Hi J-S, I guess its related to my computation of clamped projection matrix. I need to compute this matrix myself as its not yet computed when I cull shadows. It is computed at the end of whole traversal. I copied clamping code from osgSim::OverlayNode. I guess that for this computation I may somehow use default clamp callback nearFarRatio. Put a breakpoint in line 255 in MinimalShadowMap.cpp. This is the line where clampProjectionMatrix is called and check what is the nearFarRation inside this call. Let me know what you find. I think I did it right, so there is chance the error may be somewhere else.
Cheers,Wojtek -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Jean-Sebastien Guay Sent: Monday, September 29, 2008 9:28 PM To: OpenSceneGraph Users Subject: [osg-users] LiSPSM and main camera nearFarRatio? Hi all, Hi Wojtek, I've been working on deploying the new LiSPSM in our simulators. While fixing a totally unrelated problem today (when viewing from inside the cockpit, the cockpit geometry was being clipped), I added some parameters to control the nearFarRatio on a camera. I have no idea why, but this seems to have an effect on shadows. More specifically, the shadows are being clipped. The default nearFarRatio is 0.0005, and when I set it just a bit lower, 0.00049, the shadow of the boom (arm) of our crane (when viewed from the cockpit) is clipped. The more I decrease the nearFarRatio, the more the shadows are clipped. I have looked a bit into the code, but since it's not my code, I may have a hard time finding out what is causing this. Off the top of your head, what might cause this? And what would you suggest to fix it (meaning, be able to control the nearFarRatio of my main camera and maintain correct shadows)? For reference, I have set minLightMargin to 100, and maxFarPlane to 5000. Thanks in advance, J-S -- ______________________________________________________ Jean-Sebastien Guay [EMAIL PROTECTED] http://www.cm-labs.com/ http://whitestar02.webhop.org/ _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
