I want to Assess where someone's ankle is relative to their hip. I have an IMU on the thigh and leg/shin (capturing orientation) and know the lengths of these. I want to know the distance down, across and forward between the hip and ankle. Is there code already suited for this application?
I have an IMU on the persons lower back and want the direction of forward/back and side/side to be relative to this IMU i.e the way the persons facing, defines what is forward.
Work out the trigonometry on paper and post a diagram, so forum members can clearly understand the problem.
The C/C++ equation(s) should fit into a line or two of Arduino code, which supports standard tangent, cosine, sine and their inverse functions.
I don't have the knowledge to work out the trigonemetry
float D = L*sin(alpha); // alpha in radians
Twenty-one minutes.
Thirty-two minutes.
tl;dr:
c^2 = a^2 + b^2
Ah .... SOH CAH TOA.
I remember it well from maths lessons in the late 60s.
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