Any chance that a DC analemmatic macro could be modified to accept different plate inclinations and/or declinations? The DC macros are the only easy-to-use programs that I know of the draw analemmatics. I'm afraid that I am not at all good with spreadsheets. This would be a very useful modification since analemmatics are popular on sidewalks and all architechs design sidwalks with slopes.
But if I understand Fer's letter, if the slope is small, then the error would be small too. Maybe I should just imput the "false" latitude and not worry about the small error caused by a vertical gnomon that is not perpendicular to the sloping face. John John L. Carmichael Jr. Sundial Sculptures 925 E. Foothills Dr. Tucson Arizona 85718 USA Tel: 520-696-1709 Email: [EMAIL PROTECTED] Website: <http://www.sundialsculptures.com> ----- Original Message ----- From: "John Carmichael" <[EMAIL PROTECTED]> To: "Sundial List" <sundial@rrz.uni-koeln.de> Cc: "Frans W. MAES" <[EMAIL PROTECTED]> Sent: Monday, April 15, 2002 9:15 AM Subject: Sloping Analemmatics > Hi All: > > I have a question. > > I use the Delta Cad macros to design analemmatics. These macros only permit > the design of analemmatics that have flat horizontal faces. But I need to > design an analemmatic that is painted on cement that slopes slightly to the > south. Let's say the angle of slope is 3 degrees from horizontal and the > latitude of the sundial is at 32.5 N.degrees. > > I thinking that if imput into the DC macro a false latitude of 32.5* - 3* = > 31.5 degrees that it would produce the correct drawing for the sloping > sundial. > > Is my thinking correct on this? > > Thanks anyone > > John > > John L. Carmichael Jr. > Sundial Sculptures > 925 E. Foothills Dr. > Tucson Arizona 85718 > USA > > Tel: 520-696-1709 > Email: [EMAIL PROTECTED] > Website: <http://www.sundialsculptures.com> > > > - > -
