我正在尝试使用 matter.js physics library .我正在使用他们的 "getting started" tutorial , 但找不到 Canvas 。
这是我的 html:
<html>
<head>
<meta charset="UTF-8">
<title>Physics test</title>
</head>
<script type="text/javascript" src="./lib/matter-0.8.0.js"></script>
<script type="text/javascript">
// Matter.js module aliases
var Engine = Matter.Engine,
World = Matter.World,
Bodies = Matter.Bodies;
// create a Matter.js engine
var engine = Engine.create(document.body);
// create two boxes and a ground
var boxA = Bodies.rectangle(400, 200, 80, 80);
var boxB = Bodies.rectangle(450, 50, 80, 80);
var ground = Bodies.rectangle(400, 610, 810, 60, { isStatic: true });
// add all of the bodies to the world
World.add(engine.world, [boxA, boxB, ground]);
// run the engine
Engine.run(engine);
</script>
<body>
</body>
</html>
控制台显示以下错误:
" [Matter] warn: No "render.element" passed, "render.canvas" was not inserted into document."
我尝试创建 render.element 和 render.canvas,但我在盲目行动。一个“让你入门的最小例子”应该已经在工作了。我做错了什么?
最佳答案
逐个演示,我发现大部分代码应该在一个函数中,在页面加载时调用,例如:
<body onload='Start()'>
和
function Start() {
// create a Matter.js engine
var engine = Engine.create(document.getElementById('canvas-container'));
// create two boxes and a ground
var boxA = Bodies.rectangle(400, 200, 80, 80);
var boxB = Bodies.rectangle(450, 50, 80, 80);
var ground = Bodies.rectangle(400, 610, 810, 60, { isStatic: true });
// add all of the bodies to the world
World.add(engine.world, [boxA, boxB, ground]);
// run the engine
Engine.run(engine);
}
关于javascript - 如何使 matter.js 的最小示例工作?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/28079138/