Rod*_*igo 4 javascript html5 canvas physics-engine
我正在尝试使用这个问题.物理库.我正在使用他们的"入门"教程,但它无法找到画布.
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."
我试图创建render.element和render.canvas,但我是盲目的.一个"让你开始的最小例子"应该已经有效了.我究竟做错了什么？
从部分演示中脱颖而出,我发现大多数代码应该在一个函数中,在页面加载中调用,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);
}