Meet a problem, but can't find solutions on internet. I know here are smartest people, so hope can get some help.↵
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The problem is, starting from 0 degree, we rotate `theta` every time, theta is a floating point, like 33.7 degree. So now we have an array of angle `[0, theta, 2*theta, ...]` (wrap to [0..2*PI]).↵
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And we are given an start index `a` and end index `b`, how can we quickly find all indices in `[a..b]` whose angle fall into angel range `[t1..t2]` (the blue area)?↵
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Really thanks for any idea, I can only think out iterating all indices one by one.↵
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The problem is, starting from 0 degree, we rotate `theta` every time, theta is a floating point, like 33.7 degree. So now we have an array of angle `[0, theta, 2*theta, ...]` (wrap to [0..2*PI]).↵
↵
And we are given an start index `a` and end index `b`, how can we quickly find all indices in `[a..b]` whose angle fall into angel range `[t1..t2]` (the blue area)?↵
↵
Really thanks for any idea, I can only think out iterating all indices one by one.↵
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