I had asked about this more than a year ago, and the answer was that my basic method seemed correct. However I was never able to resolve the issue, and now it has come up again. I am trying to detect, and thereby ignore, invisible lines.
However, when trying to read either stroking (or nonstroking) colors of the lines, I am getting that all the colors are always 0.0. You had previously requested a PDF and some code in order to do anything more. Attached is: 1) a pdf that has a lot of invisible lines. 2) the core pieces of my Java code to process lines. 3) a listing of the lines found in this PDF. 4) a screenshot of examining a PDFGrahicsState object in the eclipse debugger on a call to lineTo(), showing that all the colors I can get are 0.0. Thanks for your help
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