Hatching Transparency
http://forums.autodesk.com/t5/AutoCAD-Civil-3D-Wishes/Hatching-Transparency/td-p/1967238
I would like the ability to control the transparency of solid hatching. It would be beneficial for highlighting boundaries and areas instead of using dense lines or dots that look grainy or choppy when plotted. There are times when such as using multiple hatches of the same area or with external references where it would be nice to shade over top but see the other entities beneath.
markpt
03:21 PM
That would be nice.

Especially for parcel fills.
choneyman
04:02 PM
This request is probably an AutoCAD issue, however, I have good results
using solid hatching and kicking the screening quite low and sending it to
the back. A little trial and error for your particular printer should work.

Bill

wrote in message news:5584008@discussion.autodesk.com...
I would like the ability to control the transparency of solid hatching. It
would be beneficial for highlighting boundaries and areas instead of using
dense lines or dots that look grainy or choppy when plotted. There are times
when such as using multiple hatches of the same area or with external
references where it would be nice to shade over top but see the other
entities beneath.
*wfb
06:31 AM
Yes, I agree its a AutoCAD thing, but there is no AutoCAD wish forum.

As far as the screening, does that work with printing to DWF's and PDF's?
choneyman
09:41 AM
I can't vouch for the DWFs, but my PDFs work great. Color 253, and in the
20% screening area.

Bill

wrote in message news:5585256@discussion.autodesk.com...
Yes, I agree its a AutoCAD thing, but there is no AutoCAD wish forum.

As far as the screening, does that work with printing to DWF's and PDF's?
*wfb
09:56 AM
Screening does not work for mimicking transparent hatch.

If the hatch is in front of objects, it does not show the object underneath, which is why we want transparent hatch.

For example, hatching over an air photo. You want to shade an area with a hatch, but still show the air photo underneath.

So screening is not an acceptable work-around.

We need transparent hatches.
choneyman
10:41 AM
OK, I see your point.

Bill

wrote in message news:5585351@discussion.autodesk.com...
Screening does not work for mimicking transparent hatch.

If the hatch is in front of objects, it does not show the object underneath,
which is why we want transparent hatch.

For example, hatching over an air photo. You want to shade an area with a
hatch, but still show the air photo underneath.

So screening is not an acceptable work-around.

We need transparent hatches.
*wfb
11:35 AM
We just use a small-tight dot hatch for hatching over aerials.
dvikse
12:54 PM
honeyman wrote:
> Screening does not work for mimicking transparent hatch.
>
> If the hatch is in front of objects, it does not show the object
> underneath, which is why we want transparent hatch.
>
> For example, hatching over an air photo. You want to shade an area
> with a hatch, but still show the air photo underneath.
>
> So screening is not an acceptable work-around.
>
> We need transparent hatches.


I agree that we need transparent hatches - however.

I worked on a personal project once - I had a TIFF image that
represented a county, and I drew in district areas and hatched them with
a solid hatch. I had the hatch sent to the front, and the image sent
to the back. I applied a screening factor to my colors and printed
them (in color) on a HP1055CM plotter. The drawing looked like tripe,
as did the plot preview. However, when the finished product came out,
it was exactly what I wanted - a transparent hatch over a TIFF image.

So I disagree - it was an acceptable workaround.

--
Jason Hickey

Civil 3D 2008
Dell Precision M70
2 GIG RAM, 256 MB nVidia Quadro FX Go1400
Intel Centrino 2 gHz Processor

www.civil3d.com
*Jason Hickey
03:09 PM
That only works with plotting to printers (using the merge option for the printer).

It does not work for DWF's or PDF's (unless there is an option to enable line merge in those pc3's. Acroplot can do this I believe.)
choneyman
03:14 PM
I think the newer DWFs do have a working, merge control. I think I tested
it, but can't promise.

I have not used the Adesk PDF device at all.

wrote in message news:5585764@discussion.autodesk.com...
That only works with plotting to printers (using the merge option for the
printer).

It does not work for DWF's or PDF's (unless there is an option to enable
line merge in those pc3's. Acroplot can do this I believe.)
*TomD
08:05 PM
Your right. You can enable line merge with DWF's.

Still don't seem to be able to with the DWG to PDF.pc3.
choneyman
08:25 AM
Why are 'workarounds' acceptable? If Autodesk would create a transparent hatch, we could save a lot of time and headaches.

Saying the workaround is acceptable, is like saying not having a spacebar in MS Word is acceptable. Sure_you_can_use_an_underscore_instead,_but_it's_a_real_nuisance.
mpeterson79
07:33 AM
Touche! Right to the crux of the problems. I have been on these groups for
several years now where there are MANY workarounds for many issues; some of
which get addressed by AD in either a SP or the next release, some that get
addressed which cause new problems so yet another workaround is introduced.
It is my understanding (or perhaps not) that workarounds are SUPPOSED to be
temporary fixes, but there are still some of these workarounds that have
been in existence for several releases which AD has not addressed. I watch
with amusement some of the new 'bells and whistles' introduced with each new
release, but yet there are some issues at the root of the product that have
been around forever that kind of sour the ooohs and ahhhs. My first
impressions that will get ME the ooohs and ahhhs is the fixes to basic
problems. Specifically, the comma seperator. We've HAD the functionality in
LDT, and yet it magically disappears when the 'new and improved' version is
introduced. And it is those kind of things that only a person perusing the
DG would figure out. No manuals, no helpfile, no tutorials address that
issue. Only the trainers that are on this DG would know how to fix that.

But I digress..


Rick
wrote in message news:5589114@discussion.autodesk.com...
Why are 'workarounds' acceptable? If Autodesk would create a transparent
hatch, we could save a lot of time and headaches.

Saying the workaround is acceptable, is like saying not having a spacebar in
MS Word is acceptable.
Sure_you_can_use_an_underscore_instead,_but_it's_a_real_nuisance.
c3d_rickgraham
04:54 AM
Also, I don't want to use Lines Merge. I want to have one solid hatch
bright yellow over my aerial photo that completely masks out the photo, but
another grey hatch that is transparent so I can see the photo underneath.
An impossible situation without transparent hatch.

Matt
*Matt Kolberg
11:32 PM
Did you try a 'dots' hatch - that's what I do... less than desirable results, but it works. Use a really light lineweight and a fairly tight spacing.
dvikse
07:06 AM
That is what we have been using, but it causes problems when your ploting at different scales.

Now with annotative hatch, it will be better, but I still would like to see transparent hatch.
choneyman
07:53 AM
I believe this is why Map 3D is included in the product.

You are able to export the parcel areas as SDF files. Connect to them using the Data Connect window and style them with actual transparency (excellent feature I must say).

They lay over/under your aerials, tops, C3D objects, etc. VERY nicely. No need to change plot settings either or worry about what dot pattern works best. That was a sure-fire reason for me to switch to that mode of thinking. Also, it doesn't balloon the drawing size at all. :smileyhappy:

This is where "thinking outside the box" comes in.....my 2c.

-Bryant
bquinney1
09:36 AM
I've been looking for someone like you!!!

I've not been able to get transparencies to print, either 2007 or 2008, DWF,
PDF, HP500, Konica small format.........and a few other tries. Regarldless
of mergeing or any other setting I can find.................no printing of
transparency. Several web searches revealed that it's uncommon for these to
print, with noone (that I've found) being able to tell how/why.

You are printing these on a regular basis, with no problems?

wrote in message news:5606270@discussion.autodesk.com...

You are able to export the parcel areas as SDF files. Connect to them using
the Data Connect window and style them with actual transparency (excellent
feature I must say).
*TomD
11:42 AM
This is what this thread is all about. I don't want to do a dumb
workaround. I do it because there is no other choice.

Matt
*Matt Kolberg
07:52 PM
It's a good "workaround" as well, but we don't want only transparent hatch,
we want a transparency property for all, or most objects. That would be
ideal.

The Map tool is fone for those who have a clue, but for green drafters or
those who can't learn new tricks it won't work if they have to edit it.

Matt
*Matt Kolberg
07:52 PM
That's right. Regular basis, no problems at all.

What I did when I first came across this was create some of these objects on top of images and plotted varying combinations of color/transparency values to get the ideal setting.
bquinney1
10:27 AM
Actually, it's not a "workaround", but rather a procedure or technique., just like typing 'L' instead of 'LINE' is not considered a workaround. Both hatching and FDO layers give you results, but one has benefits that far outweighs the other

If it takes showing green drafters how to do it, then the time taken is an investment. For those that can't learn new tricks, I've never quite figured out what to say about them. There are quite a few people learning new tricks every day that won't have to worry about keeping a job though....

Disclaimer: I'm not trying to be a smart-(you know), just speaking my own view here. I enjoy seeing people learn new techniques.
bquinney1
10:39 AM
bquinney wrote:
> That's right. Regular basis, no problems at all.
>
> What I did when I first came across this was create some of these
> objects on top of images and plotted varying combinations of
> color/transparency values to get the ideal setting.

Wow, Bryant - right in front of our face and not something we normally
think of. Took a mapping guy like you to show us the error of our ways.

Way to go!

--
Jason Hickey

Civil 3D 2008
Dell Precision M70
2 GIG RAM, 256 MB nVidia Quadro FX Go1400
Intel Centrino 2 gHz Processor

www.civil3d.com
*Jason Hickey
10:48 AM
It's a workaround if you have the export the data to make it work.

Map should read C3D objects natively.

But that's another rant...

--
James Wedding, P.E.
Engineered Efficiency, Inc.
Civil 3D 2007
XP Tablet, SP2, 2GHz, 2G
www.eng-eff.com
www.civil3d.com
jwedding
12:51 PM
On that part, agreed as stated. :smileyhappy:
bquinney1
01:02 PM
james.wedding wrote:
> It's a workaround if you have the export the data to make it work.
>
> Map should read C3D objects natively.
>
> But that's another rant...
>

It's the one topic I can actually get Murph excited about :smileywink:

For whatever it's worth, Map users are used to importing everything, so
it's really not a workaround for them.

--
Jason Hickey

Civil 3D 2008
Dell Precision M70
2 GIG RAM, 256 MB nVidia Quadro FX Go1400
Intel Centrino 2 gHz Processor

www.civil3d.com
*Jason Hickey
08:13 PM
Using Map to achieve our result was right on the money for two reasons...

The Style options of the objects allow for more options, and the objects can be grouped in folders and turned on and off easily through the Map interface - MAPWSPACE

Our "hatched" areas were originally from GIS data - yep its funny how you incorporate a new software but maintain your old "ACAD" workflows (mainly our lack of MAP experience too) - so we went back to the GIS data files, added SDF connections and wha-la... all the objects came into the drawing. Now we will erase the ACAD boundaries and hatches we created originally. :smileyhappy:

Thanks for the posts.

Chad
ChadBalser
08:24 AM
Are you having any issues plotting with MPPLOTTRANSPARENCY turned on? That
seems to take our workflow to it's knees.

wrote in message news:6287899@discussion.autodesk.com...
Using Map to achieve our result was right on the money for two reasons...

The Style options of the objects allow for more options, and the
objects can be grouped in folders and turned on and off easily through the
Map interface - MAPWSPACE

Our "hatched" areas were originally from GIS data - yep its funny how
you incorporate a new software but maintain your old "ACAD" workflows
(mainly our lack of MAP experience too) - so we went back to the GIS data
files, added SDF connections and wha-la... all the objects came into the
drawing. Now we will erase the ACAD boundaries and hatches we created
originally. :smileyhappy:

Thanks for the posts.

Chad
*Dave Drahn
02:31 PM
After reading this forum, I tried another method using the "mapwspace" Display Manager. If you have a solid hatch that you want to make transparent, you have another option that may be more user friendly than exporting to the SDF format. Export the object as a polygon shapefile. Save it in the project folder.

Then, Add Data...SHP. Navigate to the shapefile and add the polygon shapefile. You can then change the solid color to your liking and apply the transparency using the slider in the same location where you change the color. It's called Foreground Transparency.

Note: I used ArcGIS to change the shapefile from a line to a polygon because many times AutoCAD Map doesn't consider closed polygons as exportable polygons, so you have to export it as a line. If you don't have ArcGIS, you can run the Map...Tools...Drawing Cleanup to fix the polygon so that it will export as a polygon, but it's a little troublesome.

I used shapefiles often, so this is a better solution for me. Anyone get it to work?
dknell
10:23 AM
. maybe I should "read" the thread before I post.

Joe Edited by: Joe-Bouza on Feb 15, 2010 3:36 AM
Joe-Bouza
04:32 PM
I find that using ANSI31 or ANSI37 works very well for transparent hatching over aerial imagery. After hatching set the lineweight to 0.00 mm and then work with the hatch scale until you have decent transparency. The lines will plot VERY thin and close together, but the underlying imagery will show through. -Jonathan W-
jonwaggoner
11:11 AM
I would like the ability to control the transparency of solid hatching. It would be beneficial for highlighting boundaries and areas instead of using dense lines or dots that look grainy or choppy when plotted. There are times when such as using multiple hatches of the same area or with external references where it would be nice to shade over top but see the other entities beneath.
markpt
03:21 PM