Class TAbstractCameraNode_1

Unit

Declaration

type TAbstractCameraNode_1 = class(TAbstractViewpointNode)

Description

Common base class for all cameras in VRML 1.0.

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 FdPosition: TSFVec3f read FFdPosition;
Public property Position: TVector3 read GetPosition write SetPosition;
Public property FdFocalDistance: TSFFloat read FFdFocalDistance;
Public property FocalDistance: Single read GetFocalDistance write SetFocalDistance;
Public property FdNearDistance: TSFFloat read FFdNearDistance;
Public property NearDistance: Single read GetNearDistance write SetNearDistance;
Public property FdFarDistance: TSFFloat read FFdFarDistance;
Public property FarDistance: Single read GetFarDistance write SetFarDistance;

Description

Methods

Public procedure CreateNode; override;

This item has no description. Showing description inherited from TAbstractBindableNode.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 FdPosition: TSFVec3f read FFdPosition;

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

Public property Position: TVector3 read GetPosition write SetPosition;

This item has no description.

Public property FdFocalDistance: TSFFloat read FFdFocalDistance;

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

Public property FocalDistance: Single read GetFocalDistance write SetFocalDistance;

This item has no description.

Public property FdNearDistance: TSFFloat read FFdNearDistance;

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

Public property NearDistance: Single read GetNearDistance write SetNearDistance;

Ignored. Unknown extension to VRML 1.0 spec, found on models in http://www-vrl.umich.edu/sel_prj/EECS498/ .

Public property FdFarDistance: TSFFloat read FFdFarDistance;

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

Public property FarDistance: Single read GetFarDistance write SetFarDistance;

Ignored. Unknown extension to VRML 1.0 spec, found on models in http://www-vrl.umich.edu/sel_prj/EECS498/ .


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