javascript canvas draw

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.When we develop some applications such as address book, social and other applications or add new function modules, we will consider adding the number of unread information to the corresponding icon, or the icon of the new function reminder, so that it does not occupy too much space and can achieve the purpose of prompting.In the MMS analysis section, I was also asked about the implementatio

Draw a rectangle in HTML5 Canvas, html5canvasThis article describes how to draw a rectangle in HTML5 Canvas. This article uses three APIs: fillRect, strokeRect, and clearRect. For more information, see This article is translated from Steve Fulton Jeff Fulton HTML5 Canvas, C

ctx.fillstyle = color_arr[i]; ctx.fillrect (PosX, PosY + * I, width, height); ctx.moveto (PosX, PosY + * i); ctx.font = ' bold 12px Microsoft Ya Black '; //Italic 30 pixels Microsoft Jas Black font ctx.fillstyle = color_arr[i]; //"#000000"; var percent = text_arr[i] + ":" + $ * Data_arr[i] + "% "; ctx.filltext (Percent, TEXTX, texty + i); } } function init() { //Draw pie chart //proporti

First, use jquery to access the canvas elements in the DOMvar canvas = $ ("#myCanvas"); var context = Canvas.get (0). GetContext ("2d");One draw a rectangleContext.fillrect (X,y,width,height);or forContext.strokerect (X,y,width,height);X, y is the horizontal ordinate that draws the starting pointFillRect draws a fill-color rectangle (the default black), and Strok

Using canvas to draw a Cartesian coordinate system is actually quite simple. As long as the origin point () is determined, it can also be another point, as long as you know it is the origin point! After knowing the origin, draw two straight lines to the X axis and Y axis respectively (the X axis and Y axis are also opposite. This is based on your personal prefere

Html5 uses canvas to draw an image,This article describes how to use canvas to draw an image in html5. For more information, see The Code is as follows:Var canvas = document. getElementById ("canvas ");Var cxt =

One JavaScript instance every day-canvas timer dynamically updates a line, javascript-canvas Javascript defines a class for display in canvas. After an instance is generated, how can we execute corresponding mouse events on it?

You can use the rectangle drawing function of the drawing environment to draw a rectangle fillRect to draw a solid rectangle, strokeRect to draw a hollow rectangle, and clearRect to clear the specified rectangular area to make it completely transparent, the sample code is as follows: 1. Draw a rectangle

Protected void ondraw (canvas) {// drawing entry in view/** traverse the body in box2d world and draw its shape */For (body B = World. getbodylist (); B! = NULL; B = B. getnext () {XF. Set (B. gettransform (); For (fixture F = B. getfixturelist (); F! = NULL; F = f. getnext () {If (B. isactive () = false) {color. set (0.5f, 0.5f, 0.3f); drawshape (canvas, F, XF,

Javascript simple canvas development, javascript canvas The examples in this article share with you how to create a simple javascript canvas for your reference. The specific content is as follows: Html: CSS: *{margin: 0;padding:

Android: Use canvas to draw a pie chart (automatically adapts to the number/size of entries). androidcanvas The purpose of this example is to implement a simple pie chart with the following effects: Features: 1. Easy to use. You can place the content in the xml layout file and set the content in the code, that is: PieChartView pieChartView = (PieChartView) findViewById (R. id. pie_chart); PieChartView. pi

When we develop some applications such as address book, social and other applications or add new function modules, we will consider adding the number of unread information to the corresponding icon, or the icon of the new function reminder, so that it does not occupy too much space and can achieve the purpose of prompting.In the MMS analysis section, I was also asked about the implementation of this reminder. The addition of this reminder, I summed up, there are probably several ways to achieve:

Core content: 1. The Digital LED dot matrix realization Way The realization of the dot matrix is actually using a two-dimensional array, which uses the two-dimensional array of 7x10 and 4x10, when the array value is 1 o'clock to draw the red dot, when the array is 0 o'clock to draw the gray point, according to this method can also draw the English alphabet specia

Ctx. arcParameter description: (defines a center point, radius, start angle, end angle, and drawing direction: clockwise or counterclockwise ); Ctx. stroke: draws the border of the image; Ideas: 1. First Use ctx. moveTo to move the painting start point and ctx. arc to draw the path (the painting path here is not actually drawn to the canvas, just like the pen path tool in Photoshop ). 2. Use ctx. stroke ()

The code is as follows: var Canvas=document.getelementbyid ("Canvas"); var Cxt=canvas.getcontext ("2d"); Draw a hollow circle Cxt.beginpath (); Cxt.arc (200,200,50,0,360,false); cxt.linewidth=5; Cxt.strokestyle= "Green"; Cxt.stroke ()//Draw Hollow Circle Cxt.closepath (); Draw