Class TShapeHintsNode_1

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

Parse VRML node body element. Usually, this is a field. May also be VRML 1.0 style child node. May also be VRML 2.0 Script node interface declaration, etc. — see VRML 2.0 grammar spec.

This should be overriden to parse special features within particular nodes. While generally VRML is very clean and there's no need to override this, there's one use for this currently:

1. Since we handle a couple of VRML flavors (at least Inventor, VRML 1.0 and VRML 97), sometimes the same node has different fields to express the same things in various VRML flavors. So it may be useful to parse a field and copy it's value into other fields.

   Example: TShapeHintsNode_1 in Inventor parses "hints" field, and copies it's value to other fields as appropriate. "hints" field is not exposed in TShapeHintsNode_1 interface, so everything is clean in the interface, and under the hood TShapeHintsNode_1 can "magically" handle "hints" field for Inventor.

When overriding, always check inherited result first, and exit if inherited handled successfully. Otherwise either read your stuff and return True (Lexer should advance to the position of next "nodeBodyElement"). Or return False without changing Lexer position.

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.

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.

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

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

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

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

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