[vtkusers] VTK 2D Control Points example

[Jothybasu Selvaraj]

If you are using vtkCharts for plotting then it can handle 2D plots just by
mentioning (X,Y).

Are you using vtkCharts?



On Tue, Jun 26, 2012 at 1:04 PM, Gishara Indeewarie <gish.777 at gmail.com>wrote:

> ok.Thanks. Is this true to do 2d plot also?
> Because my problem is that I only need to show the 2D one.
>  Users should not be given the ability to rotate the contour.
> Is there any way of adding control points to a 2D plot?
> Thanks again for the help.
>
> On Tue, Jun 26, 2012 at 5:30 PM, Jothybasu Selvaraj <jothybasu at gmail.com>wrote:
>
>> Any point in 3D requires (X,Y,Z). You can't define a contour with just
>> (X,Y) values.
>>
>> Consider a circle with 10 mm radius, you may be happy with the (X,Y)
>> values but VTK should be told where it should be positioned in the Z axis.
>>
>>
>> Jothy
>>
>>
>> On Tue, Jun 26, 2012 at 12:47 PM, Gishara Indeewarie <gish.777 at gmail.com>wrote:
>>
>>> Hi Jothy, Thanks for the reply.
>>> Can you explain me it further?
>>> I want just a 2D contour, which means that I do not have the ability to
>>> rotate it.
>>>
>>>
>>> On Tue, Jun 26, 2012 at 4:35 PM, Jothybasu Selvaraj <jothybasu at gmail.com
>>> > wrote:
>>>
>>>> You could simply set the z value to the z value of the plane on which
>>>> you are drawing.
>>>>
>>>> Jothy
>>>>
>>>> On Tue, Jun 26, 2012 at 12:02 PM, Gishara Indeewarie <
>>>> gish.777 at gmail.com> wrote:
>>>>
>>>>> I just have only x and y values to draw the contour.
>>>>>  My requirement is that I need to add some control points to the
>>>>> contour, so the
>>>>> user can adjust the shape using control points. The example works fine
>>>>> (http://www.cmake.org/Wiki/VTK/Examples/Cxx/Widgets/ContourWidget)
>>>>> unless it uses x,y,z data. I only want to have x,y data.
>>>>> How can I do this?
>>>>> Please help me.
>>>>>
>>>>> On Tue, Jun 26, 2012 at 10:52 AM, Gishara Indeewarie <
>>>>> gish.777 at gmail.com> wrote:
>>>>>
>>>>>> Dear all,
>>>>>>
>>>>>> I want to do a 2d contour with some control points in vtk.
>>>>>> I have found the example below:
>>>>>> http://www.cmake.org/Wiki/VTK/Examples/Cxx/Widgets/ContourWidget
>>>>>>
>>>>>> This is good, but the problem is I only want a 2D one.
>>>>>> Is there any way to do something like this for 2d data?
>>>>>> Thanks in advance.
>>>>>>
>>>>>
>>>>>
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>>>>
>>>>
>>>> --
>>>> Jothybasu Selvaraj
>>>> PhD Student
>>>> University of Liverpool
>>>> UK
>>>>
>>>>
>>>
>>>
>>> --
>>> Gish
>>>
>>
>>
>>
>> --
>> Jothybasu Selvaraj
>> PhD Student
>> University of Liverpool
>> UK
>>
>>
>
>
> --
> Gish
>



-- 
Jothybasu Selvaraj
PhD Student
University of Liverpool
UK
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