def get_nurb_obj_knot_data_old(curve_obj=None):
"""
get the knot information from nurbsCurves.
Maya returns 2 knots less than it should.
:param curve_obj: <OpenMaya.MObject> nurbsCurve object.
:return: <tuple> array of curve knot data.
"""
curve_fn = object_utils.get_fn(curve_obj)
number_of_knots = curve_fn.numKnots()
knots = ()
# invent the first knot value for a clamped or periodic curve
if curve_fn.knot(1) - curve_fn.knot(0) < 0.01:
knots += curve_fn.knot(0),
else:
knots += curve_fn.knot(0) - 1,
# write the rest of the knots
for i in xrange(number_of_knots):
knots += curve_fn.knot(i),
# invent the last knot value
if curve_fn.knot(1) - curve_fn.knot(0) < 0.01:
knots += curve_fn.knot(number_of_knots - 1),
else:
knots += curve_fn.knot(number_of_knots - 1) + 1,
return knots
def get_nurb_obj_curve_order(curve_obj=None):
"""
get the curve information: degree.
:param curve_obj: <OpenMaya.MObject> nurbsCurve object.
:return: <int> form.
"""
curve_fn = object_utils.get_fn(curve_obj)
return curve_fn.degree() + 1
def get_nurb_obj_knot_data(curve_obj=None):
"""
get the knot information from nurbsCurves.
Maya returns 2 knots less than it should.
:param curve_obj: <OpenMaya.MObject> nurbsCurve object.
:return: <tuple> array of curve knot data.
"""
curve_fn = object_utils.get_fn(curve_obj)
knot_array = OpenMaya.MDoubleArray()
curve_fn.getKnots(knot_array)
return list(knot_array)
def get_nurb_obj_cv_data(curve_obj=None):
"""
get all points associated with the nurbs curve.
:param curve_obj: <OpenMaya.MObject> nurbsCurve object.
:return: <tuple> array of curve CV's.
"""
curve_fn = object_utils.get_fn(curve_obj)
cvs = OpenMaya.MPointArray()
curve_fn.getCVs(cvs)
return_data = ()
for i in range(cvs.length()):
return_data += (i, cvs[i].x, cvs[i].y, cvs[i].z),
return return_data
def get_nurb_obj_curve_form(curve_obj=None):
"""
get the curve information: form.
kOpen :: the curve end and start CVs do not meet.
kClosed :: the curve end and start CVs meet but is not continuous.
kPeriodic :: the end points of the CVs meet and continuity is maintained.
:param curve_obj: <OpenMaya.MObject> nurbsCurve object.
:return: <dict> {<int>: <str>}.
"""
curve_fn = object_utils.get_fn(curve_obj)
form_int = curve_fn.form()
if form_int == 1:
return {form_int: 'kOpen'}
if form_int == 2:
return {form_int: 'kClosed'}
if form_int == 3:
return {form_int: 'kPeriodic'}
def get_nurb_obj_edit_points(curve_obj=None):
"""
gets the data on nurbs objects' edit points.
:param curve_obj: <OpenMaya.MObject>
:return: <tuple> edit point data.
"""
curve_fn = object_utils.get_fn(curve_obj)
knots = get_nurb_obj_knot_data(curve_obj)
edit_pts_data = ()
edit_pnt = OpenMaya.MPoint()
for u in knots:
try:
curve_fn.getPointAtParam(u, edit_pnt, OpenMaya.MFn.kWorld)
edit_pts_data += (edit_pnt.x, edit_pnt.y, edit_pnt.z),
except RuntimeError:
continue
return edit_pts_data