在我的网站上，我尝试使用three.js创建失真悬停效果（例如此演示https://tympanus.net/Development/DistortionHoverEffect/）
除图像纵横比外，其他一切都很好。我不使用容器的固定尺寸吗？图片无法拉伸。
我的问题是如何在TextureLoader()中设置图像长宽比？
var loader = new THREE.TextureLoader();
loader.crossOrigin = "";
var texture1 = loader.load(image1);
var texture2 = loader.load(image2);
var disp = loader.load(dispImage);
我的代码在这个小提琴中（我不知道为什么我的代码不能在小提琴上工作） https://jsfiddle.net/42835mvL
寻求帮助。
HTML
<body>
<div class="item">
<div class="img-disp">
<img src="https://images.pexels.com/photos/67636/rose-blue-flower-rose-blooms-67636.jpeg?auto=compress&cs=tinysrgb&dpr=1&w=500">
<img src="https://images.pexels.com/photos/66997/pexels-photo-66997.jpeg?auto=compress&cs=tinysrgb&dpr=1&w=500">
</div>
</div>
</body>
CSS
body {
display:block;
width:100%;
height:100%;
}
.item {
padding:2em;
width:50%;
position:relative;
}
.img-disp {
display:block;
height:100%;
width:100%;
overflow:hidden;
}
.img-disp img {
display:block;
height:auto;
width:auto;
min-height:100%;
min-width:100%;
}
.img-disp :nth-child(2) img {
display:none;
position:absolute;
top:0;
left:0;
opacity:0;
transition:opacity 0.3s;
}
JS
var hoverEffect = function(opts) {
var vertex = `
varying vec2 vUv;
void main() {
vUv = uv;
gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
}
`;
var fragment = `
varying vec2 vUv;
uniform sampler2D texture;
uniform sampler2D texture2;
uniform sampler2D disp;
uniform float dispFactor;
uniform float effectFactor;
void main() {
vec2 uv = vUv;
vec4 disp = texture2D(disp, uv);
vec2 distortedPosition = vec2(uv.x + dispFactor * (disp.r*effectFactor), uv.y);
vec2 distortedPosition2 = vec2(uv.x - (1.0 - dispFactor) * (disp.r*effectFactor), uv.y);
vec4 _texture = texture2D(texture, distortedPosition);
vec4 _texture2 = texture2D(texture2, distortedPosition2);
vec4 finalTexture = mix(_texture, _texture2, dispFactor);
gl_FragColor = finalTexture;
}
`;
var parent = opts.parent || console.warn("no parent");
var dispImage = opts.displacementImage || console.warn("displacement image missing");
var image1 = opts.image1 || console.warn("first image missing");
var image2 = opts.image2 || console.warn("second image missing");
var intensity = opts.intensity || -0.65;
var speedIn = opts.speedIn || 1.2;
var speedOut = opts.speedOut || 1.2;
var userHover = (opts.hover === undefined) ? true : opts.hover;
var easing = '';
var mobileAndTabletcheck = function() {
var check = false;
(function(a){if(/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino|android|ipad|playbook|silk/i.test(a)||/1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(a.substr(0,4))) check = true;})(navigator.userAgent||navigator.vendor||window.opera);
return check;
};
var scene = new THREE.Scene();
var camera = new THREE.OrthographicCamera(
parent.offsetWidth / -2,
parent.offsetWidth / 2,
parent.offsetHeight / 2,
parent.offsetHeight / -2,
1,1000);
camera.position.z = 1;
var renderer = new THREE.WebGLRenderer({
antialias: false
});
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setClearColor(0xffffff, 0.0);
renderer.setSize(parent.offsetWidth, parent.offsetHeight);
parent.appendChild(renderer.domElement);
var loader = new THREE.TextureLoader();
loader.crossOrigin = "";
var mesh1;
var texture1 = loader.load(image1);
var texture2 = loader.load(image2);
var disp = loader.load(dispImage);
disp.wrapS = disp.wrapT = THREE.RepeatWrapping;
texture1.magFilter = texture2.magFilter = THREE.LinearFilter;
texture1.minFilter = texture2.minFilter = THREE.LinearFilter;
texture1.anisotropy = renderer.getMaxAnisotropy();
texture2.anisotropy = renderer.getMaxAnisotropy();
var mat = new THREE.ShaderMaterial({
uniforms: {
effectFactor: { type: "f", value: intensity },
dispFactor: { type: "f", value: 0.0 },
texture: { type: "t", value: texture1 },
texture2: { type: "t", value: texture2 },
disp: { type: "t", value: disp }
},
vertexShader: vertex,
fragmentShader: fragment,
transparent: true,
opacity: 1.0
});
var geometry = new THREE.PlaneBufferGeometry(parent.offsetWidth,parent.offsetHeight,1);
var object = new THREE.Mesh(geometry, mat);
scene.add(object);
var addEvents = function(){
var evtIn = "mouseenter";
var evtOut = "mouseleave";
if (mobileAndTabletcheck()) {
evtIn = "touchstart";
evtOut = "touchend";
}
parent.addEventListener(evtIn, function(e) {
TweenMax.to(mat.uniforms.dispFactor, speedIn, {
value: 1,
ease: easing
});
});
parent.addEventListener(evtOut, function(e) {
TweenMax.to(mat.uniforms.dispFactor, speedOut, {
value: 0,
ease: easing
});
});
};
if (userHover) {
addEvents();
}
window.addEventListener("resize", function(e) {
renderer.setSize(parent.offsetWidth, parent.offsetHeight);
});
this.next = function(){
TweenMax.to(mat.uniforms.dispFactor, speedIn, {
value: 1,
ease: easing
});
}
this.previous = function(){
TweenMax.to(mat.uniforms.dispFactor, speedOut, {
value: 0,
ease: easing
});
};
var animate = function() {
requestAnimationFrame(animate);
renderer.render(scene, camera);
};
animate();
};
Array.from(document.querySelectorAll('.img-disp')).forEach((el) => {
const imgs = Array.from(el.querySelectorAll('img'));
new hoverEffect({
parent: el,
intensity: el.dataset.intensity || undefined,
speedIn: el.dataset.speedin || undefined,
speedOut: el.dataset.speedout || undefined,
easing: el.dataset.easing || undefined,
hover: el.dataset.hover || undefined,
image1: imgs[0].getAttribute('src'),
image2: imgs[1].getAttribute('src'),
displacementImage:'https://tympanus.net/Development/DistortionHoverEffect/img/displacement/8.jpg'
});
});