[vtkusers] Coloring a 2D Mapper

[Dirk Schmedding]

Hi!

I have tried this, but nothing happend. I added ScalarVisibilityOff to 
the vtkPolyDataMapper2D, but I have seen no effect.

Herewith the releated code fragment, maybe someone of you can see and 
tell me where ( and that seems for me to be the problem) I have to say 
the mapper what it has to use (namely the z position data) to color its 
content. Or what ever the problem could be...

thanks a lot!
Dirk


//====================================================================================

  vtkTransform *drillTransformCylinderM = vtkTransform::New();
  drillTransformCylinderM->Identity();
  drillTransformCylinderM->Translate( xRangeL, yRangeL, zRangeL );

  vtkCylinderSource *drillCylinderM = vtkCylinderSource::New();
  drillCylinderM->SetCenter( xRangeL, yRangeL, zRangeL );
  drillCylinderM->SetRadius( 4.0 );
  drillCylinderM->SetHeight( 100 );
  drillCylinderM->SetResolution( 5 );

  vtkTransformPolyDataFilter *drillTransPDCylinderM = 
vtkTransformPolyDataFilter::New();
  drillTransPDCylinderM->SetInput( drillCylinderM->GetOutput() );
  drillTransPDCylinderM->SetTransform( drillTransformCylinderM );

  vtkPolyDataMapper *drillCylinderMapperM = vtkPolyDataMapper::New();
  drillCylinderMapperM->SetInput( drillTransPDCylinderM->GetOutput() );

  vtkActor *drillCylinderActorM = vtkActor::New();
  drillCylinderActorM->SetMapper( drillCylinderMapperM );
  drillCylinderActorM->GetProperty()->SetColor( 0.47, 0.56, 0.73);		 
drillCylinderActorM->SetOrigin( xRangeL, yRangeL, zRangeL );

  rendererM->AddActor( drillCylinderActorM );

  //transform object for drill, needed to show drill at plane 1
  vtkTransform* transformDrill1 = vtkTransform::New();
  transformDrill1->Identity();
  transformDrill1->Scale(plane1ScaleFactorM, plane1ScaleFactorM, 
plane1ScaleFactorM);
  transformDrill1->Translate(-DataBoundsM[0], 
-DataBoundsM[2],-DataBoundsM[4]);

  //transform filter for drill and plane 1 (needed to apply transform to 
drill)
  vtkTransformPolyDataFilter* transformFilterDrill1 = 
vtkTransformPolyDataFilter::New();
  transformFilterDrill1->SetInput( drillTransPDCylinderM->GetOutput());
  transformFilterDrill1->SetTransform(transformDrill1);
  //transform filter for cone and plane 1 (needed to apply transform to 
cone)
  vtkTransformPolyDataFilter* transformFilterCone1 = 
vtkTransformPolyDataFilter::New();
  transformFilterCone1->SetInput(drillTransPDConeM->GetOutput());
  transformFilterCone1->SetTransform(transformDrill1);

  vtkPlane *plane11 = vtkPlane::New();
  vtkPolyDataMapper2D *mapper11 = vtkPolyDataMapper2D::New();
  mapper11->SetInput( transformFilterDrill1->GetOutput() );
  mapper11->CreateDefaultLookupTable( );
  mapper11->ScalarVisibilityOff();
  mapper11->AddClippingPlane ( plane11 );
  vtkActor2D *gridActor11 = vtkActor2D::New();
  gridActor11->SetMapper( mapper11 );

  plane1RendererM->AddActor2D( gridActor11 );

//====================================================================================




Wu Ruoyun schrieb:
> Hi
> 
> I encounter similar (but not exactly the same) problem yesterday. Gwen's advice solves my problem. Please try
> 
> 	mapper->ScalarVisibilityOff();
> 
> Best Wishes!
> Ruoyun
> 
> 
> -----Original Message-----
> From: Dirk Schmedding [mailto:dirk.schmedding at zn-ag.com]
> Sent: Tuesday, June 17, 2003 12:57 AM
> To: vtkusers at public.kitware.com
> Subject: [vtkusers] Coloring a 2D Mapper
> 
> 
> Hi!
> 
> I don't know how to color an object mapped to a 2D Actor.
> 
> What I want is to map a cylinder to an 2D image and color it  	analogous
> to its z (position) value. So far, so easy...
> 
> To map the object is no problem, but now I want to color the mapped
> object. As greater as the z (position) value of the object is, as
> brighter or darker the color have to be. (or colorfuller or what ever
> seems to be easier to realize)
> 
> I hope anybody can help me!
> By the way, I am working with Visual C++ under Windows NT.
> 
> best regards
> Dirk
> 
> 
> The current pipeline looks like this:
> 
> --------------- -------------------    ---------------
> |vtkTransform | |vtkCylinderSource|    |vtkTransform |
> --------------- -------------------    ---------------
>              |      |                        |
>              v      v                        v
> ----------------------------    ----------------------------
> |vtkTransformPolyDataFilter|--> |vtkTransformPolyDataFilter|
> ----------------------------    ----------------------------
>    |                                          |
>    v                                          v
> -------------------    ----------    ---------------------
> |vtkPolyDataMapper|    |vtkPlane|--> |vtkPolyDataMapper2D|
> -------------------    ----------    ---------------------
>    |                                           |
>    v                                           v
> ----------                               ------------
> |vtkActor|                               |vtkActor2D|
> ----------                               ------------
>    |                                           |
>    v                                           v
> -------------------                  -------------------
> |vtkRendererWidget|                  |vtkRendererWidget|
> -------------------                  -------------------
> 
> 
> 
> 
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