This (fiddle)不優雅,可以提高了很多,但它的作品。它使用非常簡單的碰撞模型和間隔計時器。你需要調整一些部分(你會希望改進它)。
HTML:
<div class="gravity" style="width: 90px; height: 15px; background-color: red; position: absolute; top: 10px; left: 20px;"></div>
<div class="gravity" style="width: 90px; height: 25px; background-color: green; position: absolute; top: 60px; left: 30px;"></div>
<div class="gravity" style="width: 90px; height: 25px; background-color: gray; position: absolute; top: 30px; right: 45px;"></div>
<div class="obstacle" style="width: 230px; height: 40px; background-color: blue; position: absolute; top: 240px; right: 19px;"></div>
<div class="obstacle" style="width: 180px; height: 40px; background-color: blue; position: absolute; top: 90px; left: 30px;"></div>
的JavaScript:
(function() {
// All falling objects
var gravity = $('.gravity'),
// All static objects
obstacle = $('.obstacle');
var all = gravity.add(obstacle);
setInterval(function() {
// Calculate positions of all falling objects
gravity.each(function() {
var e = this,
g = $(this),
ypos = g.offset().top,
xpos = g.offset().left,
h = g.height(),
w = g.width();
// Check whether something is in our way
var conflicts = false;
all.each(function() {
if(this === e) return;
var a = $(this);
if(xpos < a.offset().left + a.width() && xpos + w > a.offset().left) {
if(ypos + h > a.offset().top && ypos + h < a.offset().top + a.height()) {
conflicts = true;
}
}
});
if(!conflicts) {
// Move down (real gravitation would be v = a * t)
g.css('top', g.offset().top + 3);
}
});
}, 50);
})();
爲了防止負面評論和這樣的東西:是的,你應該再調用這個文件已加載。是的,這段代碼很髒,不應該在生產環境中使用。這正是它聲稱的 - 一個工作的例子。