Getting a curve's mid point in worldspace?

[jmalaska]

I'm having difficulty finding a way to get a transform for the middle spot on a curve. I haven't gone as far as rebuilding the curve evenly with a ton of points evenly to get the middle, as that seems a bit overkill and I need to do this on thousands of curves. The commands curve and curvePoint don't seem to have the flags to get this midpoint.

Is anyone aware of a way to do this in one call?

[zewt · Accepted solution]

If you want the point halfway along the curve, you need to convert the distance along the curve to the curve param, and then get the position of that param:

import pymel.core as pm

def go():
    # Get the MFnCurve for the shape node (do this however you want):
    node = pm.PyNode('curve1').getShape()
    curve = node.__apimfn__()
    
    # Get the curve param halfway along the length:
    length = curve.length()
    param = curve.findParamFromLength(length/2)
    
    # Get the world space position:
    p = om.MPoint()
    curve.getPointAtParam(param, p, om.MSpace.kWorld)

    # Sample output:
    loc = pm.createNode('locator').getTransform()
    pm.xform(loc, ws=True, t=(p.x, p.y, p.z))
    
go()

[jmalaska]

Thanks @zewt this is exactly what I was looking for. Cheers!