Re: [x3d-public] containerField

["George Anastassakis" <anastas@unipi.gr>]

> but: where are the children? they are visible, but here nothing appears:

Your shape has no appearance... add an Appearance node to its appearance 
field and it will show with a default material (all white):

SFNode shape_appearance = (SFNode) (shape.getField("appearance"));
X3DNode appearance = mainScene.createNode("Appearance");
shape_appearance.setValue(appearance);

> i thought that getRootNodes() returned all Nodes of the Scene. is that
> wrong? if yes, how can i achieve this? what would be  the correct way to
> make all nodes of the scene available (also the children of the 
> transform)?

As for the second question, getRootNodes returns only the top-level nodes in 
the scene. For instance, in your code, only the Transform node. To walk the 
scenegraph, write a recursive method that takes an X3DNode as an argument 
and does the following:

- Check if the node is a group or leaf node. A pretty straightforward (if 
not, currently, the only) way to check if a node is a group node, try to get 
a "children" field. If that fails, the node is a leaf node and has no 
children. Otherwise, the node is a group node and has children that can be 
accessed by getting the value of the children field as an X3DNode[].

- If the node is a group node, apply any processing required (e.g., 
transformations in case of a Transform node) and recurse for all children.

- If the node is a leaf node, just apply any processing required (e.g., 
System.out.println its type, add its fields to a JTree, etc).

You should then call this method for all nodes returned by the getRootNodes. 
This is a pretty much standard approach as to walking hierarchical 
structures.

Hope I helped

George 

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