Thursday, 31 January 2008
If you know the angle of spread you want the grid to have and you know the width of the aperture, you can work out the length you need to make the grid, with the following equation.
Length = Aperture/Tan(Angle/2)
Or you may find these useful
Aperture = Length * Tan(Angle/2)
Angle = 2 * Atan(Aperture/Length)
To make life a little easier for you, I have put together a little calculator, that allows you to change any of the variables and will recalculate for you on the fly.
The checkboxes link variables, so that if you change a value in a box, then the one it is linked to, will be re-calculated. Hopefully it will help you avoid making grids that are too long or too short.
I haven't tested this thoroughly so if you find any bugs or have any suggestions please leave a comment. I'd also like to hear from you if it helped you build your grid