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<font size="-1"><font face="Helvetica, Arial, sans-serif">This option
sounds really good.<br>
<br>
How is the threshold of poinst I can display determined?<br>
If I can calculate this value from the available memory, I could make a
switch and </font></font><font face="Helvetica, Arial, sans-serif"
size="-1">SetGlpyhTypeToVertex() </font><small><font
face="Helvetica, Arial, sans-serif">instead of using arrows or spheres.</font></small><br>
<br>
<br>
<br>
Am 13.04.2010 13:34, schrieb Eric E. Monson:
<blockquote cite="mid:4A18027E-1593-4EFA-9721-79870FD1973C@cs.duke.edu"
type="cite">Hey Bill,
<div><br>
</div>
<div>That is one situation where using the vtkGlyphSource2D with
SetGlyphTypeToVertex() as the Source to your current vtkGlyph3D might
work out well. Each vertex is really only one point, which is good for
memory and for rendering speed. </div>
<div><br>
</div>
<div>There is also some code in the ParaView repository for doing
Point Sprites, but it's not something that's in the straight VTK
collection.</div>
<div><br>
</div>
<div>If the memory problem is stemming from not just the number of
points, but the number of scalars/vectors/tensors which are getting
copied to each point, too, then it might be worth copying only the
needed attributes to the data which will be glyphed with so many points.</div>
<div><br>
</div>
<div>Just as a side note, ParaView (<a moz-do-not-send="true"
href="http://www.paraview.org">www.paraview.org</a>), which is built
on top of VTK, works well for me when I'm trying to figure out how to
build up my visualization. It doesn't have everything that's in VTK,
but a lot of the parts are there, and it's a little easier sometimes to
just play with combinations of representations to see what's possible
or what looks good.</div>
<div><br>
</div>
<div>Talk to you later,</div>
<div>-Eric</div>
<div><br>
</div>
<div><br>
<div>
<div>On Apr 13, 2010, at 4:50 AM, Bill Chivas wrote:</div>
<br class="Apple-interchange-newline">
<blockquote type="cite">Hi Jerome,<br>
<br>
good argument!<br>
I use glyph mechanism in order to represent the points on the grid. Can
you think of other way to do that?<br>
Again, it seems to me impossible that there is no way with vtk to
visualize the points and the grid at the same time!<br>
<br>
Bill<br>
<br>
<div class="gmail_quote">2010/4/13 Jérôme <span dir="ltr"><<a
moz-do-not-send="true" href="mailto:jerome.velut@gmail.com">jerome.velut@gmail.com</a>></span><br>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi,<br>
The "not able to allocate..." message is the usual one when you don't
have enough memory.<br>
Don't forget that your sphere will be copied at each input point. Thus
the final number of <br>
points will be:<br>
number_of_sphere_points * number_of_input_points<br>
<br>
eg. 20x20 spheres = 400 points * 75k = 30M<br>
<br>
each input point data is copied over each sphere point. It multiplies
the amount of needed <br>
memory as well (fo instance, a tensor multiplies by 9, if it's double
data it is 4 octets <br>
more, etc.)<br>
<br>
HTH <br>
Jerome<br>
<br>
<br>
<div class="gmail_quote">
<div class="im">2010/4/13 Sebastian Gatzka <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:sebastian.gatzka@stud.tu-darmstadt.de" target="_blank">sebastian.gatzka@stud.tu-darmstadt.de</a>></span><br>
</div>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div bgcolor="#ffffff" text="#000000"><font size="-1"><font
face="Helvetica, Arial, sans-serif">I'm
experiencing the same problem!
<div>
<div class="h5"><br>
Any ideas? Lack of memory?<br>
</div>
</div>
</font></font>
<div>
<div class="h5"><br>
Am 13.04.2010 10:27, schrieb Bill Chivas:
<blockquote type="cite">
<div>
<div>Hi all,<br>
<br>
i use vtkGlyph3D with source a vtkSphereSource and input a
vtkunstructuredgrid.<br>
Grids with small number of vertices (approximately <10K ) are
glyphed ok.<br>
But large grids (e.g. vertices==75K) are not glyphed! A vtk message
appears saying "not able to allocate...something" (i can't read the
whole).<br>
<br>
What is the problem? Large grids with many vertices can't be glyphed?<br>
<br>
Bill<br>
</div>
</div>
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