HTML5是一種用于創(chuàng)建和呈現(xiàn)網(wǎng)頁內(nèi)容的語言,它有很多神奇的功能。其中一個令人驚嘆的功能就是可以使用HTML5制作玫瑰花綻放的代碼!
<canvas id="myCanvas"></canvas> <script type="text/javascript"> var canvas = document.getElementById("myCanvas"); var ctx = canvas.getContext("2d"); var x = canvas.width / 2; var y = canvas.height / 2; var radius = 75; var startAngle = 0; var endAngle = 2 * Math.PI; function drawRose() { ctx.clearRect(0, 0, canvas.width, canvas.height); ctx.beginPath(); ctx.moveTo(x, y); for (var i = 0; i < 2 * Math.PI; i += 0.01) { var a = 1 / 5; var b = 1 - a; var r = radius * Math.sin(a * i) * Math.cos(b * i); var newX = x + r * Math.cos(i); var newY = y - r * Math.sin(i); ctx.lineTo(newX, newY); } ctx.fillStyle = "#ff9dbd"; ctx.shadowColor = "#000000"; ctx.shadowBlur = 8; ctx.shadowOffsetX = 0; ctx.shadowOffsetY = 0; ctx.fill(); } setInterval(function () { if (radius < 800) { radius += 5; drawRose(); } }, 10); </script>
使用canvas元素和JavaScript代碼,HTML5可以呈現(xiàn)出美麗的玫瑰花綻放效果。此代碼使用了一個函數(shù)來繪制花瓣,并使用setInterval函數(shù)來控制花朵的擴大速度。嘗試將此代碼復制到您的編程編輯器中,并查看HTML5的魔力!