[vtkusers] How to paint(colorwash) the surface of an object(vtkPolyData) using values from a vtkImageData

[Bill Lorensen]

I see. You want to apply a "texture." This is much more complex. You
will need to compute texture coordinates.  If your model maps to a
cylinder, plane or sphere, this is easy. For an arbitrary surface,
this is much more difficult.

Bill

On Thu, Feb 28, 2008 at 4:03 PM, Hai Pham <hdp203 at yahoo.com> wrote:
> Thank you for your response.
>
> When I use vtkProbeFilter with vtkPolyData as input and vtkImageData as source, it seems like the filter only calculate scalar values at the vertices of each triangle in the input vtkPolyData.
> What I want is to have it automatically interpolate from vtkImageData object (NOT from triangle vertices) to determine the value of pixels inside the triangles (just like what vtkImagePlaneWidget does)
> What am I missing here?
>
> Thanks, hdp.
>
>
> ----- Original Message ----
> From: Bill Lorensen <bill.lorensen at gmail.com>
> To: hdp203 <hdp203 at yahoo.com>
> Cc: vtkusers at vtk.org
> Sent: Thursday, February 28, 2008 3:02:59 PM
> Subject: Re: [vtkusers] How to paint(colorwash) the surface of an object(vtkPolyData) using values from a vtkImageData
>
> You can use vtkProbeFilter to assign scalars to points. Specify the
> image data as the source.
>
>
> On Thu, Feb 28, 2008 at 2:36 PM, hdp203 <hdp203 at yahoo.com> wrote:
> >
> >  Hi,
> >  I have a vtkPolyData object and a vtkImageData object.
> >  The vtkPolyData object contains a set of triangles (polys) to makeup a
> >  surface of an object in 3D.
> >  The vtkImageData object (in the same coordinate system as vtkPolyData
> >  object) contains a 3D array of floats.
> >  I want to paint(color wash) the surface of vtkPolyData object using the
> >  floating point values from the 3D array.
> >  Is it doable in vtk?
> >  Can someone please tell me which filter(s) to use to accomplish this?
> >
> >  Thank you,
> >  hdp.
> >  --
> >  View this message in context: http://www.nabble.com/How-to-paint%28colorwash%29-the-surface-of-an-object%28vtkPolyData%29-using-values-from-a-vtkImageData-tp15744115p15744115.html
> >  Sent from the VTK - Users mailing list archive at Nabble.com.
> >
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