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<DIV><FONT face=Arial size=2>Hello VTK users,<BR> i am send ing this mail
in connection with my doubt in implementing VTKOBBtree. I mailed no of
times in vtk mailing list. But id din't get the answer.,<BR>sir,<BR> I am
interested to use vtkOBBtree for checking collsion between 2 objects. I am using
OPengl window.<BR>I've 2 objects in vtkPOlyData form.<BR><BR>vtkobbtree
m_vtkPIpe;<BR>vtkobbtree m_vtkBase;<BR>vtkmatrix4*4
m_vtkmatrix<BR>if(m_vtkPipe)<BR>m_vtkPipe->Delete();<BR>m_vtkPipe=vtkOBBTree::New();<BR><FONT
color=#ff0000><STRONG>m_vtkPipe->SetDataSet(g_pCNCHandler->m_pSimHandler->m_pVtkPolyData);</STRONG></FONT><BR>m_vtkPipe->SetMaxLevel(5);<BR>m_vtkPipe->SetTolerance(0.0001);<BR>m_vtkPipe->BuildLocator();<BR><BR>m_vtkBase=vtkOBBTree::New();<BR>m_vtkBase->SetDataSet(pBase->m_pPoly);<BR>m_vtkBase->SetMaxLevel(5);<BR>m_vtkBase->SetTolerance(0.00000001);<BR>m_vtkBase->BuildLocator();<BR><BR><BR> in
the display function<BR>{<BR><BR>glbegin()<BR>--<BR>--<BR>--glend()<BR>float
mat[16];<BR><STRONG><FONT
color=#ff0000>glgetdoublev(gl_modelview_matrix,mat);<BR>m_vtkmatrix=mat(copying.....)<BR></FONT></STRONG>}<BR><BR><BR><FONT
color=#ff0000>int CallFunc(vtkOBBNode *nodeA, vtkOBBNode *nodeB, vtkMatrix4x4
*Xform, void *arg)<BR>{<BR>int
n=g_pCNCHandler->m_pSimHandler->m_pCollisionDetector->m_vtkPipe->DisjointOBBNodes
(nodeA,nodeB,Xform);<BR>if(n==1)<BR>{<BR>g_pCNCHandler->m_pSimHandler->m_bCollision=TRUE;<BR>}<BR></FONT><BR><FONT
color=#008000><STRONG>collsiondetectionFunction()<BR>{<BR>int op =
m_vtkBase->IntersectWithOBBTree(m_vtkBase, m_vtkMatrixBase , CallFunc, NULL)
;<BR><BR><BR>}</STRONG></FONT></FONT></DIV>
<DIV><STRONG><FONT face=Arial color=#008000 size=2></FONT></STRONG> </DIV>
<DIV><STRONG><FONT face=Arial color=#008000 size=2></FONT></STRONG> </DIV>
<DIV><STRONG><FONT face=Arial color=#008000 size=2></FONT></STRONG> </DIV>
<DIV><STRONG><FONT face=Arial color=#008000 size=2>i wangt your special
attention on the items i made bold. when i run this program it doesn't extract
collision. Sometimes it gives collsion message even if there's no
collsion.</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial color=#008000 size=2>I know this is a long mail,
but i think it will help u anlayse my problem. I hope some of you will
give me a solution.</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial color=#008000 size=2>regards</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial color=#008000
size=2>kannan</FONT></STRONG></DIV></BODY></HTML>