学习Canvas绘图与动画基础绘制多条路径（四）

 1 <!DOCTYPE html>

 2 <html>

 3 <head lang="en">

 4    <meta charset="UTF-8">

 5    <title>绘制多个路径</title>

 6 </head>

 7 <body>

 8    <canvas id="canvas" style="border:1px solid #aaa; display:block;margin:30px auto;">

 9      当前浏览器不支持Canvas,请更换浏览器

10    </canvas>

11    <script>

12       var canvas=document.getElementById('canvas');

13       canvas.width=1024;

14       canvas.height=768;//也可以在这里设置width和height

15       var context=canvas.getContext('2d');

16       //使用context进行绘制

17

18       context.beginPath();

19       context.moveTo(100,100);

20       context.lineTo(700,700);

21       context.lineTo(100,700);

22       context.lineTo(100,100);

23       context.closePath();

24

25       context.lineWidth=5;

26       context.strokeStyle="red";

27       context.stroke();

28

29       context.beginPath();

30       context.moveTo(200,100);

31       context.lineTo(700,600);

32       context.closePath();

33       context.strokeStyle="black";

34       context.stroke();

35    </script>

36    <!--

37       1.多个路径需用context.beginPath();和context.closePath();包裹起来，否则上面的样式会被下面覆盖

38     -->

39 </body>

40 </html>

实例:制作七巧板

 1 <!DOCTYPE html>

 2 <html>

 3 <head lang="en">

 4    <meta charset="UTF-8">

 5    <title>制作七巧板</title>

 6 </head>

 7 <body>

 8    <canvas id="canvas" style="border:1px solid #aaa; display:block;margin:50px auto;">

 9      当前浏览器不支持Canvas,请更换浏览器

10    </canvas>

11    <script>

12     var tangram=[

13          {p:[{x:0,y:0},{x:800,y:0},{x:400,y:400}],color:"#caff67"},

14          {p:[{x:0,y:0},{x:400,y:400},{x:0,y:800}],color:"#67becf"},

15          {p:[{x:800,y:0},{x:800,y:400},{x:600,y:600},{x:600,y:200}],color:"#ef3d61"},

16          {p:[{x:600,y:200},{x:600,y:600},{x:400,y:400}],color:"#f9f51a"},

17          {p:[{x:400,y:400},{x:600,y:600},{x:400,y:800},{x:200,y:600}],color:"#a594c0"},

18          {p:[{x:200,y:600},{x:400,y:800},{x:0,y:800}],color:"#fa8eee"},

19          {p:[{x:800,y:400},{x:800,y:800},{x:400,y:800}],color:"#f6ca29"}

20     ]

21     window.onload=function(){

22        var canvas=document.getElementById("canvas");

23        canvas.width=800;

24        canvas.height=800;

25        var context=canvas.getContext("2d");

26        for(var i=0;i<tangram.length;i++){

27           draw(tangram[i],context)

28        }

29     }

30     function draw(piece,cxt){

31       cxt.beginPath();

32       cxt.moveTo(piece.p[0].x,piece.p[0].y);

33       for(var i=1;i<piece.p.length;i++){

34          cxt.lineTo(piece.p[i].x,piece.p[i].y);

35       }

36       cxt.fillStyle=piece.color;

37       cxt.fill();

38

39       cxt.strokeStyle="black";

40       cxt.lineWidth=3;

41       cxt.stroke();

42     }

43    </script>

44

45 </body>

46 </html>

效果如下：

巴特西

学习Canvas绘图与动画基础绘制多条路径（四）

最新文章

热门文章

巴特西

学习Canvas绘图与动画基础 绘制多条路径（四）

最新文章

热门文章

学习Canvas绘图与动画基础绘制多条路径（四）