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).
The Zoom Realtime tool in SkyJUMP uses raster stretching to give a much smoother zoom preview than the "flashy" wireframe zoom. 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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