var cubeGeo = new THREE.InstancedBufferGeometry().copy(new THREE.BoxBufferGeometry(10, 10, 10));
//cubeGeo.maxInstancedCount = 8;
cubeGeo.addAttribute("cubePos", new THREE.InstancedBufferAttribute(new Float32Array([
25, 25, 25,
25, 25, -25, -25, 25, 25, -25, 25, -25,
25, -25, 25,
25, -25, -25, -25, -25, 25, -25, -25, -25
]), 3, 1));
var vertexShader = [
"precision highp float;",
"",
"uniform mat4 modelViewMatrix;",
"uniform mat4 projectionMatrix;",
"",
"attribute vec3 position;",
"attribute vec3 cubePos;",
"",
"void main() {",
"",
" \t gl_Position = projectionMatrix * modelViewMatrix * vec4(cubePos + position, 1.0);",
"",
"}"
].join("\n");
var fragmentShader = [
"precision highp float;",
"",
"void main() {",
"",
" \t gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);",
"",
"}"
].join("\n");
var mat = new THREE.RawShaderMaterial({
uniforms: {},
vertexShader: vertexShader,
fragmentShader: fragmentShader,
side: THREE.DoubleSide,
transparent: false
});
var mesh = new THREE.Mesh(cubeGeo, mat);
scene.add(mesh);
html * {
padding: 0;
margin: 0;
width: 100%;
overflow: hidden;
}
#host {
width: 100%;
height: 100%;
}
<script src="https://threejs.org/build/three.js"></script>
<script src="https://threejs.org/examples/js/controls/TrackballControls.js"></script>
<script src="https://threejs.org/examples/js/libs/stats.min.js"></script>
<div id="host"></div>
<script>
var WIDTH = window.innerWidth,
HEIGHT = window.innerHeight,
FOV = 35,
NEAR = 1,
FAR = 1000;
var renderer = new THREE.WebGLRenderer({
antialias: true
});
renderer.setSize(WIDTH, HEIGHT);
document.getElementById('host').appendChild(renderer.domElement);
var stats = new Stats();
stats.domElement.style.position = 'absolute';
stats.domElement.style.top = '0';
document.body.appendChild(stats.domElement);
var camera = new THREE.PerspectiveCamera(FOV, WIDTH/HEIGHT, NEAR, FAR);
camera.position.z = 250;
var trackballControl = new THREE.TrackballControls(camera, renderer.domElement);
trackballControl.rotateSpeed = 5.0; // need to speed it up a little
var scene = new THREE.Scene();
var light = new THREE.PointLight(0xffffff, 1, Infinity);
camera.add(light);
scene.add(light);
function render() {
if (typeof updateVertices !== "undefined") {
updateVertices();
}
renderer.render(scene, camera);
stats.update();
}
function animate() {
requestAnimationFrame(animate);
trackballControl.update();
render();
}
animate();
</script>
可能感興趣http://alteredqualia.com/three/examples/webgl_cubes.html – gaitat
我讀這和搞糊塗了。什麼是替代即。沒有應用屬性「模型的所有200個頂點」?我認爲頂點是屬性。 「實例化10k ...」仍然只能保持具有200個頂點的屬性。渲染器會參考它10K次,不知道您的2000K號碼來自哪裏。 – pailhead
等等,即使在參與這樣的論壇時,3D也沒有獎勵。查看34次,沒有評論,沒有接受:( – pailhead