canvas 로 곡선 그리기



html)

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<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" 
          content="width=device-width, height=device-height, 
                     minimum-scale=1.0, maximum-scale=1.0, initial-scale=1.0">
    <title>Insert title here</title>
    <script type="text/javascript">
    window.onload = function(){
        var canvas = document.getElementById("canvas");
        if(canvas.getContext){
            var draw = canvas.getContext("2d");
            
            //조절점이 1개
            draw.beginPath();
            draw.moveTo(50,50);
            //quadraticCurveTo(조절점x, 조절점y, 선의 끝점x, 선의 끝점y)
            draw.quadraticCurveTo(15020025050);
            draw.lineWidth = 10;
            draw.strokeStyle = "green";
            draw.stroke();
            
            
            //조절점이 2개
            draw.beginPath();
            draw.moveTo(50,200);
            //bezierCurveTo(조절점1x, 조절점1y, 조절점2x, 조절점2y, 선의 끝점x, 선의 끝점y)
            draw.bezierCurveTo(100,300200,100250,200);
            draw.lineWidth = 10;
            draw.strokeStyle = "blue";
            draw.stroke();
        }
    }
    </script>
</head>
 
<body>
    <canvas id="canvas" width="300px" height="400px"></canvas>
</body>
</html>
cs



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