pymel.core.modeling.polyCut¶

polyCut(*args, **kwargs)¶

This command splits a mesh, or a set of poly faces, along a plane. The position and orientation of the plane can be adjusted using the appropriate flags listed above. In addition, the cut operation can also delete the faces lying on one side of the cutting plane, or extract those faces by an offset amount.

Flags:

Long Name / Short Name		Argument Types	Properties
caching / cch		bool
	Toggle caching for all attributes so that no recomputation is needed
constructionHistory / ch		bool
	Turn the construction history on or off (where applicable). If construction history is on then the corresponding node will be inserted into the history chain for the mesh. If construction history is off then the operation will be performed directly on the object. Note:If the object already has construction history then this flag is ignored and the node will always be inserted into the history chain.
cutPlaneCenter / pc		float, float, float
	The position of the cutting plane. Default:0.0, 0.0, 0.0
cutPlaneCenterX / pcx		float
	Cutting plane center X coord.
cutPlaneCenterY / pcy		float
	Cutting plane center Y coord.
cutPlaneCenterZ / pcz		float
	Cutting plane center Z coord.
cutPlaneHeight / ph		float
	The height of the cutting plane
cutPlaneRotate / ro		float, float, float
	The orientation of the cutting plane. Default:0.0, 0.0, 0.0
cutPlaneRotateX / rx		float
	cutting plane X rotate angle.
cutPlaneRotateY / ry		float
	cutting plane Y rotate angle.
cutPlaneRotateZ / rz		float
	cutting plane Z rotate angle.
cutPlaneSize / ps		float, float
	The width and the height of the cutting plane Default:1.0, 1.0
cutPlaneWidth / pw		float
	The width of the cutting plane
cuttingDirection / cd		unicode
	This flag specifies the direction of the cutting plane. Valid values are x, y, zA value of xwill cut the object along the YZ plane cutting through the center of the bounding box. A value of ywill cut the object along the ZX plane cutting through the center of the bounding box. A value of zwill cut the object along the XY plane cutting through the center of the bounding box.
deleteFaces / df		bool
	whether to delete the one-half of the cut-faces of the poly. If true, they are deleted. Default:false
extractFaces / ef		bool
	whether to extract the cut-faces of the poly into a separate shell. If true, they are extracted. Default:false
extractOffset / eo		float, float, float
	The displacement offset of the cut faces. Default:0.5, 0.5, 0.5
extractOffsetX / eox		float
	The X-displacement offset of the cut faces.
extractOffsetY / eoy		float
	The Y-displacement offset of the cut faces.
extractOffsetZ / eoz		float
	The Z-displacement offset of the cut faces.
frozen / fzn		bool
name / n		unicode
	Give a name to the resulting node.
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-Blockingwill reset back to Blocking. The Normaland Blockingcases apply to all nodes, while HasNoEffectis node specific; many nodes do not support this option. Plug-ins store state in the MPxNode::stateattribute. Anyone can set it or check this attribute. Additional details about each of these 3 states follow. StateDescriptionNormalThe normal node state. This is the default.HasNoEffectThe HasNoEffectoption (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. Its typical to implement support for the HasNoEffectstate in the nodes 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. BlockingThis is implemented in the depend node base class and applies to all nodes. Blockingis 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 Blockingthe 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 wont evaluate after that. Note that a blocked node will still respond to getAttrrequests but a getAttron a downstream node will not reevaluate the blocked node. Setting the root transform of a hierarchy to Blockingwont automatically influence child transforms in the hierarchy. To do this, youd need to explicitly set all child nodes to the Blockingstate. 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
onObject / oo		bool
	whether to act on the entire polyObject or its selected face components Default:true
worldSpace / ws		bool
	This flag specifies which reference to use. If on: all geometrical values are taken in world reference. If off: all geometrical values are taken in object reference. C: Default is off. Q: When queried, this flag returns an int. Flag can have multiple arguments, passed either as a tuple or a list.

Derived from mel command maya.cmds.polyCut

Example:

import pymel.core as pm

# Introduce new edges at the middle of a cylinder
#
pm.polyCylinder( r=1, h=2, sx=20, sy=1, sz=1, ax=(0, 1, 0), cuv=1, ch=1, name='pCylA' )
pm.polyCut( 'pCylA.f[0:59]', cd='Y', ch=1 )

# Delete the bottom half of the cylinder
#
pm.select( cl=True )
pm.polyCylinder( r=1, h=2, sx=20, sy=1, sz=1, ax=(0, 1, 0), cuv=1, ch=1, name='pCylB' )
pm.move( 3, 0, 0, r=True )
pm.polyCut( 'pCylB.f[0:59]', cd='Y', df=1, ch=1 )
pm.select( cl=True )


# Split the bottom half of the cylinder
#
pm.select( cl=True )
pm.polyCylinder( r=1, h=2, sx=20, sy=1, sz=1, ax=(0, 1, 0), cuv=1, ch=1, name='pCylC' )
pm.move( 6, 0, 0, r=True )
pm.polyCut( 'pCylC.f[0:59]', cd='Y', ef=1, ch=1 )

# select one of the cylinders, and select the polyCut node from the
# channel box, and enter the showManipulator Tool, on the Toolbar.
# You can interactively place the cutting plane, and the result of
# cut operation will adjust accordingly.