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antimatter15 commited on Sep 11, 2023

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.gitattributes +1 -0
.gitignore +2 -0
index.html +180 -0
main.js +1176 -0

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1	+ *.{ply,splat} filter=lfs diff=lfs merge=lfs -text

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1	+ .DS_Store
2	+

index.html ADDED Viewed

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+<!DOCTYPE html>
+<html lang="en" dir="ltr">
+	<head>
+		<title>WebGL Gaussian Splat Viewer</title>
+		<meta charset="utf-8" />
+		<meta
+			name="viewport"
+			content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"
+		/>
+		<meta name="apple-mobile-web-app-capable" content="yes" />
+		<meta
+			name="apple-mobile-web-app-status-bar-style"
+			content="black-translucent"
+		/>
+		<style>
+			body {
+				overflow: hidden;
+				margin: 0;
+				height: 100vh;
+				width: 100vw;
+				touch-action: none;
+				font-family: sans-serif;
+				background: black;
+    			text-shadow: 0 0 3px black;
+			}
+			a, body {
+				color: white;
+			}
+			#info {
+				z-index: 100;
+				position: absolute;
+				top: 10px;
+				left: 10px;
+			}
+			h3 {
+				margin: 5px 0;
+			}
+			p {
+				margin: 5px 0;
+				font-size: small;
+			}
+			.cube-wrapper {
+				transform-style: preserve-3d;
+			}
+			.cube {
+				transform-style: preserve-3d;
+				transform: rotateX(45deg) rotateZ(45deg);
+				animation: rotation 2s infinite;
+			}
+			.cube-faces {
+				transform-style: preserve-3d;
+				height: 80px;
+				width: 80px;
+				position: relative;
+				transform-origin: 0 0;
+				transform: translateX(0) translateY(0) translateZ(-40px);
+			}
+			.cube-face {
+				position: absolute;
+				inset: 0;
+				background: #0017ff;
+				border: solid 1px #ffffff;
+			}
+			.cube-face.top {
+				transform: translateZ(80px);
+			}
+			.cube-face.front {
+				transform-origin: 0 50%;
+				transform: rotateY(-90deg);
+			}
+			.cube-face.back {
+				transform-origin: 0 50%;
+				transform: rotateY(-90deg) translateZ(-80px);
+			}
+			.cube-face.right {
+				transform-origin: 50% 0;
+				transform: rotateX(-90deg) translateY(-80px);
+			}
+			.cube-face.left {
+				transform-origin: 50% 0;
+				transform: rotateX(-90deg) translateY(-80px) translateZ(80px);
+			}
+			@keyframes rotation {
+				0% {
+					transform: rotateX(45deg) rotateY(0) rotateZ(45deg);
+					animation-timing-function: cubic-bezier(
+						0.17,
+						0.84,
+						0.44,
+						1
+					);
+				}
+				50% {
+					transform: rotateX(45deg) rotateY(0) rotateZ(225deg);
+					animation-timing-function: cubic-bezier(
+						0.76,
+						0.05,
+						0.86,
+						0.06
+					);
+				}
+				100% {
+					transform: rotateX(45deg) rotateY(0) rotateZ(405deg);
+					animation-timing-function: cubic-bezier(
+						0.17,
+						0.84,
+						0.44,
+						1
+					);
+				}
+			}
+			.scene,
+			#message {
+				position: absolute;
+				display: flex;
+				top: 0;
+				right: 0;
+				left: 0;
+				bottom: 0;
+				z-index: 2;
+				height: 100%;
+				width: 100%;
+				align-items: center;
+				justify-content: center;
+			}
+			#message {
+				font-weight: bold;
+				font-size: large;
+				color: red;
+			}
+			#progress {
+				position: absolute;
+				top: 0;
+				height: 5px;
+				background: blue;
+				z-index: 99;
+				transition: width 0.1s ease-in-out;
+			}
+		</style>
+	</head>
+	<body>
+		<div id="info">
+			<h3>WebGL 3D Gaussian Splat Viewer</h3>
+			<p>Use mouse or arrow keys to navigate.</p>
+			<small>
+				By <a href="https://twitter.com/antimatter15">Kevin Kwok</a>.
+				Code on
+				<a href="https://github.com/antimatter15/splat">Github</a
+				>.
+			</small>
+		</div>
+		<div id="progress"></div>
+		<div id="message"></div>
+		<div class="scene" id="spinner">
+			<div class="cube-wrapper">
+				<div class="cube">
+					<div class="cube-faces">
+						<div class="cube-face bottom"></div>
+						<div class="cube-face top"></div>
+						<div class="cube-face left"></div>
+						<div class="cube-face right"></div>
+						<div class="cube-face back"></div>
+						<div class="cube-face front"></div>
+					</div>
+				</div>
+			</div>
+		</div>
+		<script src="main.js"></script>
+	</body>
+</html>

main.js ADDED Viewed

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+let cameras = [
+	{
+		id: 0,
+		img_name: "00001",
+		width: 1959,
+		height: 1090,
+		position: [
+			-3.0089893469241797, -0.11086489695181866, -3.7527640949141428,
+		],
+		rotation: [
+			[0.876134201218856, 0.06925962026449776, 0.47706599800804744],
+			[-0.04747421839895102, 0.9972110940209488, -0.057586739349882114],
+			[-0.4797239414934443, 0.027805376500959853, 0.8769787916452908],
+		],
+		fy: 1164.6601287484507,
+		fx: 1159.5880733038064,
+	},
+	{
+		id: 1,
+		img_name: "00009",
+		width: 1959,
+		height: 1090,
+		position: [
+			-2.5199776022057296, -0.09704735754873686, -3.6247725540304545,
+		],
+		rotation: [
+			[0.9982731285632193, -0.011928707708098955, -0.05751927260507243],
+			[0.0065061360949636325, 0.9955928229282383, -0.09355533724430458],
+			[0.058381769258182864, 0.09301955098900708, 0.9939511719154457],
+		],
+		fy: 1164.6601287484507,
+		fx: 1159.5880733038064,
+	},
+	{
+		id: 2,
+		img_name: "00017",
+		width: 1959,
+		height: 1090,
+		position: [
+			-0.7737533667465242, -0.3364271945329695, -2.9358969417573753,
+		],
+		rotation: [
+			[0.9998813418672372, 0.013742375651625236, -0.0069605529394208224],
+			[-0.014268370388586709, 0.996512943252834, -0.08220929105659476],
+			[0.00580653013657589, 0.08229885200307129, 0.9965907801935302],
+		],
+		fy: 1164.6601287484507,
+		fx: 1159.5880733038064,
+	},
+	{
+		id: 3,
+		img_name: "00025",
+		width: 1959,
+		height: 1090,
+		position: [
+			1.2198221749590001, -0.2196687861401182, -2.3183162007028453,
+		],
+		rotation: [
+			[0.9208648867765482, 0.0012010625395201253, 0.389880004297208],
+			[-0.06298204172269357, 0.987319521752825, 0.14571693239364383],
+			[-0.3847611242348369, -0.1587410451475895, 0.9092635249821667],
+		],
+		fy: 1164.6601287484507,
+		fx: 1159.5880733038064,
+	},
+	{
+		id: 4,
+		img_name: "00033",
+		width: 1959,
+		height: 1090,
+		position: [
+			1.742387858893817, -0.13848225198886954, -2.0566370113193146,
+		],
+		rotation: [
+			[0.24669889292141334, -0.08370189346592856, -0.9654706879349405],
+			[0.11343747891376445, 0.9919082664242816, -0.05700815184573074],
+			[0.9624300466054861, -0.09545671285663988, 0.2541976029815521],
+		],
+		fy: 1164.6601287484507,
+		fx: 1159.5880733038064,
+	},
+	{
+		id: 5,
+		img_name: "00041",
+		width: 1959,
+		height: 1090,
+		position: [
+			3.6567309419223935, -0.16470990600750707, -1.3458085590422042,
+		],
+		rotation: [
+			[0.2341293058324528, -0.02968330457755884, -0.9717522161434825],
+			[0.10270823606832301, 0.99469554638321, -0.005638106875665722],
+			[0.9667649592295676, -0.09848690996657204, 0.2359360976431732],
+		],
+		fy: 1164.6601287484507,
+		fx: 1159.5880733038064,
+	},
+	{
+		id: 6,
+		img_name: "00049",
+		width: 1959,
+		height: 1090,
+		position: [
+			3.9013554243203497, -0.2597500978038105, -0.8106154188297828,
+		],
+		rotation: [
+			[0.6717235545638952, -0.015718162115524837, -0.7406351366386528],
+			[0.055627354673906296, 0.9980224478387622, 0.029270992841185218],
+			[0.7387104058127439, -0.060861588786650656, 0.6712695459756353],
+		],
+		fy: 1164.6601287484507,
+		fx: 1159.5880733038064,
+	},
+	{
+		id: 7,
+		img_name: "00057",
+		width: 1959,
+		height: 1090,
+		position: [4.742994605467533, -0.05591660945412069, 0.9500365976084458],
+		rotation: [
+			[-0.17042655709210375, 0.01207080756938, -0.9852964448542146],
+			[0.1165090336695526, 0.9931575292530063, -0.00798543433078162],
+			[0.9784581921120181, -0.1161568667478904, -0.1706667764862097],
+		],
+		fy: 1164.6601287484507,
+		fx: 1159.5880733038064,
+	},
+	{
+		id: 8,
+		img_name: "00065",
+		width: 1959,
+		height: 1090,
+		position: [4.34676307626522, 0.08168160516967145, 1.0876221470355405],
+		rotation: [
+			[-0.003575447631888379, -0.044792503246552894, -0.9989899137764799],
+			[0.10770152645126597, 0.9931680875192705, -0.04491693593046672],
+			[0.9941768441149182, -0.10775333677534978, 0.0012732004866391048],
+		],
+		fy: 1164.6601287484507,
+		fx: 1159.5880733038064,
+	},
+	{
+		id: 9,
+		img_name: "00073",
+		width: 1959,
+		height: 1090,
+		position: [3.264984351114202, 0.078974937336732, 1.0117200284114904],
+		rotation: [
+			[-0.026919994628162257, -0.1565891128261527, -0.9872968974090509],
+			[0.08444552208239385, 0.983768234577625, -0.1583319754069128],
+			[0.9960643893290491, -0.0876350978794554, -0.013259786205163005],
+		],
+		fy: 1164.6601287484507,
+		fx: 1159.5880733038064,
+	},
+];
+const camera = cameras[0];
+function getProjectionMatrix(fx, fy, width, height) {
+	const znear = 0.2;
+	const zfar = 200;
+	return [
+		[(2 * fx) / width, 0, 0, 0],
+		[0, (2 * fy) / height, 0, 0],
+		[0, 0, zfar / (zfar - znear), 1],
+		[0, 0, -(zfar * znear) / (zfar - znear), 0],
+	].flat();
+}
+function getViewMatrix(camera) {
+	const R = camera.rotation.flat();
+	const t = camera.position;
+	const camToWorld = [
+		[R[0], R[1], R[2], 0],
+		[R[3], R[4], R[5], 0],
+		[R[6], R[7], R[8], 0],
+		[
+			-t[0] * R[0] - t[1] * R[3] - t[2] * R[6],
+			-t[0] * R[1] - t[1] * R[4] - t[2] * R[7],
+			-t[0] * R[2] - t[1] * R[5] - t[2] * R[8],
+			1,
+		],
+	].flat();
+	return camToWorld;
+}
+function multiply4(a, b) {
+	return [
+		b[0] * a[0] + b[1] * a[4] + b[2] * a[8] + b[3] * a[12],
+		b[0] * a[1] + b[1] * a[5] + b[2] * a[9] + b[3] * a[13],
+		b[0] * a[2] + b[1] * a[6] + b[2] * a[10] + b[3] * a[14],
+		b[0] * a[3] + b[1] * a[7] + b[2] * a[11] + b[3] * a[15],
+		b[4] * a[0] + b[5] * a[4] + b[6] * a[8] + b[7] * a[12],
+		b[4] * a[1] + b[5] * a[5] + b[6] * a[9] + b[7] * a[13],
+		b[4] * a[2] + b[5] * a[6] + b[6] * a[10] + b[7] * a[14],
+		b[4] * a[3] + b[5] * a[7] + b[6] * a[11] + b[7] * a[15],
+		b[8] * a[0] + b[9] * a[4] + b[10] * a[8] + b[11] * a[12],
+		b[8] * a[1] + b[9] * a[5] + b[10] * a[9] + b[11] * a[13],
+		b[8] * a[2] + b[9] * a[6] + b[10] * a[10] + b[11] * a[14],
+		b[8] * a[3] + b[9] * a[7] + b[10] * a[11] + b[11] * a[15],
+		b[12] * a[0] + b[13] * a[4] + b[14] * a[8] + b[15] * a[12],
+		b[12] * a[1] + b[13] * a[5] + b[14] * a[9] + b[15] * a[13],
+		b[12] * a[2] + b[13] * a[6] + b[14] * a[10] + b[15] * a[14],
+		b[12] * a[3] + b[13] * a[7] + b[14] * a[11] + b[15] * a[15],
+	];
+}
+function invert4(a) {
+	let b00 = a[0] * a[5] - a[1] * a[4];
+	let b01 = a[0] * a[6] - a[2] * a[4];
+	let b02 = a[0] * a[7] - a[3] * a[4];
+	let b03 = a[1] * a[6] - a[2] * a[5];
+	let b04 = a[1] * a[7] - a[3] * a[5];
+	let b05 = a[2] * a[7] - a[3] * a[6];
+	let b06 = a[8] * a[13] - a[9] * a[12];
+	let b07 = a[8] * a[14] - a[10] * a[12];
+	let b08 = a[8] * a[15] - a[11] * a[12];
+	let b09 = a[9] * a[14] - a[10] * a[13];
+	let b10 = a[9] * a[15] - a[11] * a[13];
+	let b11 = a[10] * a[15] - a[11] * a[14];
+	let det =
+		b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06;
+	if (!det) return null;
+	return [
+		(a[5] * b11 - a[6] * b10 + a[7] * b09) / det,
+		(a[2] * b10 - a[1] * b11 - a[3] * b09) / det,
+		(a[13] * b05 - a[14] * b04 + a[15] * b03) / det,
+		(a[10] * b04 - a[9] * b05 - a[11] * b03) / det,
+		(a[6] * b08 - a[4] * b11 - a[7] * b07) / det,
+		(a[0] * b11 - a[2] * b08 + a[3] * b07) / det,
+		(a[14] * b02 - a[12] * b05 - a[15] * b01) / det,
+		(a[8] * b05 - a[10] * b02 + a[11] * b01) / det,
+		(a[4] * b10 - a[5] * b08 + a[7] * b06) / det,
+		(a[1] * b08 - a[0] * b10 - a[3] * b06) / det,
+		(a[12] * b04 - a[13] * b02 + a[15] * b00) / det,
+		(a[9] * b02 - a[8] * b04 - a[11] * b00) / det,
+		(a[5] * b07 - a[4] * b09 - a[6] * b06) / det,
+		(a[0] * b09 - a[1] * b07 + a[2] * b06) / det,
+		(a[13] * b01 - a[12] * b03 - a[14] * b00) / det,
+		(a[8] * b03 - a[9] * b01 + a[10] * b00) / det,
+	];
+}
+function rotate4(a, rad, x, y, z) {
+	let len = Math.hypot(x, y, z);
+	x /= len;
+	y /= len;
+	z /= len;
+	let s = Math.sin(rad);
+	let c = Math.cos(rad);
+	let t = 1 - c;
+	let b00 = x * x * t + c;
+	let b01 = y * x * t + z * s;
+	let b02 = z * x * t - y * s;
+	let b10 = x * y * t - z * s;
+	let b11 = y * y * t + c;
+	let b12 = z * y * t + x * s;
+	let b20 = x * z * t + y * s;
+	let b21 = y * z * t - x * s;
+	let b22 = z * z * t + c;
+	return [
+		a[0] * b00 + a[4] * b01 + a[8] * b02,
+		a[1] * b00 + a[5] * b01 + a[9] * b02,
+		a[2] * b00 + a[6] * b01 + a[10] * b02,
+		a[3] * b00 + a[7] * b01 + a[11] * b02,
+		a[0] * b10 + a[4] * b11 + a[8] * b12,
+		a[1] * b10 + a[5] * b11 + a[9] * b12,
+		a[2] * b10 + a[6] * b11 + a[10] * b12,
+		a[3] * b10 + a[7] * b11 + a[11] * b12,
+		a[0] * b20 + a[4] * b21 + a[8] * b22,
+		a[1] * b20 + a[5] * b21 + a[9] * b22,
+		a[2] * b20 + a[6] * b21 + a[10] * b22,
+		a[3] * b20 + a[7] * b21 + a[11] * b22,
+		...a.slice(12, 16),
+	];
+}
+function translate4(a, x, y, z) {
+	return [
+		...a.slice(0, 12),
+		a[0] * x + a[4] * y + a[8] * z + a[12],
+		a[1] * x + a[5] * y + a[9] * z + a[13],
+		a[2] * x + a[6] * y + a[10] * z + a[14],
+		a[3] * x + a[7] * y + a[11] * z + a[15],
+	];
+}
+function createWorker(self) {
+	let buffer;
+	let vertexCount = 0;
+	let viewProj;
+	// 6*4 + 4 + 4 = 8*4
+	// XYZ - Position (Float32)
+	// XYZ - Scale (Float32)
+	// RGBA - colors (uint8)
+	// IJKL - quaternion/rot (uint8)
+	const rowLength = 3 * 4 + 3 * 4 + 4 + 4;
+	const runSort = (viewProj) => {
+		if (!buffer) return;
+		// console.time("sort");
+		const f_buffer = new Float32Array(buffer);
+		const u_buffer = new Uint8Array(buffer);
+		const depthList = new Float32Array(vertexCount);
+		const depthIndex = new Uint32Array(vertexCount);
+		for (let j = 0; j < vertexCount; j++) {
+			// For some reason dividing by wumbo actually causes
+			// problems, so this is the unnormalized camera space homo
+			depthList[j] =
+				viewProj[2] * f_buffer[8 * j + 0] +
+				viewProj[6] * f_buffer[8 * j + 1] +
+				viewProj[10] * f_buffer[8 * j + 2];
+			depthIndex[j] = j;
+		}
+		depthIndex.sort((a, b) => depthList[a] - depthList[b]);
+		const quat = new Float32Array(4 * vertexCount);
+		const scale = new Float32Array(3 * vertexCount);
+		const center = new Float32Array(3 * vertexCount);
+		const color = new Float32Array(4 * vertexCount);
+		for (let j = 0; j < vertexCount; j++) {
+			const i = depthIndex[j];
+			quat[4 * j + 0] = (u_buffer[32 * i + 28 + 0] - 128) / 128;
+			quat[4 * j + 1] = (u_buffer[32 * i + 28 + 1] - 128) / 128;
+			quat[4 * j + 2] = (u_buffer[32 * i + 28 + 2] - 128) / 128;
+			quat[4 * j + 3] = (u_buffer[32 * i + 28 + 3] - 128) / 128;
+			center[3 * j + 0] = f_buffer[8 * i + 0];
+			center[3 * j + 1] = f_buffer[8 * i + 1];
+			center[3 * j + 2] = f_buffer[8 * i + 2];
+			color[4 * j + 0] = u_buffer[32 * i + 24 + 0] / 255;
+			color[4 * j + 1] = u_buffer[32 * i + 24 + 1] / 255;
+			color[4 * j + 2] = u_buffer[32 * i + 24 + 2] / 255;
+			color[4 * j + 3] = u_buffer[32 * i + 24 + 3] / 255;
+			scale[3 * j + 0] = f_buffer[8 * i + 3 + 0];
+			scale[3 * j + 1] = f_buffer[8 * i + 3 + 1];
+			scale[3 * j + 2] = f_buffer[8 * i + 3 + 2];
+		}
+		self.postMessage({ quat, center, color, scale }, [
+			quat.buffer,
+			center.buffer,
+			color.buffer,
+			scale.buffer,
+		]);
+		// console.timeEnd("sort");
+	};
+	function processPlyBuffer(inputBuffer) {
+		const ubuf = new Uint8Array(inputBuffer);
+		// 10KB ought to be enough for a header...
+		const header = new TextDecoder().decode(ubuf.slice(0, 1024 * 10));
+		const header_end = "end_header\n";
+		const header_end_index = header.indexOf(header_end);
+		if (header_end_index < 0)
+			throw new Error("Unable to read .ply file header");
+		const vertexCount = parseInt(/element vertex (\d+)\n/.exec(header)[1]);
+		console.log("Vertex Count", vertexCount);
+		let row_offset = 0,
+			offsets = {},
+			types = {};
+		const TYPE_MAP = {
+			double: "getFloat64",
+			int: "getInt32",
+			uint: "getUint32",
+			float: "getFloat32",
+			short: "getInt16",
+			ushort: "getUint16",
+			uchar: "getUint8",
+		};
+		for (let prop of header
+			.slice(0, header_end_index)
+			.split("\n")
+			.filter((k) => k.startsWith("property "))) {
+			const [p, type, name] = prop.split(" ");
+			const arrayType = TYPE_MAP[type] || "getInt8";
+			types[name] = arrayType;
+			offsets[name] = row_offset;
+			row_offset += parseInt(arrayType.replace(/[^\d]/g, "")) / 8;
+		}
+		console.log("Bytes per row", row_offset, types, offsets);
+		let dataView = new DataView(
+			inputBuffer,
+			header_end_index + header_end.length,
+		);
+		let row = 0;
+		const attrs = new Proxy(
+			{},
+			{
+				get(target, prop) {
+					if (!types[prop]) throw new Error(prop + " not found");
+					return dataView[types[prop]](
+						row * row_offset + offsets[prop],
+						true,
+					);
+				},
+			},
+		);
+		console.time("calculate importance");
+		let sizeList = new Float32Array(vertexCount);
+		let sizeIndex = new Uint32Array(vertexCount);
+		for (row = 0; row < vertexCount; row++) {
+			sizeIndex[row] = row;
+			if (!types["scale_0"]) continue;
+			const size =
+				Math.exp(attrs.scale_0) *
+				Math.exp(attrs.scale_1) *
+				Math.exp(attrs.scale_2);
+			const opacity = 1 / (1 + Math.exp(-attrs.opacity));
+			sizeList[row] = size * opacity;
+		}
+		console.timeEnd("calculate importance");
+		console.time("sort");
+		sizeIndex.sort((b, a) => sizeList[a] - sizeList[b]);
+		console.timeEnd("sort");
+		// 6*4 + 4 + 4 = 8*4
+		// XYZ - Position (Float32)
+		// XYZ - Scale (Float32)
+		// RGBA - colors (uint8)
+		// IJKL - quaternion/rot (uint8)
+		const rowLength = 3 * 4 + 3 * 4 + 4 + 4;
+		const buffer = new ArrayBuffer(rowLength * vertexCount);
+		console.time("build buffer");
+		for (let j = 0; j < vertexCount; j++) {
+			row = sizeIndex[j];
+			const position = new Float32Array(buffer, j * rowLength, 3);
+			const scales = new Float32Array(buffer, j * rowLength + 4 * 3, 3);
+			const rgba = new Uint8ClampedArray(
+				buffer,
+				j * rowLength + 4 * 3 + 4 * 3,
+				4,
+			);
+			const rot = new Uint8ClampedArray(
+				buffer,
+				j * rowLength + 4 * 3 + 4 * 3 + 4,
+				4,
+			);
+			if (types["scale_0"]) {
+				const qlen = Math.sqrt(
+					attrs.rot_0 ** 2 +
+						attrs.rot_1 ** 2 +
+						attrs.rot_2 ** 2 +
+						attrs.rot_3 ** 2,
+				);
+				rot[0] = (attrs.rot_0 / qlen) * 128 + 128;
+				rot[1] = (attrs.rot_1 / qlen) * 128 + 128;
+				rot[2] = (attrs.rot_2 / qlen) * 128 + 128;
+				rot[3] = (attrs.rot_3 / qlen) * 128 + 128;
+				scales[0] = Math.exp(attrs.scale_0);
+				scales[1] = Math.exp(attrs.scale_1);
+				scales[2] = Math.exp(attrs.scale_2);
+			} else {
+				scales[0] = 0.01;
+				scales[1] = 0.01;
+				scales[2] = 0.01;
+				rot[0] = 255;
+				rot[1] = 0;
+				rot[2] = 0;
+				rot[3] = 0;
+			}
+			position[0] = attrs.x;
+			position[1] = attrs.y;
+			position[2] = attrs.z;
+			if (types["f_dc_0"]) {
+				// rgba[0] = (1 / (1 + Math.exp(-attrs.f_dc_0))) * 255;
+				// rgba[1] = (1 / (1 + Math.exp(-attrs.f_dc_1))) * 255;
+				// rgba[2] = (1 / (1 + Math.exp(-attrs.f_dc_2))) * 255;
+				const SH_C0 = 0.28209479177387814;
+				rgba[0] = (0.5 + SH_C0 * attrs.f_dc_0) * 255;
+				rgba[1] = (0.5 + SH_C0 * attrs.f_dc_1) * 255;
+				rgba[2] = (0.5 + SH_C0 * attrs.f_dc_2) * 255;
+			} else {
+				rgba[0] = attrs.red;
+				rgba[1] = attrs.green;
+				rgba[2] = attrs.blue;
+			}
+			if (types["opacity"]) {
+				rgba[3] = (1 / (1 + Math.exp(-attrs.opacity))) * 255;
+			} else {
+				rgba[3] = 255;
+			}
+		}
+		console.timeEnd("build buffer");
+		return buffer;
+	}
+	const throttledSort = () => {
+		if (!sortRunning) {
+			sortRunning = true;
+			let lastView = viewProj;
+			runSort(lastView);
+			setTimeout(() => {
+				sortRunning = false;
+				if (lastView !== viewProj) {
+					throttledSort();
+				}
+			}, 0);
+		}
+	};
+	let sortRunning;
+	self.onmessage = (e) => {
+		if (e.data.ply) {
+			vertexCount = 0;
+			runSort(viewProj);
+			buffer = processPlyBuffer(e.data.ply);
+			vertexCount = Math.floor(buffer.byteLength / rowLength);
+			postMessage({ buffer: buffer });
+		} else if (e.data.buffer) {
+			buffer = e.data.buffer;
+			vertexCount = e.data.vertexCount;
+		} else if (e.data.vertexCount) {
+			vertexCount = e.data.vertexCount;
+		} else if (e.data.view) {
+			viewProj = e.data.view;
+			throttledSort();
+		}
+	};
+}
+const vertexShaderSource = `
+    precision mediump float;
+  attribute vec2 position;
+  attribute vec4 color;
+  attribute vec4 quat;
+  attribute vec3 scale;
+  attribute vec3 center;
+  uniform mat4 projection, view;
+  uniform vec2 focal;
+  varying vec4 vColor;
+  varying vec3 vConic;
+  varying vec2 vCenter;
+  varying vec2 vPosition;
+  uniform vec2 viewport;
+  mat3 transpose(mat3 m) {
+    return mat3(
+        m[0][0], m[1][0], m[2][0],
+        m[0][1], m[1][1], m[2][1],
+        m[0][2], m[1][2], m[2][2]
+    );
+  }
+mat3 compute_cov3d(vec3 scale, vec4 rot) {
+    mat3 S = mat3(
+        scale.x, 0.0, 0.0,
+        0.0, scale.y, 0.0,
+        0.0, 0.0, scale.z
+    );
+    mat3 R = mat3(
+        1.0 - 2.0 * (rot.z * rot.z + rot.w * rot.w), 2.0 * (rot.y * rot.z - rot.x * rot.w), 2.0 * (rot.y * rot.w + rot.x * rot.z),
+        2.0 * (rot.y * rot.z + rot.x * rot.w), 1.0 - 2.0 * (rot.y * rot.y + rot.w * rot.w), 2.0 * (rot.z * rot.w - rot.x * rot.y),
+        2.0 * (rot.y * rot.w - rot.x * rot.z), 2.0 * (rot.z * rot.w + rot.x * rot.y), 1.0 - 2.0 * (rot.y * rot.y + rot.z * rot.z)
+    );
+    mat3 M = S * R;
+    return transpose(M) * M;
+}
+vec3 compute_cov2d(vec3 center, vec3 scale, vec4 rot){
+    mat3 Vrk = compute_cov3d(scale, rot);
+    vec4 t = view * vec4(center, 1.0);
+    vec2 lims = 1.3 * 0.5 * viewport / focal;
+    t.xy = min(lims, max(-lims, t.xy / t.z)) * t.z;
+    mat3 J = mat3(
+        focal.x / t.z, 0., -(focal.x * t.x) / (t.z * t.z),
+        0., focal.y / t.z, -(focal.y * t.y) / (t.z * t.z),
+        0., 0., 0.
+    );
+    mat3 W = transpose(mat3(view));
+    mat3 T = W * J;
+    mat3 cov = transpose(T) * transpose(Vrk) * T;
+    return vec3(cov[0][0] + 0.3, cov[0][1], cov[1][1] + 0.3);
+}
+  void main () {
+    vec4 camspace = view * vec4(center, 1);
+    vec4 pos2d = projection * mat4(1,0,0,0,0,-1,0,0,0,0,1,0,0,0,0,1) * camspace;
+    vec3 cov2d = compute_cov2d(center, scale, quat);
+    float det = cov2d.x * cov2d.z - cov2d.y * cov2d.y;
+    vec3 conic = vec3(cov2d.z, cov2d.y, cov2d.x) / det;
+    float mid = 0.5 * (cov2d.x + cov2d.z);
+    float lambda1 = mid + sqrt(max(0.1, mid * mid - det));
+    float lambda2 = mid - sqrt(max(0.1, mid * mid - det));
+    vec2 v1 = 7.0 * sqrt(lambda1) * normalize(vec2(cov2d.y, lambda1 - cov2d.x));
+    vec2 v2 = 7.0 * sqrt(lambda2) * normalize(vec2(-(lambda1 - cov2d.x),cov2d.y));
+    vColor = color;
+    vConic = conic;
+    vCenter = vec2(pos2d) / pos2d.w;
+    vPosition = vec2(vCenter + position.x * (position.y < 0.0 ? v1 : v2) / viewport);
+    gl_Position = vec4(vPosition, pos2d.z / pos2d.w, 1);
+  }
+  `;
+const fragmentShaderSource = `
+    precision mediump float;
+  varying vec4 vColor;
+  varying vec3 vConic;
+  varying vec2 vCenter;
+  uniform vec2 viewport;
+  uniform vec2 focal;
+  void main () {
+    vec2 d = (vCenter - 2.0 * (gl_FragCoord.xy/viewport - vec2(0.5, 0.5))) * viewport * 0.5;
+    float power = -0.5 * (vConic.x * d.x * d.x + vConic.z * d.y * d.y) - vConic.y * d.x * d.y;
+    if (power > 0.0) discard;
+    float alpha = min(0.99, vColor.a * exp(power));
+    if(alpha < 0.02) discard;
+    gl_FragColor = vec4(alpha * vColor.rgb, alpha);
+  }
+  `;
+// let viewMatrix = getViewMatrix(camera);
+let defaultViewMatrix = [
+	0.47, 0.04, 0.88, 0, -0.11, 0.99, 0.02, 0, -0.88, -0.11, 0.47, 0, 0.07,
+	0.03, 6.55, 1,
+];
+let viewMatrix = defaultViewMatrix;
+async function main() {
+	let carousel = true;
+	const params = new URLSearchParams(location.search);
+	try {
+		viewMatrix = JSON.parse(location.hash.slice(1));
+		carousel = false;
+	} catch (err) {}
+	const url = new URL(
+		params.get("url") || "train.splat",
+		"https://antimatter15.com/splat-data/",
+	);
+	const req = await fetch(url, {
+		mode: "cors", // no-cors, *cors, same-origin
+		credentials: "omit", // include, *same-origin, omit
+	});
+	console.log(req);
+	if (req.status != 200)
+		throw new Error("Unable to load " + req.url + ": " + req.statusText);
+	const rowLength = 3 * 4 + 3 * 4 + 4 + 4;
+	const reader = req.body.getReader();
+	let splatData = new Uint8Array(req.headers.get("content-length"));
+	const worker = new Worker(
+		URL.createObjectURL(
+			new Blob(["(", createWorker.toString(), ")(self)"], {
+				type: "application/javascript",
+			}),
+		),
+	);
+	const canvas = document.createElement("canvas");
+	canvas.width = innerWidth / 2;
+	canvas.height = innerHeight / 2;
+	canvas.style.position = "absolute";
+	canvas.style.top = 0;
+	canvas.style.left = 0;
+	canvas.style.width = "100%";
+	canvas.style.height = "100%";
+	document.body.appendChild(canvas);
+	const fps = document.createElement("div");
+	fps.style.position = "absolute";
+	fps.style.bottom = "10px";
+	fps.style.right = "10px";
+	document.body.appendChild(fps);
+	let projectionMatrix = getProjectionMatrix(
+		camera.fx / 2,
+		camera.fy / 2,
+		canvas.width,
+		canvas.height,
+	);
+	const gl = canvas.getContext("webgl");
+	const ext = gl.getExtension("ANGLE_instanced_arrays");
+	const vertexShader = gl.createShader(gl.VERTEX_SHADER);
+	gl.shaderSource(vertexShader, vertexShaderSource);
+	gl.compileShader(vertexShader);
+	if (!gl.getShaderParameter(vertexShader, gl.COMPILE_STATUS))
+		console.error(gl.getShaderInfoLog(vertexShader));
+	const fragmentShader = gl.createShader(gl.FRAGMENT_SHADER);
+	gl.shaderSource(fragmentShader, fragmentShaderSource);
+	gl.compileShader(fragmentShader);
+	if (!gl.getShaderParameter(fragmentShader, gl.COMPILE_STATUS))
+		console.error(gl.getShaderInfoLog(fragmentShader));
+	const program = gl.createProgram();
+	gl.attachShader(program, vertexShader);
+	gl.attachShader(program, fragmentShader);
+	gl.linkProgram(program);
+	gl.useProgram(program);
+	if (!gl.getProgramParameter(program, gl.LINK_STATUS))
+		console.error(gl.getProgramInfoLog(program));
+	gl.disable(gl.DEPTH_TEST); // Disable depth testing
+	// Enable blending
+	gl.enable(gl.BLEND);
+	// Set blending function
+	gl.blendFuncSeparate(
+		gl.ONE_MINUS_DST_ALPHA,
+		gl.ONE,
+		gl.ONE_MINUS_DST_ALPHA,
+		gl.ONE,
+	);
+	// Set blending equation
+	gl.blendEquationSeparate(gl.FUNC_ADD, gl.FUNC_ADD);
+	// projection
+	const u_projection = gl.getUniformLocation(program, "projection");
+	gl.uniformMatrix4fv(u_projection, false, projectionMatrix);
+	// viewport
+	const u_viewport = gl.getUniformLocation(program, "viewport");
+	gl.uniform2fv(u_viewport, new Float32Array([canvas.width, canvas.height]));
+	// focal
+	const u_focal = gl.getUniformLocation(program, "focal");
+	gl.uniform2fv(u_focal, new Float32Array([camera.fx / 2, camera.fy / 2]));
+	// view
+	const u_view = gl.getUniformLocation(program, "view");
+	gl.uniformMatrix4fv(u_view, false, viewMatrix);
+	// positions
+	const triangleVertices = new Float32Array([1, -1, 1, 1, -1, 1, -1, -1]);
+	const vertexBuffer = gl.createBuffer();
+	gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer);
+	gl.bufferData(gl.ARRAY_BUFFER, triangleVertices, gl.STATIC_DRAW);
+	const a_position = gl.getAttribLocation(program, "position");
+	gl.enableVertexAttribArray(a_position);
+	gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer);
+	gl.vertexAttribPointer(a_position, 2, gl.FLOAT, false, 0, 0);
+	// center
+	const centerBuffer = gl.createBuffer();
+	// gl.bindBuffer(gl.ARRAY_BUFFER, centerBuffer);
+	// gl.bufferData(gl.ARRAY_BUFFER, center, gl.STATIC_DRAW);
+	const a_center = gl.getAttribLocation(program, "center");
+	gl.enableVertexAttribArray(a_center);
+	gl.bindBuffer(gl.ARRAY_BUFFER, centerBuffer);
+	gl.vertexAttribPointer(a_center, 3, gl.FLOAT, false, 0, 0);
+	ext.vertexAttribDivisorANGLE(a_center, 1); // Use the extension here
+	// color
+	const colorBuffer = gl.createBuffer();
+	// gl.bindBuffer(gl.ARRAY_BUFFER, colorBuffer);
+	// gl.bufferData(gl.ARRAY_BUFFER, color, gl.STATIC_DRAW);
+	const a_color = gl.getAttribLocation(program, "color");
+	gl.enableVertexAttribArray(a_color);
+	gl.bindBuffer(gl.ARRAY_BUFFER, colorBuffer);
+	gl.vertexAttribPointer(a_color, 4, gl.FLOAT, false, 0, 0);
+	ext.vertexAttribDivisorANGLE(a_color, 1); // Use the extension here
+	// quat
+	const quatBuffer = gl.createBuffer();
+	// gl.bindBuffer(gl.ARRAY_BUFFER, quatBuffer);
+	// gl.bufferData(gl.ARRAY_BUFFER, quat, gl.STATIC_DRAW);
+	const a_quat = gl.getAttribLocation(program, "quat");
+	gl.enableVertexAttribArray(a_quat);
+	gl.bindBuffer(gl.ARRAY_BUFFER, quatBuffer);
+	gl.vertexAttribPointer(a_quat, 4, gl.FLOAT, false, 0, 0);
+	ext.vertexAttribDivisorANGLE(a_quat, 1); // Use the extension here
+	// scale
+	const scaleBuffer = gl.createBuffer();
+	// gl.bindBuffer(gl.ARRAY_BUFFER, scaleBuffer);
+	// gl.bufferData(gl.ARRAY_BUFFER, scale, gl.STATIC_DRAW);
+	const a_scale = gl.getAttribLocation(program, "scale");
+	gl.enableVertexAttribArray(a_scale);
+	gl.bindBuffer(gl.ARRAY_BUFFER, scaleBuffer);
+	gl.vertexAttribPointer(a_scale, 3, gl.FLOAT, false, 0, 0);
+	ext.vertexAttribDivisorANGLE(a_scale, 1); // Use the extension here
+	worker.onmessage = (e) => {
+		if (e.data.buffer) {
+			splatData = new Uint8Array(e.data.buffer);
+			const blob = new Blob([splatData.buffer], {
+				type: "application/octet-stream",
+			});
+			const link = document.createElement("a");
+			link.download = "model.splat";
+			link.href = URL.createObjectURL(blob);
+			document.body.appendChild(link);
+			link.click();
+		} else {
+			let { quat, scale, center, color } = e.data;
+			vertexCount = quat.length / 4;
+			gl.bindBuffer(gl.ARRAY_BUFFER, centerBuffer);
+			gl.bufferData(gl.ARRAY_BUFFER, center, gl.STATIC_DRAW);
+			gl.bindBuffer(gl.ARRAY_BUFFER, colorBuffer);
+			gl.bufferData(gl.ARRAY_BUFFER, color, gl.STATIC_DRAW);
+			gl.bindBuffer(gl.ARRAY_BUFFER, quatBuffer);
+			gl.bufferData(gl.ARRAY_BUFFER, quat, gl.STATIC_DRAW);
+			gl.bindBuffer(gl.ARRAY_BUFFER, scaleBuffer);
+			gl.bufferData(gl.ARRAY_BUFFER, scale, gl.STATIC_DRAW);
+		}
+	};
+	let activeKeys = [];
+	window.addEventListener("keydown", (e) => {
+		carousel = false;
+		if (!activeKeys.includes(e.key)) activeKeys.push(e.key);
+		if (/\d/.test(e.key)) {
+			viewMatrix = getViewMatrix(cameras[parseInt(e.key)]);
+		}
+		if (e.key == "v") {
+			location.hash =
+				"#" +
+				JSON.stringify(
+					viewMatrix.map((k) => Math.round(k * 100) / 100),
+				);
+		} else if (e.key === "p") {
+			carousel = true;
+		}
+	});
+	window.addEventListener("keyup", (e) => {
+		activeKeys = activeKeys.filter((k) => k !== e.key);
+	});
+	window.addEventListener(
+		"wheel",
+		(e) => {
+			carousel = false;
+			e.preventDefault();
+			const lineHeight = 10;
+			const scale =
+				e.deltaMode == 1
+					? lineHeight
+					: e.deltaMode == 2
+					? innerHeight
+					: 1;
+			const dy = e.deltaY * scale;
+			let inv = invert4(viewMatrix);
+			inv = translate4(inv, 0, 0, (-5 * dy) / innerHeight);
+			viewMatrix = invert4(inv);
+		},
+		{ passive: false },
+	);
+	let startX, startY, down;
+	document.addEventListener("mousedown", (e) => {
+		carousel = false;
+		e.preventDefault();
+		startX = e.clientX;
+		startY = e.clientY;
+		down = 1;
+	});
+	document.addEventListener("contextmenu", (e) => {
+		carousel = false;
+		e.preventDefault();
+		startX = e.clientX;
+		startY = e.clientY;
+		down = 2;
+	});
+	document.addEventListener("mousemove", (e) => {
+		e.preventDefault();
+		if (down == 1) {
+			let inv = invert4(viewMatrix);
+			inv = rotate4(
+				inv,
+				(-2 * (e.clientX - startX)) / innerWidth,
+				0,
+				1,
+				0,
+			);
+			inv = translate4(
+				inv,
+				(5 * (e.clientX - startX)) / innerWidth,
+				0,
+				0,
+			);
+			inv = translate4(
+				inv,
+				0,
+				0,
+				(10 * (e.clientY - startY)) / innerHeight,
+			);
+			viewMatrix = invert4(inv);
+			startX = e.clientX;
+			startY = e.clientY;
+		} else if (down == 2) {
+			let inv = invert4(viewMatrix);
+			// inv = rotateY(inv, );
+			inv = translate4(
+				inv,
+				(-10 * (e.clientX - startX)) / innerWidth,
+				(-10 * (e.clientY - startY)) / innerHeight,
+				0,
+			);
+			viewMatrix = invert4(inv);
+			startX = e.clientX;
+			startY = e.clientY;
+		}
+	});
+	document.addEventListener("mouseup", (e) => {
+		e.preventDefault();
+		down = false;
+		startX = 0;
+		startY = 0;
+	});
+	document.addEventListener(
+		"touchstart",
+		(e) => {
+			e.preventDefault();
+			if (e.touches.length === 1) {
+				carousel = false;
+				startX = e.touches[0].clientX;
+				startY = e.touches[0].clientY;
+				down = 1;
+			}
+		},
+		{ passive: false },
+	);
+	document.addEventListener(
+		"touchmove",
+		(e) => {
+			e.preventDefault();
+			if (e.touches.length === 1 && down) {
+				let inv = invert4(viewMatrix);
+				inv = rotate4(
+					inv,
+					(-0.6 * (e.touches[0].clientX - startX)) / innerWidth,
+					0,
+					1,
+					0,
+				);
+				inv = translate4(
+					inv,
+					0,
+					0,
+					(25 * (e.touches[0].clientY - startY)) / innerHeight,
+				);
+				viewMatrix = invert4(inv);
+				startX = e.touches[0].clientX;
+				startY = e.touches[0].clientY;
+			}
+		},
+		{ passive: false },
+	);
+	document.addEventListener(
+		"touchend",
+		(e) => {
+			e.preventDefault();
+			down = false;
+			startX = 0;
+			startY = 0;
+		},
+		{ passive: false },
+	);
+	let jumpDelta = 0;
+	let vertexCount = 0;
+	let lastFrame = 0;
+	let avgFps = 0;
+	let start = Date.now() + 2000;
+	const frame = (now) => {
+		let inv = invert4(viewMatrix);
+		// let preY = inv[13];
+		if (activeKeys.includes("ArrowUp")) inv = translate4(inv, 0, 0, 0.1);
+		if (activeKeys.includes("ArrowDown")) inv = translate4(inv, 0, 0, -0.1);
+		if (activeKeys.includes("ArrowLeft"))
+			inv = rotate4(inv, -0.01, 0, 1, 0);
+		if (activeKeys.includes("ArrowRight"))
+			inv = rotate4(inv, 0.01, 0, 1, 0);
+		if (activeKeys.includes("a")) inv = translate4(inv, -0.02, 0, 0);
+		if (activeKeys.includes("d")) inv = translate4(inv, 0.02, 0, 0);
+		if (activeKeys.includes("q")) inv = rotate4(inv, 0.01, 0, 0, 1);
+		if (activeKeys.includes("e")) inv = rotate4(inv, -0.01, 0, 0, 1);
+		if (activeKeys.includes("w")) inv = rotate4(inv, 0.005, 1, 0, 0);
+		if (activeKeys.includes("s")) inv = rotate4(inv, -0.005, 1, 0, 0);
+		// inv[13] = preY;
+		viewMatrix = invert4(inv);
+		if (carousel) {
+			let inv = invert4(defaultViewMatrix);
+			const t = Math.sin((Date.now() - start) / 5000);
+			inv = translate4(inv, 2.5 * t, 0, 10 * (1 - Math.cos(t)));
+			inv = rotate4(inv, -0.4 * t, 0, 1, 0);
+			viewMatrix = invert4(inv);
+		}
+		if (activeKeys.includes(" ")) {
+			jumpDelta = Math.min(1, jumpDelta + 0.05);
+		} else {
+			jumpDelta = Math.max(0, jumpDelta - 0.05);
+		}
+		let inv2 = invert4(viewMatrix);
+		inv2[13] -= jumpDelta;
+		inv2 = rotate4(inv2, -0.2 * jumpDelta, 1, 0, 0);
+		let actualViewMatrix = invert4(inv2);
+		const viewProj = multiply4(projectionMatrix, actualViewMatrix);
+		worker.postMessage({ view: viewProj });
+		const currentFps = 1000 / (now - lastFrame) || 0;
+		avgFps = avgFps * 0.9 + currentFps * 0.1;
+		if (vertexCount > 0) {
+			document.getElementById("spinner").style.display = "none";
+			gl.uniformMatrix4fv(u_view, false, actualViewMatrix);
+			// gl.clearColor(0.0, 0.0, 0.0, 1.0); // Set the clear color to black with full opacity
+			// gl.clear(gl.COLOR_BUFFER_BIT);
+			// gl.clearDepth(100000.0);
+			// gl.clear(gl.DEPTH_BUFFER_BIT);
+			ext.drawArraysInstancedANGLE(gl.TRIANGLE_STRIP, 0, 4, vertexCount);
+		} else {
+			gl.clear(gl.COLOR_BUFFER_BIT);
+			document.getElementById("spinner").style.display = "";
+		}
+		const progress = (100 * vertexCount) / (splatData.length / rowLength);
+		if (progress < 100) {
+			document.getElementById("progress").style.width = progress + "%";
+		} else {
+			document.getElementById("progress").style.display = "none";
+		}
+		fps.innerText =
+			Math.round(avgFps) +
+			" fps";
+		lastFrame = now;
+		requestAnimationFrame(frame);
+	};
+	frame();
+	const selectFile = (file) => {
+		const fr = new FileReader();
+		if (/\.json$/i.test(file.name)) {
+			fr.onload = () => {
+				cameras = JSON.parse(fr.result);
+				viewMatrix = getViewMatrix(cameras[0]);
+				projectionMatrix = getProjectionMatrix(
+					camera.fx / 2,
+					camera.fy / 2,
+					canvas.width,
+					canvas.height,
+				);
+				gl.uniformMatrix4fv(u_projection, false, projectionMatrix);
+				console.log("Loaded Cameras");
+			};
+			fr.readAsText(file);
+		} else {
+			stopLoading = true;
+			fr.onload = () => {
+				splatData = new Uint8Array(fr.result);
+				console.log("Loaded", Math.floor(splatData.length / rowLength));
+				if (
+					splatData[0] == 112 &&
+					splatData[1] == 108 &&
+					splatData[2] == 121 &&
+					splatData[3] == 10
+				) {
+					// ply file magic header means it should be handled differently
+					worker.postMessage({ ply: splatData.buffer });
+				} else {
+					worker.postMessage({
+						buffer: splatData.buffer,
+						vertexCount: Math.floor(splatData.length / rowLength),
+					});
+				}
+			};
+			fr.readAsArrayBuffer(file);
+		}
+	};
+	window.addEventListener("hashchange", (e) => {
+		try {
+			viewMatrix = JSON.parse(location.hash.slice(1));
+			carousel = false;
+		} catch (err) {}
+	});
+	document.addEventListener("dragenter", (e) => {
+		e.preventDefault();
+		e.stopPropagation();
+	});
+	document.addEventListener("dragover", (e) => {
+		e.preventDefault();
+		e.stopPropagation();
+	});
+	document.addEventListener("dragleave", (e) => {
+		e.preventDefault();
+		e.stopPropagation();
+	});
+	document.addEventListener("drop", (e) => {
+		e.preventDefault();
+		e.stopPropagation();
+		selectFile(e.dataTransfer.files[0]);
+	});
+	let bytesRead = 0;
+	let lastVertexCount = -1;
+	let stopLoading = false;
+	while (true) {
+		const { done, value } = await reader.read();
+		if (done || stopLoading) break;
+		splatData.set(value, bytesRead);
+		bytesRead += value.length;
+		if (vertexCount > lastVertexCount) {
+			worker.postMessage({
+				buffer: splatData.buffer,
+				vertexCount: Math.floor(bytesRead / rowLength),
+			});
+			lastVertexCount = vertexCount;
+		}
+	}
+	if (!stopLoading)
+		worker.postMessage({
+			buffer: splatData.buffer,
+			vertexCount: Math.floor(bytesRead / rowLength),
+		});
+}
+main().catch((err) => {
+	document.getElementById("spinner").style.display = "none";
+	document.getElementById("message").innerText = err.toString();
+});