2010

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6 Click-drag the bottom edge of the multi-sided polygon and slide the
vertex to the right end of the edge (see image).
7 Press the y key to split the face.
Your multi-sided face is now split into three four-sided faces, maintaining
the overall quad topology on the helmet mesh.
8 Press the q key to exit the Split Polygon Tool.
Deleting construction history
Maya keeps track of the options, attribute settings, and transformations made
to an object via its construction history. Construction history is useful when
youre working on a surface and want to edit an attribute from an earlier stage
of the models development.
The simplest way to access the construction history for an object is via its
various input nodes in the Channel Box or via the Attribute Editor. Selecting
an input node displays the attributes associated with that particular
modification to the object. You then edit the attributes on that node as
required and the surface updates.
For example, the input nodes for the helmet mesh include: polyCreateFace,
polyCube, polyExtrudeFace, polySmoothFace, polyMoveVertex, polyUnite,
and so on. You can associate the steps in creating the helmet mesh with nodes
that are related to a particular stage of its construction history.
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