<DIV>Hello Marc,</DIV> <DIV> </DIV> <DIV>Thanks for the reply.</DIV> <DIV> </DIV> <DIV>I started working back on this texture issue now, which set aside due to other high priority work.</DIV> <DIV> </DIV> <DIV>But when i visualize these surface models, in third party vrml viewers the texture comes out well. Its only in my program that i find these pattern of cracks.</DIV> <DIV> </DIV> <DIV>What do you think could be the problem ?</DIV> <DIV> </DIV> <DIV>Regards,</DIV> <DIV> </DIV> <DIV>Deepak<BR><BR><B><I>Marc Cotran <marc@cotran.ca></I></B> wrote:</DIV> <BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">Hi Deepak,<BR><BR>I had experienced similar results before and concluded that the polygon <BR>normals were the culprit. I would suggest visualizing the polydata mesh <BR>in wireframe to see if some of your polygons are oriented opposite to <BR>the others. I am not sure this is what
you're dealing with, but it might <BR>explain your problem. As for a potential solution... I am at a loss.<BR><BR>Should you figure out the problem, I'd love to know the solution.<BR><BR>HTH,<BR><BR>Marc<BR><BR>Deepak Roy wrote:<BR>> <BR>> Hello everyone,<BR>> <BR>> I have had a hard time trying to fix this texture display problem.<BR>> <BR>> Attached is a part of the texture image i am using for the human body. <BR>> I have removed the face and other parts due to some identity revealment <BR>> problems.<BR>> <BR>> But the image gives an idea of the problem i am facing. Look at the <BR>> image and you will see the cracks on the texture.<BR>> <BR>> when i visualize the same model in some other standard graphics software <BR>> like Rapid Forms, the texture shows up with out any cracks.<BR>> <BR>> I have tried all the possible options with vtkTexture but still i could <BR>> not fix the problem.<BR>> <BR>> /"Can anyone explain
this phenomenon ? "/<BR>> <BR>> One more point to note, which i also mentioned in my previous posting to <BR>> the mailing list, is that exactly the same pattern of cracks appear in <BR>> every model i load.<BR>> <BR>> I suspect, it is got to do with clamping or interpolation.<BR>> <BR>> Please help me fix this problem.<BR>> <BR>> Thanks in Advance.<BR>> <BR>> Regards,<BR>> <BR>> Deepak Roy<BR>> <BR>> <BR>> <BR>> <BR>> Yahoo! Music Unlimited - Access over 1 million songs. Try it free. <BR>> <HTTP: evt="36035/*http://music.yahoo.com/unlimited/" us.rd.yahoo.com *http: pa.yahoo.com><BR>> <BR>> ------------------------------------------------------------------------<BR>> <BR>> Subject:<BR>> Texture Mapping Problem....Please Help !!!!!<BR>> From:<BR>> Deepak Roy <CDEEPAKROY@YAHOO.COM><BR>> Date:<BR>> Fri, 14 Oct 2005 15:42:33 -0700 (PDT)<BR>> To:<BR>> vtkusers@vtk.org<BR>> <BR>> To:<BR>>
vtkusers@vtk.org<BR>> <BR>> <BR>> Hi,<BR>> <BR>> I am trying to displaying a 3D surface of a human body with texture, all <BR>> captured from a 3D scan. I am using vtkTecture to assosciate the actor <BR>> with the texture.<BR>> <BR>> The problem is:<BR>> <BR>> I see a pattern of cracks on surface when displayed with texture. These <BR>> cracks are not present in the basic geometry of the model as the surface <BR>> when visualised without texture appears fine and smooth. I am 100% sure <BR>> that this is the problem with texture mapping.<BR>> <BR>> One more thing that was wierd was that i see more or less the same <BR>> pattern of tracks on each model i display.<BR>> <BR>> Could anyone explain the reason why this is happening?<BR>> <BR>> I guess the problem is with the edge clamping used while mapping the <BR>> texture. But vtkTexture does not give me any control on how to change <BR>> these parameters.<BR>>
<BR>> How can i change the these parameters and control the way texture <BR>> mapping is done. Is there an easy way to do this?<BR>> <BR>> Thanks in Advance.<BR>> <BR>> Regards<BR>> <BR>> Deepak<BR>> <BR>> <BR>> Yahoo! Music Unlimited - Access over 1 million songs. Try it free. <BR>> <HTTP: evt="36035/*http://music.yahoo.com/unlimited/" us.rd.yahoo.com *http: pa.yahoo.com><BR>> <BR>> ------------------------------------------------------------------------<BR>> <BR>> <BR>> ------------------------------------------------------------------------<BR>> <BR>> _______________________________________________<BR>> This is the private VTK discussion list. <BR>> Please keep messages on-topic. Check the FAQ at: http://www.vtk.org/Wiki/VTK_FAQ<BR>> Follow this link to subscribe/unsubscribe:<BR>> http://www.vtk.org/mailman/listinfo/vtkusers<BR></BLOCKQUOTE> <DIV><BR></DIV><p>
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