Game Development Reference
In-Depth Information
Every node in a scene has a parent except the topmost node, in other words, the root node.
See
Figure 11-2
.
Figure 11-2
.
Scene nodes
Nodes that contain other child nodes are considered
group nodes
. In
Figure 11-2
,
you can
see a parent node and several child nodes.
Node trees (group nodes) are what appear in the scene. Node positions are
defined in the coordinate system defined by its parent node.
Leaf nodes are the ones that are actually rendered. These execute the anima-
tion and specify the material and lighting for the node tree.
Scene Kit Editor
Xcode provides a special editor similar to Interface Builder that is used to edit your Col-
lada files by manipulating the scene graph, as shown in
Figure 11-3
.
