On Sunday, 9 November 2003 03:22, Norman Vine wrote: > This scheme may not be optimal but a square degree block even though it is > conceptually simple is far from optimal. Remember we are trying to tile a > sphere and squares don't work, esp. if you want anything approximating > an equal area subdivision. FWIW IMO the current scheme is a terrible hack > but ... it works < if you disregard the poles > and is a *major* > improvement over our earlier 'square' tiling.
Well after having given it some thought I can't think of a better way of doing it either. Not that I know that much about projection systems anyway. It does make the scenery building more complex because you have to keep track of how many columns are in the tile you are currently working on. Plus you have to resolve the joining between tiles with differering numbers of columns. On the positive side it does solve the problem of squeezing too much data into a tile as you approach the poles. I wonder if TerraGear does automatic texture scaling based on lattitude ... > This is one area that > several of us have always intended to go back and rethink but ... it has > seemed to be work well enough and there are always more pressing things > todo :-) Yip, we must not neglect the other areas. Paul _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
