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Refactor code structure for improved readability and maintainability

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CNCKitchen
2026-03-18 10:52:39 +01:00
parent f88504696d
commit adab788c74
5 changed files with 119 additions and 19 deletions
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js/decimation.js
+18 -1
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@@ -569,9 +569,26 @@ function buildOutput(positions, faces, faceCount) {
}
}
// Compute exact per-face normals from the final positions so winding order
// always agrees with the stored normals (computeVertexNormals averages across
// shared positions and can flip normals on excluded surfaces).
const nrmArray = new Float32Array(posArray.length);
for (let i = 0; i < posArray.length; i += 9) {
const ax = posArray[i], ay = posArray[i+1], az = posArray[i+2];
const bx = posArray[i+3], by = posArray[i+4], bz = posArray[i+5];
const cx = posArray[i+6], cy = posArray[i+7], cz = posArray[i+8];
const ux = bx-ax, uy = by-ay, uz = bz-az;
const vx = cx-ax, vy = cy-ay, vz = cz-az;
const nx = uy*vz - uz*vy, ny = uz*vx - ux*vz, nz = ux*vy - uy*vx;
const len = Math.sqrt(nx*nx + ny*ny + nz*nz) || 1;
nrmArray[i] = nrmArray[i+3] = nrmArray[i+6] = nx / len;
nrmArray[i+1] = nrmArray[i+4] = nrmArray[i+7] = ny / len;
nrmArray[i+2] = nrmArray[i+5] = nrmArray[i+8] = nz / len;
}
const geo = new THREE.BufferGeometry();
geo.setAttribute('position', new THREE.BufferAttribute(posArray, 3));
geo.computeVertexNormals();
geo.setAttribute('normal', new THREE.BufferAttribute(nrmArray, 3));
return geo;
}