Hi Warren:
Remember the NASS meeting in Hartford? That was the first meeting I went to
and I met you. You were the person who turned me on to Delta Cad. Could you
send me your article or pin down the issue it appeared in?
Fred's schedule is jammed packed so I doubt that we can invite a software
representative to talk. But I will try to do a good job. I don't know
anything about scripting, whatever that is! (Does it have something to do
with making macros?). My talk will be oriented to the people who just want
to design sundials. I'll talk about using the popular sundial generator
programs such as Shadows and Zonwvlak in conjunction with Delta Cad. And
I'll talk about using existing available sundial macros, but not on how to
make a macro. (I can't do that either). Mac Oglesby and Fer are the only
guys on The List that I know who have made any sundial Delta Cad macros.
Then finally, if I have time, I'll talk about bringing a DC drawing into
Photoshop if you want to do special things to your drawing such as adding
color or more artwork or transforming the drawing in other ways.
We'll miss seeing you!
John
----- Original Message -----
From: "Warren Thom" <[EMAIL PROTECTED]>
To: "John Carmichael" <[EMAIL PROTECTED]>; "Roger Bailey"
<[EMAIL PROTECTED]>
Cc: "Sundial List" <[email protected]>
Sent: Thursday, July 20, 2006 12:45 PM
Subject: Re: Google Wall Declination
Hi John, Roger and all,
I am sorry that I will miss the 2006 meeting - first one I will miss since
2001. Glad to hear you are putting on a DeltaCad workshop. I was unaware
about version 6, until you posted your message, John. In checking it
out, they are located near the meeting. I would urge someone to contact
them and invite them to the NASS conference. Midnight Software, Inc.,
P.O. Box 77352 ,Seattle, WA 98177-0352 , USA They could do a talk on the
scripting that is available in DeltaCad. Ron Anthony was in contact with
them ages ago about the scripting language. For your workshop, you might
photocopy the article I wrote about 10 years ago for the Compendium. I do
think DeltaCad is easy to use --- and I spent hours at my school trying to
learn AutoCad -- and never got very far. I printed something from
DeltaCad after my first 15 minutes. (I have no $$$$ interest in
DeltaCad.)
Take Care,
Warren Thom
----- Original Message -----
From: "John Carmichael"
To: "Roger Bailey"
Hi Roger:
you asked:
I assume that your Delta Cad workshop will cover the transfer of Zon dxf
files to Delta Cad.
Yes, of course! That will be an important little part of my Delta Cad
talk: How to import dxf, dwg and jpgs into a DC drawing.
By the way, the new Delta Cad version 6.0 lets you import jpegs now. The
older version would only let you import bmps. (which are huge files).
This makes adding artwork/photos much easier and the files are smaller.
You should upgrade to 6.0 if you haven't already done it. It has other
useful features that 5.0 did not have.
You might try importing a standard jpeg photo of your building wall in
DC. Then copy and paste a the DC drawing of your sundial on top of it.
You will see the DC sundial drawing on top of the photo.
----- Original Message -----
From: "Roger Bailey" <[EMAIL PROTECTED]>
To: "John Carmichael" <[EMAIL PROTECTED]>
Sent: Thursday, July 20, 2006 9:17 AM
Subject: RE: Google Wall Declination
Hi John,
I assume that your Delta Cad workshop will cover the transfer of Zon dxf
files to Delta Cad. The ability in Delta Cad to "select all" and "copy"
to
get the lines only as an overlay was a new one on me. Every other way I
tried gave me an opaque white background, useless as an overlay. This
works
for PowerPoint, not for Photoshop or Word. There you get the white
background.
See you soon,
Roger
-----Original Message-----
From: John Carmichael [mailto:[EMAIL PROTECTED]
Sent: July 20, 2006 7:07 AM
To: Roger Bailey
Subject: Re: Google Wall Declination
Very Cool Roger!
----- Original Message -----
From: "Roger Bailey" <[EMAIL PROTECTED]>
To: "Sundial Mail List" <[email protected]>
Sent: Wednesday, July 19, 2006 11:29 AM
Subject: Google Wall Declination
We have had many discussions on this list on how to determine the
declination of a vertical wall. Let me suggest a new technique for not
only
wall declination but also location (latitude and longitude). Use the
satellite images on "Google Earth". An example is posted in three
PowerPoint
slides at:
http://www3.telus.net/public/rtbailey/WalkingShadow/WallDecG.ppt
For my "Timelines" presentation, I was interested in analysing sundials
on
mosques in Istanbul. When I took pictures of the three sundials on the
New
Mosque "Yeni Camii", I did not take field measurements to determine the
wall
declination. No problem. Start up Google Earth and fly to Istanbul.
Without
rotating, just using the X/Y controls, zero in on the New Mosque and
save
the image. You can insert the saved image into a PowerPoint
presentation,
add the North South vertical axis, draw a line along the wall and
determine
the wall declination, perpendicular to the wall.
Then start up Zon 2000 and enter the latitude and wall declination from
the
Google image into Fer de Vries program. Calculate for the example
sundial:
local hours, Italian hours and Islamic Prayer times. Clip the Zon
drawing,
save it as a dxf file and load the dxf file into Delta Cad. There you
can
trim the lines to recreate the dial on the wall. Select all and copy
the
lines as an overlay on the photograph (corrected for perspective) in
your
presentation.
The Google Earth technique is sufficiently accurate with large
buildings
and
high resolution images. I have used it successfully for three mosques
in
Istanbul and the Klementinum in Prague. It even works for my home! The
full
story will be shown in Vancouver.
A conclusion from this analysis is the sundials on the mosques in
Istanbul
show the mid afternoon prayer time "Asr" as in the standard horizontal
shadow length definition. But a different convention was used in
Istanbul
for "Zuhr", the prayer just after noon. The Zuhr lines are not based on
the
altitude giving the horizontal shadow length as the noon shadow length
+
25%
of the vertical gnomon height.
Regards,
Roger Bailey
Walking Shadow Designs
N 48:38:22.90, W 123:24:10.80, declining east 90 degrees by Google
Earth
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