How to get the Z-Values out of the rasterviev example??

[Harry]

Hi @ all,

First of all, im new to Qt, Qwt and Programming.
So my Problem is:

I have a Matrix which i have uploadet to the Qwt rasterview example. I have also implemented a QwtPlotPicker.
Now with the QwtPlotPicker i am able to get the Position values by draging a Line from Point A to B but instead i would like to get the Matrix intensity Values of the Colormap from A to B and Plot them with QwtPlotCurve.

Any suggestions for me how to handle this?

Thx for your Support.

[Uwe]

The picker returns a position in plot coordinates. Using your raster data object you can find the z-value at that position.
If you are really interested in the RGB value ( not the z-value ) you could pass the calculated value to the color map.

[Harry]

Hi Uwe,

thank you for the answer!

I'm sorry but i don't really get that?
What is my raster data object, do i have to initialize one? Maybe you have an example code? That would help me a lot..

Thx

[Uwe]

In the rasterview example it is the class "RasterData".

Uwe