Hazen Babcock wrote: > Alan W. Irwin wrote: >> On 2009-07-19 01:59-0000 hbabc...@users.sourceforge.net wrote: >> >>> Revision: 10161 >>> http://plplot.svn.sourceforge.net/plplot/?rev=10161&view=rev >>> Author: hbabcock >>> Date: 2009-07-19 01:59:08 +0000 (Sun, 19 Jul 2009) >>> >>> Log Message: >>> ----------- >>> Units are PI/2 not 2/PI. Also change to using the PLplot constant PI >>> instead of 3.14159 >>> >>> Modified Paths: >>> -------------- >>> trunk/drivers/cairo.c >>> >> Hi Hazen: >> >> Obviously, the PI/2 unit is the correct one, but what bothers me is the >> text >> clipping seems the same (good) both before and after this commit. If you >> also cannot spot any visual difference between the two commits, is there >> something that we are missing? > > Probably. The clipping also works better than it does for the svg driver > which is performing a fairly similar operation, rotating the clipping > rectangle around the center of the plot. In the svg driver text section > there is a commented out section that draws the clipping rectangle on > the plot. Adding something like that to the cairo driver might provide > some insight into where the clipping rectangle is located. > > I also planned to poke around in PLplot core to try and figure out > exactly how the text clipping is done for drivers like xwin.
As of v10165 the clipping still looks about the same, but I think I'm doing it the right way now. If I use the svg driver to display the clipping regions on the plots then they seem to line up correctly with edges of the subpage and the axises that define the plot. I added a routine to PLplot core called difilt_clip which is basically a wrapper for the difilt routine. It can be called by a driver to get the coordinates of the transformed text clipping rectangle. -Hazen ------------------------------------------------------------------------------ Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/Challenge _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
