Class TTextNode

DescriptionHierarchyFieldsMethodsProperties

Unit

Declaration

type TTextNode = class(TAbstractX3DGeometryNode)

Description

no description available, TAbstractX3DGeometryNode description follows
no description available, TAbstractGeometryNode description follows

Geometry nodes are the only nodes that produces some visible results during rendering. Much of the VRML language is just a method of describing properties how geometry nodes are displayed (materials, transformations, lighting).

A few things that make geometry node special :

  • Only geometry nodes may have [Local]BoundingBox.

  • Only geometry nodes define something visible "in usual way" during rendering (Some other nodes in VRML / X3D are visible but in an unusual way, like Background and Fog. These nodes must be rendered in a special way — they are not affected in any usual way by the current transformation matrix etc.)

  • Geometry nodes are never "grouping nodes", in particular there's never a geometry node that is (direct or indirect) child of another geometry node. So there's no need to be concerned whether geometry nodes' children are included in things like [Local]BoundingBox or Triangles/VerticesCount.

  • Geometry nodes don't affect anything in graph traverse state. (This is important mostly for VRML 1.0, since in newer VRML / X3D "graph traverse state" is not that important.)

For X3D, this descends from TAbstractNode, and TAbstractX3DGeometryNode descends from us. This way in X3D TAbstractX3DGeometryNode descends from this, and also X3D hierarchy is preserved (X3DGeometryNode must descend from X3DNode).

Hierarchy

Overview

Methods

Public procedure CreateNode; override;
Public class function ClassNodeTypeName: string; override;
Public class function URNMatching(const URN: string): boolean; override;
Public function LocalBoundingBox(State: TX3DGraphTraverseState; ProxyGeometry: TAbstractGeometryNode; ProxyState: TX3DGraphTraverseState): TBox3D; override;
Public function VerticesCount(State: TX3DGraphTraverseState; OverTriangulate: boolean; ProxyGeometry: TAbstractGeometryNode; ProxyState: TX3DGraphTraverseState): Cardinal; override;
Public function TrianglesCount(State: TX3DGraphTraverseState; OverTriangulate: boolean; ProxyGeometry: TAbstractGeometryNode; ProxyState: TX3DGraphTraverseState): Cardinal; override;
Public function FontStyle: TFontStyleNode;

Properties

Public property FdFontStyle: TSFNode read FFdFontStyle;
Public property FdLength: TMFFloat read FFdLength;
Public property FdMaxExtent: TSFFloat read FFdMaxExtent;
Public property FdString: TMFString read FFdString;
Public property EventLineBounds: TX3DEvent read FEventLineBounds;
Public property EventOrigin: TX3DEvent read FEventOrigin;
Public property EventTextBounds: TX3DEvent read FEventTextBounds;
Public property FdSolid: TSFBool read FFdSolid;

Description

Methods

Public procedure CreateNode; override;
 
Public class function ClassNodeTypeName: string; override;
 
Public class function URNMatching(const URN: string): boolean; override;
 
Public function LocalBoundingBox(State: TX3DGraphTraverseState; ProxyGeometry: TAbstractGeometryNode; ProxyState: TX3DGraphTraverseState): TBox3D; override;
 
Public function VerticesCount(State: TX3DGraphTraverseState; OverTriangulate: boolean; ProxyGeometry: TAbstractGeometryNode; ProxyState: TX3DGraphTraverseState): Cardinal; override;
 
Public function TrianglesCount(State: TX3DGraphTraverseState; OverTriangulate: boolean; ProxyGeometry: TAbstractGeometryNode; ProxyState: TX3DGraphTraverseState): Cardinal; override;
 
Public function FontStyle: TFontStyleNode;

This returns FdFontStyle.Value. Returns nil if FdFontStyle.Value is nil or if it's not TFontStyleNode.

Properties

Public property FdFontStyle: TSFNode read FFdFontStyle;
 
Public property FdLength: TMFFloat read FFdLength;
 
Public property FdMaxExtent: TSFFloat read FFdMaxExtent;
 
Public property FdString: TMFString read FFdString;
 
Public property EventLineBounds: TX3DEvent read FEventLineBounds;
 
Public property EventOrigin: TX3DEvent read FEventOrigin;
 
Public property EventTextBounds: TX3DEvent read FEventTextBounds;
 
Public property FdSolid: TSFBool read FFdSolid;
 

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