Larry Becker a écrit : >SS, > > I didn't find it necessary to do special (i.e. wireframe) rendering >when doing mouse wheel zooming since worse case render times are now >so short in SkyJUMP, and anyway the renderer doesn't block the UI, >whereas the zoombar renderer is modal and blocking. Mouse wheel >zooming works even in the quasimodes (anytime the zoom tool is >showing). > > Hi, I definitely should have had a look to your mousewheel zoom before improving the zoombar. That time, I was decided to fix the bug first, next time, may be I'll do the other way :-)
> The Zoom Realtime tool in SkyJUMP uses raster stretching to give a >much smoother zoom preview than the "flashy" wireframe zoom. > > So many ways to zoom ! Finally, what is the prefered way to zoom in and out from your user point of view : simple zoom, zoombar, mousewheel zoom or realtime zoom ? Michaël >regards, >Larry Becker > > >On 5/29/07, Sunburned Surveyor <[EMAIL PROTECTED]> wrote: > > >>Michael wrote: "I did not do much comparisons between jump versions >>but identified >>several bottlenecks in zoombar code and just committed an optimized >>version : >>1 - I prevent the renderer to display invisible layers as wireframes >>during mouse dragging >>2 - I used Larry's coordinate's decimator to render features as gray >>wireframes (I made the decimator's resolution a Java2DConverter property >>to use a special 2 pixel wide resolution for the wireframe display) >>3 - Instead of displaying 100 random geometries as wireframe, I display >>200 geometries choosen for their bigger size and so I get a better >>feedback (the way geometries were choosen, with a 10000 points dataset >>and another 100 polygons dataset, I get only one or two polygons on the >>screen during mouse dragging)." >> >>This sounds like awesome work Michael! >> >>Michael wrote: "May be it would have been cleaner to create a special >>renderer for the gray wireframe renderering..." >> >>This is an interesting idea. I had set up my pluggable renderer to >>select a custom renderer based on the type of object being rendered, >>not on the "mode" that OpenJUMP was in. I'm not sure how I would >>select a custom renderer based on the "mode" of OpenJUMP, but I'll >>think some more about it. (By "mode" I mean something like "OpenJUMP >>is in mouse wheel or scale bar zoom mode.") >> >>Michael wrote: "Hope those optimizations will be useful for a mousewheel zoom >>implementation." >> >>I think you are correct about this. I was hoping to enable mouse wheel >>zoom with my work on the cursor tool framework, so this will be of >>interest to me. I think Larry Becker has already done some work like >>this. I wonder if he implemented the types of optimizations we are >>discussing. >> >>The Sunburned Surveyor >>On 5/27/07, Michaël Michaud <[EMAIL PROTECTED]> wrote: >> >> >>>Hi, >>> >>>I did not do much comparisons between jump versions but identified >>>several bottlenecks in zoombar code and just committed an optimized >>>version : >>>1 - I prevent the renderer to display invisible layers as wireframes >>>during mouse dragging >>>2 - I used Larry's coordinate's decimator to render features as gray >>>wireframes (I made the decimator's resolution a Java2DConverter property >>>to use a special 2 pixel wide resolution for the wireframe display) >>>3 - Instead of displaying 100 random geometries as wireframe, I display >>>200 geometries choosen for their bigger size and so I get a better >>>feedback (the way geometries were choosen, with a 10000 points dataset >>>and another 100 polygons dataset, I get only one or two polygons on the >>>screen during mouse dragging). >>> >>>May be it would have been cleaner to create a special renderer for the >>>gray wireframe renderering... >>> >>>Hope those optimizations will be useful for a mousewheel zoom >>>implementation. >>> >>>Michaël >>> >>>Larry Becker a écrit : >>> >>> >>> >>>>Hi Michaël, >>>> >>>>Here is Stefan's post about the problem. The polygons must be very >>>>large to prevent the simplification logic of zoombar from working. >>>> >>>>Stefan: >>>> >>>> >>>>>I loaded a large shp file with 16 very large polygons (> 5000 points) >>>>>and zoom to full extent. >>>>>When i moved the slider of the zoom bar (zooming out) the systems does >>>>>nothing (is blocked) for more than 30 seconds (or even more). >>>>>If make the same thing with an older version of jump it takes one 2 sec >>>>>after seeing the outlines and one sec more for filling. >>>>> >>>>> >>>>Hei Larry, >>>> >>>>Larry Becker schrieb: >>>> >>>> >>>>>Hi Stefan, >>>>> >>>>> 1. Is there somewhere I can get a copy of the shape file to test with? >>>>> >>>>> >>>>i upload it here: >>>> ftp://ftp.geo.unizh.ch/pub/sstein/openjump/brdlaender.zip >>>><ftp://ftp.geo.unizh.ch/pub/sstein/openjump/brdlaender.zip> >>>> >>>> >>>> >>>>> 2. Is the speed up working for other large shape files? >>>>> >>>>> >>>>i have not tested >>>> >>>> >>>>> 3. Does it perform better if you zoom to full extents instead of using >>>>>the Zoom bar. >>>>> >>>>> >>>>yes - (or as usual) >>>> >>>> >>>>> 4. What is the Committed Memory showing after you load the file? >>>>> >>>>> >>>>mhm.. not that much: 11MB >>>> >>>> >>>>> 5. After the blocked behavior, does the Committed Memory go down? >>>>> >>>>> >>>>14 MB >>>> >>>>btw: panning is fine, and if i use Zoom to scale it is fine as well. >>>> >>>>thanx for taking care >>>>stefan :) >>>> >>>> >>>>regards, >>>>Larry >>>> >>>> >>>> >>>------------------------------------------------------------------------- >>>This SF.net email is sponsored by DB2 Express >>>Download DB2 Express C - the FREE version of DB2 express and take >>>control of your XML. No limits. Just data. 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