Re: [Flightgear-devel] Near Clipping in the virtual cockpit: please help!!
Curtis, I know, it's a problem solved in FG many years ago :). I know it arises in all simulations and has to be solved in some way. Falcon4 for example apears to be scaling the cockpit model 10x of original size (from what i have seen in the code). Thanks for advice, i will check it! It was also my idea to feature ordered renderinging and switching z-depth depending on the stage, now i have to discover how :D Thanks! -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Near Clipping in the virtual cockpit: please help!!
This issue has already been addressed in the current implementation. Tim used a slave camera to draw the near geometry while the main camera draws the far geometry. Look in CameraGroup.cxx and in /sim/rendering/camera-group/znear properties. There is one camera that draws between /sim/rendering/camera-group/znear (0.1 by default) and /sim/rendering/camera-group/near-field (100 by default) and the other between /sim/rendering/camera-group/near-field and /sim/rendering/camera-group/znearzfar (12 by default) Regards, -Fred - Paul Guhl a écrit : Curtis, I know, it's a problem solved in FG many years ago :). I know it arises in all simulations and has to be solved in some way. Falcon4 for example apears to be scaling the cockpit model 10x of original size (from what i have seen in the code). Thanks for advice, i will check it! It was also my idea to feature ordered renderinging and switching z-depth depending on the stage, now i have to discover how :D Thanks! -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel -- Frédéric Bouvier http://www.youtube.com/user/fgfred64 Videos -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Near Clipping in the virtual cockpit: please help!!
Hi Paul, Here is an interesting link that explains the core of the problem. http://www.sjbaker.org/steve/omniv/love_your_z_buffer.html It's been a while, but one technique for dealing with this is to clear the zbuffer and reset the near plane location when drawing different portions of the scene. This can work well if you can divide up your scene into stuff that is further away (like terrain) and stuff that is closer (like the cockpit) and then carefully pick the order you draw the different portions of your scene graph. Regards, Curt. On Thu, Feb 10, 2011 at 1:04 AM, Paul Guhl ad...@simtechnologies.de wrote: Hello! I have unsolved problem driving me nuts for weeks now. In my opengl application the terrain presentation is flickering very frequently (either as whole our 1/3 of all polygons). The problem disappears as soon as i increase the near clipping value. The problem root is the z buffer precision, but greater near clipping in turn truncates much of the virtual cockpit display. How did you solve the clipping problem in flight gear??? Thanks in advance Paul -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel -- Curtis Olson: http://www.atiak.com - http://aem.umn.edu/~uav/ http://www.flightgear.org - http://www.flightgear.org/blogs/category/curt/http://www.flightgear.org/blogs/category/personal/curt/ -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] Near Clipping in the virtual cockpit: please help!!
Hello! I have unsolved problem driving me nuts for weeks now. In my opengl application the terrain presentation is flickering very frequently (either as whole our 1/3 of all polygons). The problem disappears as soon as i increase the near clipping value. The problem root is the z buffer precision, but greater near clipping in turn truncates much of the virtual cockpit display. How did you solve the clipping problem in flight gear??? Thanks in advance Paul -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
