我在上面的评论中有一个我在谈论的样本:http: //jsfiddle.net/KwQBB/
这不需要一个新层,但这样做可能是一个好习惯。
您可以将逻辑定制为您想要的任何东西,尤其是模拟“剪切”
var stage = new Kinetic.Stage({
container: 'container',
width: 578,
height: 500
});
var layer = new Kinetic.Layer();
var pentagon = new Kinetic.RegularPolygon({
x: stage.getWidth() / 2,
y: stage.getHeight() / 2,
sides: 5,
radius: 70,
fill: 'red',
stroke: 'black',
strokeWidth: 4,
draggable: true,
dragOnTop: false
});
var rect1 = new Kinetic.Rect({ // overlay
x: 0,
y: 0,
width: stage.getWidth(),
height: 100,
fill: 'gray',
opacity: 0.5,
listening: false // <------ Extremely important
});
var rect2 = new Kinetic.Rect({ // overlay
x: 0,
y: stage.getHeight()/2,
width: stage.getWidth(),
height: 100,
fill: 'gray',
opacity: 0.5,
listening: false // <------ Extremely important
});
// add the shape to the layer
layer.add(pentagon);
layer.add(rect1);
layer.add(rect2); // add more rectangles to complete overlay
// add the layer to the stage
stage.add(layer);