detachSurface

Go to: Synopsis. Return value. Flags. MEL examples.

Synopsis

detachSurface [-caching boolean] [-constructionHistory boolean] [-direction int] [-keep boolean] [-name string] [-nodeState int] [-object boolean] [-parameter float] [-replaceOriginal boolean] surface

detachSurface is undoable, queryable, and editable.

You can only detach in either U or V (not both) with a single detachSurface operation.

You can use this command to open a closed surface at a particular parameter value. You would use this command with only one "-p" flag.

If you are specifying "-k" flags, then you must specify one, none or all "-k" flags. If you are specifying all "-k" flags, there must be one more "-k" flag than "-p" flags.

Return value

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

Flags

Long name (short name)	Argument types	Properties
-caching(-cch)	boolean
Toggle caching for all attributes so that no recomputation is needed
-direction(-d)	int
Direction in which to detach: 0 - V direction, 1 - U direction Default: 1
-keep(-k)	boolean
Keep the detached pieces. Default: true
-nodeState(-nds)	int
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
-parameter(-p)	float
Parameter at which to detach. Default: 0.0
Common flags
-constructionHistory(-ch)	boolean
Turn the construction history on or off.
-name(-n)	string
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 the result, or just the dependency node.
-replaceOriginal(-rpo)	boolean
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

detachSurface -ch on -d 1 -p 0.3 -rpo off surface1;
detachSurface -ch on surface1.u[0.3];
// Detaches surface1 into two pieces at u = 0.3.
// The results are two surface pieces, and a detachSurface dependency node.
// Since no "-keep" flag is used, all pieces are kept.

detachSurface -ch on -k on -k off -rpo off -p 0.34 -d 0 surface1;
detachSurface -ch on -k on -k off -rpo off surface1.v[0.34];
// Detaches surface1 at v = 0.34.  Because of the "-k" flags, two
// surfaces are created but the second surface is empty.  A
// detachSurface dependency node is also returned.

detachSurface -ch on -rpo on -p 0.2 -p 0.5 -d 1 surface1;
detachSurface -ch on -rpo on surface1.u[0.2] surface1.u[0.5];
// Detaches surface1 into three pieces.  Because of the "-rpo" flag,
// the first surface piece is used to replace the original surface1.
// The results are the three surfaces (including the original surface).
// Even though the "-ch" flag is on, a dependency node is not created
// if surface1 is not a result of construction history.  If surface1
// is the result of construction history, then a dependency node is
// created and its name is returned.

detachSurface -ch on -d 0 -p 0.3 -rpo off cylinder1;
// Detaches cylinder1, which is periodic in V, where the V parameter
// ranges between 0.0 and 8.0.  The parameter, 0.3, is used to move
// the start point of the cylinder, also known as the "seam".
// The resulting surface's V parameter range is 0.0 to 0.3.

detachSurface -ch on -d 0 -p 0.3 -p 0.7 -rpo off cylinder1;
// Detaches cylinder1, which is periodic in V, where the V parameter
// ranges between 0.0 and 8.0.  The 1st parameter, 0.3, is used to move
// the start point of the cylinder, also known as the "seam".
// The second parameter, 0.7, is used to detach the cylinder again.
// The result is only TWO surfaces; the first surface's V parameter ranges
// from 0.0 to 0.3. The second surface's V parameter ranges from 0.3 to 0.7.