Hi Rick, Maybe this tutorial could help.
http://www.hybridvisuals.nl/tutorials/quartz-composer-tutorial-7-awesome-line-drawer/ Using a queue and a custom patch he can 'animate' the line. I don't know if this is exactly what you're after, and it does take some custom patches to work. Regards, Charlie On 22 February 2011 05:53, Rick Mann <rm...@latencyzero.com> wrote: > > On Feb 21, 2011, at 21:49:55, Achim Breidenbach wrote: > > > Hi Rick, > > > > with the Google API you can provide those coordinates for a line or a > path. Google will draw it for you at the right place. > > > > http://code.google.com/apis/maps/documentation/staticmaps/#Paths > > The problem with that approach is that I end up loading the image many > times, as I animate the line growing. > > > On problem with the approach drawing the lines by your own is, that you > don't know the lat/long rectangle Google is using in its image. So you can't > match your path long/lat coordinates with the Google map image easily. > > That's okay. I know how to do the map projection, and I think I can figure > out how to scale it properly. But possibly not. > > An alternative would be to write a custom patch to render a web view, and > draw the line in javascript using the Google Maps API. Bleh. > > Hopefully Apple will come out with a native map rendering kit for Cocoa > that downloads map data and renders it locally. Although, in my case, I want > a satellite view. > > -- > Rick > > > > > best, > > > > Achim Breidenbach > > Boinx Software > > > > On 22.02.2011, at 01:23, Rick Mann wrote: > > > >> Thanks to Steve Mokris, I now know how to get a Google Map image and > render it. > >> > >> Now I need to render a line over that image. I have lat & lon that I can > project onto the Google Map segment such that I have x- and y-coordinates > scaled to the image. But how do I draw arbitrary stuff? With each frame, I > need to draw a polyline. > >> > >> Any suggestions? > >> > >> Thanks! > >> > >> -- > >> Rick > >> > >> _______________________________________________ > >> Do not post admin requests to the list. They will be ignored. > >> Quartzcomposer-dev mailing list ( > Quartzcomposer-dev@lists.apple.com) > >> Help/Unsubscribe/Update your Subscription: > >> > http://lists.apple.com/mailman/options/quartzcomposer-dev/achim%40boinx.com > >> > >> This email sent to ac...@boinx.com > > > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Quartzcomposer-dev mailing list (Quartzcomposer-dev@lists.apple.com) > Help/Unsubscribe/Update your Subscription: > > http://lists.apple.com/mailman/options/quartzcomposer-dev/charlief%40cellcastonline.com > > This email sent to charl...@cellcastonline.com >
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