curve

Draw a curve with css

由 为君一笑 提交于 2019-11-27 04:20:30
问题 I want to create an animation with css that simulate a wave movement. I need to change a line-or div- to a curve for this... The CSS rules that I'm familiar to, make the entire div to semicircular or change element border. For example: border-radius , or perspective or border-top-radius ... This image show you what I want: Do you have experience about this? or is it possible? Thanks in Advance... 回答1: You could use an asymmetrical border to make curves with CSS. border-radius: 50%/100px 100px

“Tunnel Failed” exception in BlackBerry Curve 8520

由 血红的双手。 提交于 2019-11-27 01:54:41
Phone model:bb curve 8520 Phone version:4.6.1.314 Carrier :airtel india APN :airtelgprs.com No username and password I am using the following code: String url="http://<address>:<port>/path;deviceside=true"; HttpConnection conn =(HttpConnection)Connector.open(url,Connector.READ_WRITE,true); int response=conn.getResponseode(); if(responsecode==HttpConnection.HTTP_OK) { //...code for handling the response... } This code is throwing a "tunnel failed " exception. I am unable to understand the reason behind it. The APN is properly defined in the phone according to the network carrier. I am able to

Equidistant points across Bezier curves

由 风格不统一 提交于 2019-11-27 01:29:27
问题 Currently, I'm attempting to make multiple beziers have equidistant points. I'm currently using cubic interpolation to find the points, but because the way beziers work some areas are more dense than others and proving gross for texture mapping because of the variable distance. Is there a way to find points on a bezier by distance rather than by percentage? Furthermore, is it possible to extend this to multiple connected curves? 回答1: distance between P_0 and P_3 (in cubic form), yes, but I

transparent shape with arrow in upper corner

由 柔情痞子 提交于 2019-11-26 21:50:05
问题 Please see the image below. I want to add an arrow to the top right of a div which I am treating as editable input box. Please help me how I can achieve this using CSS. I cannot use a SVG since I need this as a div to show emoticons as images over it. <div placeholder="Your message" id="Message"> ... </div> 回答1: You can do it like in the below snippet. The method used to achieve the shape is as given below: The main div element only has a top, bottom and left border. The right border is

Quadratic Bézier Curve: Calculate Points

由 百般思念 提交于 2019-11-26 21:27:08
I'd like to calculate a point on a quadratic curve. To use it with the canvas element of HTML5. When I use the quadraticCurveTo() function in JavaScript, I have a source point, a target point and a control point. How can I calculate a point on the created quadratic curve at let's say t=0.5 with "only" knowing this three points? xan Use the quadratic Bézier formula, found, for instance, on the Wikipedia page for Bézier Curves : In pseudo-code, that's t = 0.5; // given example value x = (1 - t) * (1 - t) * p[0].x + 2 * (1 - t) * t * p[1].x + t * t * p[2].x; y = (1 - t) * (1 - t) * p[0].y + 2 *

Closest point on a cubic Bezier curve?

由 ℡╲_俬逩灬. 提交于 2019-11-26 20:03:28
How can I find the point B(t) along a cubic Bezier curve that is closest to an arbitrary point P in the plane? Adrian Lopez After lots of searching I found a paper that discusses a method for finding the closest point on a Bezier curve to a given point: Improved Algebraic Algorithm On Point Projection For Bezier Curves , by Xiao-Diao Chen, Yin Zhou, Zhenyu Shu, Hua Su, and Jean-Claude Paul. Furthermore, I found Wikipedia and MathWorld's descriptions of Sturm sequences useful in understanding the first part of the algoritm, as the paper itself isn't very clear in its own description. I've

svg multiple color on circle stroke

由 China☆狼群 提交于 2019-11-26 19:24:57
问题 i want to create a rainbow circle like the picture below: but how can i draw the curved and multiple color stop gradient? here's my current code: <svg width="500" height="500" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> <defs> <linearGradient id="test"> <stop offset="0%" stop-color="#f00"/> <stop offset="100%" stop-color="#0ff"/> </linearGradient> </defs> <circle cx="50" cy="50" r="40" fill="none" stroke="url(#test)" stroke-width="6"/> </svg> 回答1: This

Draw a quadratic Bézier curve through three given points

由 99封情书 提交于 2019-11-26 18:01:33
问题 I have three points in 2D and I want to draw a quadratic Bézier curve passing through them. How do I calculate the middle control point ( x1 and y1 as in quadTo)? I know linear algebra from college but need some simple help on this. How can I calculate the middle control point so that the curve passes through it as well? 回答1: Let P0, P1, P2 be the control points, and Pc be your fixed point you want the curve to pass through. Then the Bezier curve is defined by P(t) = P0*t^2 + P1*2*t*(1-t) +

Gradient Stroke Along Curve in Canvas

由 僤鯓⒐⒋嵵緔 提交于 2019-11-26 16:45:24
问题 I'm trying to draw a curve in canvas with a linear gradient stoke style along the curve, as in this image. On that page there is a linked svg file that gives instructions on how to accomplish the effect in svg. Maybe a similar method would be possible in canvas? 回答1: A Demo: http://jsfiddle.net/m1erickson/4fX5D/ It's fairly easy to create a gradient that changes along the path : It's more difficult to create a gradient that changes across the path : To create a gradient across the path you

ggplot2: histogram with normal curve

由 偶尔善良 提交于 2019-11-26 15:37:45
问题 I've been trying to superimpose a normal curve over my histogram with ggplot 2. My formula: data <- read.csv (path...) ggplot(data, aes(V2)) + geom_histogram(alpha=0.3, fill='white', colour='black', binwidth=.04) I tried several things: + stat_function(fun=dnorm) ....didn't change anything + stat_density(geom = "line", colour = "red") ...gave me a straight red line on the x-axis. + geom_density() doesn't work for me because I want to keep my frequency values on the y-axis, and want no density
订阅 curve