Re: [Dxfreader-info] Dxfreader-info Digest, Vol 1, Issue 3

[Michael C. <mic...@gm...>]

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Will do. Thanks for looking into that for me.

Mike

On Feb 28, 2009, at 10:09 AM, dxf...@li... 
  wrote:

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> Today's Topics:
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>   1. DXFReader with delegates? (Michael Caron)
>   2. entity reading process (Michael Caron)
>   3. Re: DKSimpleDXF (Allan Daly)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 28 Feb 2009 09:37:15 -0600
> From: Michael Caron <mic...@gm...>
> Subject: [Dxfreader-info] DXFReader with delegates?
> To: dxf...@li...
> Message-ID: <262...@gm...>
> Content-Type: text/plain; charset="us-ascii"
>
> Hey list,
>
> thought it might be cool to add delegates to the DXFReader Model
> class. I think that if one wanted to add multi-threading to the
> loader, it would be easier that way. The reader could continue
> reading, calling delegates as it hits things like entities, header
> sections, etc. If the delegate chose to, it could kick off a thread to
> do it's processing on that element. The element would still be added
> to the model for later if so desired, but the processor would have a
> chance to create, say a DK drawing layer and render the element on it,
> while the reader is busy reading. I don't know if it would be all that
> much of a performance gain though and I'd probably want to do some
> profiling before adding it in there, but it's an idea.
>
> It's kind of a cross between what a SAX and DOM parser is to XML. One
> is streaming using callbacks, and the other is model-based. Best of
> both worlds.
>
> Michael
> ------------------------------------------------
> mic...@gm...
> http://techrad.wordpress.com
> http://mrcaron.wordpress.com
>
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> Message: 2
> Date: Sat, 28 Feb 2009 09:45:27 -0600
> From: Michael Caron <mic...@gm...>
> Subject: [Dxfreader-info] entity reading process
> To: dxf...@li...
> Message-ID: <8BD...@gm...>
> Content-Type: text/plain; charset="us-ascii"
>
> Hi list!
>
> Just wanted to make sure that I'm going about loading entities
> correctly. Seems that when I draw them into a DKDrawingLayer, I get
> incorrect directions and line widths (not sure if line widths are part
> of the DXF line entity though).
>
> Process for reading in the DXF File:
> 	BBDXFModel* model = [[BBDXFModel alloc] init];
> 		[model loadDXFString:dxfFileContents];
> 		[model getDXFFileStructure];
> 		[model processEntities];
>
> Process for translating LINE entities into DK lines:
>
> 	BBDXFEntityLine* line = (BBDXFEntityLine*) entity;
> 	
> 	// Ignoring z coordinates for the moment
> 	NSPoint sp;
> 	sp.x = [[line startPoint] x];
> 	sp.y = [[line startPoint] y];
> 	NSPoint ep;
> 	ep.x = [[line endPoint] x];
> 	ep.y = [[line endPoint] y];
> 	
> 	DKDrawablePath* dkline =
> 		[[DKDrawablePath alloc] initWithStartingCoordinate:sp
>                                                   endingCoordinate:ep
>                                                               grid:
> [self gridLayer]];
> 	return [dkline autorelease];
>
> Like I said, it seems that when I render this way, I'm getting weird
> directions, though the lines seem to be spatially correct, that is,
> they are in the right places relative to each other, just sort of
> rotated or something differently. It might be due to an error in
> scaling it to microns, however. I haven't looked too far into it.
>
> I also didn't see anything yet for getting the array of Header
> objects. Am I missing something? I will add it if it's not there. It
> was late... maybe I just totally overlooked it. Important to get
> measurement data from the Header for SonoDraw.
>
> Cheers.
>
> Michael
> ------------------------------------------------
> mic...@gm...
> http://techrad.wordpress.com
> http://mrcaron.wordpress.com
>
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> Message: 3
> Date: Sat, 28 Feb 2009 08:07:59 -0800
> From: Allan Daly <all...@gm...>
> Subject: Re: [Dxfreader-info] DKSimpleDXF
> To: dxf...@li...
> Message-ID: <5DD...@gm...>
> Content-Type: text/plain; charset="us-ascii"
>
> Michael,
>
> Were you able to get the DKSimpleDXF project to build and run  
> correctly?
>
> Your note/problem prompted me to go dig into what caused this issue.
> Back when I switched from using the C++ dxflib library to the home-
> grown DXFReader framework I created a new branch in the Subversion
> directory. The development of both DKSimpleDXF and DXFReader continued
> along substantially and I forgot that I created this branch (oops).
> When I wrapped up the DKSimpleDXF project I used the old trunk and not
> the new branch. That's why nothing made sense to you when you looked
> in there. Anyway ... apologies for wasting your time -- but it was an
> honest mistake at least. I hope I'm not the first one to have made
> that blunder.
>
> I now have my the Subversion repository correctly reconfigured and
> everything right and sane. Along the way I also found the problem with
> not including the Nib files, so that's worked out now too.
>
> I posted a new cleaned-up, much smaller version of the DKSimpleDXF
> project at this link: http://brown-bird.net/Projects/dksimpledxf.html.
> The file is DKSimpleDXF_v.0.1_r2.zip.
>
> Everything should work for you now. Please let me know if you're able
> to get this to build and run so I know if this is the right process to
> use in the future.
>
> -Allan
>
>
> On Feb 27, 2009, at 4:50 PM, Allan Daly wrote:
>
>> I re-zipped and re-posted the DKSimpleDXF archive. Give it a try now
>> and let me know if it works.
>>
>> link: http://brown-bird.net/Projects/dksimpledxf.html
>>
>> -Allan
>>
>> On Feb 27, 2009, at 4:33 PM, Allan Daly wrote:
>>
>>> I was wondering if that would happen. I do not have tons of
>>> experience wrapping up Xcode projects for distribution like this.
>>> Can you give me any tips or advice on how to make sure I get
>>> everything?
>>>
>>> Can you send me the build results error log so I can see
>>> specifically what is missing. In the mean time I'll try to figure
>>> it out and re-post the zip archive.
>>>
>>> I have everything set up to build in the DrawKit directory. Did you
>>> see that and is that working for you?
>>>
>>> -Allan
>>>
>>>
>>> On Feb 27, 2009, at 3:57 PM, Michael Caron wrote:
>>>
>>>> Hi Allan,
>>>>
>>>> I grabbed the source from your site for the DKSimpleDXF and I
>>>> can't get it to build correctly. I'm linking properly with the DK
>>>> project, but what's missing are some png's, the MainMenu.nib
>>>> English (can't even open MainMenu.nib).
>>>>
>>>> Do I need first to grab Graham's test app to get those, sincd DSD
>>>> is based off of that?
>>>>
>>>> Michael
>>>> ------------------------------------------------
>>>> mic...@gm...
>>>> http://techrad.wordpress.com
>>>> http://mrcaron.wordpress.com
>>>>
>>>
>>
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> End of Dxfreader-info Digest, Vol 1, Issue 3
> ********************************************

Michael
- ------------------------------------------------
mic...@gm...
http://techrad.wordpress.com
http://mrcaron.wordpress.com

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