Hello,<br><br>I can't give you a direct answer, but I think what you want can be done with the vtkClipDataSet filter (5.8). See the reference for details. I assume that adjusting the lookup table would work faster, though.<br>
<br>When trying to realize a "filled contour plot" by adjusting the lookup table (to a series of steps) I experienced that some interpolation was performed nonetheless and I ended up with blurred filled contours. Maybe this would also happen in your case.<br>
<br>Kind regards,<br>Johannes Strecha.<br><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Dec 3, 2012 at 5:31 PM, Frédéric Speisser <span dir="ltr"><<a href="mailto:speisser@kappaeng.com" target="_blank">speisser@kappaeng.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
Hi all,<br>
<br>
<br>
I'm using <i>vtkLookupTable::SetTableRange</i> to remap colors of a
LUT to a custom range of a given scalar values. <br>
<br>
This works great but per default and as explained in API
documentation :<br>
<i>Scalar values less than minimum range value are clamped to
minimum range value. Scalar values greater than maximum range
value are clamped to maximum range value.<br>
</i>So values out of range are displayed in minimum range value
color (for those under custom range) and in maximum range value
color (for those over custom range).<br>
I would like to display out-of-range values in a custom color, so
that for example all values under and over custom range are
displayed in black.<br>
I began to write a class <i>MyVtkLookupTable</i> which inherits
from <i>vtkLookupTable </i>and i tried to override <i>GetColor(double
v, double rgb[3])</i> and <i>MapValue(double v)</i> to be able to
override color displayed but it seems not to work.<br>
Is it possible to do that by overriding vtk classes ? If yes, which
method/classes should I override ?<br>
<br>
Any clues are wellcome, thank you,<br>
<br>
<br>
<br>
Frédéric
</div>
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