9

Geometry Rollout (Patch) 989
When you attach a n object, the materials of the
two objects are combined in the following way:
• If the object being attached does not have a
material assigned, it inherits the material of the
object it is being attached to.
• Likewise if the object you’re attaching to doesn’t
have a material, it in herits the material of the
object being attached.
• If b oth objects have materials, the resulting new
material is a multi/sub-object material (page
2–1594) that encompasses the input materials.
A dialog appears offering three methods of
combining the objects’ materials and material
IDs. For more information, see Attach Options
Dialog (page 1–1018).
Attach remains active in all sub-object modes, but
always applies to objects.
Top: Original patch object with rendering
Bottom: Rendering with another patch attached
Reorient—When on, reorients the attached element
so that each patch’s creation local coordinate
system is alig ned with t he creation local coordinate
system of the selected patch.
Delete (V er tex , Edge, Pa tch, and E lement lev els
only )—
Deletes the selected sub-objects.
Wa rn in g : Delete vertices or edges with caution.
Deleting a vertex or edge also deletes the patches that
share them. For example, if you delete the single vertex
at the top of a spherical patch, the top four patches are
also deleted.
Br ea k (V er tex a nd Edge level s only )—
For vertices,
breaks a vertex into multiple ver tices. Use this
ifyouneedtosplitopenanedgetoaddanother
patch or for general modeling operations. Select
a vertex, and then click Break. After the break,
select the individual vertices and move them to
separate the edges.
For edges, splits an edge. Use this if you need
to split open an edge for general modeling
operations. Select one or more edges, and then
click Break. After the break, move the handles of
adjacen t vertices to create a gap in the pa tch.
Hide (V er tex , E dge, Pa tch, a nd El ement lev els
only )—
Hides the selected sub-objects. For vertices
and edges, Hide a lso hides the patches that are
attached to them.
Note: At least one patch in the object must remain
vi sible.
Unhide Al l—Restores any hidden sub-objects to
visibility.
Weld group (Vertex and Edge levels only)
Selected—Welds selected vertices that fall within
the tolerance specified in the Weld Threshold
spinner (to the right of the Weld button). Select
the vertices you want to weld between two different
patches, set t he spinner to a sufficient distance,
and click Selected.
At the Edge sub-object level, clicking Selected
welds two edges that share vertices. You can use
this to eliminate gaps on a surface.