HTML5之Canvas绘图(二) ——应用篇之七巧板

时间：2021-03-11 18:45:40

1.canvas绘制七巧板--

<!DOCTYPE html>

<html>

<head>

    <meta charset="UTF-8">

    <title>七巧板</title>

</head>

<body>

<canvas id="c1" style="border: 1px solid gray;"></canvas>

<script type="text/javascript">

    var tangram = [

        {p:[{x:0,y:0},{x:800,y:0},{x:400,y:400}],color:"yellow"},

        {p:[{x:0,y:0},{x:400,y:400},{x:0,y:800}],color:"pink"},

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

        {p:[{x:600,y:200},{x:600,y:600},{x:400,y:400}],color:"blue"},

        {p:[{x:400,y:400},{x:600,y:600},{x:400,y:800},{x:200,y:600}],color:"red"},

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

        {p:[{x:400,y:800},{x:800,y:400},{x:800,y:800}],color:"lightblue"}

    ];

    function draw(c,shape)

    {

        c.beginPath();  //开始绘制一个路径

        c.moveTo(shape.p[0].x,shape.p[0].y);//移到要绘制的图形的第一个坐标处

        c.fillStyle = shape.color;

        for (var i = 1; i < shape.p.length; i++) //依次绘制到后续坐标

            c.lineTo(shape.p[i].x,shape.p[i].y);

        c.closePath();  //结束一个路径的绘制

        c.fill();

    }

    window.onload = function(){

        var canvas = document.getElementById("c1");

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

        canvas.width =800;

        canvas.height = 800;

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

            draw(context,tangram[i]);

        }

    };

</script>

</body>

</html>

七巧板源码

HTML5之Canvas绘图(二) ——应用篇之七巧板

2.canvas绘制七巧板--小猫咪

<!doctype html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>七巧板--小猫</title>

</head>

<body>

<canvas id="mycanvas"></canvas>

<script type="text/javascript">

    (function(id){

        var tangram=[

            {p:[{x:520,y:40},{x:520,y:170},{x:595,y:110}],color:"#FDAD05"},

            {p:[{x:595,y:110},{x:670,y:46},{x:670,y:170}],color:"#FC7861"},

            {p:[{x:670,y:170},{x:595,y:110},{x:520,y:170},{x:595,y:246}],color:"#F2DE0C"},

            {p:[{x:595,y:246},{x:432,y:390},{x:602,y:555}],color:"#CA9964"},

            {p:[{x:595,y:246},{x:712,y:350},{x:600,y:465}],color:"#6CA4A7"},

            {p:[{x:432,y:390},{x:430,y:620},{x:670,y:620}],color:"#F54C42"},

            {p:[{x:175,y:528},{x:341,y:535},{x:430,y:620},{x:250,y:610}],color:"#9ECF00"}

        ]

        var canvas=document.getElementById(id);

        canvas.width=1090;

        canvas.height=880;

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

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

        {

            context.beginPath();

            context.moveTo(tangram[i].p[0].x,tangram[i].p[0].y);

            for(var j=1;j<tangram[i].p.length;j++){

                context.lineTo(tangram[i].p[j].x,tangram[i].p[j].y);

            }

            context.closePath();

            context.fillStyle=tangram[i].color;

            context.strokeStyle=tangram[i].color;

            context.fill();

            context.stroke();

        }

    })('mycanvas')

</script>

</body>

</html>

七巧板--小猫咪

HTML5之Canvas绘图(二) ——应用篇之七巧板

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