Change base/reference point

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abevig
2010-08-09
2013-05-28
  • abevig

    abevig - 2010-08-09

    Is there a way to change the base point so 0,0 is at the upper left of the document, so that y values increase downwards?

     
  • mtraut

    mtraut - 2010-08-10

    1) If you want to create PDF content with the above property, you can change the "user space" in your content stream, see PDF spec chapter "Graphics", "Coordinate systems". If you use jPod for creating the PDF the corresponding method is "ICSDEvice.transform".

    2) If you want to render "upside down" (with jPodRender)
        a) this is not the correct forum :-)
        b) you simple change the transform before rendering (see examples RenderDoc)

    3) If you want to change the PDF page coordinate system itself, so that for example annotations or other artifacts are measured in this system -> this does not work

    4) if you want something else -> ?

     

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