我试图将三个圆圈逐渐淡入后移动到页面的左上角,以便它们在一个方框上重叠。目前,我设置了一个超时,但它只适用于第一个圆圈,并且运动非常快。如何将它们作为一个整体移动并减慢运动?
<!DOCTYPE HTML>
<html>
<head>
<style>
body {
margin: 0px;
padding: 0px;
background-color: #CCCCCC;
}
</style>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"></head>
<body>
<div id="container"></div>
<script src="http://www.html5canvastutorials.com/libraries/kinetic-v4.3.1-beta2.js">
</script>
<script>
var fadeIn = function(shape) {
var o = shape.getOpacity();
o = o + 0.05 >=0.5 ? 0.5 : o + 0.05;
shape.setOpacity(o);
shape.getLayer().draw();
if(o !== 0.4) {
setTimeout(function() {
fadeIn(shape).delay(3000*3);
}, 720);
}
};
var stage = new Kinetic.Stage({
container: 'container',
width: 800,
height: 700
//width: 578,
//height: 200
});
var layer = new Kinetic.Layer();
var circle = new Kinetic.Circle({
x: stage.getWidth() / 2,
y: stage.getHeight() / 2,
radius: 70,
fill: '#CCCCCC',
stroke: 'yellow',
strokeWidth: 8,
opacity: 0.1
});
circle.hide();
setTimeout(function() {
circle.show();
fadeIn(circle).delay(3000*3);
}, 1720);
layer.add(circle);
var circle2 = new Kinetic.Circle({
x: stage.getWidth() / 2.1,
y: stage.getHeight() / 2.1,
radius: 70,
fill: '#CCCCCC',
stroke: 'yellow',
strokeWidth: 8,
opacity: 0.1
});
circle2.hide();
setTimeout(function() {
circle2.show();
fadeIn(circle2).delay(3000*3);
}, 5600);
// add the shape to the layer
layer.add(circle2);
var circle3 = new Kinetic.Circle({
x: stage.getWidth() / 2.2,
y: stage.getHeight() / 2.2,
radius: 70,
fill: '#CCCCCC',
stroke: 'yellow',
strokeWidth: 8,
opacity: 0.1
});
circle3.hide();
setTimeout(function() {
circle3.show();
fadeIn(circle3).delay(3000*3);
}, 12000);
// add the shape to the layer
layer.add(circle3);
// var boxGroup = new Kinetic.Group({
//x: 10,
//y: 10,
//draggable: true
//});
var boxGroup = new Kinetic.Group({
x: -250,
y: -250,
draggable: true
});
var box = new Kinetic.Rect({
x: 10,
y: 10,
width: 100,
height: 100,
fill: '#CCCCCC',
stroke: 'black'
});
boxGroup.add(box);
layer.add(box);
layer.add(boxGroup);
// add the layer to the stage
stage.add(layer);
setTimeout(function() {
circle.moveTo(boxGroup).delay(5000*3);
circle2.moveTo(boxGroup).delay(5000*3);
circle3.moveTo(boxGroup).delay(5000*3);
}, 24000);
</script>
</body>
答案 0 :(得分:0)
KineticJS有一个很棒的transitionTo()函数可以调用。它可以为任何数字属性设置动画,例如位置或不透明度。我创建了一个小提琴来展示这一点,因为setTimeout是一个古老的功能,与现在使用RequestAnimationFrame的浏览器相比(现在所有主流浏览器都实现了这一点,KineticJS像大多数其他库一样有内置的后备功能)
我清理了一些代码,删除了评论并添加了一个额外的圈子,以获得乐趣。
但你真正需要的只是:
myShape.transitionTo({shape configuration, duration});
例如:
circle.transitionTo({
x: box.getX(), //coordinates to transition to
y: box.getY(),
opacity: 1,
duration: 1 // length of time for this animation in seconds, REQUIRED for animation to work
});