- 2021.1.11 修复graphics在新版微信内不正常显示的bug
- 2021.1.14 改写PIXI.Text和PIXI.Graphics的渲染逻辑，需要在wxml文件中添加两个type 2d的canvas，然后把canvas传入PIXI中。其中一个用于Graphics渲染，一个用于Text渲染，传入参数示例：PIXI = createPIXI(canvas,stageWidth,canvas2d,canvas2dText)
- 2021.3.25 添加遮罩实现示例
- 2021.3.29 添加performance的判断
- 2021.5.11 修改animate库不能显示的问题
- 2021.12.09 使用微信小程序新版本的获取离屏canvas接口获取2d离屏canvas，减少创建PIXI时候额外传入的两个canvas，该版本需要微信小程序基础库2.16.1以上。如果要兼容旧版本的基础库，请使用v1.0版本代码。
可参考 example 目录下的示例项目或参照以下流程：
-
复制dist目录的pixi.miniprogram.js到目录libs下
-
导入小程序适配版本的 pixi.js
import {createPIXI} from "../../libs/pixi.miniprogram"
var unsafeEval = require("../../libs/unsafeEval")
var installSpine = require("../../libs/pixi-spine")
var installAnimate = require("../../libs/pixi-animate")
var myTween = require("../../libs/myTween")
var PIXI = {};
var app = getApp()
Page({
onLoad:function () {
var info = wx.getSystemInfoSync();
var sw = info.screenWidth;//获取屏幕宽高
var sh = info.screenHeight;//获取屏幕宽高
var tw = 750;
var th = parseInt(tw*sh/sw);//计算canvas实际高度
var stageWidth = tw;
var stageHeight = th;
var query = wx.createSelectorQuery();
query.select('#myCanvas').node().exec((res) => {
var canvas = res[0].node;
canvas.width = sw;//设置canvas实际宽高
canvas.height = sh;//设置canvas实际宽高,从而实现全屏
PIXI = createPIXI(canvas,stageWidth);//传入canvas，传入canvas宽度，用于计算触摸坐标比例适配触摸位置
unsafeEval(PIXI);//适配PIXI里面使用的eval函数
installSpine(PIXI);//注入Spine库
installAnimate(PIXI);//注入Animate库
var renderer = PIXI.autoDetectRenderer({width:stageWidth, height:stageHeight,'transparent':false,premultipliedAlpha:true,'view':canvas});//通过view把小程序的canvas传入
var stage = new PIXI.Container();
var bg = PIXI.Sprite.from("img/bg.jpg");
stage.addChild(bg);
bg.interactive=true;
bg.on("touchstart",function(e){
console.log("touchstart",e.data.global)
});
bg.on("pointerup",function(e){
console.log("touchend")
});
//小程序不支持加载本地fnt，json文件，所以涉及到fnt，json文件的加载需要放到网络服务器
PIXI.Loader.shared
.add("https://raw.githubusercontent.com/skyfish-qc/imgres/master/blog.fnt")
.add("https://raw.githubusercontent.com/skyfish-qc/imgres/master/mc.json")
.add('spineboypro', "https://raw.githubusercontent.com/skyfish-qc/imgres/master/spineboy-pro.json").load(function(loader, res){
var btext = new PIXI.BitmapText('score:1234',{'font':{'name':'blog','size':'60px'},'tint':0xffff00});
btext.x = 40;
btext.y = 140;
stage.addChild(btext);
var explosionTextures = [];
for (var i = 0; i < 26; i++) {
var texture = PIXI.Texture.from('pic'+(i+1)+'.png');
explosionTextures.push(texture);
}
for (i = 0; i < 2; i++) {
var explosion = new PIXI.AnimatedSprite(explosionTextures);
explosion.x = Math.random() * stageWidth;
explosion.y = Math.random() * stageHeight*0.2;
explosion.anchor.set(0.5);
explosion.rotation = Math.random() * Math.PI;
explosion.scale.set(0.75 + Math.random() * 0.5);
explosion.gotoAndPlay(Math.random() * 27);
stage.addChild(explosion);
}
var spineBoyPro = new PIXI.spine.Spine(res.spineboypro.spineData);
spineBoyPro.x = stageWidth / 2;
spineBoyPro.y = 1200;
spineBoyPro.scale.set(0.5);
spineBoyPro.state.setAnimation(0, "hoverboard",true);
stage.addChild(spineBoyPro);
//测试Animate
var mymc = new PIXI.animate.MovieClip();
stage.addChild(mymc);
const testTxt = new PIXI.Text("test",{fill:'#ff0000',fontSize:44});
testTxt.x = 100;
testTxt.y = 400;
stage.addChild(testTxt);
const testTxt2 = new PIXI.Text("",{fill:'#ff0000',fontSize:44});
testTxt2.x = 100;
testTxt2.y = 500;
stage.addChild(testTxt2);
testTxt2.text = "test2";
const graphics = new PIXI.Graphics();
graphics.beginFill(0xFF3300);
graphics.drawRect(0, 0, 100, 100);
graphics.endFill();
graphics.x = 100;
graphics.y = 200;
stage.addChild(graphics);
const graphics2 = new PIXI.Graphics();
graphics2.beginFill(0xFFFF00);
graphics2.drawRect(0, 0, 200, 200);
graphics2.endFill();
graphics2.x = 200;
graphics2.y = 400;
stage.addChild(graphics2);
//遮罩示例start
//遮罩示意shader
var frag = `
varying vec2 vTextureCoord;
uniform vec4 inputPixel;
uniform vec2 dimensions;
uniform sampler2D uSampler;
uniform sampler2D masktex;
void main(void) {
vec4 color = texture2D(uSampler, vTextureCoord);
vec2 coord = vTextureCoord.xy * inputPixel.xy / dimensions.xy;
vec4 maskcolor = texture2D(masktex, coord);
gl_FragColor = color*maskcolor;
}
`;
const maskshape = new PIXI.Graphics();
maskshape.beginFill(0xFFFFFF);//用于遮罩的形状必须为白色，因为shader遮罩原理是目标颜色乘以遮罩形状颜色，设置成白色可以避免干扰目标颜色。
maskshape.drawCircle(100, 100, 100);
maskshape.endFill();
maskshape.x = 200;
maskshape.y = 600;
stage.addChild(maskshape);//先加入渲染
var masktex = renderer.generateTexture(maskshape);//获取到遮罩形状纹理，如果是直接加载外部遮罩图片，上面部分可以省略。
stage.removeChild(maskshape);//获得纹理后移除
var uniform = {
masktex:masktex,
dimensions: [200, 200]//传入遮罩纹理图片尺寸，用于计算纹理的实际uv
}
var shader = new PIXI.Filter(null,frag,uniform);
graphics2.filters = [shader];//给graphics2物体进行遮罩，原来是方形的经过遮罩后变成圆形
//遮罩示例end
renderer.render(stage);
});
//myTween缓动库使用示例
/*
缓动公式：Linear,Quad,Cubic,Quart,Sine,Expo,Circ,Elastic,Back,Bounce,Quint
比如myTween.Quad.Out,myTween.Quad.In,myTween.Quad.InOut
onEnd:结束事件
onUpdate:每帧触发
myTween.clean();//清除所有事件
*/
var tweenObj = PIXI.Sprite.from("img/head.png");
tweenObj.y = 500;
stage.addChild(tweenObj);
var tx = 600;
function tweenMove() {
myTween.to(tweenObj,1,{x:tx,ease:myTween.Quad.Out,onEnd:function(){
if(tx>0) {
tx = 0;
} else {
tx = 600;
}
tweenMove();
}});
}
tweenMove();
function animate() {
canvas.requestAnimationFrame(animate);
renderer.render(stage);
myTween.update();
}
animate();
// renderer.render(stage);
});
},
touchEvent:function(e){
//接收小程序的触摸事件传给PIXI
PIXI.dispatchEvent(e);
}
})- 本项目当前使用的 pixi.js 版本号为 5.2.1。
- 该适配版本的 PIXI 不在全局环境中，如使用 pixi.js 的其他配套类库，需要自行传入 PIXI 到类库中。可参考libs里面的pixi-spine的做法。
- 改写PIXI.Text和PIXI.Graphics的渲染逻辑，以适配小程序的显示。
- 视频不支持