Draw Line Overflow Error
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them; it only takes a minute: Sign up What are the hard bounds for drawing coordinates in GDI+? up vote 6 down vote favorite 4 I am rendering an interpolation curve thusly: e.Graphics.DrawLines(new Pen(Color.Red), _interpolationPoints.ToArray()); which sometimes throws an https://social.msdn.microsoft.com/Forums/windows/en-US/9f2b5bba-f725-45c1-9ada-383151267c13/overflow-exception-on-drawline-method-?forum=winforms OverflowException. Examination of the _interpolationPoints array shows some very large values in scientific notation e.g. {X = 0.0 Y = -1.985174E+10} I suspect that Y = -1.985174E+10 is a value that GDI+ cannot handle. That's fine but what are the max/min X and Y values into which I can draw and so constrain the data (and warn the user) rather than catching the overflow exception during paint? Are the limits documented? For example, I would like to do http://stackoverflow.com/questions/3468495/what-are-the-hard-bounds-for-drawing-coordinates-in-gdi something like this: if (yVal < float.MinValue || yval > float.MaxValue) throw new OverflowException("Interpolation value too large to be rendered."); during the population of the _interpolationPoints array and stop the process. (float mix/max does not work btw. i still get the exception.) c# .net gdi+ drawing limit share|improve this question edited Aug 12 '10 at 17:59 asked Aug 12 '10 at 14:02 Paul Sasik 50.2k995154 1 Thanks! Great find. –Agnel Kurian Aug 12 '10 at 17:41 Thanks very much. It's interesting how little info there is about these limitations. Surely I'm not the first person to write code to draw interpolations in GDI+ and needed to catch the edge values. –Paul Sasik Aug 12 '10 at 17:45 @Vulcan: Make sure to check out the answer below. The question above only contains ideas that DID NOT work for the sake of completion. E.g. float.MaxValue IS NOT a valid test of the limit! –Paul Sasik Aug 12 '10 at 17:58 1 I did check out the answer and the article as well. –Agnel Kurian Aug 12 '10 at 18:34 add a comment| 3 Answers 3 active oldest votes up vote 7 down vote accepted OK, I needed to know so I tested incrementally and came up with these limits: positive: 1,073,741,951 negative: -1,073,741,760 The code I used looked something like this: int lastGoodVal = 0; for (int i = -10730
here for a quick overview of the site Help Center Detailed answers to any http://stackoverflow.com/questions/23182768/opencv-error-when-drawing-line-or-rectangle questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow overflow error is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up OpenCV - Error when drawing line or rectangle up vote 1 down vote favorite I'm getting an error when trying to run the following code and have no idea why. draw line overflow This is essentially the exact same code that's used in the tutorials. The error: Traceback (most recent call last): File "cv_trackbar2.py", line 41, in