Class TLineSetNode

Unit

Declaration

type TLineSetNode = class(TAbstractGeometryNode)

Description

Lines.

Hierarchy

Overview

Methods

Protected function DirectEnumerateActive(Func: TEnumerateChildrenFunction): Pointer; override;
Protected function InternalCoordRangesCounts(out RangeCount: TInt32List; out SRanges, SRangeName: string; out RangeMinimumCount: Cardinal): boolean; override;
Public destructor Destroy; 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 function TrianglesCount(State: TX3DGraphTraverseState; ProxyGeometry: TAbstractGeometryNode; ProxyState: TX3DGraphTraverseState): Cardinal; override;
Public function Lit(State: TX3DGraphTraverseState): boolean; override;
Public procedure CreateNode; override;
Public class function ClassX3DType: string; override;
Public procedure SetAttrib(const Value: array of TAbstractVertexAttributeNode);
Public procedure SetVertexCount(const Value: array of Int32); overload;
Public procedure SetVertexCount(const Value: TInt32List); overload;

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;
Public property FdVertexCount: TMFInt32 read FFdVertexCount;
Public property FdMode: TSFStringEnum read FFdMode;
Public property Mode: TLineMode read GetMode write SetMode;

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.

Protected function InternalCoordRangesCounts(out RangeCount: TInt32List; out SRanges, SRangeName: string; out RangeMinimumCount: Cardinal): boolean; override;

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

Returns an information how to split InternalCoord array into ranges.

When CoordIndex = Nil, then if the node's InternalCoord array can be divided into some "ranges", we will use this information. This is used (and should be overridden) for X3D non-indexed nodes, like fanCount or stripCount or vertexCount.

What precisely is a "range of coordinates" is not specified here. It may be a line stip, or one triangle strip, etc. — depending on the descendant.

Returns True if this is available. In this case, RangeCount must be set to something <> nil, and the rest of returned variables are mainly to generate proper warnings by MakeCoordRanges.

Public destructor Destroy; override;

This item has no description.

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 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 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 procedure SetAttrib(const Value: array of TAbstractVertexAttributeNode);

This item has no description.

Public procedure SetVertexCount(const Value: array of Int32); overload;

Array of counts that split the line vertexes. Exact interpretation depends on the Mode value:

lmStrip

Render a number of line strips. Each count on this array is the count of vertexes in a line strip. Each line strip is a polyline, i.e. a sequence of lines from the first vertex (in given line strip) to the last vertex (again, in given line strip).

lmLoop

Render a number of line loops. Each count on this array is the number of vertexes in a line loop. Each line loop is a closed polyline, i.e. a sequence of lines from the first vertex (in given line loop) to the last vertex (again, in given line loop). Moreover, within each line loop, there's a closing line from last vertex to the first.

lmPair

Render a number of line segments. Counts of this array are ignored, so there's not much point in calling SetVertexCount. In this mode, every 2 vertexes define a line segment.

Public procedure SetVertexCount(const Value: TInt32List); overload;

Array of counts that split the line vertexes. Exact interpretation depends on the Mode value:

lmStrip

Render a number of line strips. Each count on this array is the count of vertexes in a line strip. Each line strip is a polyline, i.e. a sequence of lines from the first vertex (in given line strip) to the last vertex (again, in given line strip).

lmLoop

Render a number of line loops. Each count on this array is the number of vertexes in a line loop. Each line loop is a closed polyline, i.e. a sequence of lines from the first vertex (in given line loop) to the last vertex (again, in given line loop). Moreover, within each line loop, there's a closing line from last vertex to the first.

lmPair

Render a number of line segments. Counts of this array are ignored, so there's not much point in calling SetVertexCount. In this mode, every 2 vertexes define a line segment.

Properties

Public property FdAttrib: TMFNode read FFdAttrib;

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

Public property FdColor: TSFNode read FFdColor;

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

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, if it is defined (TODO: for now, some field types do not have a simpler counterpart).

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, if it is defined (TODO: for now, some field types do not have a simpler counterpart).

Public property FogCoord: TFogCoordinateNode read GetFogCoord write SetFogCoord;

This item has no description.

Public property FdVertexCount: TMFInt32 read FFdVertexCount;

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

Public property FdMode: TSFStringEnum read FFdMode;

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

Public property Mode: TLineMode read GetMode write SetMode;

How to interpret the vertexes: as a set of strips (connected line segments), loops (connected line segments with additional segment to form a loop), or just pairs of vertexes (each pair defines a line segment). See possible TLineMode values for details.


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