The bigger the level becomes, the more objects there will be within it, which leads to a high chance of things getting cluttered and confused. The layer system is an easy way to keep objects organized.
The grouping system is another way to control multiple objects as a single group.
Linking allows you to create parent/child links between the objects, passing down changes through the hierarchy.
Grouping objects are very useful for manipulating several objects as one, single entity.
To create a group, you must first select the objects that you want in the group. You can do this by dragging a selection box around them, or by selecting them individually by holding CTRL key.
One important thing to remember about groups is that once an object is within a closed group, it cannot be independently edited; therefore, make sure that the objects have been set up beforehand.
To create a group, on the Group menu, click Group. The following dialog box will be displayed:
After the objects have been grouped, a bounding box will be displayed around the group, with a group-specific pivot point.
This will revert all objects in the group back to their individual state.
This function allows you to open a group and edit each individual object within it, without un-grouping the grouped objects.
This option allows you to add another object (including other groups) to the desired group. Select the object you wish to attach, right-click and select Add To option, now select the group that you want the object to be associated with.
You can also use Level->Group->Attach to option to add an object to the group. To avoid any confusion, always remember that if you activate the Attach/Add to function, the next object you click must be a group.
This option removes the selected object from its group. To select an object within a group, you must first open the group using the Open button from the Properties Panel. Once you have the object selected, right-click and select Detach option to remove the object from the group.
Saving Grouped Objects
To save the group to an external file, go to the Level Menu section of the toolbar and then select Export Selected Object(s). To load in a previously saved group, on the same menu, use Asset Browser.
Linking an Entity object to another will create a parent-child connection between the two objects.
Physical changes such as position, rotation, and scale to the parent object are propagated to any child objects. This link works in one direction only; changing the child will not affect the parent.
Link and Unlink can be found in the Level menu.
These options can also be found on the main icon bar. The icon to the left is to Link, the right one is to Unlink.
To link two objects, click Link, and then click and hold down the mouse pointer on the child object. Next, move the mouse pointer to the intended parent object and release the mouse button.
By clicking Unlink on the child object, all links and dependencies will be removed.
In the example below, we'll link the Child object (Pyramid on the left) to the Parent object (Sphere on the right).
Activate the link button, left click on the Child object, drag your mouse over to the Parent object, let go of the left mouse button.
|Red Line Represents Link In Progress||Blue Line Represents Link Completed|
|Child object can be moved independently of Parent||Moving Parent object also moves Child|