Class TLineSetNode

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.

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.

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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.

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).

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

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

Create node fields and events.

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.

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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.

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.

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).

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).

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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).

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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).

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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).

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).

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.