Ralf Gerlich wrote: > Currently we have tile borders that are representable as polygon - more > strictly as rectangles - which makes clipping easy. The new tile borders > could not be well-approximated using polygons. We could try creating > clipping polygons that approximate the borders down to an error of > SG_EPSILON, but I'm not sure if that is practicable.
We could also define the tiles to be non-rectangular, but - as Lee mentioned - trapezoidal resp. as triangular. The width of the northern edge would be cos(nlat) and the width of the southern edge would be cos(slat), with nlat being the northern latitude of the tile and slat being the southern latitude of the tile. Cheers, Ralf ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
