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Changed to write stream for large obj files

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Lucas Dower 2022-06-15 18:52:28 +01:00
parent 091916f051
commit 173984ad8f
1 changed files with 13 additions and 12 deletions
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25
src/exporters/obj_exporter.ts
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@ -43,17 +43,18 @@ export class ObjExporter extends IExporter {
const blockTexcoordData = buffer.blockTexcoord.data as Float32Array;
const indexData = buffer.indices.data as Uint32Array;
const objData: string[] = [];
objData.push('# Created with ObjToSchematic');
objData.push('# https://github.com/LucasDower/ObjToSchematic/');
const writeStream = fs.createWriteStream(filepath);
writeStream.write('# Created with ObjToSchematic\n');
writeStream.write('# https://github.com/LucasDower/ObjToSchematic/\n\n');
if (positionData && normalData && texcoordData && indexData && blockTexcoordData) {
const numTris = indexData.length / 3;
// Add vertex data
objData.push(`mtllib ${mtlRelativePath}`);
objData.push(`o Object`);
writeStream.write(`mtllib ${mtlRelativePath}\n`);
writeStream.write(`o Object\n`);
for (let i = 0; i < positionData.length / 3; ++i) {
objData.push(`v ${positionData[3 * i + 0]} ${positionData[3 * i + 1]} ${positionData[3 * i + 2]}`);
writeStream.write(`v ${positionData[3 * i + 0]} ${positionData[3 * i + 1]} ${positionData[3 * i + 2]}\n`);
}
// Add texcoord data
const atlasSize = blockMesh.getAtlasSize();
@ -61,25 +62,25 @@ export class ObjExporter extends IExporter {
// vec2 tex = v_blockTexcoord + (v_texcoord / (u_atlasSize * 3.0));
const u = blockTexcoordData[2 * i + 0] + (texcoordData[2 * i + 0] / (atlasSize * 3.0));
const v = blockTexcoordData[2 * i + 1] + (texcoordData[2 * i + 1] / (atlasSize * 3.0));
objData.push(`vt ${u} ${1.0 - v}`);
writeStream.write(`vt ${u} ${1.0 - v}\n`);
}
// Add normal data
for (let i = 0; i < normalData.length / 3; ++i) {
objData.push(`vn ${normalData[3 * i + 0]} ${normalData[3 * i + 1]} ${normalData[3 * i + 2]}`);
writeStream.write(`vn ${normalData[3 * i + 0]} ${normalData[3 * i + 1]} ${normalData[3 * i + 2]}\n`);
}
objData.push(`usemtl Default`);
writeStream.write(`usemtl Default\n`);
// Add face data
for (let i = 0; i < numTris * 3; i += 3) {
const a = indexData[i + 0] + 1;
const b = indexData[i + 1] + 1;
const c = indexData[i + 2] + 1;
objData.push(`f ${a}/${a}/${a} ${b}/${b}/${b} ${c}/${c}/${c}`);
writeStream.write(`f ${a}/${a}/${a} ${b}/${b}/${b} ${c}/${c}/${c}\n`);
}
// Export to file
const outputString = objData.join('\n');
fs.writeFileSync(filepath, outputString);
}
writeStream.end();
}
private _exportMTL(filepathMTL: string, filepathTexture: string, blockMesh: BlockMesh) {