I too created a plotting class that draws vectors and caches as bitmap for speed (includes cursor readout of coord values, delta display ie. dx, dy between 2 points, lin/semilog, legends, etc...).
Speed was an issue with a dozen waveforms each having 1000 or more points. Vectors were too slow for the standard window refreshes, etc... So I create the vector Group2D once from the raw data & render it into a bitmap; the latter is used in the paint event of the canvas for speed, unless the data change, then the vectors are rebuilt. I can send the opensource class to anyone who's interested. P. On 2/11/07, Norman Palardy <[EMAIL PROTECTED]> wrote:
On Feb 11, 2007, at 11:53 AM, Roger Meier wrote: > The picture quality on screen would be the same, regardless of what > method was used to draw the data. I can see the benefit of having > vector graphics when > exporting the graphics as the pictures would be scalable (not > something I currently need (at least, not yet)). > I'm inclined to give the vector graphics a shot if I can find some > time to work on it, mainly to find out how it compares to the > regular drawing methods in terms of speed. Having already used vector graphics for high res output for printers they are more than up to the task of drawing fast. I open sourced my graphing classes <http://great-white- software.com.hosting.domaindirect.com/GrafThingOpenSource.zip> and used these classes in an application that draws in almost real time. The upside to vector graphics is they do scale well when printed at very high resolution where bitmap graphics do not. They look poor when printed at anything other than the resolution they were created at. However, using vector graphics can be more more work to get all the scaling factors correct. _______________________________________________ Unsubscribe or switch delivery mode: <http://www.realsoftware.com/support/listmanager/> Search the archives: <http://support.realsoftware.com/listarchives/lists.html>
-- ------------------------------------------------------------------------------- Peter K. Stys, MD Professor of Medicine(Neurology), Senior Scientist Ottawa Health Research Institute, Div. of Neuroscience Ottawa Hospital / University of Ottawa Ontario, CANADA tel: (613)761-5444 fax: (613)761-5330 http://www.ohri.ca/profiles/stys.asp ------------------------------------------------------------------------------- _______________________________________________ Unsubscribe or switch delivery mode: <http://www.realsoftware.com/support/listmanager/> Search the archives: <http://support.realsoftware.com/listarchives/lists.html>
