polyToSubdiv is undoable, queryable, and editable.
This command converts a polygon and produces a subd surface.
The name of the new subdivision surface is returned.
If construction history is ON, then the name of the new dependency
node is returned as well.
In query mode, return type is based on queried flag.
| Long name (short name) |
Argument types |
Properties |
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-absolutePosition(-ap)
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boolean
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If true, the possible blind data information that comes from the
polygon will be treated as absolute positions of the vertices,
instead of the relative offsets. You most likelly just want to
use the default of false, unless you know that the blind data
has the absolute positions in it.
Default: false
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-applyMatrixToResult(-amr)
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boolean
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If true, the matrix on the input geometry is applied to the object
and the resulting geometry will have identity matrix on it. If false
the conversion is done on the local space object and the resulting
geometry has the input object's matrix on it.
Default: true
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-caching(-cch)
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boolean
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Toggle caching for all attributes so that no recomputation is needed
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-maxEdgesPerVert(-me)
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int
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The maximum allowed valence for a vertex on the input mesh
Default: 32
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-maxPolyCount(-mpc)
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int
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The maximum number of polygons accepted on the input mesh.
Default: 1000
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-nodeState(-nds)
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int
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Maya dependency nodes have 6 possible states.
The Normal (0), HasNoEffect (1), and Blocking (2) states can be
used to alter how the graph is evaluated.
The Waiting-Normal (3), Waiting-HasNoEffect (4), Waiting-Blocking (5)
are for internal use only. They temporarily shut off parts of the graph during interaction
(e.g., manipulation). The understanding is that once the operation is done,
the state will be reset appropriately, e.g. Waiting-Blocking will reset
back to Blocking.
The Normal and Blocking cases apply to all nodes, while
HasNoEffect is node specific; many nodes do not support this option.
Plug-ins store state in the MPxNode::state attribute. Anyone can set
it or check this attribute. Additional details about each of these 3 states follow.
| State |
Description |
| Normal |
The normal node state. This is the default. |
| HasNoEffect |
The HasNoEffect option (a.k.a. pass-through), is used in cases where
there is an operation on an input producing an output of the same data type.
Nearly all deformers support this state, as do a few other nodes.
As stated earlier, it is not supported by all nodes.
It’s typical to implement support for the HasNoEffect state in
the node’s compute method and to perform appropriate operations.
Plug-ins can also support HasNoEffect.
The usual implementation of this state is to copy the input directly to the
matching output without applying the algorithm in the node. For deformers,
applying this state leaves the input geometry undeformed on the output.
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| Blocking |
This is implemented in the depend node base class and applies to all nodes.
Blocking is applied during the evaluation phase to connections.
An evaluation request to a blocked connection will return as failures,
causing the destination plug to retain its current value. Dirty propagation
is indirectly affected by this state since blocked connections are never cleaned.
When a node is set to Blocking the behavior is supposed to be the same as
if all outgoing connections were broken. As long as nobody requests evaluation
of the blocked node directly it won’t evaluate after that. Note that a blocked
node will still respond to getAttr requests but a getAttr on a
downstream node will not reevaluate the blocked node.
Setting the root transform of a hierarchy to Blocking won’t automatically
influence child transforms in the hierarchy. To do this, you’d need to
explicitly set all child nodes to the Blocking state.
For example, to set all child transforms to Blocking, you could use the
following script.
import maya.cmds as cmds
def blockTree(root):
nodesToBlock = []
for node in {child:1 for child in cmds.listRelatives( root, path=True, allDescendents=True )}.keys():
nodesToBlock += cmds.listConnections(node, source=True, destination=True )
for node in {source:1 for source in nodesToBlock}.keys():
cmds.setAttr( '%s.nodeState' % node, 2 )
Applying this script would continue to draw objects but things would not be animated.
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Default: kdnNormal
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-preserveVertexOrdering(-pvo)
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boolean
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Preserve vertex ordering in conversion
Default: true
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-quickConvert(-qc)
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boolean
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Debug flag to test the performance
Default: true
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-uvPoints(-uvp)
|
float float
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This is a cached uv point needed to transfer uv data associated with
finer level vertices (when switching between standard editing mode
and poly proxy mode.
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-uvPointsU(-uvu)
|
float
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U value of a cached uv point
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-uvPointsV(-uvv)
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float
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V value of a cached uv point
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-uvTreatment(-uvt)
|
int
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Treatment of Subd UVs when in proxy mode:
- 0 - preserve Subd UVs
- 1 - build Subd UVs from Poly UVs
- 2 - no UVs on Subd
Default: 0
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| Common flags |
-addUnderTransform(-aut)
|
boolean
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If true then add the new subdivision surface under the poly's transform.
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-constructionHistory(-ch)
|
boolean
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Turn the construction history on or off.
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-name(-n)
|
string
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Sets the name of the newly-created node. If it contains
namespace path, the new node will be created under the
specified namespace; if the namespace does not exist, it
will be created.
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-object(-o)
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boolean
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Create the result, or just the dependency node.
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