// This file is part of meshoptimizer library and is distributed under the terms of MIT License.
// Copyright (C) 2016-2024, by Arseny Kapoulkine (arseny.kapoulkine@gmail.com)
var MeshoptClusterizer = (function () {
	// Built with clang version 18.1.2
	// Built from meshoptimizer 0.22
	var wasm =
		'b9H79Tebbbefx9Geueu9Geub9Gbb9Giuuueu9Gkuuuuuuuuuu99eu9Gvuuuuueu9Gkuuuuuuuuu9999eu9Gruuuuuuub9Gkuuuuuuuuuuueu9Gouuuuuub9Giuuub9GluuuubiOHdilvorwDqrkbiibeilve9Weiiviebeoweuec:q:Odkr:Yewo9TW9T9VV95dbH9F9F939H79T9F9J9H229F9Jt9VV7bb8A9TW79O9V9Wt9F9I919P29K9nW79O2Wt79c9V919U9KbeX9TW79O9V9Wt9F9I919P29K9nW79O2Wt7bd39TW79O9V9Wt9F9J9V9T9W91tWJ2917tWV9c9V919U9K7br39TW79O9V9Wt9F9J9V9T9W91tW9nW79O2Wt9c9V919U9K7bDL9TW79O9V9Wt9F9V9Wt9P9T9P96W9nW79O2Wtbql79IV9RbkDwebcekdsPq;L9kHdbkIbabaec9:fgefcufae9Ugeabci9Uadfcufad9Ugbaeab0Ek:oAlPue99eux998Jjjjjbc:We9Rgk8Kjjjjbakc;mbfcbc;Kbz:njjjb8AakcuaocdtgxaocFFFFi0Egmcbyd:e1jjbHjjjjbbgPBd9makceBd:SeakaPBdnakamcbyd:e1jjbHjjjjbbgsBd9qakcdBd:SeakasBd9eakcualcdtalcFFFFi0Ecbyd:e1jjbHjjjjbbgzBd9uakazBd9iakciBd:SeaPcbaxz:njjjbhHalci9UhOdnalTmbaihPalhAinaHaPydbcdtfgCaCydbcefBdbaPclfhPaAcufgAmbkkdnaoTmbcbhPashAaHhCaohXinaAaPBdbaAclfhAaCydbaPfhPaCclfhCaXcufgXmbkkdnalci6mbcbhPaihAinaAcwfydbhCaAclfydbhXasaAydbcdtfgQaQydbgQcefBdbazaQcdtfaPBdbasaXcdtfgXaXydbgXcefBdbazaXcdtfaPBdbasaCcdtfgCaCydbgCcefBdbazaCcdtfaPBdbaAcxfhAaOaPcefgP9hmbkkdnaoTmbaHhAashPaohCinaPaPydbaAydb9RBdbaAclfhAaPclfhPaCcufgCmbkkakamcbyd:e1jjbHjjjjbbgPBd9yakclBd:SeaPaHaxz:mjjjbhmakaOcbyd:e1jjbHjjjjbbgPBd9CakcvBd:SeaPcbaOz:njjjbhLakcuaOcK2alcjjjjd0Ecbyd:e1jjbHjjjjbbgKBd9GakcoBd:SeJbbbbhYdnalci6g8Ambarcd4hxaihAaKhPaOhrJbbbbhEinavaAclfydbax2cdtfgCIdlh3avaAydbax2cdtfgXIdlhYavaAcwfydbax2cdtfgQIdlh5aCIdwh8EaXIdwh8FaQIdwhaaPaCIdbghaXIdbggMaQIdbg8JMJbbnn:vUdbaPclfaXIdlaCIdlMaQIdlMJbbnn:vUdbaQIdwh8KaCIdwh8LaXIdwh8MaPcxfa3aY:tg3aaa8F:tgaNa5aY:tg5a8Ea8F:tg8EN:tgYJbbbbJbbjZahag:tgha5Na8Jag:tgga3N:tg8Fa8FNaYaYNa8EagNaaahN:tgYaYNMM:rgg:vagJbbbb9BEg3NUdbaPczfaYa3NUdbaPcCfa8Fa3NUdbaPcwfa8Ka8Ma8LMMJbbnn:vUdbaEagMhEaAcxfhAaPcKfhParcufgrmbkaEaO:Z:vJbbbZNhYkakcuaOcdtalcFFFF970Ecbyd:e1jjbHjjjjbbgCBd9KakcrBd:SeaYaD:ZN:rhYdna8AmbcbhPaChAinaAaPBdbaAclfhAaOaPcefgP9hmbkkaYJbbbZNh8MakcuaOcltalcFFFFd0Ecbyd:e1jjbHjjjjbbg8ABd9OakcwBd:Secba8AaKaCaOz:djjjb8Aakaocbyd:e1jjbHjjjjbbgPBd2aPcFeaoz:njjjbhrakc8Wfcwf9cb83ibak9cb83i8WcbhPJbbbbhEJbbbbh5Jbbbbh8EJbbbbhYJbbbbh8FJbbbbhgcbhlinJbbbbh3dnaPTmbJbbjZaP:Z:vh3kaka8Ea3NgaUdaaka5a3NghUd3akaEa3Ng8JUdKJbbbbh3dnagagNaYaYNa8Fa8FNMMg8KJbbbb9BmbJbbjZa8K:r:vh3kakaga3NUd8Saka8Fa3NUdyakaYa3NUd8Kdndndnakyd8WgQakydUgAakcKfaeaiakc;abfaKamara8Maqz:ejjjbgCcuSmbdnaPaD9pmbaAaraiaCcx2fgXydbfRbbcFeSfaraXclfydbfRbbcFeSfaraXcwfydbfRbbcFeSfaw9nmdkaQaAcbaeaiakc;abfaKamara8MJbbbbz:ejjjbgCcu9hmekakaaUdCakahUdzaka8JUdxakcuBdwakcFFF;7rBdla8AcbaKaLakcxfakcwfakclfz:fjjjbakydwgCcuSmekdnakc8WfaiaCcx2fgOydbgPaOclfydbgAaOcwfydbgXarabaeadalawaDz:gjjjbTmbalcefhlJbbbbhEJbbbbh5Jbbbbh8EJbbbbhYJbbbbh8FJbbbbhgkamaPcdtfgPaPydbcufBdbamaAcdtfgPaPydbcufBdbamaXcdtfgPaPydbcufBdbcbhXinazasaOaXcdtfydbcdtgAfydbcdtfgxhPaHaAfgvydbgQhAdnaQTmbdninaPydbaCSmeaPclfhPaAcufgATmdxbkkaPaxaQcdtfc98fydbBdbavavydbcufBdbkaXcefgXci9hmbkaKaCcK2fgPIdbh3aPIdlhaaPIdwhhaPIdxh8JaPIdzh8KaPIdCh8LaLaCfce86bbaga8LMhga8Fa8KMh8FaYa8JMhYa8EahMh8Ea5aaMh5aEa3MhEakyd88hPxekkdnaPTmbdnakyd80gAaPci2fgCciGTmbadaCfcbaPaAcu7fciGcefz:njjjb8AkabalcltfgPak8Pi8W83dbaPcwfakc8Wfcwf8Pib83dbalcefhlkcahPdninaPc98Smeakc;mbfaPfydbcbydj1jjbH:bjjjbbaPc98fhPxbkkakc:Wef8Kjjjjbalk;3vivuv99lu8Jjjjjbca9Rgv8Kjjjjbdndnalcw0mbaiydbhoaeabcitfgralcdtcufBdlaraoBdbdnalcd6mbaiclfhoalcufhwarcxfhrinaoydbhDarcuBdbarc98faDBdbarcwfhraoclfhoawcufgwmbkkalabfhrxekcbhDavczfcwfcbBdbav9cb83izavcwfcbBdbav9cb83ibJbbjZhqJbbjZhkinadaiaDcdtfydbcK2fhwcbhrinavczfarfgoawarfIdbgxaoIdbgm:tgPakNamMgmUdbavarfgoaPaxam:tNaoIdbMUdbarclfgrcx9hmbkJbbjZaqJbbjZMgq:vhkaDcefgDal9hmbkcbhoadcbcecdavIdlgxavIdwgm9GEgravIdbgPam9GEaraPax9GEgscdtgrfhzavczfarfIdbhxaihralhwinaiaocdtfgDydbhHaDarydbgOBdbaraHBdbarclfhraoazaOcK2fIdbax9Dfhoawcufgwmbkaeabcitfhrdndnaocv6mbaoalc98f6mekaraiydbBdbaralcdtcufBdlaiclfhoalcufhwarcxfhrinaoydbhDarcuBdbarc98faDBdbarcwfhraoclfhoawcufgwmbkalabfhrxekaraxUdbaeabcitfgrarydlc98GasVBdlabcefaeadaiaoz:djjjbhwararydlciGawabcu7fcdtVBdlawaeadaiaocdtfalao9Rz:djjjbhrkavcaf8Kjjjjbark;Bloeue99vue99Due99dndnaembcuhkxekJbbjZaq:thxaiabcdtfhmavydbhPavydlhsavydwhzcbhHJFFuuhOcvhbcuhkindnaPamaHcdtfydbcdtgvfydbgATmbazasavfydbcdtfhiindndnawalaiydbgCcx2fgvclfydbgXfRbbcFeSawavydbgQfRbbcFeSfawavcwfydbgLfRbbcFeSfgKmbcbhvxekcehvaraQcdtfydbgYceSmbcehvaraXcdtfydbg8AceSmbcehvaraLcdtfydbgEceSmbdna8AcdSaYcdSfaEcdSfcd6mbaKcefhvxekaKcdfhvkdnavab9kmbdndnadTmbaoaCcK2fgQIdwadIdw:tg3a3NaQIdbadIdb:tg3a3NaQIdladIdl:tg3a3NMM:raD:vaxNJbbjZMJ9VO:d86JbbjZaQIdCadIdCNaQIdxadIdxNaQIdzadIdzNMMaqN:tg3a3J9VO:d869DENh3xekaraQcdtfydbaraXcdtfydbfaraLcdtfydbfc99f:Zh3kaCakavab6a3aO9DVgQEhkavabaQEhba3aOaQEhOkaiclfhiaAcufgAmbkkaHcefgHae9hmbkkakk;bddlue99dndndnabaecitfgrydlgwciGgDci9hmbarclfhqxekinabcbawcd4gwalaDcdtfIdbabaecitfIdb:tgkJbbbb9FEgDaecefgefadaialavaoz:fjjjbak:laoIdb9FTmdabaDaw7aefgecitfgrydlgwciGgDci9hmbkarclfhqkabaecitfhecuhbindnaiaeydbgDfRbbmbadaDcK2fgrIdwalIdw:tgkakNarIdbalIdb:tgkakNarIdlalIdl:tgkakNMM:rgkaoIdb9DTmbaoakUdbavaDBdbaqydbhwkaecwfheabcefgbawcd46mbkkk;yleoudnaladfgkRbbcFeSalaefgxRbbgmcFeSfabydwgPfalaifgsRbbcFeSfaD0abydxaq9pVgzce9hmbavawcltfgmab8Pdb83dbamcwfabcwfgm8Pdb83dbdndnamydbmbcbhqxekcbhDaohminalamabydbcdtfydbfcFe86bbamclfhmaDcefgDabydwgq6mbkkdnabydxglci2gDabydlgmfgPciGTmbaraPfcbalamcu7fciGcefz:njjjb8Aabydxci2hDabydlhmabydwhqkab9cb83dwababydbaqfBdbabaDcifc98GamfBdlaxRbbhmcbhPkdnamcFeGcFe9hmbaxaP86bbababydwgmcefBdwaoabydbcdtfamcdtfaeBdbkdnakRbbcFe9hmbakabydw86bbababydwgmcefBdwaoabydbcdtfamcdtfadBdbkdnasRbbcFe9hmbasabydw86bbababydwgmcefBdwaoabydbcdtfamcdtfaiBdbkarabydlfabydxci2faxRbb86bbarabydlfabydxci2fcefakRbb86bbarabydlfabydxci2fcdfasRbb86bbababydxcefBdxazk;Ckovud99euv99eul998Jjjjjbc:G;ae9Rgo8KjjjjbdndnadTmbavcd4hrcbhwcbhDindnaiaeclfydbar2cdtfgvIdbaiaeydbar2cdtfgqIdbgk:tgxaiaecwfydbar2cdtfgmIdlaqIdlgP:tgsNamIdbak:tgzavIdlaP:tgPN:tgkakNaPamIdwaqIdwgH:tgONasavIdwaH:tgHN:tgPaPNaHazNaOaxN:tgxaxNMM:rgsJbbbb9Bmbaoc:G:qefawcx2fgAakas:vUdwaAaxas:vUdlaAaPas:vUdbaocafawc8K2fgAaq8Pdb83dbaAav8Pdb83dxaAam8Pdb83dKaAcwfaqcwfydbBdbaAcCfavcwfydbBdbaAcafamcwfydbBdbawcefhwkaecxfheaDcifgDad6mbkab9cb83dbabcyf9cb83dbabcaf9cb83dbabcKf9cb83dbabczf9cb83dbabcwf9cb83dbawTmeao9cb83iKao9cb83izaoczfaocafawci2z1jjjbaoIdKhCaoIdChXaoIdzhQao9cb83iwao9cb83ibaoaoc:G:qefawz1jjjbJbbjZhkaoIdwgPJbbbbJbbjZaPaPNaoIdbgPaPNaoIdlgsasNMM:rgx:vaxJbbbb9BEgzNhxasazNhsaPazNhzaoc:G:qefheawhvinaecwfIdbaxNaeIdbazNasaeclfIdbNMMgPakaPak9DEhkaecxfheavcufgvmbkabaCUdwabaXUdlabaQUdbabaoId3UdxdndnakJ;n;m;m899FmbJbbbbhPaoc:G:qefheaocafhvinaCavcwfIdb:taecwfIdbgHNaQavIdb:taeIdbgONaXavclfIdb:taeclfIdbgLNMMaxaHNazaONasaLNMM:vgHaPaHaP9EEhPavc8KfhvaecxfheawcufgwmbkabazUd3abc8KfaxUdbabcafasUdbabcKfaCaxaPN:tUdbabcCfaXasaPN:tUdbabaQazaPN:tUdzabJbbjZakakN:t:rgkUdydndnaxJbbj:;axJbbj:;9GEgPJbbjZaPJbbjZ9FEJbb;:9cNJbbbZJbbb:;axJbbbb9GEMgP:lJbbb9p9DTmbaP:Ohexekcjjjj94hekabc8Ufae86bbdndnasJbbj:;asJbbj:;9GEgPJbbjZaPJbbjZ9FEJbb;:9cNJbbbZJbbb:;asJbbbb9GEMgP:lJbbb9p9DTmbaP:Ohvxekcjjjj94hvkabcRfav86bbdndnazJbbj:;azJbbj:;9GEgPJbbjZaPJbbjZ9FEJbb;:9cNJbbbZJbbb:;azJbbbb9GEMgP:lJbbb9p9DTmbaP:Ohqxekcjjjj94hqkabaq86b8SdndnaecKtcK91:YJbb;:9c:vax:t:lavcKtcK91:YJbb;:9c:vas:t:laqcKtcK91:YJbb;:9c:vaz:t:lakMMMJbb;:9cNJbbjZMgk:lJbbb9p9DTmbak:Ohexekcjjjj94hekaecFbaecFb9iEhexekabcjjj;8iBdycFbhekabae86b8Vxekab9cb83dbabcyf9cb83dbabcaf9cb83dbabcKf9cb83dbabczf9cb83dbabcwf9cb83dbkaoc:G;aef8Kjjjjbk:mvdouq99cbhi8Jjjjjbca9RglczfcwfcbBdbal9cb83izalcwfcbBdbal9cb83ibdnadTmbcbhvinaeaifhocbhrinalczfarfgwavawydbgwaoarfIdbgDaearawcx2ffIdb9DEBdbalarfgwavawydbgwaDaearawcx2ffIdb9EEBdbarclfgrcx9hmbkaicxfhiavcefgvad9hmbkkJbbbbhDcbhrcbhicbhvinaealarfydbcx2fgwIdwaealczfarfydbcx2fgoIdw:tgqaqNawIdbaoIdb:tgqaqNawIdlaoIdl:tgqaqNMMgqaDaqaD9EgwEhDavaiawEhiarclfhravcefgvci9hmbkaealczfaicdtgvfydbcx2fgrIdwaealavfydbcx2fglIdwMJbbbZNhqarIdlalIdlMJbbbZNhkarIdbalIdbMJbbbZNhxaD:rJbbbZNhDdnadTmbindnaecwfIdbgmaq:tgPaPNaeIdbgsax:tgPaPNaeclfIdbgzak:tgPaPNMMgPaDaDN9ETmbaqaDaP:rgH:vJbbbZNJbbbZMgPNamJbbjZaP:tgONMhqakaPNazaONMhkaxaPNasaONMhxaDaHMJbbbZNhDkaecxfheadcufgdmbkkabaDUdxabaqUdwabakUdlabaxUdbkjeeiu8Jjjjjbcj8W9Rgr8Kjjjjbaici2hwdnaiTmbawceawce0EhDarhiinaiaeadRbbcdtfydbBdbadcefhdaiclfhiaDcufgDmbkkabarawaladaoz:hjjjbarcj8Wf8Kjjjjbk:Ylequ8Jjjjjbcjx9Rgl8Kjjjjbcbhvalcjqfcbaiz:njjjb8AdndnadTmbcjehoaehrincuhwarhDcuhqavhkdninawakaoalcjqfaDcefRbbfRbb9RcFeGci6aoalcjqfaDRbbfRbb9RcFeGci6faoalcjqfaDcdfRbbfRbb9RcFeGci6fgxaq9mgmEhwdnammbaxce0mdkaxaqaxaq9kEhqaDcifhDadakcefgk9hmbkkaeawci2fgDcdfRbbhqaDcefRbbhxaDRbbhkaeavci2fgDcifaDawav9Rci2z:qjjjb8Aakalcjqffaocefgo86bbaxalcjqffao86bbaDcdfaq86bbaDcefax86bbaDak86bbaqalcjqffao86bbarcifhravcefgvad9hmbkalcFeaiz:njjjbhoadci2gDceaDce0EhqcbhxindnaoaeRbbgkfgwRbbgDcFe9hmbawax86bbaocjdfaxcdtfabakcdtfydbBdbaxhDaxcefhxkaeaD86bbaecefheaqcufgqmbkaxcdthDxekcbhDkabalcjdfaDz:mjjjb8Aalcjxf8Kjjjjbk9teiucbcbyd11jjbgeabcifc98GfgbBd11jjbdndnabZbcztgd9nmbcuhiabad9RcFFifcz4nbcuSmekaehikaik;LeeeudndnaeabVciGTmbabhixekdndnadcz9pmbabhixekabhiinaiaeydbBdbaiclfaeclfydbBdbaicwfaecwfydbBdbaicxfaecxfydbBdbaeczfheaiczfhiadc9Wfgdcs0mbkkadcl6mbinaiaeydbBdbaeclfheaiclfhiadc98fgdci0mbkkdnadTmbinaiaeRbb86bbaicefhiaecefheadcufgdmbkkabk;aeedudndnabciGTmbabhixekaecFeGc:b:c:ew2hldndnadcz9pmbabhixekabhiinaialBdbaicxfalBdbaicwfalBdbaiclfalBdbaiczfhiadc9Wfgdcs0mbkkadcl6mbinaialBdbaiclfhiadc98fgdci0mbkkdnadTmbinaiae86bbaicefhiadcufgdmbkkabk9teiucbcbyd11jjbgeabcrfc94GfgbBd11jjbdndnabZbcztgd9nmbcuhiabad9RcFFifcz4nbcuSmekaehikaik9:eiuZbhedndncbyd11jjbgdaecztgi9nmbcuheadai9RcFFifcz4nbcuSmekadhekcbabae9Rcifc98Gcbyd11jjbfgdBd11jjbdnadZbcztge9nmbadae9RcFFifcz4nb8Akk:;Deludndndnadch9pmbabaeSmdaeabadfgi9Rcbadcet9R0mekabaead;8qbbxekaeab7ciGhldndndnabae9pmbdnalTmbadhvabhixikdnabciGmbadhvabhixdkadTmiabaeRbb86bbadcufhvdnabcefgiciGmbaecefhexdkavTmiabaeRbe86beadc9:fhvdnabcdfgiciGmbaecdfhexdkavTmiabaeRbd86bdadc99fhvdnabcifgiciGmbaecifhexdkavTmiabaeRbi86biabclfhiaeclfheadc98fhvxekdnalmbdnaiciGTmbadTmlabadcufgifglaeaifRbb86bbdnalciGmbaihdxekaiTmlabadc9:fgifglaeaifRbb86bbdnalciGmbaihdxekaiTmlabadc99fgifglaeaifRbb86bbdnalciGmbaihdxekaiTmlabadc98fgdfaeadfRbb86bbkadcl6mbdnadc98fgocd4cefciGgiTmbaec98fhlabc98fhvinavadfaladfydbBdbadc98fhdaicufgimbkkaocx6mbaec9Wfhvabc9WfhoinaoadfgicxfavadfglcxfydbBdbaicwfalcwfydbBdbaiclfalclfydbBdbaialydbBdbadc9Wfgdci0mbkkadTmdadhidnadciGglTmbaecufhvabcufhoadhiinaoaifavaifRbb86bbaicufhialcufglmbkkadcl6mdaec98fhlabc98fhvinavaifgecifalaifgdcifRbb86bbaecdfadcdfRbb86bbaecefadcefRbb86bbaeadRbb86bbaic98fgimbxikkavcl6mbdnavc98fglcd4cefcrGgdTmbavadcdt9RhvinaiaeydbBdbaeclfheaiclfhiadcufgdmbkkalc36mbinaiaeydbBdbaiaeydlBdlaiaeydwBdwaiaeydxBdxaiaeydzBdzaiaeydCBdCaiaeydKBdKaiaeyd3Bd3aecafheaicafhiavc9Gfgvci0mbkkavTmbdndnavcrGgdmbavhlxekavc94GhlinaiaeRbb86bbaicefhiaecefheadcufgdmbkkavcw6mbinaiaeRbb86bbaiaeRbe86beaiaeRbd86bdaiaeRbi86biaiaeRbl86blaiaeRbv86bvaiaeRbo86boaiaeRbr86braicwfhiaecwfhealc94fglmbkkabkkAebcjwkxebbbdbbbzNbb'; // embed! wasm

	var wasmpack = new Uint8Array([
		32, 0, 65, 2, 1, 106, 34, 33, 3, 128, 11, 4, 13, 64, 6, 253, 10, 7, 15, 116, 127, 5, 8, 12, 40, 16, 19, 54, 20, 9, 27, 255, 113, 17, 42, 67,
		24, 23, 146, 148, 18, 14, 22, 45, 70, 69, 56, 114, 101, 21, 25, 63, 75, 136, 108, 28, 118, 29, 73, 115,
	]);

	if (typeof WebAssembly !== 'object') {
		return {
			supported: false,
		};
	}

	var instance;

	var ready = WebAssembly.instantiate(unpack(wasm), {}).then(function (result) {
		instance = result.instance;
		instance.exports.__wasm_call_ctors();
	});

	function unpack(data) {
		var result = new Uint8Array(data.length);
		for (var i = 0; i < data.length; ++i) {
			var ch = data.charCodeAt(i);
			result[i] = ch > 96 ? ch - 97 : ch > 64 ? ch - 39 : ch + 4;
		}
		var write = 0;
		for (var i = 0; i < data.length; ++i) {
			result[write++] = result[i] < 60 ? wasmpack[result[i]] : (result[i] - 60) * 64 + result[++i];
		}
		return result.buffer.slice(0, write);
	}

	function assert(cond) {
		if (!cond) {
			throw new Error('Assertion failed');
		}
	}

	function bytes(view) {
		return new Uint8Array(view.buffer, view.byteOffset, view.byteLength);
	}

	var BOUNDS_SIZE = 48;
	var MESHLET_SIZE = 16;

	function extractMeshlet(buffers, index) {
		var vertex_offset = buffers.meshlets[index * 4 + 0];
		var triangle_offset = buffers.meshlets[index * 4 + 1];
		var vertex_count = buffers.meshlets[index * 4 + 2];
		var triangle_count = buffers.meshlets[index * 4 + 3];

		return {
			vertices: buffers.vertices.subarray(vertex_offset, vertex_offset + vertex_count),
			triangles: buffers.triangles.subarray(triangle_offset, triangle_offset + triangle_count * 3),
		};
	}

	function buildMeshlets(indices, vertex_positions, vertex_count, vertex_positions_stride, max_vertices, max_triangles, cone_weight) {
		var sbrk = instance.exports.sbrk;
		var max_meshlets = instance.exports.meshopt_buildMeshletsBound(indices.length, max_vertices, max_triangles);

		// allocate memory
		var meshletsp = sbrk(max_meshlets * MESHLET_SIZE);
		var meshlet_verticesp = sbrk(max_meshlets * max_vertices * 4);
		var meshlet_trianglesp = sbrk(max_meshlets * max_triangles * 3);

		var indicesp = sbrk(indices.byteLength);
		var verticesp = sbrk(vertex_positions.byteLength);

		// copy input data to wasm memory
		var heap = new Uint8Array(instance.exports.memory.buffer);
		heap.set(bytes(indices), indicesp);
		heap.set(bytes(vertex_positions), verticesp);

		var count = instance.exports.meshopt_buildMeshlets(
			meshletsp,
			meshlet_verticesp,
			meshlet_trianglesp,
			indicesp,
			indices.length,
			verticesp,
			vertex_count,
			vertex_positions_stride,
			max_vertices,
			max_triangles,
			cone_weight
		);

		// heap might (will?) have grown -> re-acquire
		heap = new Uint8Array(instance.exports.memory.buffer);

		var meshletBytes = heap.subarray(meshletsp, meshletsp + count * MESHLET_SIZE);
		var meshlets = new Uint32Array(meshletBytes.buffer, meshletBytes.byteOffset, meshletBytes.byteLength / 4).slice();

		for (var i = 0; i < count; ++i) {
			var vertex_offset = meshlets[i * 4 + 0];
			var triangle_offset = meshlets[i * 4 + 1];
			var vertex_count = meshlets[i * 4 + 2];
			var triangle_count = meshlets[i * 4 + 3];

			instance.exports.meshopt_optimizeMeshlet(
				meshlet_verticesp + vertex_offset * 4,
				meshlet_trianglesp + triangle_offset,
				triangle_count,
				vertex_count
			);
		}

		var last_vertex_offset = meshlets[(count - 1) * 4 + 0];
		var last_triangle_offset = meshlets[(count - 1) * 4 + 1];
		var last_vertex_count = meshlets[(count - 1) * 4 + 2];
		var last_triangle_count = meshlets[(count - 1) * 4 + 3];

		var used_vertices = last_vertex_offset + last_vertex_count;
		var used_triangles = last_triangle_offset + ((last_triangle_count * 3 + 3) & ~3);

		var result = {
			meshlets: meshlets,
			vertices: new Uint32Array(heap.buffer, meshlet_verticesp, used_vertices).slice(),
			triangles: new Uint8Array(heap.buffer, meshlet_trianglesp, used_triangles * 3).slice(),
			meshletCount: count,
		};

		// reset memory
		sbrk(meshletsp - sbrk(0));

		return result;
	}

	function extractBounds(boundsp) {
		var bounds_floats = new Float32Array(instance.exports.memory.buffer, boundsp, BOUNDS_SIZE / 4);

		// see meshopt_Bounds in meshoptimizer.h for layout
		return {
			centerX: bounds_floats[0],
			centerY: bounds_floats[1],
			centerZ: bounds_floats[2],
			radius: bounds_floats[3],
			coneApexX: bounds_floats[4],
			coneApexY: bounds_floats[5],
			coneApexZ: bounds_floats[6],
			coneAxisX: bounds_floats[7],
			coneAxisY: bounds_floats[8],
			coneAxisZ: bounds_floats[9],
			coneCutoff: bounds_floats[10],
		};
	}

	function computeMeshletBounds(buffers, vertex_positions, vertex_count, vertex_positions_stride) {
		var sbrk = instance.exports.sbrk;

		var results = [];

		// allocate memory that's constant for all meshlets
		var verticesp = sbrk(vertex_positions.byteLength);
		var meshlet_verticesp = sbrk(buffers.vertices.byteLength);
		var meshlet_trianglesp = sbrk(buffers.triangles.byteLength);
		var resultp = sbrk(BOUNDS_SIZE);

		// copy vertices to wasm memory
		var heap = new Uint8Array(instance.exports.memory.buffer);
		heap.set(bytes(vertex_positions), verticesp);
		heap.set(bytes(buffers.vertices), meshlet_verticesp);
		heap.set(bytes(buffers.triangles), meshlet_trianglesp);

		for (var i = 0; i < buffers.meshletCount; ++i) {
			var vertex_offset = buffers.meshlets[i * 4 + 0];
			var triangle_offset = buffers.meshlets[i * 4 + 0 + 1];
			var triangle_count = buffers.meshlets[i * 4 + 0 + 3];

			instance.exports.meshopt_computeMeshletBounds(
				resultp,
				meshlet_verticesp + vertex_offset * 4,
				meshlet_trianglesp + triangle_offset,
				triangle_count,
				verticesp,
				vertex_count,
				vertex_positions_stride
			);

			results.push(extractBounds(resultp));
		}

		// reset memory
		sbrk(verticesp - sbrk(0));

		return results;
	}

	function computeClusterBounds(indices, vertex_positions, vertex_count, vertex_positions_stride) {
		var sbrk = instance.exports.sbrk;

		// allocate memory
		var resultp = sbrk(BOUNDS_SIZE);
		var indicesp = sbrk(indices.byteLength);
		var verticesp = sbrk(vertex_positions.byteLength);

		// copy input data to wasm memory
		var heap = new Uint8Array(instance.exports.memory.buffer);
		heap.set(bytes(indices), indicesp);
		heap.set(bytes(vertex_positions), verticesp);

		instance.exports.meshopt_computeClusterBounds(resultp, indicesp, indices.length, verticesp, vertex_count, vertex_positions_stride);

		var result = extractBounds(resultp);

		// reset memory
		sbrk(resultp - sbrk(0));

		return result;
	}

	return {
		ready: ready,
		supported: true,
		buildMeshlets: function (indices, vertex_positions, vertex_positions_stride, max_vertices, max_triangles, cone_weight) {
			assert(indices.length % 3 == 0);
			assert(vertex_positions instanceof Float32Array);
			assert(vertex_positions.length % vertex_positions_stride == 0);
			assert(vertex_positions_stride >= 3);
			assert(max_vertices <= 255 || max_vertices > 0);
			assert(max_triangles <= 512);
			assert(max_triangles % 4 == 0);

			cone_weight = cone_weight || 0.0;

			var indices32 = indices.BYTES_PER_ELEMENT == 4 ? indices : new Uint32Array(indices);

			return buildMeshlets(
				indices32,
				vertex_positions,
				vertex_positions.length / vertex_positions_stride,
				vertex_positions_stride * 4,
				max_vertices,
				max_triangles,
				cone_weight
			);
		},
		computeClusterBounds: function (indices, vertex_positions, vertex_positions_stride) {
			assert(indices.length % 3 == 0);
			assert(indices.length / 3 <= 512);
			assert(vertex_positions instanceof Float32Array);
			assert(vertex_positions.length % vertex_positions_stride == 0);
			assert(vertex_positions_stride >= 3);

			var indices32 = indices.BYTES_PER_ELEMENT == 4 ? indices : new Uint32Array(indices);

			return computeClusterBounds(indices32, vertex_positions, vertex_positions.length / vertex_positions_stride, vertex_positions_stride * 4);
		},
		computeMeshletBounds: function (buffers, vertex_positions, vertex_positions_stride) {
			assert(buffers.meshletCount != 0);
			assert(vertex_positions instanceof Float32Array);
			assert(vertex_positions.length % vertex_positions_stride == 0);
			assert(vertex_positions_stride >= 3);

			return computeMeshletBounds(buffers, vertex_positions, vertex_positions.length / vertex_positions_stride, vertex_positions_stride * 4);
		},
		extractMeshlet: function (buffers, index) {
			assert(index >= 0 && index < buffers.meshletCount);

			return extractMeshlet(buffers, index);
		},
	};
})();

export { MeshoptClusterizer };