Thanks for sharing!
On 15 April 2016 at 19:18, Paxton <[email protected]> wrote:
> Ok, I figured it out..
> You need to create a 2d transform (with surface as parent)
>
> heres how:
>
> import maya.OpenMaya as om
>
> #transform!
> t = om.MFnDagNode().create('transform', 'i_am_a_3d_thing')
>
> #Plane!
> point_array = om.MPointArray()
> point_array.append(om.MPoint(*[-1.0,0.0,-1.0]))
> point_array.append(om.MPoint(*[1.0,0.0,-1.0]))
> point_array.append(om.MPoint(*[-1.0,0.0,1.0]))
> point_array.append(om.MPoint(*[1.0,0.0,1.0]))
>
> knot_aray_u = om.MDoubleArray()
> knot_aray_u.append(0)
> knot_aray_u.append(1)
> knot_aray_v = om.MDoubleArray()
> knot_aray_v.append(0)
> knot_aray_v.append(1)
> degree_u = 1
> degree_v = 1
> form_u = 1
> form_v = 1
> rational = False
>
> s = om.MFnNurbsSurface().create(point_array, knot_aray_u, knot_aray_v,
> degree_u, degree_v, form_u, form_v, rational, t)
>
>
> #Curve!
>
> point_array = om.MPointArray()
> point_array.append(om.MPoint(*[0.0, 0.0]))
> point_array.append(om.MPoint(*[1.0, 1.0]))
>
> knot_aray = om.MDoubleArray()
> knot_aray.append(0)
> knot_aray.append(1)
>
>
> #2d Transform!
> t2 = om.MFnDagNode().create('transform', 'i_am_a_2d_thing', s)
>
>
>
> curve = om.MFnNurbsCurve().create(point_array, knot_aray, degree_u,
> form_u, True, False, t2)
>
> On Thursday, 14 April 2016 23:14:58 UTC-7, Paxton wrote:
>>
>> Hey Guys, I am updating my rigging modules so that all (or most) of the
>> "maya.cmds" are replaced with "maya.OpenMaya" functions.
>>
>> So far so good...
>>
>> Though I find myself stuck on 2d nurbsCurves
>>
>> All of my bendyArms, Muscles and faces involve using the command
>> "DuplicateSurfaceCurve"
>> <https://knowledge.autodesk.com/support/maya-lt/learn-explore/caas/CloudHelp/cloudhelp/2015/ENU/MayaLT/files/Edit-Curves--Duplicate-Surface-Curves-htm.html>
>> to
>> create curves that live permanently within the 2d space of a nurbs surface
>> This has worked wonderfully up until now, but I would really like to
>> learn how to build 2d "surface space" curves without resorting to the
>> maya.cmds module..
>>
>> Heres is my exploration of this topic un until now..
>>
>>
>> import maya.OpenMaya as om
>>
>> #transform!
>> t = om.MFnDagNode().create('transform', 'i_am_a_thing')
>>
>> #Plane!
>> point_array = om.MPointArray()
>> point_array.append(om.MPoint(*[-1.0,0.0,-1.0]))
>> point_array.append(om.MPoint(*[1.0,0.0,-1.0]))
>> point_array.append(om.MPoint(*[-1.0,0.0,1.0]))
>> point_array.append(om.MPoint(*[1.0,0.0,1.0]))
>>
>> knot_aray_u = om.MDoubleArray()
>> knot_aray_u.append(0)
>> knot_aray_u.append(1)
>> knot_aray_v = om.MDoubleArray()
>> knot_aray_v.append(0)
>> knot_aray_v.append(1)
>> degree_u = 1
>> degree_v = 1
>> form_u = 1
>> form_v = 1
>> rational = False
>>
>> s = om.MFnNurbsSurface().create(point_array, knot_aray_u, knot_aray_v,
>> degree_u, degree_v, form_u, form_v, rational, t)
>>
>>
>> #Curve!
>>
>> point_array = om.MPointArray()
>> point_array.append(om.MPoint(*[0.0, 1.0]))
>> point_array.append(om.MPoint(*[1.0, 1.0]))
>>
>> knot_aray = om.MDoubleArray()
>> knot_aray.append(0)
>> knot_aray.append(1)
>>
>> #Next line is where problems happen.
>> #I assume I should pass the MObject of the shape node as the parent
>> #and set "create2D" to True..
>> #Yet, no luck.... Parent seems to be invalid :(
>>
>> curve = om.MFnNurbsCurve().create(point_array, knot_aray, degree_u,
>> form_u, True, False, s)
>>
>> Any insight would be valuable as f*&%K
>> thanks,
>> -Paxton
>>
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--
*Marcus Ottosson*
[email protected]
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