Hi,
This looks like you are using LispSM vraiant based on computation of Draw
Bounds around rendered scene. Draw Bounds means that result of Draw phase ie
prerenderd depths of the scene is used to compute volume of scene which will
receive shadows. Debug HUD in lower left corner displays two squares:
shadow map and prererenderd depth map of the scene. First square also
contains projected silhouette of the initial rough bounds of scene volume
(pink wireframe area) and final optimized draw bounds computed by scanning
prerendered image (orange wireframe afar). Look at osgShadow example
with --lispsm --debugHUD options to see how this debug outputs may look like
when all goes well.
Since both debug squares in your screenshot are completely transparent and
there is no orange wireframe, it looks like both shadow map and depth
prerender map were not drawn at all.
Usually there are problems with applying shadow map but in your case shadow
map seems to be not rendered. Its hard to say by looking at screenshot what
could be wrong here. Have you tried other shadow techniques ? Maybe they
are giving better results ?
Cheers,
Wojtek Lewandowski
-----Oryginalna wiadomość-----
From: Jaap van den Bosch
Sent: Friday, September 30, 2011 12:35 PM
To: osg-users@lists.openscenegraph.org
Subject: [osg-users] OSG Shadow debugging
Hi,
I'm trying to get osgShadow to work with Vizard, an OSG based VR toolkit. I
wrote a plugin which inserts a shadowedScene node and it all seems to be ok,
but the shadows are not there. I made a simple scene (ground, duck and 2
balls) as shown in the first picture. There is one light, pointing down.
For example the LispSM implementation gives the result as shown in the
second picture. I could not find a clear documentation on how to interpret
the debug information on the lower left side.
It seems like the shaders are not functioning properly, but can somebody
point me in the right direction to look for the solution?
Thank you!
Cheers,
Jaap
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=43139#43139
Attachments:
http://forum.openscenegraph.org//files/lispsm_216.jpg
http://forum.openscenegraph.org//files/basescene_124.jpg
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