| Re: Speedup in Object Graphics [message #29753] |
Mon, 18 March 2002 14:00 |
Mark Hadfield
Messages: 783
Registered: May 1995
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Senior Member |
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"Pavel A. Romashkin" <pavel_romashkin@hotmail.com> wrote in message
news:3C962091.F7A5C1B1@hotmail.com...
> lyubo wrote:
>>
>> What are the general ways to speed up a program using Object
>> Graphics ?
>
> Get a faster video card, maybe? They are about $60 now.
I second that. Other possibilities: reduce complexity of your graphics
tree; avoid having large numbers of separate objects; reduce
dimensions of your destination object; reduce dimensions and colour
depth of your screen; experiment with alternative representations
(IDLgrImage vs IDLgrSurface to represent a coloured surface, etc).
>> When I run a profiler report I can see that I have to speed up the
>> WIDGET_PROCESS_EVENTS but I have no idea how to do that.
>
> Do you have a huge, nested widget tree? Then it is not really the OG
> problem, it is the tons of events that slow it down.
Maybe. Or perhaps the graphics tree is being redrawn inside a widget
event handler.
In my experience a widget tree has to get quite complicated before it
takes as long to refresh as it does to redraw a simple graphic.
I think you (lyubo) will have to tell us more about what you are doing
before we can help more.
--
Mark Hadfield
m.hadfield@niwa.co.nz Ka puwaha et tai nei
http://katipo.niwa.co.nz/~hadfield Hoea tatou
National Institute for Water and Atmospheric Research (NIWA)
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| Re: Speedup in Object Graphics [message #29754 is a reply to message #29753] |
Mon, 18 March 2002 09:14  |
Pavel A. Romashkin
Messages: 531
Registered: November 2000
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Senior Member |
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lyubo wrote:
>
> What are the general ways to speed up a program using Object Graphics ?
Get a faster video card, maybe? They are about $60 now.
> When I run a profiler report I can see that I have to speed up the
> WIDGET_PROCESS_EVENTS but I have no idea how to do that.
Do you have a huge, nested widget tree? Then it is not really the OG
problem, it is the tons of events that slow it down.
> Also which one is faster - drawing a scene or drawing several views
> separately?
I always thought that scenes are just containers that loop through draw
calls to their children, and drawing a scene simply spares you several
calls to draw each view separately.
Good luck,
Pavel
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