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<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Hello Russ and all,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Strictly speaking, the specification allows the browser to err
towards the value “TRUE”, i.e. emit a “TRUE” event when
the VisibilitySensor is actually invisible. But nevertheless, thank you for reporting
this issue. It seems to be easy to fix, so we will probably fix it in the next
Cortona release.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>Regarding Script nodes: the specification explicitly states that
the Script should continue working if it is in “invisible” sections
of the scene graph, for example, in a disabled branch of a Switch. I think that
this applies to inactive branches of a LOD as well.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
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<p class=MsoNormal align=right style='margin-left:72.0pt;text-align:right;
text-indent:36.0pt'><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>
Sergey Bederov<o:p></o:p></span></p>
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<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Arial","sans-serif";color:navy'><o:p> </o:p></span></b></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
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<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
www-vrml-bounces@web3d.org [mailto:www-vrml-bounces@web3d.org] <b>On Behalf Of </b>Russ
Kinter<br>
<b>Sent:</b> Wednesday, September 23, 2009 12:05 AM<br>
<b>To:</b> x3d-public@web3d.org; 'vrml'<br>
<b>Cc:</b> 'FreeWRL X3D/VRML Viewer'<br>
<b>Subject:</b> [WWW-Vrml] VisibilitySensor in LOD Level Browser Tests<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Hi,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I
have been doing some testing of including a VisibilitySensor as a member of the
first level of the LOD Node to control an animation. The idea is that the
animation won’t start until the animated geometry appears in the range of
the LOD.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>The
VisibilitySensor is grouped with this geometry.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>The
results work similar to a ProximitySensor. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>This
method should work according to “The Annotated VRML 97 Reference
Manual” at <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'><a
href="http://www.cs.vu.nl/~eliens/documents/vrml/reference/CH3.HTM#VisibilitySensor">http://www.cs.vu.nl/~eliens/documents/vrml/reference/CH3.HTM#VisibilitySensor</a>
:<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>“If
<i>enabled</i> is TRUE, the VisibilitySensor node detects changes to the
visibility status of the box specified and sends events through the <i>isActive</i>
eventOut. A TRUE event is output to <i>isActive</i> when any portion of the box
impacts the rendered view. A FALSE event is sent when the box has no effect on
the view. Browsers shall guarantee that, if <i>isActive</i> is FALSE, the box
has absolutely no effect on the rendered view. Browsers may err liberally when <i>isActive</i>
is TRUE. For example, the box may affect the rendering.”<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>If
the VisibilitySensor as a member of a LOD level is currently out of range that
means its box is NOT impacting the rendered view, so its isActive output should
be FALSE.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>This
test world: <a
href="http://www.sevenemeraldtablets.net/VisibilityTest/VisibilityTest2.wrl">http://www.sevenemeraldtablets.net/VisibilityTest/VisibilityTest2.wrl</a>
<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>however
shows mixed results for various browsers.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>There
is a HUD display of the VisibilitySensor and TimeSensor activity. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>The
transparent red cube is both the VisibilitySensor’s box and LOD range
boundary. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Xj3D
and Contact get it right! kudos!.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Vivaty
does initially, but if the user enters box/LOD level and turns on the animation
and then leaves the range<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Vivaty
won’t switch off the animation, so the LOD is ignored after the
VisibilitySensor is activated. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>The
VisibilitySensor seems to work as it should otherwise. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>InstantPlayer
fails in that it will not shut off the VisibilitySensor when it is out of the
LOD range.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>The
LOD has no affect on it and is ignored. The VisibilitySensor works as it should
otherwise.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>CosmoPlayer
does the opposite of Vivaty. It makes the VisibilitySensor active on load, but
once the viewer enters the range<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>and
leaves, then the test works just like it should.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>FreeWRL
works initially, but once the LOD range is entered and the VisibiltySensor is
activated, then the VisibiltySensor<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>isActive
TRUE no matter what –even when the red box is out of sight and out of
mind.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Clicking
on the cones to change viewpoints FreeWRL puts the user at the wrong
coordinates. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Cortona
5.1 fails completely. The VisibilitySensor isActive TRUE no matter what -even
if the user is completely turned away.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>OctagaPlayer
fails too in exactly the same way.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thanks!</span><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Russ
Kinter</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>"All
the fires of Cain's motivation cannot burn a love that's sound." - Stacy
Sutherland</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
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