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Synopsis

rebuildSurface [-caching boolean] [-constructionHistory boolean] [-degreeU int] [-degreeV int] [-direction int] [-endKnots int] [-fitRebuild int] [-keepControlPoints boolean] [-keepCorners boolean] [-keepRange int] [-name string] [-nodeState int] [-object boolean] [-polygon int] [-rebuildType int] [-replaceOriginal boolean] [-spansU int] [-spansV int] [-tolerance linear] surface [surface]

rebuildSurface is undoable, queryable, and editable.

This command rebuilds a surface by modifying its parameterization. In some cases the shape of the surface may also change. The rebuildType (-rt) attribute determines how the surface is rebuilt.

The optional second surface can be used to specify a reference parameterization.

Return value

string[]Object name and node name

In query mode, return type is based on queried flag.

Flags

caching, constructionHistory, degreeU, degreeV, direction, endKnots, fitRebuild, keepControlPoints, keepCorners, keepRange, name, nodeState, object, polygon, rebuildType, replaceOriginal, spansU, spansV, tolerance
Long name (short name) Argument types Properties
-caching(-cch) boolean createqueryedit
Toggle caching for all attributes so that no recomputation is needed
-degreeU(-du) int createqueryedit
The degree of the resulting surface in the u direction 0 - maintain current, 1 - linear, 2 - quadratic, 3 - cubic, 5 - quintic, 7 - heptic
Default: 3
-degreeV(-dv) int createqueryedit
The degree of the resulting surface in the v direction 0 - maintain current, 1 - linear, 2 - quadratic, 3 - cubic, 5 - quintic, 7 - heptic
Default: 3
-direction(-dir) int createqueryedit
The direction in which to rebuild: 0 - U, 1 - V, 2 - Both U and V
Default: 2
-endKnots(-end) int createqueryedit
End conditions for the surface 0 - uniform end knots, 1 - multiple end knots,
Default: 0
-fitRebuild(-fr) int createqueryedit
Specify the type of rebuild method to be used: 0 - Convert Classic, the default and original convert method. 1 - Fit using the least squares fit method. 2 - Convert Match, alternate matching convert method. 3 - Convert Grid, uses a grid-based fit algorithm.
Default: 0
-keepControlPoints(-kcp) boolean createqueryedit
Use the control points of the input surface. This forces uniform parameterization unless rebuildType is 2 (match knots)
Default: false
-keepCorners(-kc) boolean createqueryedit
The corners of the resulting surface will not change from the corners of the input surface.
Default: true
-keepRange(-kr) int createqueryedit
Determine the parameterization for the resulting surface. 0 - reparameterize the resulting surface from 0 to 1; 1 - keep the original surface parameterization; 2 - reparameterize the result from 0 to number of spans
Default: 1
-nodeState(-nds) int createqueryedit

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.

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.


Default: kdnNormal
-rebuildType(-rt) int createqueryedit
The rebuild type: 0 - uniform, 1 - reduce spans, 2 - match knots, 3 - remove multiple knots, 4 - force non rational 5 - rebuild ends 6 - trim convert (uniform) 7 - into Bezier mesh
Default: 0
-spansU(-su) int createqueryedit
The number of spans in the u direction in resulting surface. Used only when rebuildType is 0 - uniform. If 0, keep the same number of spans as the original surface.
Default: 4
-spansV(-sv) int createqueryedit
The number of spans in the v direction in resulting surface. Used only when rebuildType is 0 - uniform. If 0, keep the same number of spans as the original surface.
Default: 4
-tolerance(-tol) linear createqueryedit
The tolerance with which to rebuild
Default: 0.01
Common flags
-constructionHistory(-ch) boolean create
Turn the construction history on or off.
-name(-n) string create
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.
-object(-o) boolean create
Create the result, or just the dependency node.
-polygon(-po) int create
The value of this argument controls the type of the object created by this operation
  • 0: nurbs surface
  • 1: polygon (use nurbsToPolygonsPref to set the parameters for the conversion)
  • 2: subdivision surface (use nurbsToSubdivPref to set the parameters for the conversion)
  • 3: Bezier surface
  • 4: subdivision surface solid (use nurbsToSubdivPref to set the parameters for the conversion)
-replaceOriginal(-rpo) boolean create
Create "in place" (i.e., replace).
Flag can appear in Create mode of command Flag can appear in Edit mode of command
Flag can appear in Query mode of command Flag can be used more than once in a command.

MEL examples

// rebuild the surface using uniform parameterization
// The rebuilt surface will have 5 spans in u and
// 10 spans in v
rebuildSurface -rt 0 -dir 2 -su 5 -sv 10;

// rebuild the surface by removing its redundant spans
rebuildSurface -rt 1;

// rebuild the surface by matching the u parameterization
// of another surface. surface1 is the surface to rebuild
// surface2 is the reference surface
rebuildSurface -rt 2 -dir 0 surface1 surface2;

// rebuild the surface by removing all multiple interior knots
rebuildSurface -rt 3;

// rebuild the surface using uniform parameterization
rebuildSurface -rt 4;