【canvas】 绘制七巧板

效果图:

代码 ：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title></title>
</head>
<body>
    <canvas id="canvas" width="600" height="600" style="border-radius: 10px;">您的浏览器不支持canvas，请更换浏览器</canvas>

    <script>

        let canvas = document.getElementById("canvas");

        let datas = [
            {
                p:[
                    {x:0,y:0},{x:600,y:0},{x:300,y:300}
                ],
                color:"#3498db"
            },
            {
                p:[
                    {x:0,y:0},{x:0,y:600},{x:300,y:300}
                ],
                color:"#f1c40f"
            },
            {
                p:[
                    {x:0,y:600},{x:300,y:600},{x:150,y:450}
                ],
                color:"#e67e22"
            },
            {
                p:[
                    {x:150,y:450},{x:300,y:300},{x:450,y:450},{x:300,y:600}
                ],
                color:"#e74c3c"
            },
            {
                p:[
                    {x:300,y:600},{x:600,y:300},{x:600,y:600},{x:300,y:600}
                ],
                color:"#9b59b6"
            },
            {
                p:[
                    {x:600,y:300},{x:450,y:450},{x:300,y:300},{x:450,y:150},{x:600,y:300}
                ],
                color:"#2c3e50"
            },
            {
                p:[
                    {x:600,y:0},{x:600,y:300},{x:450,y:150}
                ],
                color:"#95a5a6"
            },
        ]

        if(canvas.getContext("2d")){
            let context = canvas.getContext("2d");
            for (let i = 0; i < datas.length; i++) {
                seniorDraw(datas[i].p,datas[i].color,context);
            }

        }

        function seniorDraw(pies,color,context){
            context.beginPath();
            context.moveTo(pies[0].x,pies[0].y);
            for (let i = 1; i < pies.length; i++) {
                context.lineTo(pies[i].x,pies[i].y);
            }
            context.closePath();
            context.fillStyle = color;
            context.fill();
        }

        // 普通绘制
        function ordinaryDraw(){

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

            context.beginPath();
            context.moveTo(0,0);
            context.lineTo(600,0);
            context.lineTo(300,300);
            context.closePath();
            context.fillStyle = "#3498db";
            context.fill();

            context.beginPath();
            context.moveTo(0,0);
            context.lineTo(0,600);
            context.lineTo(300,300);
            context.closePath();
            context.fillStyle = "#f1c40f";
            context.fill();

            context.beginPath();
            context.moveTo(0,600);
            context.lineTo(300,600);
            context.lineTo(150,450);
            context.closePath();
            context.fillStyle = "#e67e22";
            context.fill();

            context.beginPath();
            context.moveTo(150,450);
            context.lineTo(300,300);
            context.lineTo(450,450);
            context.lineTo(300,600);
            context.closePath();
            context.fillStyle = "#e74c3c";
            context.fill();

            context.beginPath();
            context.moveTo(300,600);
            context.lineTo(600,300);
            context.lineTo(600,600);
            context.lineTo(300,600);
            context.closePath();
            context.fillStyle = "#9b59b6";
            context.fill();

            context.beginPath();
            context.moveTo(600,300);
            context.lineTo(450,450);
            context.lineTo(300,300);
            context.lineTo(450,150);
            context.lineTo(600,300);
            context.closePath();
            context.fillStyle = "#2c3e50";
            context.fill();

            context.beginPath();
            context.moveTo(600,0);
            context.lineTo(600,300);
            context.lineTo(450,150);
            context.closePath();
            context.fillStyle = "#95a5a6";
            context.fill();
        }

    </script>
</body>
</html>