<div dir="ltr">Did you<div><br></div><div><div> //@{</div><div> /**</div><div> * Set/Get a global flag that controls whether coincident topology (e.g., a</div><div> * line on top of a polygon) is shifted to avoid z-buffer resolution (and</div><div> * hence rendering problems). If not off, there are two methods to choose</div><div> * from. PolygonOffset uses graphics systems calls to shift polygons, lines</div><div> * and points from each other. ShiftZBuffer is a legacy method that used to</div><div> * remap the z-buffer to distinguish vertices, lines, and polygons, but</div><div> * does not always produce acceptable results. You should only use the</div><div> * PolygonOffset method (or none) at this point.</div><div> */</div><div> static void SetResolveCoincidentTopology(int val);</div><div> static int GetResolveCoincidentTopology();</div><div> static void SetResolveCoincidentTopologyToDefault();</div><div> static void SetResolveCoincidentTopologyToOff()</div><div> { SetResolveCoincidentTopology(VTK_RESOLVE_OFF) ;}</div><div> static void SetResolveCoincidentTopologyToPolygonOffset()</div><div> { SetResolveCoincidentTopology(VTK_RESOLVE_POLYGON_OFFSET); }</div><div> static void SetResolveCoincidentTopologyToShiftZBuffer()</div><div> { SetResolveCoincidentTopology(VTK_RESOLVE_SHIFT_ZBUFFER); }</div><div> //@}</div><div><br></div><div><br></div><div>specifically</div><div><div><br></div><div> mapper->SetResolveCoincidentTopologyToPolygonOffset(); ?</div></div><div><br></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Jul 16, 2018 at 9:43 PM, pnt1614 <span dir="ltr"><<a href="mailto:minpu.code@gmail.com" target="_blank">minpu.code@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Let's me describe my situation, first I pick many points and then render all<br>
cell edges around those points in different color. Everything is okay but<br>
when I rotate the camera, there are some edges disappeared. I am not sure<br>
what the problem is but it looks like a z-fighting problem. I have attached<br>
two images to show this problem.<br>
<<a href="http://vtk.1045678.n5.nabble.com/file/t342361/Image1.jpg" rel="noreferrer" target="_blank">http://vtk.1045678.n5.nabble.<wbr>com/file/t342361/Image1.jpg</a>> <br>
<<a href="http://vtk.1045678.n5.nabble.com/file/t342361/Image2.jpg" rel="noreferrer" target="_blank">http://vtk.1045678.n5.nabble.<wbr>com/file/t342361/Image2.jpg</a>> <br>
<br>
<br>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div>Ken Martin PhD<div>Distinguished Engineer<br><span style="font-size:12.8px">Kitware Inc.</span><br></div><div>101 East Weaver Street<br>Carrboro, North Carolina<br>
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