javascript canvas draw

We often use the features provided by MMAPI to play video or take pictures, and you may want to draw some menus or graphics on the canvas. This article describes how to complete the above features on a SonyEricsson model.On the SonyEricsson JP7 model, it is easy to implement the above features. You only need to specify some specific parameters when initializing the Videocontrol. For exampleVideocontrol.init

();var irest= (Idateend-odatenow.gettime ())/1000;var iused= (Odatenow.gettime ()-idatestart)/1000;var Scale=iused/iremain;if ((inper/100) {return false;}else if ((inper/100) >scale){Inper=100*scale;var iusepi=-math.pi/2+rad*iused;}Grey CircleCircle2 (OBJ,CONTEXT,CENTERX,CENTERY,R);if (irest{Return}CountdownTimereduce (Irest, timetxt);Yellow BezelYellarc (CONTEXT,CENTERX,CENTERY,R,IUSEPI);PercentageDrawperback (Context,centerx, Centery,iusepi, N, a, ten, ' Fill ', scale);}Window.onload = functi

This article mainly introduced the HTML5 in the canvas how to draw the information of the method of the clock, small series think that HTML is really more and more powerful, and now share to everyone, but also for everyone to do a reference. For the little Friends of HTML, you can follow the small part together. This article describes how canvas can be used to

The following example demonstrates using a path to draw a triangle and fill it. 1, draw attention to the following two places: (1) After the path has been drawn, call Closepath () to explicitly close the path.(2) Look at the following code I actually only painted two edges, because Closepath () will automatically draw a line between the last drawing point and

Author: Benedict Ching JuneOriginal address: http://blog.csdn.net/qingdujun/article/details/32930501First, draw the rectangleThe canvas uses the origin point (0,0) in the upper-left coordinate system and increments the x-coordinate to the right. The y-coordinate is incremented downward.Draws a rectangle using the rectangle drawing function of the paint environment. FillRect (x,y,width,height) : Dra

Html5 uses canvas to draw triangles, html5canvas trianglesThis article describes how to use canvas to draw triangles in html5. For more information, see The Code is as follows:Var canvas = document. getElementById ("canvas ");Var

DOCTYPE HTML>HTML>HeadLang= "en"> MetaCharSet= "UTF-8"> title>title>Head>Bodyonload= "star ()">CanvasID= "Canvas"width= "$"Height= "$"style= "border:1px #ccc solid;">Canvas>Body>HTML>Canvas Draw Pentagram

CanvasID= "Can"Width= "150"Height= "150"> Canvas> CTX. Arc Parameter 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

;Notice = info[0] + info1[0];}Probabilityelse if (num = 1) {Angles = 2160 * Rotnum + 1845;Notice = info[7] + info1[7];}Probabilityelse if (num = 2) {Angles = 2160 * rotnum + 1890;Notice = info[6] + info1[6];}Probabilityelse if (num = 3) {Angles = 2160 * Rotnum + 1935;Notice = info[5] + info1[5];}Probabilityelse if (num = 4) {Angles = 2160 * Rotnum + 1980;Notice = info[4] + info1[4];}Probabilityelse if (num = 5) {Angles = 2160 * rotnum + 2025;Notice = info[3] + info1[3];}Probabilityelse if (num =

In a canvas drawing, an "arc" can be either an integral circle or a part of a circle. The code is as follows: Context.arc () Context.arc (x, y, radius, startangle, Endangle, anticlockwise) In the above method description, X and Y define the center of the circle, and radius defines the radius of the circumference. StartAngle and Endangle are expressed in polar coordinates. Anticlockwise (Boolean value) defines the direction of the arc. For example

first, draw the textTwo methods are provided in the drawing environment for drawing text in canvas.Stroketext (text,x,y): Draws hollow text at (x,y).Filltext (text,x,y): (x,y) draws a solid text.second, draw text in canvasThe code is as follows: //This function will be called after the page is fully loaded function pageLoaded () { //Get a reference to the c