animation

Animate a Circle around another circle

孤人 提交于 2020-03-26 03:37:33
问题 I'm using react-native-svg. I'd like to animate a small circle around another bigger circle. This question is similar to this one. The animation is not tied to any gesture but time. The rotation should take a predefined delay in seconds to complete and should be as smooth as possible. Is it possible to do that with react-native-svg? To be complete, I have to say that there are other small circles that are plotted every seconds. This is already working by mutating the state every second. But

CSS3学习总结

眉间皱痕 提交于 2020-03-25 19:46:49
CSS3 边框 border-radius 用于创建圆角 box-shadow 用于向方框添加阴影 border-image 可以使用图片来创建边框 CSS3 背景 background-size 规定背景图片的尺寸 background-origin 规定背景图片的定位区域 CSS3 文本效果 text-shadow 可向文本应用阴影 word-wrap 允许强制文本换行 CSS3 @font-face 规则   在新的 @font-face 规则中,您必须首先定义字体的名称(比如 myFirstFont),然后指向该字体文件。 如需为 HTML 元素使用字体,请通过 font-family 属性来引用字体的名称 (myFirstFont) CSS3 2D 转换 2D Transform 方法 transform 向元素应用 2D 或 3D 转换。 函数 描述 matrix( n , n , n , n , n , n ) 定义 2D 转换,使用六个值的矩阵。 translate( x , y ) 定义 2D 转换,沿着 X 和 Y 轴移动元素。 translateX( n ) 定义 2D 转换,沿着 X 轴移动元素。 translateY( n ) 定义 2D 转换,沿着 Y 轴移动元素。 scale( x , y ) 定义 2D 缩放转换,改变元素的宽度和高度。 scaleX

Java Swing applicaion gif animation leaving a trail

五迷三道 提交于 2020-03-25 17:51:12
问题 Hey all I am wondering if I can fix my animation issue. Currently it does animate just fine but with one issue - it seems to leave training images behind as it animates. This is my code I am using: import java.awt.BorderLayout; import java.awt.Color; import java.awt.Font; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Image; import java.awt.Point; import java.awt.RenderingHints; import java.awt.Toolkit; import java.awt.event.ActionEvent; import java.awt.event

Animation only works on one button (ripple view)

会有一股神秘感。 提交于 2020-03-25 17:43:05
问题 Site used: https://material.io/develop/ios/components/ripple/ Here is my code: import MaterialComponents.MaterialRipple class ViewController: UIViewController { // let rippleView = MDCRippleView() let rippleTouchController = MDCRippleTouchController() @IBOutlet weak var playBtn: UIButton! @IBOutlet weak var levelsBtn: UIButton! @IBOutlet weak var topicsBtn: UIButton! @IBOutlet weak var settingsBtn: UIButton! @IBOutlet weak var instaBtn: UIButton! override func viewDidLoad() { super

Updating animation variable

巧了我就是萌 提交于 2020-03-23 08:02:09
问题 I am trying to write a program to simulate the orbit of 2 bodies. I have been able to create an animation of the orbits of the 2 bodies and am trying to add a counter at the top corner of the animation to display the kinetic energy of the system. I have the kinetic energies stored in a list called "ke" and want the animation to display the values in the list corresponding to the positions of the bodies. However, when I try to write the code needed to display the kinetic energies I have to

Android Animation学习笔记

霸气de小男生 提交于 2020-03-23 07:16:41
关于动画的实现,Android提供了Animation,在Android SDK介绍了2种Animation模式: 1. Tween Animation:通过对场景里的对象不断做图像变换(平移、缩放、旋转)产生动画效果,即是一种渐变动画; 2. Frame Animation:顺序播放事先做好的图像,是一种画面转换动画。 动画类型 下面先来看看Android提供的动画类型。Android的animation由四种类型组成 在XML文件中: alpha 渐变透明度动画效果 scale 渐变尺寸伸缩动画效果 translate 画面转换位置移动动画效果 rotate 画面转移旋转动画效果 在Java 源码中定义了相应的类,可以使用这些类的方法来获取和操作相应的属性: AlphaAnimation渐变透明度动画效果 ScaleAnimation渐变尺寸伸缩动画效果 TranslateAnimation画面转换位置移动动画效果 RotateAnimation画面转移旋转动画效果 Tween Animation 一个tween动画将对视图对象中的内容进行一系列简单的转换(位置,大小,旋转,透明性)。如果你有一个文本视图对象,你可以移动它,旋转它,让它变大或让它变小,如果文字下面还有背景图像,背景图像也会随着文件进行转换。 使用XML来定义Tween Animation

Core Animation(核心动画)

走远了吗. 提交于 2020-03-20 21:23:57
iOS开发UI篇—核心动画简介 一、简单介绍 Core Animation,中文翻译为核心动画,它是一组非常强大的动画处理API,使用它能做出非常炫丽的动画效果,而且往往是事半功倍。也就是说,使用少量的代码就可以实现非常强大的功能。 Core Animation是跨平台的,可以用在Mac OS X和iOS平台。 Core Animation的动画执行过程都是在后台操作的,不会阻塞主线程。不阻塞主线程,可以理解为在执行动画的时候还能点击(按钮)。 要注意的是,Core Animation是直接作用在CALayer上的,并非UIView。 二、Core Animation的使用步骤 1.使用它需要先添加QuartzCore.framework框架和引入主头文件<QuartzCore/QuartzCore.h>(iOS7不需要) 2.初始化一个CAAnimation对象,并设置一些动画相关属性 3.通过调用CALayer的addAnimation:forKey:方法增加CAAnimation对象到CALayer中,这样就能开始执行动画了 4.通过调用CALayer的removeAnimationForKey:方法可以停止CALayer中的动画 三、CAAnimation 类的继承结构图    CAAnimation是所有动画类的父类,但是它不能直接使用,应该使用它的子类。 常见属性有:

Moviepy zooming effects need tweaking

99封情书 提交于 2020-03-18 15:42:42
问题 I would like to zoom a clip to a certain dimension, then stop further zooming. In other words, the clip stop further increasing its size after reaching a certain size, and its better if the clip start zooming from much smaller of its original size, and to a bigger version. I am using moviepy module. With the following code I can progressively zoom a clip, but having a hard time figuring out how to grow a clip from small to big, creating an animated effect. Any feedback you provide is greatly

Moviepy zooming effects need tweaking

|▌冷眼眸甩不掉的悲伤 提交于 2020-03-18 15:40:08
问题 I would like to zoom a clip to a certain dimension, then stop further zooming. In other words, the clip stop further increasing its size after reaching a certain size, and its better if the clip start zooming from much smaller of its original size, and to a bigger version. I am using moviepy module. With the following code I can progressively zoom a clip, but having a hard time figuring out how to grow a clip from small to big, creating an animated effect. Any feedback you provide is greatly

CSS3学习基本记录

僤鯓⒐⒋嵵緔 提交于 2020-03-18 14:03:00
CSS3 边框 border-radius: 圆角 border-radius: 15px 50px 70px 100px; 左上 右上 右下 左下 box-shadow:阴影 box-shadow:1px 2px 3px #ccc; 1px:水平位移 2px:竖直 border-image:边框图片 border-image: source slice width outset repeat; border-image:url(border.png) 30 round; 用图片border.png 30出的地方 重复合理的重复 stretch:默认值。拉伸图像来填充区域 repeat:平铺(repeated)图像来填充区域 round:类似 repeat 值。如果无法完整平铺所有图像,则对图像进行缩放以适应区域。 border-image-source:于指定要用于绘制边框的图像的位置 border-image-slice:图像边界向内偏移 border-image-width:图像边界的宽度 border-image-outset:用于指定在边框外部绘制 border-image-area 的量 border-image-repeat:这个例子演示了如何创建一个border-image 属性的按钮 CSS3 背景 background-size:设置背景图标大小