Sorry onr further question, i am adopting you suggestion of redrawing the grid, being a flash novice, and never having worked with a 'persistant" display list before, what is the quickest way to draw, and redraw lots of grid lines for every map movement?
using polygons isntead of lines, as I am after a hex map. options I have thought off: clearing the whole screen and redrawing everything every change. (could be slow?) drawing all the lines and using viable true / false to switch on the one in view having a fixed number of lines, and updating there position to ensrure the veiwport is covered. (although I am having troble ceating an array of polygons) thansk Ben On Jan 7, 1:22 pm, BenP <[email protected]> wrote: > Yes, thanks, i have just read up on Mercator, and its distortions > (greenland teh size of africa), idealy I would like an equal area > projection, but failed to find one, however since I don't have to be > that accurate the Marcator one will do (might chop of the poles, as > they are not really important to me). > > I am having a challenge with Mercator, b\and a 3D map but will add > that as a seperate thread. > > thanks ben > > On Jan 7, 10:09 am, Jonathan Wagner <[email protected]> wrote: > > > Ok, I thought that's what you might be trying to do. What I would > > recommend is that you redraw the grid every time the view is changed > > or rendered only for the viewport. Though I would suggest as you zoom > > out you block off bigger areas, because a 100km grid when you're > > zoomed all the way out would be something like 4000 lines. However > > before you dive into this there is something you should be aware of, > > your grid will not look like a grid, because of the Mercator > > projection the squares will actually distort as you approach the north > > and south pole. > > > Jonathan > > Scribblemaps.com > > > On Jan 6, 4:13 pm, BenP <[email protected]> wrote: > > > > thanks for the reply, but I don't think Tile Overlays will work, I > > > want the overlay to remain constant land area, not screen area. > > > I am looking to draw a grid with a fixed, real world size, lets say > > > 100 km square, that remains at a constant 100km-sq regardless of map > > > zoom. > > > > I could draw a huge overlay for the whole globe, but this has to be > > > very high rez to look any good, and seems wasteful given I am using a > > > repeating grid pattern. > > > > Obvioulsy the real world area of a tile changes drastically with zoom, > > > as they are reative to screen space. > > > > Thansk Ben > > > > On Jan 7, 7:54 am, Jonathan Wagner <[email protected]> wrote: > > > > > TileOverlays should work for you, it depends on how you want the grid > > > > to be. For instance if you create a tile overlay that draws a red > > > > outline box the size of 256x256 and overlay it on the map, you will > > > > see red boxes around each of the tiles. Tile overlays only temporarily > > > > scale if you have continuous zoom enabled on the map. > > > > > Jonathan > > > > Scribblemaps.com > > > > > On Jan 6, 4:18 am, BenP <[email protected]> wrote: > > > > > > New to the API so this may be a stupid question, but is it possible to > > > > > create an overlay that tiles? I have looked at tile overlays, but > > > > > these scale with zooming which beraks the result, I want a tiling full > > > > > map overlay, so i can place my own grid upon it. > > > > > > thanks > > > > > Ben
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