pymel.core.modeling.angleBetween

angleBetween(*args, **kwargs)

Returns the axis and angle required to rotate one vector onto another. If the construction history (ch) flag is ON, then the name of the new dependency node is returned.

Flags:

Long name (short name)		Argument Types	Properties
caching (cch)		bool
constructionHistory (ch)		bool
	Turn construction history on or off. If true, a dependency node will be created and its name is returned. Default:false Flag can have multiple arguments, passed either as a tuple or a list.
euler (er)		bool
	return the rotation as 3 Euler angles instead of axis + angle
name (n)		unicode
nodeState (nds)		int
vector1 (v1)		float, float, float
	vector to compute the rotation from
vector1X (v1x)		float
vector1Y (v1y)		float
vector1Z (v1z)		float
vector2 (v2)		float, float, float
	vector to compute the rotation to
vector2X (v2x)		float
vector2Y (v2y)		float
vector2Z (v2z)		float

Derived from mel command maya.cmds.angleBetween

Example:

import pymel.core as pm

# To find the euler angle between these two vectors. The result is three
# angles in the current angular unit. In this example, the first vector
# must be rotated -63.434949 degrees about the X axis, 16.60155 degrees
# about the Y axis and -26.565051 degrees about the Z axis to achieve
# the second vector.

pm.angleBetween( euler=True, v1=(0.0, 1.0, 2.0), v2=(1.0, 2.0, 0.0) )
# Result: [-63.434948822922017, 16.601549599020235, -26.565051177077994] #

# To find the angle between these two vectors.  The result is an axis and
# an angle (in the current angular unit).  In this example, the first
# vector must be rotated 66.421822 degrees about the axis
# (-0.8728716, 0.4364358, -0.2182179) to achieve the second vector.

pm.angleBetween( v1=(0.0, 1.0, 2.0), v2=(1.0, 2.0, 0.0) )
# Result: [-0.87287156094396978, 0.43643578047198489, -0.21821789023599245, 66.421821521798165] #

# How to create a dependency node that calculates the angle between two
# vectors. This example shows how the (x,z) position of a sphere
# can be used to control the rotate factors (about y) of a cone shape.

angleBtwnNode = pm.angleBetween(v1=(1, 0, 0), v2=(1, 0, 0), ch=True)
sphere = pm.sphere()
pm.move( 5, 0, 5, sphere[0] )
pm.connectAttr( sphere[0]+'.translateX', angleBtwnNode+'.vector2X' )
pm.connectAttr( sphere[0]+'.translateZ', angleBtwnNode+'.vector2Z' )

cone = pm.cone( ch=False )
convert = pm.createNode( 'unitConversion' )
pm.connectAttr( angleBtwnNode+'.eulerY', convert+'.input' )
pm.connectAttr( convert+'.output', cone[0]+'.rotateY' )