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Patch Select M odif ier 743
Optimize group
Adjusts the degree of optimization.
Face Thresh—Sets the threshold angle u sed
to determine which faces are collapsed. Low
values produce less optimization but better
approximations of the original shape. Higher
values improve optimization, but are more likely
to result in faces that render poorly (see Bias).
Default=4.0.
Edge Thresh—Sets a d ifferent threshold angle for
open edges (those that bound only one face). A
low value preser ves open edges. At the same time
you can apply a high face threshold to get good
optimization. Default=1.0.
Bias—Helps eliminate the skinny or degenerate
triangles that occur during optimization, which
can c ause rendering artifacts. Higher values keeps
triangles f rom becoming degenerate. The default
of 0.1 is enough to eliminate the sk inniest tri angles.
Range=0.0 to 1.0 (a 0 value turns Bias off).
Max Edge Len—Specifies the maximum length,
beyond which an edge cannot be stretched when
optimized. When Max Edge Len is 0, it has no
effect. Any value greater than 0 specifie s the
maximum length of the edges. Default=0.0.
Along with Bias, this control helps you avoid
creating long skinny faces while optimizing.
Auto Edge—Tur ns e dges on and off fol low i ng
optimization. Turns on any open edges. Turns
off any edges between faces whose normals are
w ithin the face threshold; such edges beyond the
threshold are not turned on. Default=off.
Preserve group
Maintains clean separation at the face level
between material and smoothness boundaries.
Material Boundaries—Prevents face collapse across
material boundaries. Default=off.
Smooth B ounda r ies—Optimizes an object and
maintain its smoothing. When t urned on, allows
only faces that share at least one smoothing group
to collapse. Default=off.
Update group
Update—Updates the viewports with the current
optimization sett ings. Available only when Manual
Update is turned on.
Manua l Update—Enables the Up date button. When
turnedoff,Optimizeworksasitdoesbydefault,
updating the viewport display dynamically.
Note: When using Manual Update, if you make any
changes that cause the reevaluation of the stack,
the existing optimization display disappears. Click
theUpdatebuttonagaintorestoreit.
TheRendererignorestheoptimizationdisplay
in the viewport, u s ing the Optimize settings,
regardless of the state of the Manual Update.
Last Optimize Status group
Displays numerical results of optimization with
exact before-and-after counts for vertices and
faces.
Pa tch S el ect M od if i er
Make a selection. > Modify panel > Modifier List > Patch
Select
Make a selection. > Modifiers menu > Selection Modifiers
>PatchSelect
The Patch Select modifier lets you pass a sub-object
selection up the stack to subsequent mod ifiers.
It provides a superset of the selection functions
available in the
Edit Patch modifier (page 1–617) .
You can select vert ices, edges, patches, and
elements. You can also change the selection from
sub-object level to object level.