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hdlx/getCurveNormal.py

Last active March 5, 2021 12:38
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Revisions

  1. hdlx revised this gist Aug 23, 2019. No changes.
  2. hdlx revised this gist Aug 6, 2019. No changes.
  3. hdlx revised this gist Jan 18, 2018. No changes.
  4. hdlx created this gist Jan 18, 2018.
    17 changes: 17 additions & 0 deletions getCurveNormal.py
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    import maya.api.OpenMaya as om
    import maya.cmds as cmds

    #Returns normal, tangent, at a given point on a curve, given the curve and a position in space.
    #result as a list of openmaya MVector()
    def getCurveNormal(mayaCurve, pos=[0,0,0]):
    selectionList = om.MSelectionList()
    selectionList.add(mayaCurve)
    dPath= selectionList.getDagPath(0)
    mCurve=om.MFnNurbsCurve (dPath)
    res=mCurve.closestPoint(om.MPoint(om.MVector(pos)),space=om.MSpace.kWorld)
    point=om.MVector(res[0])
    param=res[1]
    n=mCurve.normal(param,space=om.MSpace.kWorld)
    t=mCurve.tangent(param,space=om.MSpace.kWorld)
    li=[n,t,point]
    return li