>>> Its a massive model (spans over 2 km/units in Blender) but has >>> not impacted framerate too much (yet)...still a lot of texturing >>> to do, but getting there... >>> >>> Kind regards, >>> >>> Chris Wilkinson, Brisbane, Australia. >>> >>> >>> >> How are you finding the registration between the location of the models >> and the terrain mesh? >> > > Incredibly difficult, to say the least. Knowing the zero point of > the model is fine, but to have something to reference that against > has been my trouble. The Brisbane CBD is highly constrained by the > Brisbane river, but the flightgear terrain representation of the river > is almost useless. Where the real river has subtle curves over a few > hundred metres the fg terrain has 2 coarse zigzags that are about 100 > metres too wide. That has made placing the model nearly impossible, and > I think I will need to find a georeference on a couple of buildings to > accurately place and rotate that model... > > Its only roughly in place, and until I can get better data it will stay > like that. Even when I place it accurately some buildings will sit in > the river, because I cannot get the tools working to fix that... > > > Hi Chris, I have found two things that make placing objects difficult; - the algorithm used to reduce the triangle count from the base data can eliminate significant landmarks eg Somes Island in the middle of Wellington Harbour disappears in the 0910 scenery. IIRC the algorithm eliminates vertices based on the elevation of vertices compared to those around them. If the elevation difference is below a threshold then the vertice is eliminated. In a tile that covers comparatively rugged terrain the effect of this is more pronounced (the Wellington tile has four fault valleys traversing it!). - there seems to be a N-S offset that shifts the landmass to the south. This results in NZWN protruding into the harbour at the northern end (where in fact there is approximately 100m of land between the end of the runway and the sea) http://denemaxwell.dnsdojo.net/users/ALBUM/Virtual%20Air-line/slides/737-300-FG.html and the southern end of the runway has land between the end of the runway and the sea ( when in fact it does protrude into Lyall Bay). I am guessing this is a function of latitude as it seems less pronounced closer to the equator.
It will be interesting to see the effect of the landcover database on both yours and my observations. Keep the screenshots coming Chris, I add them to the; http://denemaxwell.dnsdojo.net/users/ALBUM/Australia-Scenery/index.html page every time a new one comes out. Cheers Dene NZWN http://denemaxwell.dnsdojo.net ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Flightgear-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/flightgear-users
