20/07/18 10:23:44 Z+cMIoZ7.net
>>68
HTML5,JavaScript
＜canvas id="cv" width="360" height="360"></canvas＞
＜script>
var ctx = document.getElementById("cv").getContext("2d");
ctx.lineWidth = 5; //線の太さ
ctx.strokeStyle = "red";
ctx.beginPath();
var r=10;var x0=0,y0=0;
for(i=0;i<=360;i+=5){
var d = i*Math.PI/180;
x0= r*(16*Math.sin(d)*Math.sin(d)*Math.sin(d));
y0= r*(13*Math.cos(d)-5*Math.cos(2*d)-2*Math.cos(3*d)-Math.cos(4*d));
ctx.lineTo(w+x0,h-y0);
}
ctx.stroke();
</script＞
URLﾘﾝｸ(i.imgur.com)