These topics describes how to use the 3D World Editor for common tasks involved in creating a virtual world.
For information about opening a file in the editor, see Open the 3D World Editor.
For a step-by-step tutorial, see Build and Connect a Virtual World.
Add virtual world objects by adding nodes in the tree structure pane. The hierarchy of nodes controls the scope to which node properties apply.
Note: Nodes must have unique names to work in the Simulink® 3D Animation™ product.
Use one of these approaches to add a node.
|Use the Nodes menu|
|Use a context menu for a node|
|Insert an object from a library|
For information about library objects, see 3D World Editor Library.
|Add an inlined virtual world 3D file|
You can inline VRML files (
The node that you add gets added to different locations in the hierarchy, depending on the node that you select to begin adding a node.
|Selected Node||Location of Added Node|
|At the bottom of the hierarchy|
|Node at the next level down from the ROOT node (for example,
a ||Above the selected node|
|A ||Under the |
You can copy a node below a top-level
and paste that copied node to be a child of another node, including
You can paste the copied node as either an explicit text copy (Paste) or as a referenced copy (Paste As Reference).
An explicit text copy allows you to edit properties of that node, independently from the original node that you copied.
A referenced copy node appears with the term
Referenced copies streamline the tree structure pane
display. Edits that you make to the original (referenced) node are
applied to the copied node, ensuring that the two nodes remain exact
copies of each other.
To copy and paste a node:
In the tree structure pane, select the node that you want to copy.
Copy the node, using one of these techniques:
Select Edit > Copy.
Right-click the node and select Copy.
Under the appropriate node, paste the copied node.
Paste the node using one of the following techniques:
Select the Edit > Paste or the Paste As Reference menu item.
Right-click the parent node and select Paste Node, and then select Paste or Paste As Reference.
In the same editing session, you can copy nodes from a virtual world in one virtual world 3D file to another virtual world in a different file. After you copy the nodes from one virtual world, select File > Open to open the second file where you want to paste the nodes.
To define the characteristics of an object, in the tree structure pane, select the appropriate property. At the bottom of the 3D World Editor, use the object properties edit pane to change property values. Then click Apply.
The tree structure pane shows the current property values, which reflect your edits.
When you enter a numeric field value in the 3D World Editor,
you can use MATLAB® expressions and MATLAB variables. For
example, to convert an angle from degrees to radians, enter a MATLAB expression
You can use the current camera position to specify interactively a viewpoint in the 3D World Editor.
Navigate to the position in the scene where you want the viewpoint.
In the tree structure pane, right-click
Select Copy values from current camera.
For objects that have a
URL field, to specify
a URL, select the node and use one of these approaches.
In the property edit box for the URL, enter the URL.
Select the 0 on the left side of the property edit box and click the Select File URL button. Navigate to the file.
To document a virtual world, in the object property edit pane, use the Comments tab for nodes and properties. Comments can help others understand the design of a virtual world.
Comments do not appear in the virtual world. They appear in
the virtual world 3D file, next to the given node or property, on
lines that begin with
You can display
in the 3D World Editor tree pane. Either click the Show
or select Tree > Show Events.
You can perform an
IS mapping for events
To expand a node in the tree structure pane, click the plus (+) sign to the left of the node. To collapse a node, click the minus (-) sign to the left of the node.
To expand or collapse all nodes in one step, select Tree > Expand All or Tree > Collapse All.
To expand subtrees within a node:
In the tree structure pane, right-click a node.
From the context menu, select Expand Subtree.
Alternative approaches for expanding the subtree for a node that you select in the tree structure pane are:
Select Tree > Expand Subtree.
Click the Expand Subtree toolbar button ( ).
To simplify the tree view, you can hide default values. Select Tree > Hide Default Values. To display default values, clear the Hide Default Values option.
To wrap contiguous nodes as children of another node:
Select the nodes. You can use the Shift key to select contiguous nodes, and the CTRL key to select discontiguous nodes.
Right-click the selected nodes and from the context menu, select Wrap By.
As an alternative, on the 3D World Editor menu bar, select Nodes > Wrap By.
From the list of nodes, select the node in which you want to wrap the selected nodes.
To delete one or more nodes, select the nodes and use one of these methods:
On the toolbar, click the red X button.
Click the Delete button.
Select Edit > Delete.
Right-click the node and select Delete.
From the Edit menu, you can also delete a specific child node or all the children nodes of a selected parent node, without deleting the parent node.
To cut a node and save it to the clipboard, select the node and use one of these techniques:
On the toolbar, click the scissors button.
Select Edit > Cut.
Right-click the node and select Cut.
You can save your virtual world files as virtual world using the File > Save or File > Save As menu items.
If you use the Save option, the 3D
World Editor renames the previous version of the file by appending
If you use the Save As option, the 3D World Editor saves the file using the new name that you specify. The file is saved in a form that the Simulink 3D Animation Viewer and 3D World Editor support (for example, the saved file preserves links to the library texture files).
Use the File > Export menu item to export a virtual world 3D file for use:
With other VRML or X3D tools
On different computers
In previous versions of the Simulink 3D Animation (previously the Virtual Reality Toolbox) product (for VRML files)
You cannot save an X3D file (
For exported files, the 3D World Editor copies referenced inlined
virtual world 3D files and texture files to the
It modifies the corresponding URLs for those files, so that they point
To add a VRML or X3D
In the Tree structure pane, select
Select the appropriate type of script, using the Node > Add > Common > Script menu.
Script interface elements:
Select the appropriate Add Interface Item menu option.
The following is an example of a
in the Tree structure pane.
url node, click the node and either
the Object property edit pane.