Class TWWWAnchorNode_1

Unit

Declaration

type TWWWAnchorNode_1 = class(TAbstractSeparatorNode_1)

Description

This item has no description. Showing description inherited from TAbstractSeparatorNode_1.

Base class for VRML 1.0 nodes that push / pop all attributes and matrices. It is used in implementation of VRML 1.0 Separator and WWWAnchor. Also WWWInline does the same work, when it's "separate" field is true.

Hierarchy

Overview

Methods

Public procedure CreateNode; override;
Public class function ClassX3DType: string; override;
Public class function ForVRMLVersion(const Version: TX3DVersion): Boolean; override;

Properties

Public property FdName: TSFString read FFdName;
Public property NameField: String read GetNameField write SetNameField;
Public property FdDescription: TSFString read FFdDescription;
Public property Description: String read GetDescription write SetDescription;
Public property FdMap: TSFEnum read FFdMap;

Description

Methods

Public procedure CreateNode; override;

This item has no description. Showing description inherited from TAbstractSeparatorNode_1.CreateNode.

Automatically generated node properties.

Do not edit this file manually! To add new properties: - add them to the text files in tools/internal/x3d-nodes-to-pascal/nodes-specification/ , - and regenerate include files by running x3d-nodes-to-pascal

Public class function ClassX3DType: string; override;

This item has no description. Showing description inherited from TX3DNode.ClassX3DType.

Node type name in VRML/X3D, for this class. Normal VRML/X3D node classes should override this to return something non-empty, and then X3DType automatically will return the same value.

Empty for classes that don't have a hardcoded VRML/X3D node name, like a special TX3DUnknownNode. Such special classes should override then X3DType to return actual non-empty name there.

You usually should call X3DType. The only use of this method is that it works on classes (it's "class function"), without needing at actual instance.

Public class function ForVRMLVersion(const Version: TX3DVersion): Boolean; override;

This item has no description. Showing description inherited from TX3DNode.ForVRMLVersion.

Some nodes are present only in specific VRML/X3D version. This functions decides it.

For example some nodes can only work in VRML < 2.0, some others only in VRML >= 2.0. There are even some pairs of nodes: for example TConeNode_1 works with VRML < 2.0, TConeNode works with VRML >= 2.0.

NodesManager will use this.

Default implementation of this function returns always True. Generally, I don't try to set this too aggresively — in other words, for all cases when it's sensible, I allow nodes to be used in every VRML/X3D version, even when official specification doesn't. This means that when reading VRML 1.0 files actually a large part of VRML 2.0 is allowed too, and also while reading VRML 2.0 many constructs from VRML 1.0 (officially no longer present in VRML 2.0) are allowed too. I'm trying to support what I call a "sum of VRML 1.0 and 2.0".

In practice I only use this function when various VRML/X3D versions specify the same node name but

  • With different fields.

    For example Cone and Cylinder have slightly different fields, due to the fact that VRML 2.0 resigned from using TSFBitMask fields.

  • With different behavior.

    For example definitions of Sphere for VRML 1.0 and 2.0 are practically equal. However, the behavior from where to take texture and material info is different — in VRML 1.0 we take last Texture2, Material etc. nodes, while in VRML 2.0 we look in parent Shape's "appearance" field. So once again two different Sphere classes are needed.

Properties

Public property FdName: TSFString read FFdName;

Internal wrapper for property NameField. This wrapper API may change, we advise to access simpler NameField instead.

Public property NameField: String read GetNameField write SetNameField;

This item has no description.

Public property FdDescription: TSFString read FFdDescription;

Internal wrapper for property Description. This wrapper API may change, we advise to access simpler Description instead.

Public property Description: String read GetDescription write SetDescription;

This item has no description.

Public property FdMap: TSFEnum read FFdMap;

Internal wrapper for property Map. This wrapper API may change, we advise to access simpler Map instead.


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