James Turner <zakal...@mac.com> wrote: > > Onwards with fixing the fgfs-construct crashes!
I have had pretty good luck building complex scenery with a modified version of fgfs-construct. Here is what I did: Following advice by Peter Sadrozinski here on the list, I started from the code in papillon's terragear repo where GPC is replaced by clipper. I then applied a few patches, reducing various "epsilon" constants in the code which I think were too loose and caused inconsistencies in the clipper. You can find my code here (in the branch "custom_scenery_clean"): https://gitorious.org/~maximeguillaud/papillon81/maxime-terragear-cs/commits/custom_scenery_clean More specifically, the patches relevant to fgfs-construct are in commits 81a78602e09b67edd58b2cedacf09079239b0177 and 8601f66cf7cf00ffda38f57cee77ae991c42dab8. The second one uses the constant "SG_EPSILON" defined in Simgear. I reduced the value of this constant in simgear/constants.h: #define SG_EPSILON (DBL_EPSILON*10) (Note that I am using a different installation of Simgear for terragear and for fgfs, so I do not know if this change would have consequences on fgfs). With the above settings, I was able to process large amounts of scenery without any crash. So far I have tried a band covering Europe between 12 and 14 degrees East, i.e. going through Sicily, Italy, the Austrian Alps, the Czech Republic and Germany, Sweden and Norway, up to 69 degrees North. My scenery includes detailed terrain (fitted with 15m accuracy), the CORINE land cover, and OSM rail and roads up to the secondary network. The latest update in the BTG format seem to have fixed the "swirlies". You can see a few screenshots here: http://www.mguillaud.net/fg/scenery-gallery/ The only problem that prevents me from calling it final and generating custom scenery for all of Europe can be seen in the last screenshot: http://www.mguillaud.net/fg/scenery-gallery/fgfs-screen-008.png Sometimes, one polygon will have the correct shape but the material is wrong, and it appears all gray. This seems to occur only around roads. Any advice on this is appreciated. I had a chat with Martin Spott (hi Martin !) a few days ago and he mentioned that the bug is known, and proceeded to explain it to me, however I have not been able to relate his explanation to the code in fgfs-construct. I can provide a minimal set of files (3 roads) that trigger this problem, in case anyone can help with the debugging. Maxime ------------------------------------------------------------------------------ RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
