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seen Jun 23 at 20:15

Mar
25
awarded  Popular Question
Aug
23
awarded  Scholar
Aug
23
accepted How do I find clockwise angle of a point from the negative x-axis?
Aug
23
awarded  Editor
Aug
23
revised How do I find clockwise angle of a point from the negative x-axis?
improved explanation of question
Aug
23
awarded  Commentator
Aug
23
comment How do I find clockwise angle of a point from the negative x-axis?
I'll up vote you as soon as I gain enough rep as well, because this is what I'd be looking for if I wasn't writing a program.
Aug
23
comment How do I find clockwise angle of a point from the negative x-axis?
Drat, not enough rep to mark ya up, but as soon as I get enough rep, I'll make sure to indicate this is what I was looking for.
Aug
23
comment How do I find clockwise angle of a point from the negative x-axis?
Ahhh, gotcha. Thank you.
Aug
23
comment How do I find clockwise angle of a point from the negative x-axis?
I'm not sure how to make what I was looking for any more clear. Rahul Narain answered my question just like I asked it in the comments. I learned that I need to be more thorough when explaining my problem, but this is my very first post here, so I'll attempt to do that in the future.
Aug
23
comment How do I find clockwise angle of a point from the negative x-axis?
let us continue this discussion in chat
Aug
23
comment How do I find clockwise angle of a point from the negative x-axis?
How can I mark your comment as the correct solution? My point wasn't really at the origin, which was my bad for not explaining. I was taking the absolute value of change to the origin, which was what was throwing me off. You're persistence was what helped me realize I was mistaking. Thank you. Please let me know if there is a way I can increase your reputation?
Aug
23
comment How do I find clockwise angle of a point from the negative x-axis?
Hold on, you might be right. Let me test it more first.
Aug
23
comment How do I find clockwise angle of a point from the negative x-axis?
Sorry, I believe what you said works for the third quadrant, but not any of the other ones. It only works for one quadrant.
Aug
23
comment How do I find clockwise angle of a point from the negative x-axis?
No, that gives me the angle from the x-axis, but not the clockwise angle from the negative x-axis. For example, if my second point is in in the third quadrant I get an angle between 0 and PI/2, but what I want is a much larger angle, or more specifically the angle from the negative x-axis to the third quadrant.
Aug
23
awarded  Student
Aug
23
comment How do I find clockwise angle of a point from the negative x-axis?
@RahulNarain I tried both atan2 and atan, but I'm running into the same problem.
Aug
23
comment How do I find clockwise angle of a point from the negative x-axis?
More or less. Maybe I wasn't clear enough. I'm given a point p1, and a point p2. Point p1 will always be at the origin, and p2 can be anywhere. What I need to find out is the clockwise angle from the negative x-axis, and p2. I'm not sure how a rotation matrix would help me solve this since it's the theta of the rotation I need to figure out.
Aug
23
asked How do I find clockwise angle of a point from the negative x-axis?