angle

问题 I need help with one tricky thing that I've tried to solve for a couple of days now. It feels like it should be relatively easy and that I am simply missing something somewhere. I have an array defining each wall point (black dots) and I want to create a new inside point (green dots) for each wall point. The distance between each wall point and inside point should be 600. I made a picture to show what I mean: I'm writing this in javascript with aid of WebGL (ThreeJS). 回答1: I'm going to

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 6 years ago . I can find plenty of examples of how to draw a line in vb.net online. I however I cannot find any examples of how to draw lines at a

问题 Similar to my recent question only this time I would like to move the object towards a vector and not another object. Vector3 line = dalekList[i].direction; float rotationDal = (float)(-Math.Atan2(dalekList[i].position.X, -dalekList[i].position.Z) / (2 * Math.PI)); Matrix dalekTransform = Matrix.CreateScale(GameConstants.DalekScalar) * Matrix.CreateRotationY(rotationDal) * Matrix.CreateTranslation(dalekList[i].position); So I would need to put the rotation ( rotationDal ) into the

问题 Given a point in 3D space, what are the three angles (e.g. Euler angles) needed to transform a line to point to that object? Imagine I have a line (or a box) in 3D and I want to transform its heading, pitch, and bank to point to the 3D point from the origin, what values would I use for those angles? I can't figure out the math to calculate the angles to point to a location such as (1,2,3) . 回答1: Note: Instead of "yaw, pitch, roll", I'm going to use the conventions "heading, pitch, bank" as

问题 so I have written a class which draws me a Circle. I obviously know the radius and the center coordinates of the circle. Let's say I want to draw a Point with a distance to the center equal to the half of the radius (r*0.5) and with an angle of 59 degrees. How can I draw the Point at the correct x and y coordinates? I coded this in Android, but I think the programming language isn't relevant for this problem, it's just something mathematical. I appreciate your help. 回答1: x = r * cos(A) + x0;

问题 Is this a valid way to calculate an angle (in radians) from one CLLocation to another? -(float)angleFromLocation:(CLLocationCoordinate2D)start toLocation:(CLLocationCoordinate2D)end { float deltaX = start.latitude - end.latitude; float deltaY = start.longitude - end.longitude; float ang = atan2(deltaY, deltaX); return ang;} Please advise! Any help will be much appreciated. 回答1: I used a variant of this question and answer and it works well: double DegreesToRadians(double degrees) {return

问题 I'm trying to apply an angle gradient to the dashes created with the code I've written inside a custom UIView class, as below. Although it needs tweaking, I'm happy with the results it produces so far. Given the input parameters in the view initialisation (below), and a frame of 768 * 768 on an iPad Air2 in portrait mode, it produces the following gauge: First gauge What I'd like to do is to cause each of the dashes to step through a user-defined gradient, e.g. green to red, much like this

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 4 years ago . I have servo motor can rotate from 0 to 180 only And I have angles range from -180 to 180 to send to servo how can i normalize between those two ranges?? And if there is any MATLAB function to do that?? thanks 回答1: You could Add 180 and divide by 2 as @High Performance Mark suggests for your

问题 I tried to calculate the angle ABC between points A, B and C. I know the math are pretty basic but I don't understand why my function give the wrong result. First, here is the code ( a contains a list [x, y, z] ) def angle(a, b, c): # Create vectors from points ba = [a[0] - b[0], a[1] - b[1], a[2] - b[2]] bc = [c[0] - b[0], c[1] - b[1], c[2] - b[2]] # Normalize vector nba = sqrt(ba[0]**2 + ba[1]**2 + ba[2]**2) ba = [ba[0]/nba, ba[1]/nba, ba[2]/nba] nbc = sqrt(bc[0]**2 + bc[1]**2 + bc[2]**2)

问题 I am trying to get the angle between the bones, such as the metacarpal bone and the proximal bone (angle of moving the finger side to side, for example the angle when your index finger is as close to your thumb as you can move it and then the angle when your index finger is as close to your middle finger as you can move it). I have tried using Vector3.Angle with the direction of the bones but that doesn't work as it includes the bending of the finger, so if the hand is in a fist it gives a