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    ڵλãҳ > ITɻ > webǰ > Webǰ˻֪ʶcanvas֪ʶ

    美女性感玉足ַ:ff00.co流行性感冒包含过咳嗽-F2F4Y5L8-S i wh Slv ZP

    е˿˵html5,html5˺ܶǩоǽҪCanvas,ô֮ˣʲô canvas?HTML5canvasԪؿɱͨJavaScript(CanvasAPI WebGLAPI)ͼμͼζԴMDN˵

    1. ע⣺ 
    2. 1.<canvas> ǩֻͼҪʹýűͼΡ 
    3. 2.Ĭ <canvas> Ԫûб߿ݡ 

    һһcanvas

    ȣҪһ(Canvas)

    1. HTML300200 
    2. <canvas id="myCan" width="300" height="200" style="border: 1px solid black"></canvas> 

    ע: ǩͨҪָһid (űо), width height ԶĻĴС.

    ʾ:HTMLҳʹöcanvasԪ.

    ڶʼʹ JavaScript ͼ

    ֮ǰҲᵽ˵canvas ԪرûлͼģԹڻƵĹҪ JavaScript ڲɣ

    JavaScript:

    1. 1.ҵ <canvas> Ԫ: 
    2. var can=document.getElementById("myCan"); 
    3. 2. context  
    4. //getContext("2d") canvasõ HTML5 ӵжֻ·ΡԲΡַԼͼķ 
    5. var c=can.getContext("2d"); 
    6. 3.fillStyleԿCSSɫ䣬ͼȡ 
    7.   //fillStyle ĬǺɫ 
    8. c.fillStyle="red"
    9.  //fillRect(x,y,width,height) ˾εǰ䷽ʽ 
    10. c.fillRect(100,50,100,100); 

    Чͼ

    Canvas

    ֪ʵcanvasʵһά ϽΪ (0,0)

    ֮ǰʹ fillRect в (100,50,100,100)

    ⼸˼ʵָcanvasϻ 100x100 ľΣ(100,50)ʼ

    ʾͼ

    IJ Canvas·

    ǿʹֵķCanvasϻߣ

    1.moveTo(x,y) ʼ

    2.lineTo(x,y)

    ʾ

    1. HTML100100 
    2. <canvas id="myCanvas" width="100" height="100"  
    3. style="border: 1px solid black"></canvas> 

    JavaScript:

    1. 忪ʼ(50,50), ͽ (100,100)Ȼʹ stroke() : 
    2. var can=document.getElementById("myCan"); 
    3. var c=can.getContext("2d"); 
    4. c.moveTo(50,50); 
    5. c.lineTo(100,100); 
    6. c.stroke(); 

    Чͼ

    ¡Webǰ˻֪ʶcanvas֪ʶѰ

    >>ĵַhttp://www-ujiuye-com.nitaroimod1ernart.com/zhuanye/2021/70197.html

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