
		SUNDIAL DESIGNER

                After reading this you may find part or all
		of your on screen picture has been erased.
		Simply click view again to restore it. This
		is not a BUG it is clever programming designed
		to save memory.

	1. General Overview
	2. Equation Of Time
	3. Type  A
	4. Type  B
	5. Type  C
	6. Legal Stuff
	7. Warranty
	8. How To Get Your Town On The List

1. General Overview
	This programme Has been written to  help those wishing
     to create a sundial. It will create a BitMaP picture with
     all the right lines at all the right angles for your 
     location of choice. It can show Local Apparent Time or
     Standard Apparent Time - which is the one of most practical 
     value. Local Apparent Time is specific to Latitude,
     consequently any location East or West of any other location
     will have a different Local Apparent Time. This is why we 
     have time zones. Standard Apparent Time gives the time at 
     the local meridian used in your location and will enable
     you to determine the correct Local Mean Time as shown on
     an accurate clock or watch from the sundial. 

 2. Equation Of Time
	Because the planet wobbles and spins on its annual,
    ecliptic trip around the sun the time shown on these
    sundials will vary slightly from the Local Mean Time shown 
    on an accurate clock or watch. To get around this problem 
    a graphic representation of the Equation of time can be 
    displayed on or near the sundial thus enabling the viewer 
    to determine the correct Local Mean Time. To get a BitMaP 
    picture of a graphic representation of the Equation of 
    time select E. O. T. then click the view button to see it 
    on screen and the save button to save it as a BitMaP file.

3. Type  A 
	Type A is the common horizontal sundial you are most  
    likely to be familiar with. In order to work properly the
    dial must be placed flat with the line marked N or
    S pointing to true North or South. The Gnomon or the bit 
    that casts the shadow is placed upright at 90 degrees to 
    the dial with the point marked Top uppermost, the point 
    marked Centre at the point on the dial where the hourlines 
    converge and the point marked N or S pointing to true North
    or true South. Note - although the Gnomon is drawn as a
    triangle it is only the uppermost line that casts the time
    telling shadow, the rest may be cut drilled and decorated
    in any manner you see fit.
	As one gets closer to the equator this type of dial
    has to become larger in order to be of any use and directly 
    on the equator it will not work at all.
	To create the dial ;
    a. Select location you want to make the dial for.
    b. Select colour or black and white.
    c. Select Type A.
    d. Select the lines you want shown on the dial - 
	Standard Hours will enable you to determine the time 
	shown on an accurate clock or watch, Local hours are
	for showing Local Time.
	   The sides for a.m. and p.m. will be shown on the 
	picture, the lines for 6 a.m. and 6 p.m. are longer 
	than the others and extend to the sides of the picture.
	Half hour lines are shorter and quarter hour lines 
	are shorter again.
    e. Click the View button to see a rough approximation of  
       the Dial and Gnomon on screen. If you are not satisfied
       make changes to your selections and click the View button
       again to see the results.
    f. Click the Save button to save higher resolution pictures
       of the Dial and Gnomon to a file - 
	   You will be asked the size of the file you want to
	   save it to. The bigger you make this file the more 
	   accurate your dial will be. Unfortunately the size
	   you can go up to is limited by the amount of memory
	   your computer has. A cryptic windows error message 
	   will be displayed if you try to save a file too big 
	   for your memory.
     g. Other Considerations  -  
	To enable you to tell the same time as shown on an
	accurate clock remember to display a copy of the 
	Equation Of Time (E.O.T) graph on or near your dial.
		In many areas Daylight Savings is used  in
	summertime and all clocks are put forward an hour.
	If your area uses Daylight Savings and your dial is more
	likely to be used during this period then you may want 
	to adjust the hours on it accordingly (Number the 6 a.m.
	line 7 a.m. etc.) or make one dial for Daylight Savings
	periods and one for otherwise.
		If the Gnomon is to be made of a material of any
	significant thickness the dial should be cut in half along 
	the axis where the Gnomon intersects it and each half 
	placed either side of the Gnomon.  

  4. Type  B
	 This is the Analemmatic dial and must also be placed
    horizontal. In the centre of the dial is a Dates Box. Holes 
    are placed in the dial at points along the central, vertical 
    line of the Dates Box for the Gnomon to be placed in. The 
    Gnomon is simply a vertical, straight rod of sufficient length 
    to cast a shadow over the Hour points, as the year progresses 
    the gnomon must be placed in the hole corresponding to the 
    nearest date in order for the correct time to be read from 
    the dial (On screen the Dates box will not show much detail 
    but when the picture is saved the months and where to drill 
    the holes will be clearly marked).
	On the equator the points for the 5 a.m. & 7 a.m. will 
    share the same place as will the points for 5 p.m. & 7 p.m..

	To create the dial ;
    a. Select location you want to make the dial for.
    b. Select colour or black and white.
    c. Select Type B.
    d. Select the points you want shown on the dial - 
	Standard Hours will enable you to determine the time 
	shown on an accurate clock or watch, Local hours are
	for showing Local Time.
	   The sides for a.m. and p.m. will be shown on the 
	picture as will the direction in which to point it -
	true North or South.
	   On the high resolution picture you save the hour
	points will be drawn as crosshairs to enable you to
	draw the hour points acccurately at the same radius
	as that of the Gnomon. The crosshairs for 6 a.m. and
	6 p.m. will be longer than the others.
    e. Click the View button to see a rough approximation of  
       the Dial on screen. If you are not satisfied
       make changes to your selections and click the View button
       again to see the results.
    f. Click the Save button to save a high resolution picture
       of the Dial to a file - 
	   You will be asked the size of the file you want to
	   save it to. The bigger you make this file the more 
	   accurate your dial will be. Unfortunately the size
	   you can go up to is limited by the amount of memory
	   your computer has. A cryptic windows error message 
	   will be displayed if you try to save a file too big 
	   for your memory.
     g. Other Considerations  -  
	To enable you to tell the same time as shown on an
	accurate clock remember to display a copy of the 
	Equation Of Time (E.O.T) graph on or near your dial.
		In many areas Daylight Savings is used  in
	summertime and all clocks are put forward an hour.
	If your area uses Daylight Savings and your dial is more
	likely to be used during this period then you may want 
	to adjust the hours on it accordingly (Number the 6 a.m.
	point 7 a.m. etc.) or make one dial for Daylight Savings
	periods and one for otherwise.
		The holes for the Gnomon Rod to be placed in are
	to be made at the points where the lines from the letters
	denoting months intersect the central, vertical line of 
	the Dates box. For more accuracy you may also want to 
	place holes where the longer lines, separating months 
	intersect the central, vertical line of the Dates Box -
	for the Gnomon Rod to be placed in at times closer to
	the ends and beginnings of the months.

  5. Type C
	 The Type C dial has a rectangular Gnomon that is placed
     upright along the True North - True South line shown on the 
     dial. The dial is only placed flat if it happens to be on 
     the Equator, other wise it is placed at the angle shown by
     a broken line on the Gnomon Picture.
	
	To create the dial ;
    a. Select location you want to make the dial for.
    b. Select colour or black and white.
    c. Select Type C.
    d. Select the lines you want shown on the dial - 
	Standard Hours will enable you to determine the time 
	shown on an accurate clock or watch, Local hours are
	for showing Local Time.
	   The sides for a.m. and p.m. will be shown on the 
	picture and the 12 O'clock Midday lines will be  
	broken. Half hour lines are shorter and quarter hour 
	lines are shorter again.
    e. Click the View button to see a rough approximation of  
       the Dial and Gnomon on screen. If you are not satisfied
       make changes to your selections and click the View button
       again to see the results.
    f. Click the Save button to save higher resolution pictures
       of the Dial and Gnomon to a file - 
	   You will be asked the size of the file you want to
	   save it to. The bigger you make this file the more 
	   accurate your dial will be. Unfortunately the size
	   you can go up to is limited by the amount of memory
	   your computer has. A cryptic windows error message 
	   will be displayed if you try to save a file too big 
	   for your memory.
     g. Other Considerations  -  
	To enable you to tell the same time as shown on an
	accurate clock remember to display a copy of the 
	Equation Of Time (E.O.T) graph on or near your dial.
		In many areas Daylight Savings is used  in
	summertime and all clocks are put forward an hour.
	If your area uses Daylight Savings and your dial is more
	likely to be used during this period then you may want 
	to adjust the hours on it accordingly (Number the 6 a.m.
	point 7 a.m. etc.) or make one dial for Daylight Savings
	periods and one for otherwise.
		REMEMBER - the Dial must be placed on the angle
	indicated by the broken line on the Gnomon picture if it
	is to be of any practical use.


	6. LEGAL STUFF

  	 This programme is Copyright (C) Chris Parry 1999 and
  	 all rights are reserved.
	If I inadvertently used the word "windows", "bitmap" 
	or any others belonging to Microsoft then they are 
	registered trademarks of the Microsoft Corp..


	7. WARRANTY
	
		There Isn't one.


	8. HOW TO GET YOUR TOWN ON THE LIST

		Send  30 AUSTRALIAN DOLLARS or the equivalent 
	of  35  Australian Dollars in your local currency by
	cash, cheque or international money order to;

		Chris Parry
		8/144 Seaview rd.
		Henley South
		S.A.
			Australia
			5022

	Remember to state clearly, Your address and The Town 
	or City that you want added to the list. If you would
	like the updated program emailed to you then include
	your email address otherwise it will be sent on floppy
	disk.