Help me with graphics!
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Hello! Please tell me the way of solving the following problem.
I need to display 2-D scene. The data I need to visualize are data from amateur radar:
1st layer: is a coordinate grid;
2nd layer: two-dimensional matrix of 4096 X 1200, the value of which will be specially interpreted and displayed as pixels (dots) with the corresponding coordinates;
3rd layer: service information, which is also a special way interpreted and displayed as icons, icons with acc. coordinates (500-800 sites);
Layer number 2 is often updated on a signal from another thread that is processing the data. The entire scene must be able to scale to scroll.The program is written using Qt under Linux. Criterion: maximum performance.
What Qt's tools I can choose to solve the problem?
Do I need to pay attention to OpenGL technology, or is it redundant for my problem? -
OpenGL does not seem necessary here, although it's certainly an option. Qt's raster engine is also very fast.
There are number of ways in which this can be implemented: QGraphicsView, standard painting with QPainter, QML, QML Canvas element, and more. I can't really say which is best for your case. It would be very easy to prototype in QML. Other solutions will be tougher, but will offer more low-level control. The decision is yours, really. Performance-wise, all those are pretty fast, you would need to construct some benchmarks to see the difference.
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[quote author="wspilot" date="1354874209"]If you consider for the future to also create a Web version, add 3D viewing (terrain/height), lighting, etc., you might consider OpenGL ES.
If so, let me know, for I have much that stuff available in my Open Source (aircraft navigation) project.[/quote]
Hi, could you provide a link or something, would be nice to have a look :) -
[quote author="terenty" date="1354875735"]
[quote author="wspilot" date="1354874209"]If you consider for the future to also create a Web version, add 3D viewing (terrain/height), lighting, etc., you might consider OpenGL ES.
If so, let me know, for I have much that stuff available in my Open Source (aircraft navigation) project.[/quote]
Hi, could you provide a link or something, would be nice to have a look :)
[/quote]
Sorry, I missed your reply.
The project is "pilotnavigator":http://sourceforge.net/projects/pilotnavigator/
The oglwindow.cpp contains the (Qt)Gl stuff, esp. the OGLWindow::draw function.
