position

Position calculation of small model of a car using Accelerometer + Gyroscope

由 天涯浪子 提交于 2020-01-01 19:22:17
问题 I wish to calculate position of a small remote controlled car (relative to starting position). The car moves on a flat surface for example: a room floor. Now, I am using an accelerometer and a gyroscope. To be precise this board --> http://www.sparkfun.com/products/9623 As a first step I just took the accelerometer data in x and y axes (since car moves on a surface) and double integrated the data to get position. The formulae I used were: vel_new = vel_old + ( acc_old + ( (acc_new - acc_old )

How to keep an image centered and responsive?

由 不问归期 提交于 2020-01-01 11:59:07
问题 I have an image, centered both, horizontally and vertically #logo01{ position:absolute; top:50%; left:50%; margin-top:-146px; // half of height margin-left:-229px; // half of width cursor:pointer; } Now I need a responsive design, so: #logo01{ max-width:45%; max-height:45%; } It works, but position is lost. How can I keep the image centered and responsive at the same time ? 回答1: This is a dirty way around: JSFiddle <div class="shadow"><img class="logo" src="http://placehold.it/1000x1000" /><

Position absolute and margin: auto

由 给你一囗甜甜゛ 提交于 2020-01-01 09:18:40
问题 I've got a small problem, I want my footer to stay at the bottom of the screen with position: absolute . But my margin: auto to put it in the middle of the screen isn't working anymore. html: <!DOCTYPE html> <html> <head> <meta http-equiv='Content-Type' content='Type=text/html; charset=utf-8'> <link rel="shortcut icon" href="../IMAGES/favicon.ico"> <title>TEST</title> <link href='http://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'> <link rel="stylesheet"

Magento 1.9.1 not sorting Configurable product attributes dropdown by position

由 [亡魂溺海] 提交于 2020-01-01 08:45:07
问题 Fresh install of Magento 1.9.1. Magento is ignoring the attribute position set in Catalogue->Attributes->Manage Attributes->Manage Labels/Options for a configurable product drop down. Instead it is using the Product ID to determine list order. Have compared the following files/functions and, apart from a small tax calculation, none of the code has changed since 1.7.0.2. Mage/Catalog/Model/Product/Type/Configuarable.php: public function getConfigurableAttributes($product = null) Mage/Catalog

Magento 1.9.1 not sorting Configurable product attributes dropdown by position

由 自作多情 提交于 2020-01-01 08:44:12
问题 Fresh install of Magento 1.9.1. Magento is ignoring the attribute position set in Catalogue->Attributes->Manage Attributes->Manage Labels/Options for a configurable product drop down. Instead it is using the Product ID to determine list order. Have compared the following files/functions and, apart from a small tax calculation, none of the code has changed since 1.7.0.2. Mage/Catalog/Model/Product/Type/Configuarable.php: public function getConfigurableAttributes($product = null) Mage/Catalog

rotate image with css

由 大憨熊 提交于 2020-01-01 08:02:20
问题 I would like to rotate an image by 90 degrees with CSS only. I can do the rotation, but then the position of the image is not what it should be. First, it will overlay some other elements in the same div, and second, its vertical dimension will become bigger than the containing div. Here is my code where the two classes are defined. .imagetest img { transform: rotate(270deg); -ms-transform: rotate(270deg); -moz-transform: rotate(270deg); -webkit-transform: rotate(270deg); -o-transform: rotate

jquery animate position in percentage

由 与世无争的帅哥 提交于 2020-01-01 02:10:37
问题 how do I determine the positions in percentages? $(document).ready(function(){ $("#button").toggle(function(){ $("#slide").animate({top:-100%},1000); },function(){ $("#slide").animate({top:0%},1000); }); }); Please suggest. 回答1: $(document).ready(function(){ $("#button").toggle(function(){ $("#slide").animate({top:'-100%'},1000); },function(){ $("#slide").animate({top:'0%'},1000); }); }); Add quotes. (I used single quotes, but js doesn't care if it is ' or ") 来源： https://stackoverflow.com

Relative parent, absolute positioning vertically by percentage?

由 烈酒焚心 提交于 2019-12-31 18:55:50
问题 I'm trying to create a vertically positioned DIV by percentage. I have the parent container to set to relative and the content div set to absolute. This works fine when I position the content div with pixels, but when I try percentages the percentages are disregarded: .container { position: relative; } .content { position: absolute; left: 10%; top: 50%; } <div class="container"><div class="content"> This is the content div. It should be 10% from the left of the container div. </div></div> The

CSS样式属性

由 浪尽此生 提交于 2019-12-31 12:38:26
CSS属性 属性1 宽和高 width 属性可以为元素设置宽度 height 属性可以为元素设置高度 PS：只有块级标签才可以设置宽度，内联标签的宽度由内容决定。 属性2 字体属性 文字字体： font-family 可以存放多种字体，如果浏览器不支持第一种字体会自动尝试下一种，浏览器会使用它能识别的第一种字体。如果到最后都没有浏览器支持的字体，那么就会使用浏览器的默认字体显示。 body { font-family: "Microsoft Yahei", "微软雅黑", "Arial" } 字体大小： font-size ，可以设置为数字px形式和 inherit ，设置为 inherit 表示继承父元素的字体大小值。 字重： font-weight 用来设置字体的字重（粗细）。 值 描述 normal 默认值，标准粗细 bold 粗体 bolder 更粗 lighter 更细 100~900 设置具体粗细，400等同于normal，而700等同于bold inherit 继承父元素字体的粗细值 字体颜色： color 用于设置字体的颜色，颜色可以通过三种形式指定： 十六进制：如：#FF000 (前两位表示Red，中间两位表示Green，最后两位表示Blue) 一个RGB值： 如： RGB(255,0,0) (第一个数字表示Red，第二个数字表示Green，第三个数字表示Blue

Jquery中的offset()和position()深入剖析

由 对着背影说爱祢 提交于 2019-12-31 06:56:05
jquery 中有两个获取元素位置的方法offset()和position()，这两个方法之间有什么异同？使用的时候应该注意哪些问题？什么时候使用offset(),什么时候又使用position()呢？ 先看看这两个方法的定义。 offset(): 获取匹配元素在当前视口的相对偏移。 返回的对象包含两个整形属性：top 和 left。此方法只对可见元素有效。 position(): 获取匹配元素相对父元素的偏移。 返回的对象包含两个整形属性：top 和 left。为精确计算结果，请在补白、边框和填充属性上使用像素单位。此方法只对可见元素有效。 真的就这么简单吗？实践出真知。 先来看看在jquery框架源码里面，是怎么获得position()的： 代码如下: // Get *real* offsetParent var offsetParent = this.offsetParent(), // Get correct offsets offset = this.offset(), parentOffset = /^body|html$/i.test(offsetParent[0].tagName) ? { top: 0, left: 0 } : offsetParent.offset(); // Subtract element margins // note: when an
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