pymel.core.modeling.blend2¶

blend2(*args, **kwargs)¶

This command creates a surface by blending between given curves. This is an enhancement (more user control) compared to blend which is now obsolete.

Flags:

Long Name / Short Name		Argument Types	Properties
autoAnchor / aa		bool
	If true and both paths are closed, automatically determine the value on the right rail so that they match Default:true
autoNormal / an		bool
	If true, the direction of each starting tangent is computed based on given geometry. Default:true
caching / cch		bool
	Toggle caching for all attributes so that no recomputation is needed
constructionHistory / ch		bool
	Turn the construction history on or off.
crvsInFirstRail / cfr		int
	Number of curves in the first rail of the blend.
flipLeftNormal / fln		bool
	If true, flip the starting tangent off the left boundary. Default:false
flipRightNormal / frn		bool
	If true, flip the starting tangent off the right boundary. Default:false
frozen / fzn		bool
leftAnchor / la		float
	The reference parameter on the left boundary where the blend surface starts in the case of the closed rail. Default:0.0
leftEnd / le		float
	The reference parameter on the left boundary where the blend surface ends. Default:1.0
leftStart / ls		float
	The reference parameter on the left boundary where the blend surface starts. Default:0.0
multipleKnots / mk		bool
	If true, use the new blend which produces fully multiple interior knots Default:true
name / n		unicode
	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.
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
object / o		bool
	Create the result, or just the dependency node.
polygon / po		int
	The value of this argument controls the type of the object created by this operation 0: nurbs surface1: polygon (use nurbsToPolygonsPref to set the parameters for the conversion)2: subdivision surface (use nurbsToSubdivPref to set the parameters for the conversion)3: Bezier surface4: subdivision surface solid (use nurbsToSubdivPref to set the parameters for the conversion)Flag can have multiple arguments, passed either as a tuple or a list.
positionTolerance / pt		float
	The positional C(0) tolerance of the blend surface to the adjacent surfaces. Default:0.1
reverseLeft / rvl		bool
	If true, reverse the direction off the left boundary. autoDirection must be false for this value to be considered. Default:false
reverseRight / rvr		bool
	If true, reverse the direction of the right boundary. autoDirection must be false for this value to be considered. Default:false
rightAnchor / ra		float
	The reference parameter on the right boundary where the blend surface starts in the case of the closed rail. Default:0.0
rightEnd / re		float
	The reference parameter on the right boundary where the blend surface ends. Default:1.0
rightStart / rs		float
	The reference parameter on the right boundary where the blend surface starts. Default:0.0
tangentTolerance / tt		float
	The tangent G(1) continuity tolerance of the blend surface to the adjacent surfaces. Default:0.1 Common flags

Derived from mel command maya.cmds.blend2

Example:

import pymel.core as pm

# Do blend with auto normal and with no history:
pm.blend2( an=True, ch=False )

# Do blend without auto normal
pm.blend2( an=False, fln=True, frn=True )