动态调整 pixi 阶段及其内容 window resize and window load

Question

我正在尝试在 window 调整大小时动态调整 pixi 阶段（canvas 和内容）的大小。并且还让它最初以浏览器 window 的大小加载，而不改变比率。

我正在使用以下内容将初始大小基本上设置为 window.innerWidth & window.innerHeight。

但它做了一些奇怪的事情，它以较小的尺寸加载（但不是 html 中指定的 canvas 的尺寸），然后扩展以适应 window。

var w;
var h;
    
window.onload = function() {
    var w = window.innerWidth;
    var h = window.innerHeight;

    //this part resizes the canvas but keeps ratio the same
    renderer.view.style.width = w + "px";
    renderer.view.style.height = h + "px"

//  init();
};

这是我的 onresize 函数 - 它正在调整 canvas 的大小，但不是内容。

我以为它正在更新 renderer.view，它会调整内容的大小，但它并没有这样做。

如何调整 stage/renderer.view 内容的大小？

window.onresize = function (event){
    var w = window.innerWidth;
    var h = window.innerHeight;

    //this part resizes the canvas but keeps ratio the same
    renderer.view.style.width = w + "px";
    renderer.view.style.height = h + "px";

    //this part adjusts the ratio:
    renderer.resize(w,h);
}

    // create an new instance of a pixi stage
    var stage = new PIXI.Stage(0xff00ff);
    var renderer = PIXI.autoDetectRenderer(window.innerWidth, window.innerHeight);

    // add the renderer view element to the DOM
   var mypixiStage = document.body.appendChild(renderer.view);

Answer 1

您需要设置大小和比例，供调整大小事件函数参考。然后，您需要一个调整大小函数来检查 window 大小，以便在调整大小时保持比例。我也在运行手动调整大小功能以启动初始页面加载。

此外，请注意我不是运行 renderer.resize。我只是调整绘图区域的大小。

这里有一个fiddle给你看看：http://jsfiddle.net/2wjw043f/

这是 fiddle 代码：

var size = [1920, 1080];
var ratio = size[0] / size[1];
var stage = new PIXI.Stage(0x333333, true);
var renderer = PIXI.autoDetectRenderer(size[0], size[1], null);
document.body.appendChild(renderer.view);
var texture = new PIXI.RenderTexture();
r1 = new PIXI.Graphics();
r1.beginFill(0x00ffff);
r1.drawRect(0, 0, 100, 100);
r1.endFill();
texture.render(r1);
var block = new PIXI.Sprite(texture);
block.position.x = 100;
block.position.y = 100;
block.anchor.x = .5;
block.anchor.y = .5;
stage.addChild(block);
requestAnimFrame(animate);
resize();
function animate() {
    requestAnimFrame(animate);
    block.rotation += .01;
    renderer.render(stage);
}
function resize() {
    if (window.innerWidth / window.innerHeight >= ratio) {
        var w = window.innerHeight * ratio;
        var h = window.innerHeight;
    } else {
        var w = window.innerWidth;
        var h = window.innerWidth / ratio;
    }
    renderer.view.style.width = w + 'px';
    renderer.view.style.height = h + 'px';
}
window.onresize = resize;

Answer 2

我已经使用 Pixi.js 几个星期了，并解决了调整 canvas 大小的相同问题。此 class 创建了一个精灵，该精灵具有完成大部分工作的方法 "applyResize"。 canvas 背景的大小将与构造函数中的父级 "domElement" 相同。你必须在初始化后给精灵添加 'resize' 事件监听器。或者您可以做其他事情来改进它。

class PixiBackground {

    constructor(type = 'cover', domElement, imgUrl) {
        this.domElement = domElement;
        this.imgUrl = imgUrl;
        this.parent = new PIXI.Container();
        this.sprite = new PIXI.Sprite.fromImage(this.imgUrl);
        this.parent.addChild(this.sprite);
        this.type = type;
    }

    addTo(container) {
        container.addChild(this.parent);
        this.applyResize();
    }

    applyResize() {
        const domSize = {
            x: this.domElement.clientWidth,
            y: this.domElement.clientHeight
        };
        const imageSize = {
            x: this.sprite.texture.width,
            y: this.sprite.texture.height
        };
        const domElementRatio = domSize.x / domSize.y;
        const imageRatio = imageSize.x / imageSize.y;
        var scale = 1;
        var position = new PIXI.Point(0, 0);

        if (this.type == 'cover' ? domElementRatio > imageRatio : domElementRatio < imageRatio) {
            //photo is taller than background
            scale = domSize.x / imageSize.x;
            position.y = -(imageSize.y * scale - domSize.y) / 2;
            position.x = 0;
        } else {
            //photo is wider than background
            scale = domSize.y / imageSize.y;
            position.x = -(imageSize.x * scale - domSize.x) / 2;
            position.y = 0;
        }
        this.sprite.scale = new PIXI.Point(scale, scale);
        this.sprite.position = position;
        return this;
    }
}

const imgUrl = 'https://images.unsplash.com/photo-1528723624453-3e53a413b392?ixlib=rb-0.3.5&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ&s=b44ae61a30e1a05f5defbf48cb5956eb';
const canvasParentElement = document.getElementById('canvasParentElement');
const renderer = PIXI.autoDetectRenderer({
    width: canvasParentElement.clientWidth,
    height: canvasParentElement.clientHeight
});
canvasParentElement.appendChild(renderer.view);

const stage = new PIXI.Container();
const pixiTestObject = new PixiBackground('cover', canvasParentElement, imgUrl);

PIXI.loader.add(imgUrl).load(function() {
    pixiTestObject.addTo(stage)
    requestAnimationFrame(animate);

    function animate() {
        requestAnimationFrame(animate);
        renderer.render(stage);
    }
});

window.addEventListener('resize', debounce(() => onResizeWindow(), 250));
window.addEventListener('resize', debounce(() => pixiTestObject.applyResize(), 250));

// From underscrore.js
function debounce(func, wait, immediate) {
    let timeout;
    return function() {
        let args = arguments;
        let later = () => {
            timeout = null;
            if (!immediate) func.apply(this, args);
        };
        let callNow = immediate && !timeout;
        clearTimeout(timeout);
        timeout = setTimeout(later, wait);
        if (callNow) func.apply(this, args);
    }
}

function onResizeWindow() {
    const canvas = renderer.view;
    const w = canvasParentElement.clientWidth;
    const h = canvasParentElement.clientHeight;
    canvas.style.width = w + 'px';
    canvas.style.height = h + 'px';
    canvas.width = w;
    canvas.height = h;
    renderer.resize(w, h);
}

  #canvasParentElement {
    background: black;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
  }

<script src="https://cdnjs.cloudflare.com/ajax/libs/pixi.js/4.8.1/pixi.min.js"></script>
<div id="canvasParentElement"></div>

Answer 3

从 PixiJS 5.0 开始，您可以简单地使用应用程序的 resizeTo 属性：

let app = new PIXI.Application({ resizeTo: window });

文档：http://pixijs.download/release/docs/PIXI.Application.html#Application

Answer 4

adaptive-scale 对于调整大小和缩放事物非常有用

Answer 5

app.renderer.resize(window.innerWidth, window.innerHeight);
window.onresize = function()
{
    app.renderer.resize(window.innerWidth, window.innerHeight);
}

Answer 6

对于我的用例，我只需要根据精灵的宽度缩放精灵。我使用 scale 函数并将其限制为最大值 1:

sprite.scale.set(Math.min(app.screen.width / sprite.texture.width, 1))

从 PixiJS 5.3.0 开始，渲染器上会发出一个 resize 事件。这要感谢 Fabian von Ellerts 在他的评论中提到的 issue #6081 打开。

app.renderer.on('resize', (width, height) => {
  sprite.scale.set(Math.min(width / sprite.texture.width, 1))
})

⚠️ 这只会设置精灵的尺寸。您仍然需要以类似的方式将其定位在 canvas 上，即也缩放其位置。

动态调整 pixi 阶段及其内容 window resize and window load

Dynamically resize the pixi stage and it's contents on window resize and window load

javascript

jquery

canvas

pixi.js