Posts: 3
Registered: ‎08-06-2012
Message 1 of 2 (686 Views)

Incorrect coordinate geometry in dwfx

686 Views, 1 Replies
08-06-2012 10:51 AM

Hi everyone,


I have a problem extracting dwg coordinate geometry from a dwfx file.


Using as an example the W2Dtest sample and the Read2DDWFxFile.cpp file, I get all the Whip coordinates.


For example:


2147467780, 8657

2147468114, 9319


I read in this topic that the coordinates appear correct:




But when I  try to convert this coordinates to the original AutoCAD DWG coordinates, using first:


WT_Matrix xform3d( pGraphicsRes->transform() );
DWFToolkit::smileyvery-happy:WFPaper *pPaper( pEPlotSxn->paper() );
WT_Matrix2D xform;
xform(0,0) = xform3d(0,0);
xform(1,0) = xform3d(1,0);
xform(0,1) = xform3d(0,1);
xform(1,1) = xform3d(1,1);
xform(2,0) = xform3d(3,0);
xform(2,1) = xform3d(3,1);

XAMLFile->definePageLayout(xform, pPaper->width(), pPaper->height(),
pPaper->units() == DWFToolkit::smileyvery-happy:WFPaper::eMillimeters ? .03937 : 1.0 );



and then for each point:


WT_Point3D correctCoord = units.transform_from_DWF_to_application(newPoint); 



i get coordinates like this:


2142.55, 1011.14

2143.25, 1012.54


where I should be getting coordinates like this:


4543646.5803, 9.195

4545674.8390, 8.498



Any ideia what i'm doing wrong? Am I missing something? Any help is appreciated.





Pedro Cruz

Posts: 3
Registered: ‎08-06-2012
Message 2 of 2 (678 Views)

Re: Incorrect coordinate geometry in dwfx

08-10-2012 03:09 AM in reply to: PedroUdjat



I noticed that the the matrix that I get from WT_Units:

WT_Matrix original = units.application_to_dwf_transform();


have some correct values, and some other strange values like 2,89e-14. Is this normal? I could alter the values in the transformation matrix but I don't think that is the correct approach.


And i should be using units.transform_from_DWF_to_application(), not units.application_to_dwf_transform(), because I want the original DWG coordinates, but the output coordinates makes even less sense.


Any ideas? I'm really at a loss here.




Pedro Cruz.




Post to the Community

Have questions about Autodesk products? Ask the community.

New Post
Do you have 60 seconds to spare? The Autodesk Community Team is revamping our site ranking system and we want your feedback! Please click here to launch the 5 question survey. As always your input is greatly appreciated.