> Peter Klinge wrote:
>> Hi,
>>
>> I'm using Graphics.DrawLines (Pen, PointF[]) to draw a long curve with
>> thousands of points - works perfectly on printers.
>> Now I have found, that the preview functionality seems to have problems,
>
> What kind of problems?
>
>> if I pass more than 6000 or 7000 points. Now I'm a bit concerned, that
>> there are different limits for different printers, Windows versions,
>> ... Unfortunately I haven't found any hint, that there is a limit for
>> the number of points.
>> Has anyone found similar problems or has anyone a hint for that limit
>> or has anyone a hint, how to ask the graphics engine, how many points
>> could be processed.
>>
>> Peter

"Peter Klinge" <i@i.i> wrote in message
news:ucJHUAXhGHA.1324@TK2MSFTNGP04.phx.gbl...
> Göran Andersson schrieb:
>> Peter Klinge wrote:
>>> Hi,
>>>
>>> I'm using Graphics.DrawLines (Pen, PointF[]) to draw a long curve with
>>> thousands of points - works perfectly on printers.
>>> Now I have found, that the preview functionality seems to have problems,
>>
>> What kind of problems?
>>
>>> if I pass more than 6000 or 7000 points. Now I'm a bit concerned, that
>>> there are different limits for different printers, Windows versions, ...
>>> Unfortunately I haven't found any hint, that there is a limit for the
>>> number of points.
>>> Has anyone found similar problems or has anyone a hint for that limit or
>>> has anyone a hint, how to ask the graphics engine, how many points could
>>> be processed.
>>>
>>> Peter
>
> If I pass more than 6000 or 7000 points, the curve will not been drawn.
> Also it seems, that the graphics object is destroyed (or what ever) - no
> further drawing operations in the same print job (the same page) will be
> done.
> As the result I see an incomplete page, where all graphic elements are
> visible, I have drawn before that operation, but all elements after that
> operation aren't visible.
>
> Peter

> Is any exception thrown or does the operation just seem to stop?
>

> Hi Peter,
>
> Well its been a while and I can't remember the details but I have definitely
> have had issues where adjacent points were the same or mapped to the same
> device point under a transform. Otherwise it would be easy enough to split
> your long curves up into smaller sections to test the length limit theory.
>
> Cheers
> Doug Forster
>
>

"Peter Klinge" <i@i.i> wrote in message
news:eKtw5eihGHA.4304@TK2MSFTNGP05.phx.gbl...
> Bob Powell [MVP] schrieb:
>> Is any exception thrown or does the operation just seem to stop?
>>
>
> No, there isn't any exception. The operation of printing one page stops at
> the point of calling DrawLines with more than appr. 7000 points. The
> result is a incomplete printed page.
>
> Peter

> know, if the limit is depending from environment. And so I don't know, if
> the limit found on my PC is a general limit for all PC's at customers,
> where our program will be used. That's why this isn't a point for me.

> I think this would be a problem with the printer driver. I need to run some
> tests to see if anything like this happens on screen.
>
> Have you tried it on several printers?
>

> Hi Peter,
>
>> know, if the limit is depending from environment. And so I don't know, if
>> the limit found on my PC is a general limit for all PC's at customers,
>> where our program will be used. That's why this isn't a point for me.
>
> Yes I can understand that, but have you actually determined that the
> problem -is- actually a point limit (even if only valid in your own
> environment)? In other words do you have a set of points that fails to draw
> in one hit but which will draw when split into two parts using exactly the
> same set of points. I was trying to make the point there -may- be other
> factors at play.
>
> Cheers
> Doug Forster
>
>
>
>