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我試圖獲得一個基本的渲染目標，在渲染到1場景的地方工作，然後將其用作渲染四邊形的紋理。我有一個基本的演示，但是當我運行它時，結果都是像素化的，就好像它被渲染到一個小屏幕上，然後在四邊形上展開。三JS像素渲染目標？
這裏是我的代碼：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<title></title>
<link rel="stylesheet" type="text/css" href="style.css">
<script src="three.min.js" type="text/javascript"></script>
<style>
body {
color: #ffffff;
font-family:Monospace;
font-size:13px;
text-align:center;
font-weight: bold;
background-color: #000000;
margin: 0px;
overflow: hidden;
}
#info {
position: absolute;
top: 0px; width: 100%;
padding: 5px;
}
a {
color: #ffffff;
}
</style>
</head>
<body>
<div id="container"></div>
<script id="vertex-shader-test" type="x-shader/x-vertex">
void main() {
gl_Position = projectionMatrix * viewMatrix * modelMatrix * vec4(position, 1.0);
}
</script>
<script id="fragment-shader-test" type="x-shader/x-vertex">
void main() {
gl_FragColor = vec4(1,1,1,1);
}
</script>
<script id="vertex-shader-screen" type="x-shader/x-vertex">
varying vec2 vertexUV;
void main() {
vertexUV = uv;
gl_Position = projectionMatrix * modelViewMatrix * vec4(position, 1.0);
}
</script>
<script id="fragment-shader-screen" type="x-shader/x-fragment">
precision highp float;
varying vec2 vertexUV;
uniform sampler2D rtTexture;
void main() {
gl_FragColor = texture2D(rtTexture, vertexUV);
}
</script>
<script>
var scene = null,
rtScene = null,
camera = null,
cameraRTT = null,
renderer = null,
plane = null;
var rtTexture;
init();
render();
function init()
{
container = document.getElementById('container');
scene = new THREE.Scene();
rtScene = new THREE.Scene();
rtTexture = new THREE.WebGLRenderTarget(window.innerWidth, window.innerHeight, { minFilter: THREE.LinearFilter, magFilter: THREE.NearestFilter, format: THREE.RGBFormat });
camera = new THREE.PerspectiveCamera(20, window.innerWidth/window.innerHeight, 1, 1000);
camera.position.z = 1;
rtCamera = new THREE.PerspectiveCamera(45, window.innerWidth/window.innerHeight, 1, 1000);
rtCamera.position.z = 100;
rtCamera.position.y = 10;
var material2 = new THREE.ShaderMaterial({
vertexShader: document.getElementById('vertex-shader-test').textContent,
fragmentShader: document.getElementById('fragment-shader-test').textContent,
});
var geometry = new THREE.PlaneBufferGeometry(100, 100, 200, 200);
plane = new THREE.Mesh(geometry, material2);
plane.rotateX(-Math.PI/2);
rtScene.add(plane);
var geometry = new THREE.PlaneBufferGeometry(1, 1);
var material = new THREE.ShaderMaterial({
uniforms: {
rtTexture: { type: "t", value: rtTexture }
},
vertexShader: document.getElementById('vertex-shader-screen').textContent,
fragmentShader: document.getElementById('fragment-shader-screen').textContent,
});
var mesh = new THREE.Mesh(geometry, material);
scene.add(mesh);
renderer = new THREE.WebGLRenderer();
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.autoClear = false;
container.appendChild(renderer.domElement);
}
function render() {
requestAnimationFrame(render);
camera.lookAt(new THREE.Vector3(0,0,0));
rtCamera.lookAt(new THREE.Vector3(0,0,0));
renderer.render(rtScene, rtCamera, rtTexture, true);
renderer.render(scene, camera);
}
</script>
</body>
</html>
任何想法？