canvas 立体图 - 代码天地

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title></title>
    <style>
        * {
      
      
            margin: 0;
            padding: 0;
        }
    </style>
</head>

<body>
    <canvas width="300" height="300"></canvas>
    <script>
        var myCanvas = document.querySelector('canvas');
        var ctx = myCanvas.getContext('2d');

        //正方体的边长
        var lineW = 200;
        //起始点横纵坐标
        var x = 0;
        var y = 100;

        //实线部分
        ctx.moveTo(x, y);
        ctx.lineTo(x, y + lineW);
        ctx.lineTo(x + lineW, y + lineW);
        ctx.lineTo(x + lineW, y);
        ctx.lineTo(x, y);
        ctx.lineTo(x + lineW / 2, y - lineW / 2);
        ctx.lineTo(x + lineW * 3 / 2, y - lineW / 2);
        ctx.lineTo(x + lineW * 3 / 2, y + lineW / 2);
        ctx.lineTo(x + lineW, y + lineW);
        ctx.lineTo(x + lineW, y);
        ctx.lineTo(x + lineW * 3 / 2, y - lineW / 2);
        ctx.lineTo(x + lineW, y);

        ctx.fillStyle = '#DD5353';
        ctx.fill();
        ctx.strokeStyle = "#333";
        ctx.stroke();

        //虚线部分
        ctx.beginPath();
        ctx.lineTo(x, y + lineW);
        ctx.lineTo(x + lineW / 2, y + lineW / 2);
        ctx.lineTo(x + lineW / 2, y - lineW / 2);
        ctx.lineTo(x + lineW / 2, y + lineW / 2);
        ctx.lineTo(x + lineW * 3 / 2, y + lineW / 2);
        ctx.setLineDash([5]);
        ctx.stroke();
    </script>
</body>

</html>
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