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Angular Velocity Calculation

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I think my brain is a little fried at the moment and I'm having a hard time expressing some of the maths around angular velocity and calculating a vector in code. I have roll, pitch, yaw and the magnitude of each, I know how far an item is from the centre of rotation. The basics, the further away I am from the centre, the larger the angular velocity vector. So I think that's fine in terms of calculation. I have the position Vector of the point I want to calculate in relation to the centre of rotation. Am I missing anything else I need to do the calculation? If anyone can give me some pointers on approaching this problem. Not solve, happy to walk through it. I'm guessing at the moment, but I assume I should solve vectors for roll pitch and yaw and combine these to create a an unnormalised vector (as the 3 axis in question have a magnitude also) multiplied by magnitude of the distance from the centre. The vector will be obviously in the plane perpendicular to the offset vector? Thanks in advance for you thoughts.

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