Can't find length of arch o.0 - GameCreators Forum

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Posted: 30th Jan 2006 21:16 Edited at: 30th Jan 2006 21:22

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I need to build a model bridge using 0.3mm sticks, and I have an arch on it.

I can't figure out how to calculate the length of the stick needed to make this arch when I bend it. It is 7.5mm tall (including stick width) and 25mm wide (again, including stick width.

The left end starts at 126º clockwize from 9 O'clock.
The right end starts at 126º counter-clockwize from 3 O'clock.

Thnx for any help

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SirFire

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Posted: 30th Jan 2006 21:22

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You want us to do your math homework?

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Posted: 30th Jan 2006 21:32 Edited at: 30th Jan 2006 21:35

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It's not math homework

it's a bridge. I designed it, but I can't build it cuz I can't figure out how to get the length of the arch. I know there's probably a simple trigonometrical function/algorithm for this, I just don't know what O.o

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Pincho Paxton

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Posted: 30th Jan 2006 21:37 Edited at: 30th Jan 2006 21:38

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Well...

The dectrahendron of the arch is calculated by sin/pi coagulate of the pi juxter. So with a 25mm wide archway curved to 7.5mm at rightangles you have a curve base triangulate at 6.40mm. add that to 25, and you have your length....