Class TPointSetNode

Unit

Declaration

type TPointSetNode = class(TAbstractGeometryNode)

Description

Points.

Hierarchy

Overview

Methods

Protected function DirectEnumerateActive(Func: TEnumerateChildrenFunction): Pointer; override;
Public class function ForVRMLVersion(const Version: TX3DVersion): boolean; override;
Public function TrianglesCount(State: TX3DGraphTraverseState; ProxyGeometry: TAbstractGeometryNode; ProxyState: TX3DGraphTraverseState): Cardinal; override;
Public function Lit(State: TX3DGraphTraverseState): boolean; override;
Public function InternalCoord(State: TX3DGraphTraverseState; out ACoord: TMFVec3f): boolean; override;
Public function CoordField: TSFNode; override;
Public function ColorField: TSFNode; override;
Public function InternalFogCoord: TMFFloat; override;
Public function AttribField: TMFNode; override;
Public procedure CreateNode; override;
Public class function ClassX3DType: string; override;
Public procedure SetAttrib(const Value: array of TAbstractVertexAttributeNode);

Properties

Public property FdAttrib: TMFNode read FFdAttrib;
Public property FdColor: TSFNode read FFdColor;
Public property Color: TAbstractColorNode read GetColor write SetColor;
Public property FdCoord: TSFNode read FFdCoord;
Public property Coord: TAbstractCoordinateNode read GetCoord write SetCoord;
Public property FdFogCoord: TSFNode read FFdFogCoord;
Public property FogCoord: TFogCoordinateNode read GetFogCoord write SetFogCoord;

Description

Methods

Protected function DirectEnumerateActive(Func: TEnumerateChildrenFunction): Pointer; override;

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

Enumerate all active child nodes of given node.

"Active nodes" are the ones affecting current look or collisions, e.g. from Switch node only one child will be enumerated. See Traverse for more precise definition.

"Direct" means that this enumerates only direct descendants, i.e. this is not recursive. See methods like Traverse or EnumerateNodes if you want recursive behavior.

This can enumerate both VRML1Children nodes and nodes within TSFNode and TMFNode fields.

Default implementation in this class enumerates all Children nodes of VRML 1.0. If you need to remove some children for VRML 1.0 (e.g. for Switch or LOD nodes) or add some children for VRML 2.0 you have to override this. You do not need to call inherited when overriding this — in fact, you should not, if you want to omit some nodes.

Stops and returns immediately if Func returns non-nil for some child.

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.

Public function TrianglesCount(State: TX3DGraphTraverseState; ProxyGeometry: TAbstractGeometryNode; ProxyState: TX3DGraphTraverseState): Cardinal; override;

This item has no description.

Public function Lit(State: TX3DGraphTraverseState): boolean; override;

This item has no description. Showing description inherited from TAbstractGeometryNode.Lit.

Is this object lit, disregarding the material. Default implementation in TAbstractGeometryNode says True.

Public function InternalCoord(State: TX3DGraphTraverseState; out ACoord: TMFVec3f): boolean; override;

This item has no description. Showing description inherited from TAbstractGeometryNode.InternalCoord.

Return node's list of coordinates. Returns False if node is not based on coordinates. Returns True and sets ACoord if the node is based on coordinates. Even when returns True, it can set ACoord = Nil, which means that node is based on coordinates but they are empty right now (so for example bounding box may be considered empty).

In base TAbstractGeometryNode class this always returns False.

Override this for descendants that have some kind of "coord" field, then this should return True and set ACoord to coord.point field, assuming that coord is set and specifies Coordinate node. Override this even if coordinates affect the look indirectly, e.g. NURBS "controlPoint" fields also should be returned here. Otherwise should return True and set ACoord = Nil.

For VRML 1.0, coord may be taken from State, that's why we have to pass current traverse state here.

Public function CoordField: TSFNode; override;

This item has no description. Showing description inherited from TAbstractGeometryNode.CoordField.

Node's "coord" field where you can place TCoordinateNode, or Nil if not available.

This gives you more possibilities than the InternalCoord and InternalCoordinates methods (as you can assign texCoord using this). However, it doesn't work for old VRML 1.0 (since they have coordinate information, but no "coord" field).

Public function ColorField: TSFNode; override;

This item has no description.

Public function InternalFogCoord: TMFFloat; override;

This item has no description.

Public function AttribField: TMFNode; override;

This item has no description.

Public procedure CreateNode; override;

This item has no description. Showing description inherited from TAbstractGeometryNode.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 procedure SetAttrib(const Value: array of TAbstractVertexAttributeNode);

This item has no description.

Properties

Public property FdAttrib: TMFNode read FFdAttrib;

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

Public property FdColor: TSFNode read FFdColor;

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

Public property Color: TAbstractColorNode read GetColor write SetColor;

This item has no description.

Public property FdCoord: TSFNode read FFdCoord;

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

Public property Coord: TAbstractCoordinateNode read GetCoord write SetCoord;

This item has no description.

Public property FdFogCoord: TSFNode read FFdFogCoord;

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

Public property FogCoord: TFogCoordinateNode read GetFogCoord write SetFogCoord;

This item has no description.


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