在 Three.js 中从 Base64 加载纹理 [英] Load textures from Base64 in Three.js
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问题描述
我目前正在从 URL 加载纹理，但由于我的后端代码正在生成行星，因此我需要使用 Base64 显示它们.
I am currently loading textures from URLs but since my back-end code is generating planets I need them to be displayed using Base64.
(我正在尝试程序生成，所以我不想保存图像然后通过 URL 加载它)
(I'm playing around with procedural generation so I'd prefer not to save the image and then load it via URL)
这是代码;
<!DOCTYPE html><html class=''>
<head>
<style>body {
background: black;
text-align: center;
}
</style></head><body>
<script id="vertexShader" type="x-shader/x-vertex">
uniform vec3 viewVector;
uniform float c;
uniform float p;
varying float intensity;
void main({
vec3 vNormal = normalize( normalMatrix * normal );
vec3 vNormel = normalize( normalMatrix * viewVector );
intensity = pow( c - dot(vNormal, vNormel), p );
gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
}
</script>
<script id="fragmentShader" type="x-shader/x-fragment">
uniform vec3 glowColor;
varying float intensity;
void main() {
vec3 glow = glowColor * intensity;
gl_FragColor = vec4( glow, 1.0 );
}
</script>
<script src='http://cdnjs.cloudflare.com/ajax/libs/three.js/r63/three.min.js'></script><script src='https://s3-us-west-2.amazonaws.com/s.cdpn.io/123941/orbitcontrols.js'></script>
<script>var container, controls, camera, renderer, scene, light,
rotationSpeed = 0.02,
clock = new THREE.Clock(),
WIDTH = window.innerWidth - 30,
HEIGHT = window.innerHeight - 30;
//cam vars
var angle = 45,
aspect = WIDTH / HEIGHT,
near = 0.1,
far = 10000;
//mesh vars
var earthMesh, Atmos, AtmosMat;
container = document.createElement('div');
document.body.appendChild(container);
//cam
camera = new THREE.PerspectiveCamera(angle, aspect, near, far);
camera.position.set(1380, -17, 394);
//scene
scene = new THREE.Scene();
camera.lookAt(scene.position);
//light
light = new THREE.SpotLight(0xFFFFFF, 1, 0, Math.PI / 2, 1);
light.position.set(4000, 4000, 1500);
light.target.position.set (1000, 3800, 1000);
light.castShadow = true;
//light.shadowCameraNear = 1;
//light.shadowCameraFar = 10000;
//light.shadowCameraFov = 50;
scene.add(light);
//EARTH
var earthGeo = new THREE.SphereGeometry (200, 400, 400),
earthMat = new THREE.MeshPhongMaterial();
earthMesh = new THREE.Mesh(earthGeo, earthMat);
earthMesh.position.set(-100, 0, 0);
earthMesh.rotation.y=5;
scene.add(earthMesh);
//diffuse
earthMat.map = THREE.ImageUtils.loadTexture('https://s3-us-west-2.amazonaws.com/s.cdpn.io/123941/earthmap.jpg');
//bump
earthMat.bumpMap = THREE.ImageUtils.loadTexture('https://s3-us-west-2.amazonaws.com/s.cdpn.io/123941/bump-map.jpg');
earthMat.bumpScale = 8;
//specular
earthMat.specularMap = THREE.ImageUtils.loadTexture('https://s3-us-west-2.amazonaws.com/s.cdpn.io/123941/earthspec1k.jpg');
earthMat.specular = new THREE.Color('#2e2e2e');
earthMesh.castShadow = true;
earthMesh.receiveShadow = true;
//Atmosphere
AtmosMat = new THREE.ShaderMaterial({
uniforms:{
"c": { type: "f", value: 0.3 },
"p": { type: "f", value: 5.2},
glowColor: { type: "c", value: new THREE.Color(0x00dbdb)},
viewVector: { type: "v3", value: camera.position}
},
vertexShader: document.getElementById('vertexShader').textContent,
fragmentShader: document.getElementById('fragmentShader').textContent,
side: THREE.BackSide,
blending: THREE.AdditiveBlending,
transparent: true
});
Atmos = new THREE.Mesh(earthGeo, AtmosMat);
Atmos.position = earthMesh.position;
Atmos.scale.multiplyScalar(1.2);
scene.add(Atmos);
//STARS
var starGeo = new THREE.SphereGeometry (3000, 10, 100),
starMat = new THREE.MeshBasicMaterial();
starMat.map = THREE.ImageUtils.loadTexture('https://s3-us-west-2.amazonaws.com/s.cdpn.io/123941/star-field.png');
starMat.side = THREE.BackSide;
var starMesh = new THREE.Mesh(starGeo, starMat);
scene.add(starMesh);
//renderer
renderer = new THREE.WebGLRenderer({antialiasing : true});
renderer.setSize(WIDTH, HEIGHT);
container.appendChild(renderer.domElement);
//controls
controls = new THREE.OrbitControls( camera, renderer.domElement);
controls.addEventListener( 'change', render );
function animate(){
requestAnimationFrame(animate);
controls.update();
render();
}
function render(){
var delta = clock.getDelta();
earthMesh.rotation.y += rotationSpeed * delta;
renderer.clear();
renderer.render(scene, camera);
}
animate();
//# sourceURL=pen.js
</script>
</body></html>
我试过了；
image = document.createElement( 'img' );
document.body.appendChild( image );
earthMat.map = new THREE.Texture( image );
image.addEventListener( 'load', function ( event ) { texture.needsUpdate = true; } );
image.src = 'data:image/png;base64,<?php echo $image_data_base64 ?>';
但它似乎无法正常工作.
But it doesn't seem to be working correctly.
非常感谢任何帮助，谢谢.
Any help would be greatly appreciated, thanks.
推荐答案
原来我不得不这样做；
earthMat.map = THREE.ImageUtils.loadTexture( image.src );
代替;
earthMat.map = new THREE.Texture( image );
新的事件监听器；
image.addEventListener( 'load', function ( event ) {
earthMat.map = THREE.ImageUtils.loadTexture( image.src );
earthMat.needsUpdate = true;
});
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