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meshopt_encoder.js
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// This file is part of meshoptimizer library and is distributed under the terms of MIT License.
// Copyright (C) 2016-2025, by Arseny Kapoulkine (arseny.kapoulkine@gmail.com)
var MeshoptEncoder = (function () {
'use strict';
// Built with clang version 19.1.5-wasi-sdk
// Built from meshoptimizer 0.23
var wasm =
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hekcbabae9Rcifc98Gcbyd;y:kjjbfgdBd;y:kjjbdnadZbcztge9nmbadae9RcFFifcz4nb8Akkk;Qddbcjwk;mdbbbbdbbblbbbwbbbbbbbebbbdbbblbbbwbbbbbbbbbbbbbbbb4:h9w9N94:P:gW:j9O:ye9Pbbbbbbebbbdbbbebbbdbbbbbbbdbbbbbbbebbbbbbb:l29hZ;69:9kZ;N;76Z;rg97Z;z;o9xZ8J;B85Z;:;u9yZ;b;k9HZ:2;Z9DZ9e:l9mZ59A8KZ:r;T3Z:A:zYZ79OHZ;j4::8::Y:D9V8:bbbb9s:49:Z8R:hBZ9M9M;M8:L;z;o8:;8:PG89q;x:J878R:hQ8::M:B;e87bbbbbbjZbbjZbbjZ:E;V;N8::Y:DsZ9i;H;68:xd;R8:;h0838:;W:NoZbbbb:WV9O8:uf888:9i;H;68:9c9G;L89;n;m9m89;D8Ko8:bbbbf:8tZ9m836ZS:2AZL;zPZZ818EZ9e:lxZ;U98F8:819E;68:FFuuFFuuFFuuFFuFFFuFFFuFbc;mqkzebbbebbbdbbb9G:vbb'; // 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();
instance.exports.meshopt_encodeVertexVersion(0);
instance.exports.meshopt_encodeIndexVersion(1);
});
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);
}
function reorder(fun, indices, vertices, optf) {
var sbrk = instance.exports.sbrk;
var ip = sbrk(indices.length * 4);
var rp = sbrk(vertices * 4);
var heap = new Uint8Array(instance.exports.memory.buffer);
var indices8 = bytes(indices);
heap.set(indices8, ip);
if (optf) {
optf(ip, ip, indices.length, vertices);
}
var unique = fun(rp, ip, indices.length, vertices);
// heap may have grown
heap = new Uint8Array(instance.exports.memory.buffer);
var remap = new Uint32Array(vertices);
new Uint8Array(remap.buffer).set(heap.subarray(rp, rp + vertices * 4));
indices8.set(heap.subarray(ip, ip + indices.length * 4));
sbrk(ip - sbrk(0));
for (var i = 0; i < indices.length; ++i) indices[i] = remap[indices[i]];
return [remap, unique];
}
function spatialsort(fun, positions, count, stride) {
var sbrk = instance.exports.sbrk;
var ip = sbrk(count * 4);
var sp = sbrk(count * stride);
var heap = new Uint8Array(instance.exports.memory.buffer);
heap.set(bytes(positions), sp);
fun(ip, sp, count, stride);
// heap may have grown
heap = new Uint8Array(instance.exports.memory.buffer);
var remap = new Uint32Array(count);
new Uint8Array(remap.buffer).set(heap.subarray(ip, ip + count * 4));
sbrk(ip - sbrk(0));
return remap;
}
function encode(fun, bound, source, count, size) {
var sbrk = instance.exports.sbrk;
var tp = sbrk(bound);
var sp = sbrk(count * size);
var heap = new Uint8Array(instance.exports.memory.buffer);
heap.set(bytes(source), sp);
var res = fun(tp, bound, sp, count, size);
var target = new Uint8Array(res);
target.set(heap.subarray(tp, tp + res));
sbrk(tp - sbrk(0));
return target;
}
function maxindex(source) {
var result = 0;
for (var i = 0; i < source.length; ++i) {
var index = source[i];
result = result < index ? index : result;
}
return result;
}
function index32(source, size) {
assert(size == 2 || size == 4);
if (size == 4) {
return new Uint32Array(source.buffer, source.byteOffset, source.byteLength / 4);
} else {
var view = new Uint16Array(source.buffer, source.byteOffset, source.byteLength / 2);
return new Uint32Array(view); // copies each element
}
}
function filter(fun, source, count, stride, bits, insize, mode) {
var sbrk = instance.exports.sbrk;
var tp = sbrk(count * stride);
var sp = sbrk(count * insize);
var heap = new Uint8Array(instance.exports.memory.buffer);
heap.set(bytes(source), sp);
fun(tp, count, stride, bits, sp, mode);
var target = new Uint8Array(count * stride);
target.set(heap.subarray(tp, tp + count * stride));
sbrk(tp - sbrk(0));
return target;
}
return {
ready: ready,
supported: true,
reorderMesh: function (indices, triangles, optsize) {
var optf = triangles
? optsize
? instance.exports.meshopt_optimizeVertexCacheStrip
: instance.exports.meshopt_optimizeVertexCache
: undefined;
return reorder(instance.exports.meshopt_optimizeVertexFetchRemap, indices, maxindex(indices) + 1, optf);
},
reorderPoints: function (positions, positions_stride) {
assert(positions instanceof Float32Array);
assert(positions.length % positions_stride == 0);
assert(positions_stride >= 3);
return spatialsort(instance.exports.meshopt_spatialSortRemap, positions, positions.length / positions_stride, positions_stride * 4);
},
encodeVertexBuffer: function (source, count, size) {
assert(size > 0 && size <= 256);
assert(size % 4 == 0);
var bound = instance.exports.meshopt_encodeVertexBufferBound(count, size);
return encode(instance.exports.meshopt_encodeVertexBuffer, bound, source, count, size);
},
encodeIndexBuffer: function (source, count, size) {
assert(size == 2 || size == 4);
assert(count % 3 == 0);
var indices = index32(source, size);
var bound = instance.exports.meshopt_encodeIndexBufferBound(count, maxindex(indices) + 1);
return encode(instance.exports.meshopt_encodeIndexBuffer, bound, indices, count, 4);
},
encodeIndexSequence: function (source, count, size) {
assert(size == 2 || size == 4);
var indices = index32(source, size);
var bound = instance.exports.meshopt_encodeIndexSequenceBound(count, maxindex(indices) + 1);
return encode(instance.exports.meshopt_encodeIndexSequence, bound, indices, count, 4);
},
encodeGltfBuffer: function (source, count, size, mode) {
var table = {
ATTRIBUTES: this.encodeVertexBuffer,
TRIANGLES: this.encodeIndexBuffer,
INDICES: this.encodeIndexSequence,
};
assert(table[mode]);
return table[mode](source, count, size);
},
encodeFilterOct: function (source, count, stride, bits) {
assert(stride == 4 || stride == 8);
assert(bits >= 1 && bits <= 16);
return filter(instance.exports.meshopt_encodeFilterOct, source, count, stride, bits, 16);
},
encodeFilterQuat: function (source, count, stride, bits) {
assert(stride == 8);
assert(bits >= 4 && bits <= 16);
return filter(instance.exports.meshopt_encodeFilterQuat, source, count, stride, bits, 16);
},
encodeFilterExp: function (source, count, stride, bits, mode) {
assert(stride > 0 && stride % 4 == 0);
assert(bits >= 1 && bits <= 24);
var table = {
Separate: 0,
SharedVector: 1,
SharedComponent: 2,
Clamped: 3,
};
return filter(instance.exports.meshopt_encodeFilterExp, source, count, stride, bits, stride, mode ? table[mode] : 1);
},
};
})();
// export! MeshoptEncoder
if (typeof exports === 'object' && typeof module === 'object') module.exports = MeshoptEncoder;
else if (typeof define === 'function' && define['amd'])
define([], function () {
return MeshoptEncoder;
});
else if (typeof exports === 'object') exports['MeshoptEncoder'] = MeshoptEncoder;
else (typeof self !== 'undefined' ? self : this).MeshoptEncoder = MeshoptEncoder;