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2d Coordinate rotation in clockwise direction

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Reuben Addison
Reuben Addison 2019-1-18
评论： Reuben Addison 2019-1-18
How do I rotate a 2d coordinate about the origin in a clockwise direction, I have data points for the origin as [start_x = 24.000;
,start_y = 16.000] and target lorcation [target_x = 27.000,target_y = 16.000], but I want to rotate my target at an angle of 45 degrees clockwise about the origin and I am wondering if there is a way to get a function for the new target coodinates.

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KSSV
KSSV 2019-1-18
th = pi/4 ;
R = [cos(th) -sin(th) ;sin(th) cos(th)] ;
Multiply your points with the above R. Read about rotation matrix: https://en.wikipedia.org/wiki/Rotation_matrix

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Reuben Addison
Reuben Addison 2019-1-18
I think this function rotates counter clockwise , any idea how I could make it clockwise

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