euler-angles

I am using two image of the single object the object is roated certain degree from its first image. I have calculated the POSE of each image and converted the rotational vector to Matrix using Rodergues(). Now how do I calculate and see how much it is rotated from its first position? I have tried many ways but answers was no were close EDIT: My camera is fixed only the object is moving. Krish We can get Euler angles from rotation matrix using following formula. Given a 3×3 rotation matrix The 3 Euler angles are Here atan2 is the same arc tangent function, with quadrant checking, you typically

I need to calculate the 2 angles (yaw and pitch) for a 3D object to face an arbitrary 3D point. These rotations are known as "Euler" rotations simply because after the first rotation, (lets say Z, based on the picture below) the Y axis also rotates with the object. This is the code I'm using but its not working fully. When on the ground plane (Y = 0) the object correctly rotates to face the point, but as soon as I move the point upwards in Y, the rotations don't look correct. // x, y, z represent a fractional value between -[1] and [1] // a "unit vector" of the point I need to rotate towards

I'm looking for a way to convert direction vector (X,Y,Z) into Euler angles (heading, pitch, bank). I know that direction vector by itself is not enough to get the bank angle, so there's also another so-called Up vector. Having direction vector (X,Y,Z) and up vector (X,Y,Z) how do I convert that into Euler angles? Let's see if I understand correctly. This is about the orientation of a rigid body in three dimensional space, like an air plane during flight. The nose of that airplane points towards the direction vector D=(XD,YD,ZD) . Towards the roof is the up vector U=(XU,YU,ZU) . Then heading H

First of all, I am not a mathematical expert at all. Please be tolerant to my mathematical mistakes and correct me where necessary, I'd love to learn. I have a cube which is rotating using css animations with transform: matrix3d(4x4). I can also manually rotate the cube, converting user actions to the same matrix3d transformations. What I want is a rotating cube with css when the user stops interacting that starts from where the user left it. This is something I am successfully doing by getting the cube's transform matrix3d value and using multiplication to set the css's keyframes dynamically.