[vtkusers] About Volume Rendering in vtkNightly

[Shade]

Hello Lisa,

    Thank you for your help.
    I don't use the abstract superclass Mapper directly, I use the 
vtkVolumeTextureMapper2D and vtkVolumeProMapper instead. Today I debug 
my application again and found the following reason.
    Following is my sample code:
======================================================
 vtkStructurePoints pStructuredPointsData = vtkStructurePoints::New();
////////////////////////////////////////////////////////////////////
 Read the volume data
////////////////////////////////////////////////////////////////////
 vtkTransform *pTransform = NULL;
 pTransform = vtkTransform::New();
// the next red color sentence is important
 pTransform->RotateX(90);

 // reslice the volume data to rotate it.
 vtkImageReslice *pImageReslice = vtkImageReslice::New();
 pImageReslice->SetInput(pStructuredPointsData);
 pImageReslice->SetResliceTransform(pTransform);

// Get the volume data after reslice
 vtkImageData *pImageData = m_pImageReslice->GetOutput();
////////////////////////////////////////////////////////////////////
  Then set the pImageData as the Volume Mapper(vtkVolumeProMapper, 
vtkVolumeTextureMapper2D, etc.) input to render it.
////////////////////////////////////////////////////////////////////
==================================================================

    But strange phenomena appear. With the above red color sentence, 
then the render will display nothing what I mentioned in the last mail; 
without the red color sentence then everything is OK.
    I don't know whether the vtkTransform has problem or the 
vtkImageReslice has problem or my rendering methos has problem. 
    Can you give me some advice? Thank you.

Yours,
Shade

----- Original Message ----- 
From: "Lisa S. Avila" <lisa.avila at kitware.com>
To: "Shade" <shade_cn at yahoo.com>; <vtkusers at public.kitware.com>
Sent: Monday, October 29, 2001 2:06 PM
Subject: Re: [vtkusers] About Volume Rendering in vtkNightly


> Hello Shade,
> 
> What mapper are you using? You indicate vtkVolumeMapper in your email, but
> it is not valid (hopefully not possible!) to use a vtkVolumeMapper for
> rendering - it is an abstract superclass.
> 
> Lisa
> 
> ----- Original Message -----
> From: "Shade" <shade_cn at yahoo.com>
> To: <vtkusers at public.kitware.com>
> Sent: Friday, October 26, 2001 10:58 PM
> Subject: [vtkusers] About Volume Rendering in vtkNightly
> 
> 
> > Dear VTK Users,
> >
> >     I download the vtk nightly version of 2001/10/25 and
> > 2001/10/26, but I can't render anything with Volume Mapper,it
> > seems the lookup table has no effect to the volume, all the
> > volume cell color is the background color, so in the render
> > window, it seems there is nothing. If I use the VTK3.2
> > Official Release, it is no problem. I can't find the reason,
> > who can give me some hints, thanks a lot.
> >
> > Best Regards,
> > Shade
> >
> >
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