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Re: [Rails-devel] Background Maps
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From: Erik V. <eri...@xs...> - 2011-06-06 10:55:45
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I have found the Batik JSVGCanvas approach to be promising. The main problem is the lack of any good documentation, tutorials or how-to's on the functionality that we need, and the Javadocs aren't very helpful either. After searching during the better part of yesterday, I found some pointers on high Google page numbers that finally put me in the right direction. Some observations: - The 18EU map loads faster, though not at lightning speed. The map is big (~800K), XML parsing is notoriously slow, and I suspect initial SVG rendering also is. - The speed of tile drawing is about back to normal. - Best of all: no more crashes. That really tips the balance for me. - Zooming works, but the zoomed map and tiles do not align yet. Tiles are still drawn the old way, in a different layer, and using separate coordinates. Alignment currently is a trial-and-error exercise that apparently does not survive zooming. The obvious follow-up is to see if tile drawing can also be moved to the JSVGCanvas. I suppose this will amount to manipulating the underlying DOM. I'll probably postpone that until a later stage. My intention is to commit the new code pretty soon (using the map will remain optional). First I want to give post-zooming alignment a few more tries. I'll probably also include Bill Rosgen's suggestions to change hex highlighting. Erik. > -----Oorspronkelijk bericht----- > Van: brett lentz [mailto:bre...@gm...] > Verzonden: vrijdag 3 juni 2011 20:59 > Aan: Development list for Rails: an 18xx game > Onderwerp: Re: [Rails-devel] Background Maps > > That sounds like a very possible option. If we can let Batik handle all of the > image processing internally, that sounds like a win to me. > > ---Brett. > > > > On Fri, Jun 3, 2011 at 11:56 AM, Erik Vos <eri...@xs...> wrote: > > This stuff is mostly new to me, but on a first look into Batik, I wonder if we > could use the Batik Swing interface. > > Should we change the map into a JSVGCanvas? > > > > Or two? Because, to achieve displaying the map *below* the tiles, I had to > insert a JLayeredPane, with the map on layer -1 (bottom) and the tiles on > layer 0 (top). Without that layered pane, it turned out the other way around > (don't know why). > > > > Erik > > > > P.S. I changed the subject of this thread. > > > >> -----Oorspronkelijk bericht----- > >> Van: brett lentz [mailto:bre...@gm...] > >> Verzonden: vrijdag 3 juni 2011 19:28 > >> Aan: Development list for Rails: an 18xx game > >> Onderwerp: Re: [Rails-devel] 18EU: Background Map submission (revised > >> version) > >> > >> I have a feeling that old drawing code is just incredibly inefficient > >> and adding the map might tip it over into unusability. I'll blame my > >> limited understanding of AWT. It's probably time to refactor a bunch > >> of that. ;-) > >> > >> Some possible places to look for improvements: > >> > >> 1. It looks like we're still using AffineTransforms on the > >> rasterized version of the hex. (A remnant from when we were still > >> using GIF-based tiles. There is likely a way to get Batik to > >> manipulate the vector-based format prior to rasterization in a more > efficient way. > >> > >> Once we rasterize the image, we should avoid changing it. > >> > >> 2. There may be a better way to load the map than with > >> BufferedImageTranscoder. > >> > >> 3. Profiling the code will likely help quickly locate the reason drawing is > slow. > >> It looks like there's some profiling plugins available for Eclipse ( > >> http://www.eclipse.org/tptp/home/downloads/ ), but I'm not sure how > >> well they work. > >> > >> Though, simply adding a few debugging statements starting at paint() > >> or > >> paintComponent() might be sufficient to see how often they're called > >> in a single rendering. It might just be a simple issue of repainting > >> the window more often than we really need to. > >> > >> > >> ---Brett. > >> > >> > >> > >> On Fri, Jun 3, 2011 at 9:02 AM, Erik Vos <eri...@xs...> wrote: > >> > OK, I have attached a patch file that includes all differences. > >> > Hope it's not > >> too big... > >> > The main part is a trimmed version of the 18EU map, with all empty > >> > borders > >> removed (by Inkscape). > >> > I did that in the hope that it would help fixing the crash problem, > >> > but it > >> didn't help at all. But in any case I think it's better to avoid > >> such empty borders. > >> > > >> > Erik. > >> > > >> >> -----Oorspronkelijk bericht----- > >> >> Van: brett lentz [mailto:bre...@gm...] > >> >> Verzonden: vrijdag 3 juni 2011 16:54 > >> >> Aan: Development list for Rails: an 18xx game > >> >> Onderwerp: Re: [Rails-devel] 18EU: Background Map submission > >> >> (revised > >> >> version) > >> >> > >> >> On Fri, Jun 3, 2011 at 5:43 AM, Erik Vos <eri...@xs...> wrote: > >> >> > I would like to give other people a chance to play with this new > >> >> > stuff, but I'm not sure if I should commit my changes to the SVN > >> >> > trunk. Perhaps we should create a branch for this experimental > >> >> > feature (but I have no clue how to do that - I've never done > >> >> branching before). > >> >> > On the other hand, I have already added a configuration property > >> >> > to completely suppress the use of SVG maps, so probably no harm > >> >> > would be done by putting this code into the trunk anyway. > >> >> > > >> >> > Suggestions? > >> >> > > >> >> > >> >> Post your implementation to the list as a set of diffs. Perhaps > >> >> just a second set of eyes can help spot the issue. > >> >> > >> >> > Erik. > >> >> > >> >> ---Brett. > >> >> > >> >> ------------------------------------------------------------------ > >> >> --- > >> >> --------- Simplify data backup and recovery for your virtual > >> >> environment with vRanger. > >> >> Installation's a snap, and flexible recovery options mean your > >> >> data is safe, secure and there when you need it. Discover what all > >> >> the > >> cheering's about. > >> >> Get your free trial download today. > >> >> http://p.sf.net/sfu/quest-dev2dev2 > >> >> _______________________________________________ > >> >> Rails-devel mailing list > >> >> Rai...@li... > >> >> https://lists.sourceforge.net/lists/listinfo/rails-devel > >> > > >> > ------------------------------------------------------------------- > >> > --- > >> > -------- Simplify data backup and recovery for your virtual > >> > environment with vRanger. > >> > Installation's a snap, and flexible recovery options mean your data > >> > is safe, secure and there when you need it. 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Discover what all the > cheering's about. > >> Get your free trial download today. > >> http://p.sf.net/sfu/quest-dev2dev2 > >> _______________________________________________ > >> Rails-devel mailing list > >> Rai...@li... > >> https://lists.sourceforge.net/lists/listinfo/rails-devel > > > > > > ---------------------------------------------------------------------- > > -------- Simplify data backup and recovery for your virtual > > environment with vRanger. > > Installation's a snap, and flexible recovery options mean your data is > > safe, secure and there when you need it. Discover what all the cheering's > about. > > Get your free trial download today. > > http://p.sf.net/sfu/quest-dev2dev2 > > _______________________________________________ > > Rails-devel mailing list > > Rai...@li... > > https://lists.sourceforge.net/lists/listinfo/rails-devel > > > > ------------------------------------------------------------------------------ > Simplify data backup and recovery for your virtual environment with > vRanger. > Installation's a snap, and flexible recovery options mean your data is safe, > secure and there when you need it. Discover what all the cheering's about. > Get your free trial download today. > http://p.sf.net/sfu/quest-dev2dev2 > _______________________________________________ > Rails-devel mailing list > Rai...@li... > https://lists.sourceforge.net/lists/listinfo/rails-devel |
