今天我一直在尝试用 three.js 构建我的第一个天空盒。我已经阅读了很多教程,我最终得到的代码是基于这个: http: //learningthreejs.com/blog/2011/08/15/lets-do-a-sky/ 我确实做了进行了一些更改,以允许首先加载图像,并使其与我正在使用的 three.js 版本兼容。
我已经克服了很多小问题来达到我目前的水平,但是尽管进行了相当艰苦的搜索,但仍然找不到我当前问题的任何答案。我的问题是,尽管使用了从互联网下载的专用天空盒纹理,但很明显我的天空盒是一个有角和边的立方体。纹理看起来严重扭曲,完全没有说服力。
这是我的天空盒外观的屏幕截图:
这是我下载图像的站点的链接: http://www.humus.name/index.php?page=Cubemap&item=Yokohama3 正如你所看到的,在他们的预览中看起来好多了。
我已经用几个不同的下载纹理尝试了这个,每次都很明显你正在看一个立方体的内部。
这是我的代码(我包括我的所有代码,而不仅仅是创建天空盒的部分):
var scene;
var camera;
var renderer;
function createRenderer () {
renderer = new THREE.WebGLRenderer();
renderer.setClearColor(0x000000, 1.0)
renderer.setSize(window.innerWidth, window.innerHeight)
renderer.shadowMapEnabled = true;
//renderer.shadowCameraNear = 0.5;
//renderer.shadowCameraFar = 500;
}
function createCamera () {
camera = new THREE.PerspectiveCamera(
45,
window.innerWidth/window.innerHeight,
0.1, 1000
);
camera.position.x = 50;
camera.position.y = 30;
camera.position.z = 40;
camera.lookAt(scene.position);
}
function createPlane () {
var material = new THREE.MeshLambertMaterial({
color: 0xcccccc,
})
var geometry = new THREE.PlaneGeometry(40, 40)
var plane = new THREE.Mesh(geometry, material)
plane.receiveShadow = true;
plane.rotation.x = -Math.PI/2
plane.position.y = -6;
scene.add(plane)
}
function createLight () {
var spotLight = new THREE.DirectionalLight(0xffffff);
spotLight.position.set( 0, 50, 20 );
spotLight.shadowCameraVisible = true;
spotLight.shadowDarkness = 0.5
spotLight.shadowCameraNear = 0;
spotLight.shadowCameraFar = 100;
spotLight.shadowCameraLeft = -50;
spotLight.shadowCameraRight = 50;
spotLight.shadowCameraTop = 50;
spotLight.shadowCameraBottom = -50;
spotLight.castShadow = true;
scene.add(spotLight);
}
function createSkyboxAndSphere () {
var urlPrefix = "Yokohama3/";
var urls = [ urlPrefix + "posx.jpg", urlPrefix + "negx.jpg",
urlPrefix + "posy.jpg", urlPrefix + "negy.jpg",
urlPrefix + "posz.jpg", urlPrefix + "negz.jpg" ];
var textureCube = THREE.ImageUtils.loadTextureCube( urls , undefined, function () {;
var shader = THREE.ShaderLib["cube"];
var uniforms = THREE.UniformsUtils.clone( shader.uniforms );
shader.uniforms['tCube'].value = textureCube; // textureCube has been init before
var material = new THREE.ShaderMaterial({
fragmentShader : shader.fragmentShader,
vertexShader : shader.vertexShader,
uniforms : shader.uniforms,
depthWrite : false,
side: THREE.BackSide,
});
var geometry = new THREE.BoxGeometry(100, 100, 100)
var skybox = new THREE.Mesh(geometry, material)
scene.add(skybox)
var material = new THREE.MeshPhongMaterial({
color: "red",
envMap: textureCube,
reflectivity: 0.3,
})
var geometry = new THREE.SphereGeometry(6, 30, 15)
var sphere = new THREE.Mesh(geometry, material)
sphere.castShadow = true;
sphere.receiveShadow = true;
scene.add(sphere)
});
}
function init () {
scene = new THREE.Scene();
createRenderer();
createCamera();
createLight();
createPlane ();
createSkyboxAndSphere ();
document.getElementById("container").appendChild(renderer.domElement)
render ()
}
function render () {
renderer.render(scene, camera)
requestAnimationFrame(render);
}
window.onload = function () {
init ();
}
我怀疑我从根本上误解了立方体贴图和天空盒如何工作的一些东西——我对这个特别是对这个和一般的 javascript 非常陌生,并且我意识到我的知识存在巨大差距。
如果这个问题的答案很明显和/或之前已经提出过这个问题,我深表歉意,并先发制人地感谢您的帮助!