[vtkusers] magnify vtkChartXY image

[Marcus D. Hanwell]

Let me double check how this is done in ParaView, I had been meaning
to add a VTK test for this - I will add it to me todo.

Marcus

On Mon, Dec 17, 2012 at 6:38 PM, Randy Heiland <heiland at indiana.edu> wrote:
> Sorry for the late reply - yes, I had tried it too and also got replicated charts.  But thanks for the follow-up!
>
> On Dec 17, 2012, at 2:42 PM, Bill Lorensen wrote:
>
>> I just tried it also. For some reason it just replicates the chart.
>>
>>
>>
>> On Mon, Dec 17, 2012 at 1:42 PM, Gerrick Bivins
>> <Gerrick.Bivins at halliburton.com> wrote:
>>> Just an FYI,
>>> I've tried to use that in the past and it didn't capture the render properly:
>>> http://vtk.1045678.n5.nabble.com/vtkRenderLargeImage-and-multiple-renders-td1240248.html
>>>
>>> I remember looking into it but I don't think I figured out what was wrong, something with multiple renderers was the issue for me I think.
>>> It may be fixed now because that was a couple of years and version of vtk ago
>>> Gerrick
>>>
>>>
>>> -----Original Message-----
>>> From: vtkusers-bounces at vtk.org [mailto:vtkusers-bounces at vtk.org] On Behalf Of Bill Lorensen
>>> Sent: Monday, December 17, 2012 11:19 AM
>>> To: Randy Heiland
>>> Cc: vtkusers at vtk.org
>>> Subject: Re: [vtkusers] magnify vtkChartXY image
>>>
>>> Randy,
>>>
>>> Have you tried vtkRenderLargeImage:
>>> http://vtk.org/Wiki/VTK/Examples/Cxx/Visualization/RenderLargeImage
>>>
>>> I have not tried it with a chart, but it's worth a shot.
>>>
>>> Regards,
>>>
>>> Bill
>>>
>>> On Fri, Dec 14, 2012 at 4:16 PM, Randy Heiland <heiland at indiana.edu> wrote:
>>>> Is there some way to magnify (or set the resolution of) a rendered chart, in order to generate a higher-res image from a Writer?  e.g. I attempted the following simple Python script, which did indeed generate a magnified (x 2) .png image, but it was not what I expected.
>>>>
>>>> thanks, Randy
>>>>
>>>> from vtk import *
>>>>
>>>> table = vtkTable()
>>>> arrX = vtkFloatArray()
>>>> arrX.SetName("X")
>>>> table.AddColumn(arrX)
>>>> arrY = vtkFloatArray()
>>>> arrY.SetName("Y")
>>>> table.AddColumn(arrY)
>>>>
>>>> table.SetNumberOfRows(2)
>>>> table.SetValue(0, 0, 0.0)
>>>> table.SetValue(1, 0, 1.0)
>>>> table.SetValue(0, 1, 0.0)
>>>> table.SetValue(1, 1, 1.0)
>>>>
>>>> view = vtkContextView()
>>>>
>>>> chart = vtkChartXY()
>>>> view.GetScene().AddItem(chart)
>>>> line = chart.AddPlot(vtkChart.LINE)
>>>> line.SetInput(table, 0, 1)
>>>>
>>>> view.GetInteractor().Initialize()
>>>> view.GetRenderWindow().SetSize(200,200)
>>>>
>>>> imgFilter = vtkWindowToImageFilter()
>>>> imgFilter.SetInput(view.GetRenderWindow())
>>>> imgFilter.SetMagnification(2)
>>>>
>>>> writer=vtkPNGWriter()
>>>> writer.SetFileName("chart.png")
>>>> writer.SetInputConnection(imgFilter.GetOutputPort())
>>>> writer.Write()
>>>>
>>>> #view.GetInteractor().Start()
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>>>
>>>
>>>
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>>
>>
>>
>> --
>> Unpaid intern in BillsBasement at noware dot com
>