3d_extensions.php#section_ext_wwwinline_separate

	procedure BeforeTraverse(StateStack: TX3DGraphTraverseStateStack); override;

	procedure AfterTraverse(StateStack: TX3DGraphTraverseStateStack); override;

	procedure CreateNode; override;

	destructor Destroy; override;

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