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Draw A surface between 2 sinus cuves qwt

  • hello guys,
    i would love to draw the surface between à two sinus curves. the two sinus curves have the same base of time it mean the x of first point of my two sinus are the same .
    so how can i do that? my idea is to draw a bunchs of lines between the 2 sinus points but i didn't find a function in the qwt that allow me to draw lines between two point that have the same x and different y .

    if you have a better idea i would love to listen to it .

    thanks for your respond guys .

  • the grey part is the kind of surface I want to draw


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