
15
UNDERSTANDING
geometry
Alias represents almost all items in its universe as parts of a hierarchy of objects and
groups. Each end block, which represents geometry, is a node, as are all other blocks that
make up the hierarchy. Nodes may be combined with other nodes to form more complex
objects, and sub-groups can be part of larger su/jointfilesconvert/449563/bgroups that are, in turn, part of even
larger groups of objects. Each node can have additional information associated with it for
transformation and animation purposes.
You can see how this hierarchy of objects is represented in the Object Lister and the Scene
Block Diagram (SBD) window.
The Object Lister and the SBD window are very useful for selecting data, organizing,
grouping, ungrouping, and assigning to layers or assigning shaders.
The top node is an object. All
other nodes are components.
The color of this swatch
shows the object’s layer.
A green leaf node shows
the geometry has
construction history.
A blue leaf node shows the geometry
does not have construction history
These three leaf nodes
are specic to the camera.
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