[vtkusers] Rending texture problem

[Bill Lorensen]

The 3DSImporter only reads geometry and colors. If does not read the
texture(which I think is stored in an .mli file) nor the texture
coordinates (which I think are called mapping coordinates).

On Sun, Sep 26, 2010 at 12:20 AM, quengzi <quengzi at gmail.com> wrote:
> I have read the source code of vtk3DSImpoter and vtkOBJReader, vtk3DSImpoter
> implement below functions which related the metadata:
> ImportProperties // just walk the list of material properties, creating vtk
> properties
> ImportLights
> ImportCameras
> ImportActors
> And there is a function named "parse_mdata":
> if (chunk.end <= mainchunk->end)
>       {
>       switch (chunk.tag)
>         {
>         case 0x2100: parse_colour (importer, &global_amb);
>           break;
>         case 0x1200: parse_colour (importer, &bgnd_colour);
>           break;
>         case 0x2200: parse_fog (importer, &chunk);
>           break;
>         case 0x2210: parse_fog_bgnd(importer); //It's a empty function, not
> implement yet
>           break;
>         case 0xAFFF: parse_mat_entry (importer, &chunk);
>           break;
>         case 0x4000: parse_named_object (importer, &chunk);
>           break;
>         }
>       }
> the vtkOBJReader in the IO folder, but the vtk3DSImporter be put into Hybird
> folder.
>
>
> 2010/9/26 quengzi <quengzi at gmail.com>
>>
>> Thank you Eric very much!
>> Your advise is very important for me, I have searched the old mailing
>> list, but most of the problem about 3DSImpoter is no result. I think you are
>> right, the designer need send me another file format.
>>
>> Yun
>>
>> 2010/9/26 Eric E. Monson <emonson at cs.duke.edu>
>>>
>>> Hey Yun,
>>>
>>> I've never used the vtk3DSImporter (or dotnet), but I would guess that if
>>> the importer has problems with textures, then probably it's not just losing
>>> the textures, but it's also not importing the texture coordinates. So, when
>>> you try to apply a texture manually there is nothing to tell the system
>>> where to put the texture.
>>>
>>> I have a feeling, looking back on old mailing list postings, that the
>>> 3DSImporter really just grabs the most basic geometry, and computes Normals,
>>> but it's not designed to pull in anything more than the polygons. I'm sure
>>> this will disappoint you, but maybe there's a chance someone else has
>>> another solution for converting your file into another format...?
>>>
>>> Good luck,
>>> -Eric
>>>
>>> ------------------------------------------------------
>>> Eric E Monson
>>> Duke Visualization Technology Group
>>>
>>>
>>> On Sep 25, 2010, at 11:22 AM, quengzi wrote:
>>>
>>> > Hi all,
>>> >
>>> > I'm a newer of VTK, I use VTK Dotnet to open a 3ds file, someone tell
>>> > me that vtk3DSImpoter do not support texture, so I want to draw it by
>>> > manual, but it failed, I cannot see any different after add the texture by
>>> > manual, below is my code:
>>> >             string fileName = @"E:\VTK\3D Module\Mickey\Mickey.3ds";
>>> >             vtk3DSImporter importer = new vtk3DSImporter();
>>> >             importer.ComputeNormalsOn();
>>> >             importer.SetFileName(fileName);
>>> >             importer.Read();
>>> >             importer.GetRenderer().ResetCamera();
>>> >             importer.DebugOn();
>>> >
>>> >             //Add or Remove this section, no differents
>>> >             vtkPNGReader pngReader = new vtkPNGReader();
>>> >             pngReader.SetDebug(1);
>>> >             pngReader.SetFileName(@"E:\VTK\3D Module\Mickey\l.png");
>>> >             vtkTexture texture = new vtkTexture();
>>> >             texture.SetInput(pngReader.GetOutput());
>>> >             texture.InterpolateOn();
>>> >             vtkActor actor = new vtkActor();
>>> >             actor.SetTexture(texture);
>>> >             importer.GetRenderer().AddActor(actor);
>>> >
>>> >             //Below is add a light, and it's okay
>>> >             vtkLight light = new vtkLight();
>>> >             light.SetColor(1,1 , 1);
>>> >             light.SwitchOn();
>>> >             light.SetIntensity(0.9);
>>> >             light.SetAmbientColor(1, 1, 1);
>>> >
>>> > light.SetPosition(importer.GetRenderer().GetActiveCamera().GetPosition());
>>> >
>>> > light.SetFocalPoint(importer.GetRenderer().GetActiveCamera().GetFocalPoint());
>>> >
>>> >             importer.GetRenderer().SetBackground(0.1,0.2,0.4);
>>> >             importer.GetRenderer().AddLight(light);
>>> >
>>> >             renderer[0] = importer.GetRenderer();
>>> >             AddRendererToRenderWindow(renWin);
>>> > ...
>>> > Any suggestions will be appropriated.
>>> >
>>> > Thanks,
>>> > Yun
>>> > _______________________________________________
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>>
>
>
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