我在使用react-konva在两个Rectangle节点之间重新创建混合模式时遇到麻烦。到目前为止,我已经尝试过更改节点的渲染顺序,添加额外的组并将复合操作应用于这些操作,并将复合操作设置为onMount。
这是一个使用Konva和Vanilla js的工作示例:
https://codepen.io/jagomez8/pen/xQwdvq
var width = window.innerWidth;
var height = window.innerHeight;
var stage = new Konva.Stage({
container: 'container',
width: width,
height: height
});
var layer = new Konva.Layer();
var rect1 = new Konva.Rect({
x: 0,
y: 0,
width: 100,
height: 100,
fill: 'red',
});
layer.add(rect1);
var rect2 = new Konva.Rect({
x: 50,
y: 50,
width: 100,
height: 100,
fill: 'green',
globalCompositeOperation: 'destination-in'
});
layer.add(rect2);
stage.add(layer);
这是我为实现相同效果而努力的版本:
https://codepen.io/jagomez8/pen/qQOjWj
const {Layer, Rect, Stage, Group, Circle} = ReactKonva;
class TestGroup extends React.Component {
render() {
return (
<Group >
<Rect width={100} height={100} x={0} y={0} fill="red" />
<Rect
fill="green"
x={50} y={50}
width={100} height={100}
globalCompositeOperation='destination-in'
/>
</Group>
);
}
}
function App() {
return (
<Stage width={700} height={700}>
<Layer>
<TestGroup/>
</Layer>
</Stage>
);
}
ReactDOM.render(<App/>, document.getElementById('app'));
任何见识将不胜感激。谢谢!
答案 0 :(得分:0)
在第二个演示中,您使用的是React和konva的非常旧的版本。您只需要更新它们,演示就可以正常工作:
import React, { Component } from "react";
import Konva from "konva";
import { render } from "react-dom";
import { Stage, Layer, Rect } from "react-konva";
class App extends Component {
render() {
return (
<Stage width={window.innerWidth} height={window.innerHeight}>
<Layer>
<Rect width={100} height={100} x={0} y={0} fill="red" />
<Rect
fill="green"
x={50}
y={50}
width={100}
height={100}
globalCompositeOperation="destination-in"
/>
</Layer>
</Stage>
);
}
}
render(<App />, document.getElementById("root"));