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<div class="moz-cite-prefix">On 1/26/2016 3:21 PM, John Carlson
wrote:<br>
</div>
<blockquote
cite="mid:DB8D08AE-E79F-4AF0-9F94-1E3A31C9153E@gmail.com"
type="cite">
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charset=windows-1252">
Leonard, I think you forget that Extrusion splines etc. can be
animated. If Maya can export an Extrusion animation to X3D V4.0
and your new elements can handle animation of it, I think we are
fine.</blockquote>
<br>
In Maya and Blender, extrusions are converted to IndexedFaceSets.
These can be animated through the usual mechanisms in those
applications. The results are typically stored in a FBX file.
Unfortunately, the FBX format is not open and not too conducive to
importing in a browser. Autodesk provides a C++ and Python API for
accessing the file.<br>
<br>
Extrusions are just a convenience node for creating a constrained
IndexedFaceSet. I am working on exactly how X3D fits in the process
chain from modeling tools to display. The goal is that X3D is an
declarative archivable format that has a browser-based run time. The
goal is to not reduce the display capability of X3D in that chain;
however, not all of the functionality of X3D V3.3 is necessary to
remain in the node definitions to make that happen. <br>
<br>
Animation of the spline and cross-sections of an extrusion is much
easier for the developer, but puts a much greater load on the
run-time as it needs to re-triangulate the result on each animation.<br>
<br>
<br>
Leonard Daly<br>
<br>
<br>
<br>
<br>
<br>
<blockquote
cite="mid:DB8D08AE-E79F-4AF0-9F94-1E3A31C9153E@gmail.com"
type="cite">
<div class=""><br class="">
</div>
<div class="">John<br class="">
<div>
<blockquote type="cite" class="">
<div class="">On Jan 26, 2016, at 1:47 PM, Leonard Daly <<a
moz-do-not-send="true"
href="mailto:Leonard.Daly@realism.com" class=""><a class="moz-txt-link-abbreviated" href="mailto:Leonard.Daly@realism.com">Leonard.Daly@realism.com</a></a>>
wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
<div class="moz-cite-prefix" style="font-family:
Helvetica; font-size: 12px; font-style: normal;
font-variant: normal; font-weight: normal;
letter-spacing: normal; orphans: auto; text-align:
start; text-indent: 0px; text-transform: none;
white-space: normal; widows: auto; word-spacing: 0px;
-webkit-text-stroke-width: 0px; background-color:
rgb(255, 255, 255);">I would like to ask the question
very differently. My question is not to ignore the
importance of getting the definition correct for X3D
<= V3.3.<br class="">
<br class="">
<br class="">
Most (>95%) 3D modeling is done with a tool. In
non-CAD environment, the tools is almost certainly Maya
or Blender. Both of those tools have extrusions built in
to their interface. I imagine CAD tools are similar.
With so many tools providing graphical extrusion
editors, and some of the tools being open-source (at
least Blender);<br class="">
<br class="">
Do we need an extrusion node in V4 to support content
developed for V4+?<span class="Apple-converted-space"> </span><br
class="">
<br class="">
<br class="">
Leonard Daly<br class="">
<br class="">
<br class="">
<br class="">
On 1/26/2016 7:15 AM, Alekseyev, Vsevolod (NIH/NIAID)
[E] wrote:<br class="">
</div>
<blockquote
cite="mid:CC1C444FB9E32940BA18B288E9CAB83C213F30FC@msgb05.nih.gov"
type="cite" style="font-family: Helvetica; font-size:
12px; font-style: normal; font-variant: normal;
font-weight: normal; letter-spacing: normal; orphans:
auto; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: auto;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
background-color: rgb(255, 255, 255);" class="">
<div style="direction: ltr; font-family: Tahoma;
font-size: 10pt;" class="">Hi X3D community,
<div class=""><br class="">
</div>
<div class="">I've tried and failed twice to explain
the problems with the definition of the Extrusion
node. So here's a tl;dr version:</div>
<div class=""><br class="">
</div>
<div class="">Dear authors of the X3D standard, please
take a careful look at the standard and answer me:</div>
<div class=""><br class="">
</div>
<div class="">1) When the spine goes (0,0,0)-(0,-1,0),
what is the CSP?</div>
<div class="">Note: all answers but one will render
one of the reference models in the Savage archive
invalid.</div>
<div class=""><br class="">
</div>
<div class="">2) When the spine goes <span
style="font-size: 13.3333px;" class="">(0,0,0)-(0,1,0)-(0,0,0),
what is the CSP?</span></div>
<div class=""><span style="font-size: 13.3333px;"
class=""><br class="">
</span></div>
<div class=""><span style="font-size: 13.3333px;"
class="">3) When the spine goes (0,0,0)-(1,1,0)-</span><span
style="font-size: 13.3333px;" class="">(1,1,0)-</span><span
style="font-size: 13.3333px;" class="">(1,1,0)-(2,0,0),
what is the CSP for the three middle points?</span></div>
</div>
<br class="">
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background-color: rgb(255, 255, 255);">--<span
class="Apple-converted-space"> </span><br class="">
<font class="tahoma,arial,helvetica san serif"
color="#333366"><font class="" size="+1"><b class="">Leonard
Daly</b></font><br class="">
3D Systems & Cloud Consultant<br class="">
X3D Co-Chair on Sabbatical<br class="">
LA ACM SIGGRAPH Chair<br class="">
President, Daly Realism -<span
class="Apple-converted-space"> </span><i class="">Creating
the Future</i></font></div>
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<br>
<br>
<div class="moz-signature">-- <br>
<font class="tahoma,arial,helvetica san serif" color="#333366">
<font size="+1"><b>Leonard Daly</b></font><br>
3D Systems & Cloud Consultant<br>
X3D Co-Chair on Sabbatical<br>
LA ACM SIGGRAPH Chair<br>
President, Daly Realism - <i>Creating the Future</i>
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