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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>optimize</title>
<style>
#fps {
color: red;
}
</style>
</head>
<body>
<canvas id="canvas"></canvas>
<br>
fps: <span id="fps">0</span>
<br>
<!-- 展示渲染方式 -->
<p class='render-type'>非离屏渲染</p>
<!-- 展示在离屏方式下是否多实例 -->
<span class="is-instance"></span>
<!-- 控制数量 -->
<br>
粒子数量：<input type="range" max="9999" min="100" step="100" value="1000" oninput="changeAmount()">
<span class="amount">1000</span>
<br>
<button onclick="changeRender()">修改渲染方式</button>
<button onclick="toggleMultInstance()">离屏渲染单/多实例</button>
<script src="js/particle.js"></script>
<script>
let canvas = document.getElementById('canvas');
let particle = new Scene(canvas);
// 修改粒子个数
function changeAmount() {
let amount = document.getElementsByClassName('amount')[0];
let value = event.target.value;
amount.innerHTML = value;
particle.updateAmount(value);
}
let renderTypeDom = document.getElementsByClassName('render-type')[0];
let instanceDom = document.getElementsByClassName('is-instance')[0];
// 修改渲染方式
function changeRender() {
if(renderTypeDom.innerHTML == "非离屏渲染") {
renderTypeDom.innerHTML = "离屏渲染";
particle.useMultInstance == true ? instanceDom.innerHTML = "多实例" : instanceDom.innerHTML = "单实例"
} else {
renderTypeDom.innerHTML = "非离屏渲染";
instanceDom.innerHTML = "";
}
particle.toggleRender();
}
// 切换单/多实例
function toggleMultInstance() {
let canToggle = particle.toggleMultInstance();
if (canToggle) {
particle.useMultInstance == true ? instanceDom.innerHTML = "多实例" : instanceDom.innerHTML = "单实例";
} else {
instanceDom.innerHTML = "";
}
}
</script>
</body>
</html>