I am struggling with this in JavaScript, but this problem applies to many other languages/environments as well. I want to have one object rotating towards the position of another object, and I use...

atan2(y, x) has that discontinuity at 180° where it switches to -180°..0° going clockwise. How do I map the range of values to 0°..360°? here is my code: CGSize deltaPoint = CGSizeMake(endPoint.x -...

I need to calculate the angle between lines. I need to calculate atan. So I am using such code static inline CGFloat angleBetweenLinesInRadians2(CGPoint line1Start, CGPoint line1End) { CGFloat d...

I have U and V wind component data and I would like to calculate wind direction from these values in R. I would like to end up with wind direction data on a scale of 0-360 degrees, with 0° or 360° ...

I am working on a spatial analysis problem and part of this workflow is to calculate the angle between connected line segments. Each line segment is composed of only two points, and each point has...

I'm seeing differences between Firefox and Safari in the last digit of the output from Math#atan2. My code: Math.atan2(-0.49999999999999994, 0.8660254037844387) Safari (12.1.1) gives -0.5235987...

I have come across a function which computes atan(x) (the source is here). Reducing it to the core of my question and slightly reformatting it, they have something like that: static const double o...

Math has defeated me once again. This is such a simple task, but I can't manage to get it done. Scenario: I draw on a SurfaceView a round image. The user touches a point on image border and starts...

In GLSL (specifically 3.00 that I'm using), there are two versions of atan(): atan(y_over_x) can only return angles between -PI/2, PI/2, while atan(y/x) can take all 4 quadrants into account so th...

Lets say I'm using atan2 to get the angle between two vectors. atan2 gives a value in radians. I convert it to degrees using a built in function in Java. This gives me a value between 0 and 180 de...

I'm currently trying to convert given Cartesian coordinates (x,y,z) to spherical coordinates (r, theta, phi) using the ParaView Calculator-Filter, where theta is the polar angle and phi the azimuth...

Normally, polar coordinates go from 0 to π to 2π (just before 2π really, as it equals 0 again). However, when using the JavaScript atan2() function, I'm getting a different, weird range: ...

OK firstly apologies as I know this kind of question has been asked before more than once. However even after looking at the other questions and answers I have been unable to get this to work for m...

I need to execute the ATAN2 function in MS SQL Server. How do I do this? T-SQL appears to have all the usual math functions like cos, sin, radians etc, just not ATAN2. What is the function for thi...

I am trying to transform an image (represented as a matrix) in R, into polar coordinate space with the origin being 0,0 (top left corner). Given the 215x215 matrix x which looks like: x0 = as.v...

I am calculating angles from a 3-axis accelerometer, but my compiler doesn't have a atan or atan2 function. It has a reserved memory slot, but it calls a function i can't find in any files. My com...