rotation

问题 I'm trying to add labels to the planets around the sun into this example : http://bl.ocks.org/djvanderlaan/4953593. So far, I've managed to add the labels, but the orientation of the labels is rotating with their position, while I want to keep them horizontal for the comfort of the readers. I've been finding a beginning of a solution to my problem here : how to keep text orientation unchanged during rotation in SVG but it's seems very complicated to me (I am a newbie and really not good at

问题 I would like to create a storyboard that animates two TextBlocks by sliding them from right and left in the center of the Screen. I have tried rotating the TextBlocks and using Global Offset and Local Offset properties of Projection in Blend for Visual Studio and also manually using Translate X and Translate Y properties of the RenderTransform at specific Keyrames . The storyboard does kick off and appears perfect in Blend but when running on the actual device, the TextBlocks don't appear in

问题 I think this question is not a duplicate, or if it is, I couldn't understand how to make this work. (sorry for my great drawing capabilities...) I have a ball, radius 0.5 (so, perimeter is 3.1415926). In each frame, I have it in oldPosition and I want to place it in position , so, move in the blue arrow direction, represented by the v vector in the drawing. This is easy. The trick is that I want the ball to be rotated in the target position. The rotation axis should be perpendicular to the

问题 I'm looking for information on what goes on in a rotation function that modifies a 2d matrix. I found this, but assigning the rotation to 90, 180, or 270 renders no change. Here's my code: Matrix.prototype.rotate = function(deg) { var radians = deg * Math.PI / 180, sin = Math.sin(radians), cos = Math.cos(radians), a = this.a, b = this.b, c = this.c, d = this.d, tx = this.tx, ty = this.ty; this.a = a*cos - b*sin; this.b = a*sin + b*cos; this.c = c*cos - d*sin; this.d = c*sin + d*cos; this.tx =

问题 I found a code about image rotation in frequency domain. But I couldn't understand this code. This code works correct. Can anyone describe this code? Actually I have to write a code to rotate an image in frequency domain in polar coordinates. Do you think this code meet the requirements. clear; img=imread('cameraman.tif'); imshow(img); title('original image'); theta=26,5; N=size(img,1); M=size(img,2); fimg=fftshift(fft2(fftshift(img))); p=ones(N,1)*[-N/2:(N-1)/2]; % horizontal axis q=-p'; %

问题 I have a little problem with my website. People use this page to create a post on my site, you can attach photos to it. All photos were working ecept that one. ( see below for the link ) When I try to upload it on the "post" page it says: My girlfriend is the one that is trying to upload it , before uploading it she rotate the picture with windows 7 ( in preview mode ) so the image would be on the right side. PHP Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate

问题 I am trying to rotate a sphere with user control. void RotateGlobe() { SetLock(); if (Input.GetMouseButton(0)) { Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition); userInput.x = Input.GetAxis("Mouse X"); userInput.y = Input.GetAxis("Mouse Y"); if (userInput.magnitude > 0 & Physics.Raycast(ray, Mathf.Infinity, LayerMask.NameToLayer("UI"))) { Vector2 movement = new Vector2(Mathf.Sign(userInput.x), Mathf.Sign(userInput.y)); globe.transform.rotation = Quaternion.Slerp(globe.transform

问题 I want to create a flip effect that fires on mouseover and flips back to the front panel on mouse out.. so there has to be a front and a back-side of the card that should flip: HTML: <div class="card"> <div class="front"> Front-Content </div> <div class="back"> Back-Content </div> </div> <div class="card"> <div class="front"> 2nd Front-Content </div> <div class="back"> 2nd Back-Content </div> </div> So as you can see I want multiple cards to flip to their back-sides on mouseover. I think the

问题 I want to create a flip effect that fires on mouseover and flips back to the front panel on mouse out.. so there has to be a front and a back-side of the card that should flip: HTML: <div class="card"> <div class="front"> Front-Content </div> <div class="back"> Back-Content </div> </div> <div class="card"> <div class="front"> 2nd Front-Content </div> <div class="back"> 2nd Back-Content </div> </div> So as you can see I want multiple cards to flip to their back-sides on mouseover. I think the

问题 I have a pan gesture on a button that moves the button in the direction of the pan. When the translation is "far enough" the button gets rotated. On this rotation the button visible goes to its initial position or close and then back where it should be. Cannot figure out what is going on. This is my code: @IBAction func didPanButton(_ sender: UIPanGestureRecognizer) { print("Did pan button", sender.translation(in: sender.view).x) answerButton.center.x = view.center.x + sender.translation(in: