| Object/Direct Graphics Question [message #29367] |
Tue, 12 February 2002 21:56  |
parrhasius
Messages: 2
Registered: February 2002
|
Junior Member |
|
|
I've gone back and read all the posts I could find on object graphics
vs direct graphics and I still can't decide which one is better for
what I'm trying to do. Does object graphics have any advantages at
all for working in 2D? The general consensus, at least a year ago,
seemed to be that it was best to use direct graphics for this kind of
thing, but RSI's own XROI program is written using object graphics.
Since it's a 2D drawing program, would it have been better/faster/more
maintainable if it were written using direct graphics and object
programming techniques, as David Fanning likes to suggest?
The program I'm writing is not much more complex than XROI: I need to
plot, manipulate and erase maybe 10 ~100-vertex polylines on top of
~640X400 images, but there is an order to the display of the
polylines--some of them must always be drawn on top of others, etc,
and when one is erased anything underneath it must be restored. So
what's faster: a call to TV and then 10 100-vertex PlotS calls in
direct graphics, or drawing an IDLgrImage and then drawing 10
100-vertex IDLgrPolylines in object graphics? More to the point,
since drawing such a simple system is probably fast enough using both
methods, which graphics option makes more sense given this problem?
Thanks for any help.
|
|
|
|
comp.lang.idl-pvwave archive
Members
Search
Help
Login
Home
