Class TTransformNode_1

Unit

Declaration

type TTransformNode_1 = class(TAbstractTransformationNode_1)

Description

This item has no description. Showing description inherited from TAbstractTransformationNode_1.

Common base class for all VRML 1 nodes that modify the transformation.

Hierarchy

Overview

Methods

Protected procedure MiddleTraverse(StateStack: TX3DGraphTraverseStateStack); override;
Public procedure CreateNode; override;
Public class function ClassX3DType: String; override;
Public class function ForVRMLVersion(const Version: TX3DVersion): Boolean; override;

Properties

Public property FdTranslation: TSFVec3f read FFdTranslation;
Public property Translation: TVector3 read GetTranslation write SetTranslation;
Public property FdRotation: TSFRotation read FFdRotation;
Public property Rotation: TVector4 read GetRotation write SetRotation;
Public property FdScaleFactor: TSFVec3f read FFdScaleFactor;
Public property ScaleFactor: TVector3 read GetScaleFactor write SetScaleFactor;
Public property FdScaleOrientation: TSFRotation read FFdScaleOrientation;
Public property ScaleOrientation: TVector4 read GetScaleOrientation write SetScaleOrientation;
Public property FdCenter: TSFVec3f read FFdCenter;
Public property Center: TVector3 read GetCenter write SetCenter;

Description

Methods

Protected procedure MiddleTraverse(StateStack: TX3DGraphTraverseStateStack); override;

This item has no description.

Public procedure CreateNode; override;

Create node fields and events.

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 FdTranslation: TSFVec3f read FFdTranslation;

Internal wrapper for property Translation. This wrapper API may change, we advise to access simpler Translation instead, if it is defined (TODO: for now, some field types do not have a simpler counterpart).

Public property Translation: TVector3 read GetTranslation write SetTranslation;

This item has no description.

Public property FdRotation: TSFRotation read FFdRotation;

Internal wrapper for property Rotation. This wrapper API may change, we advise to access simpler Rotation instead, if it is defined (TODO: for now, some field types do not have a simpler counterpart).

Public property Rotation: TVector4 read GetRotation write SetRotation;

This item has no description.

Public property FdScaleFactor: TSFVec3f read FFdScaleFactor;

Internal wrapper for property ScaleFactor. This wrapper API may change, we advise to access simpler ScaleFactor instead, if it is defined (TODO: for now, some field types do not have a simpler counterpart).

Public property ScaleFactor: TVector3 read GetScaleFactor write SetScaleFactor;

This item has no description.

Public property FdScaleOrientation: TSFRotation read FFdScaleOrientation;

Internal wrapper for property ScaleOrientation. This wrapper API may change, we advise to access simpler ScaleOrientation instead, if it is defined (TODO: for now, some field types do not have a simpler counterpart).

Public property ScaleOrientation: TVector4 read GetScaleOrientation write SetScaleOrientation;

This item has no description.

Public property FdCenter: TSFVec3f read FFdCenter;

Internal wrapper for property Center. This wrapper API may change, we advise to access simpler Center instead, if it is defined (TODO: for now, some field types do not have a simpler counterpart).

Public property Center: TVector3 read GetCenter write SetCenter;

This item has no description.


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