pymel.core.modeling.curveIntersect¶

curveIntersect(*args, **kwargs)¶

You must specify two curves to intersect. This command either returns the parameter values at which the given pair of curves intersect, or returns a dependency node that provides the intersection information. If you want to find the intersection of the curves in a specific direction you must use BOTH the -useDirectionflag and the directionflag.

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.
direction / d		float, float, float
	The direction that the input curves are projected in before intersecting. This vector is only used if useDirectionflag is true.
directionX / dx		float
	The X component of the direction that the input curves are projected in before intersecting. This vector is only used if useDirectionflag is true.
directionY / dy		float
	The Y component of the direction that the input curves are projected in before intersecting. This vector is only used if useDirectionflag is true.
directionZ / dz		float
	The Z component of the direction that the input curves are projected in before intersecting. This vector is only used if useDirectionflag is true.
frozen / fzn		bool
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
tolerance / tol		float
	The tolerance that the intersection is calculated with. For example, given two curves end-to-end, the ends must be within tolerance for an intersection to be returned. Default:0.001
useDirection / ud		bool
	If true, use direction flag. The input curves are first projected in a specified direction and then intersected. If false, this command will only find true 3D intersections. Default:false Flag can have multiple arguments, passed either as a tuple or a list.

Derived from mel command maya.cmds.curveIntersect

Example:

import pymel.core as pm

pm.curveIntersect( 'curve1', 'curve2' )
# Returns the parameter values that the curves intersect at.
# eg. if 6 parameter values are returned, the first 3 are
# on curve1 and the last 3 are on curve2.


pm.curveIntersect( 'curve1', 'curve2', useDirection=True, direction=(0, 1, 0) )
# Returns the parameter values that the curves intersect at
# when projected along vector (0, 1, 0).  This is useful
# for example when you are viewing the two curves in an orthographic
# view and the curves appear to intersect, even though
# they do not intersect in 3D.

node = pm.curveIntersect('curve1', 'curve2', ch= True)
p1 = pm.getAttr(node + ".parameter1" )   # or use ".p1"
p2 = pm.getAttr(node + ".parameter2" )   # or use ".p2"
# Returns a string which is the name of a new curveIntersect
# dependency node.
# The "getAttr" commands return the parameter values at
# which the curves intersect each other.