pixi.js引擎阿里小程序版(基于PixiJs v4.8.8版本)
使用方法
本模板主要使用Pixi引擎作为基础,实现手淘Canvas绘制,我们对Pixi原有4.8.8引擎进行了改写,实现了对Canvas的兼容。项目开发非常接近web Pixi。
引擎包:
@tbminiapp/pixi-miniprogram-engine
开发IDE:
阿里小程序IDE:https://miniapp.open.taobao.com/docV3.htm?docId=117780&docType=1
注意:
- 目前Canvas要求手淘版本 > 9.7.0,项目中需要进行判断版本,进行降级抄底
- Canvas 2d: 要求手淘版本 > 9.7.0
- webGL : 要求手淘版本 > 9.9.0
- 目前小程序IDE只支持”真机调试“和“预览”方式进行项目debug和预览,为保证构建速度,建议使用1.13.4版本以上IDE
- 小程序IDE模拟器中暂时无法预览和调试
使用方式:
配置流程,启用Canvas -> 页面Canvas组件 ->侦听Canvas组件onReady事件->my._createCanvas ->成功回调后,设置canvas尺寸->使用PIXI.miniprogram.registerCanvas将Canvas注册给pixi->实例化PIXI.Application(注意options中forceCanvas强制使用2d上下文,resolution为当前设备像素密度)->侦听Canvas的onTouchStart\onTouchEnd\onTouchMove 事件通过onTouchHandle侦听
1.开启使用Canvas:
app.json 增加配置项:"enableSkia": "true"
{
"pages": [
"pages/test/index"
],
"window": {
"defaultTitle": "My App",
"enableSkia": "true"
}
}
2.安装@tbminiapp/pixi-miniprogram-engine依赖,以及pixi的type描述依赖
2.1:npm包安装
npm install @tbminiapp/pixi-miniprogram-engine --by=yarn
npm install @types/pixi.js@4.7.5 --by=yarn
#### 3.为Canvas节点 增加onReady事件监听 (type依然可以保持webgl 不受影响),onTouchStart\onTouchEnd\onTouchMove 事件通过onTouchHandle侦听(onTouchHandle在下方js中有实现)
```javascript
<canvas id="canvas" type="webgl" onReady="onCanvasReady" class="canvas" onTouchStart="onTouchHandle" onTouchMove="onTouchHandle" onTouchEnd="onTouchHandle"></canvas>
4.在js中编写canvas的 onReady事件侦听函数 onCanvasReady
import * as PIXI from "@tbminiapp/pixi-miniprogram-engine";
const { registerCanvas, devicePixelRatio } = PIXI.miniprogram;
Page({
pixiCanvas:null,
onCanvasReady() {
my._createCanvas({
id: "canvas",
success: (canvas) => {
const systemInfo = my.getSystemInfoSync();
const dpr = systemInfo.pixelRatio;
const windowWidth = systemInfo.windowWidth;
const windowHeight = systemInfo.windowHeight;
canvas.width = windowWidth * dpr;
canvas.height = windowHeight * dpr;
this.pixiCanvas = canvas;
registerCanvas(canvas);
const size = {
width: canvas.width / devicePixelRatio,
height: canvas.height / devicePixelRatio,
};
const contextType = '2d';
const forceCanvas = contextType === '2d' ? true : false;
const context = canvas.getContext(contextType);
const application = new PIXI.Application({
width: size.width,
height: size.height,
view: canvas,
context: context,
transparent: true,
forceCanvas: forceCanvas,
resolution: devicePixelRatio,
});
},
});
},
onTouchHandle(event) {
if (this.pixiCanvas && event.changedTouches && event.changedTouches.length) {
this.pixiCanvas.dispatchEvent(event);
}
}
});