View Single Post
  #6 (permalink)  
Old November 24th, 2007, 03:38 PM
phil000's Avatar
phil000 phil000 is offline
CB Supporter 

Techie
 
Join Date: Nov 2007
Location: Cincy and Kent, opposites of ohio
Posts: 97
Thanks: 2
Thanked 1 Time in 1 Post
Send a message via AIM to phil000
Default Re: Algebra and Trigonometry for Lighting Designers

Quote:
Originally Posted by gafftaper View Post
Nice Spreadsheet Phil and welcome to the booth.
This is the modification I would like to see in a photometric spreadsheet. I want to be able to manually enter:
Instrument Height, Height above deck of target (for example 6' for head height), Horizontal distance to target, and the downward angle of the instrument. Both your sheet and Derek's automatically calculate Throw distance and beam angle. But I want to accurately know what's going on 6' above the deck. Simply changing the height in your sheets, changes the angle and results inaccurate information. So it would be great if all four of those factors were independent.
I can make them independent, should have it done by the end of the day...

the only problem is that the angle function in Excel in on some serious crack. It can prove consistency, but if you try and create a 30 60 90 triangle, it'll say like 54 degrees for the 60 degree angle...
Just for you buddy :
http://www.divshare.com/download/2880495-a92
Phil

Last edited by phil000; November 25th, 2007 at 03:02 AM..
Reply With Quote