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October 12th, 2014, 01:48 AM  #1 
Newbie Joined: Oct 2014 From: Seoul Posts: 1 Thanks: 0  Finding approximate area of square traced by beam of light
I want to find area of a square which is traced by the beam of a light. Let's say angle between the beam of light is \theta. Now the beam will be in shape of triangle on the square. We can easily find the area of the area covered by beam from the square by finding out the intersection points. But that is very costly. I want some approximate method to find the area to make it less computationally expensive. 
October 15th, 2014, 02:51 PM  #2 
Global Moderator Joined: Dec 2006 Posts: 20,942 Thanks: 2210 
That's hard to understand. How many parameters will determine an exact answer? 

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approximate, area, beam, finding, light, square, traced 
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