Inner layer keepout and DXF import/export support

On 10/01/10 16:06, Christopher Cole wrote:

Two things I would really like to see:

Please post unrelated topics in separate messages.

1) Inner layer keepout regions, without usign the hack of placing wires to

   force a keepout region.

What we are planning to do is to give signal polygons a new property

that makes them "inverted". This means that an "inverted" polygon is

by itself "invisible" when calculated, but gets subtracted from all

other polygons.

Would that be what you need?

Klaus Schmidinger

--

_______________________________________________________________

Klaus Schmidinger                       Phone: +49-8635-6989-10

CadSoft Computer GmbH                   Fax:   +49-8635-6989-40

Pleidolfweg 15                          Email:   kls@cadsoft.de

D-84568 Pleiskirchen, Germany           URL:     www.cadsoft.de

_______________________________________________________________

On 10/01/10 16:06, Christopher Cole wrote:

...

2) DXF support.  The dxf.ulp to generate DXFs is very poor.

What exactly is "poor" about it?

Klaus Schmidinger

--

_______________________________________________________________

Klaus Schmidinger                       Phone: +49-8635-6989-10

CadSoft Computer GmbH                   Fax:   +49-8635-6989-40

Pleidolfweg 15                          Email:   kls@cadsoft.de

D-84568 Pleiskirchen, Germany           URL:     www.cadsoft.de

_______________________________________________________________

On 10/4/2010 1:37 AM, Klaus Schmidinger wrote:

On 10/01/10 16:06, Christopher Cole wrote:

>> ...

>> 2) DXF support.  The dxf.ulp to generate DXFs is very poor.

 

What exactly is "poor" about it?

 

Klaus Schmidinger

I would love to see a dxf to Eagle ULP.  Have I missed it

somewhere ?

It is not easy converting BMP files and having to

calculate the proper size and then not be able

to re-size the picture once it is in Eagle  (PCB, mainly)

boB

Klaus Schmidinger <Klaus.Schmidinger@cadsoft.de> wrote:

On 10/01/10 16:06, Christopher Cole wrote:

>> ...

>> 2) DXF support.  The dxf.ulp to generate DXFs is very poor.

 

What exactly is "poor" about it?

 

Klaus Schmidinger

Please see the attached example, with accompanying DXF which was created

using the dxf.ulp.  I am using v5.10.  Using various DXF viewers, the holes

are rendered in erroneous positions.

I have also had problems with arcs being drawn the wrong direction.  It

almost looks like all arcs are assumed to be drawn in the CW direction. 

In the past, I have exported DXFs from Eagle that contained 90 degree arcs

at each of the four corners of a PCB.  When importing the DXF into other

CAD software, some of the 90 degree arcs turn into 270 degree arcs.

Thanks,

-Chris

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end

--

boB Gudgel <bob@midnitesolar.com> wrote:

On 10/4/2010 1:37 AM, Klaus Schmidinger wrote:

>> On 10/01/10 16:06, Christopher Cole wrote:

>>> ...

>>> 2) DXF support.  The dxf.ulp to generate DXFs is very poor.

>>

>> What exactly is "poor" about it?

>>

>> Klaus Schmidinger

 

I would love to see a dxf to Eagle ULP.  Have I missed it

somewhere ?

 

It is not easy converting BMP files and having to

calculate the proper size and then not be able

to re-size the picture once it is in Eagle  (PCB, mainly)

 

boB

Look for dxf2scr in the miscellaneous files section at Cadsoft.  It works

well for some DXFs.  Rounding errors from imperial-to-metric conversions

cause some problems where some line segments don't quite match up properly.

For this reason, I typically import a DXF into a reference layer, and then

I re-draw the artwork into another layer. 

It is a really painful process that takes several iterations to get right

(scaling, unit conversions, etc).  It would be really nice if Eagle could

import and export DXFs natively.

-Chris

--

Hello Chris,

I examined your example.

I used the viewer 'dxfviewer' on Linux to check the dxf file and attached it as screenshot.

I don't see what's wrong here.

Did you use the original ULP version from 5.10 ? I cannot reproduce it exactly.

I your file there's a white border around it in my case not.

But that's not relevant anyway.

2nd problem (concerning arcs):

I drawed a wire with 90° arcs, exported it and looked at the output with dxfviewer.

I don't see any errors. Probably this gets imported wrong into the other CAD system.

If you can you tell more specific what's wrong it would be helpful.

I'm not saying that the ULP is completely error free

Regards,

Walter Spermann

On 11/03/10 00:42, Christopher Cole wrote:

Klaus Schmidinger <Klaus.Schmidinger@cadsoft.de> wrote:

>> On 10/01/10 16:06, Christopher Cole wrote:

>>> ...

>>> 2) DXF support.  The dxf.ulp to generate DXFs is very poor.

>>

>> What exactly is "poor" about it?

>>

>> Klaus Schmidinger

 

Please see the attached example, with accompanying DXF which was created

using the dxf.ulp.  I am using v5.10.  Using various DXF viewers, the holes

are rendered in erroneous positions.

 

I have also had problems with arcs being drawn the wrong direction.  It

almost looks like all arcs are assumed to be drawn in the CW direction. 

In the past, I have exported DXFs from Eagle that contained 90 degree arcs

at each of the four corners of a PCB.  When importing the DXF into other

CAD software, some of the 90 degree arcs turn into 270 degree arcs.

 

Thanks,

-Chris

 

 

 

--

_______________________________________________________________

Walter Spermann                         Phone: +49-8635-6989-10

CadSoft Computer GmbH                   Fax:   +49-8635-6989-40

Pleidolfweg 15                          Email:   wsp@cadsoft.de

D-84568 Pleiskirchen, Germany           URL:     www.cadsoft.de

_______________________________________________________________

Putting in my 5 cents... I agree with Chris that a certain level of compatibility with mechanical CAD packages is a must. I have been using Eagle for 15 years and I must say it's a wonderful piece of software but that's one of the features I really miss.

When I have to import a board or package outline in most cases I just end up drawing everything once again manually in Eagle, which is a time consuming task, especially with more complicated outlines. Any other method I have tried when importing dxf to Eagle, from different ULPs to even some executables that can be found, has left me utterly frustrated. It either does not work, or requires that much of repairing (of soure dxf or imported results) it doesn't make much sense. I really think such an important feature should be an integral part of Eagle. I would like to be able to do something like File-->Import DXF / Select Layer / OK - at least in board and library (package) editor.