3D Model Converter

In additive manufacturing and computational geometry, the integrity of a 3D mesh is as critical as the file format itself. A model with inverted normals or zero-area faces will fail in slicer software, resulting in print artifacts or complete job rejection. This tool solves the interoperability crisis between CAD software (SolidWorks, Fusion 360) and mesh-based applications (Blender, Cura) by performing strictly local, browser-based conversion.

Unlike server-side converters that compromise intellectual property by uploading proprietary geometry, this engine processes vertex data entirely within the client's memory. It parses ASCII mesh data to reconstruct the topology, calculates the bounding box tensor, and verifies the Euler characteristic to estimate mesh water-tightness. It serves engineers who need to convert legacy Wavefront OBJ files to Stereolithography (STL) for printing, or researchers needing to extract raw Point Cloud (XYZ) data from mesh surfaces.

Precision is maintained through double-precision floating-point arithmetic. The tool automatically handles coordinate system transformations and normal vector recalculation, ensuring that the lighting calculations in the target engine render correctly. It is designed for high-throughput workflows where file privacy and immediate feedback on mesh metrics (volume, surface area) are non-negotiable.

To verify if a mesh is suitable for 3D printing, we calculate the signed volume of the object using the divergence theorem. For a closed mesh comprised of triangles, where the i-th triangle has vertices v₁, v₂, and v₃, the volume V is:

We also calculate the total Surface Area A by summing the Euclidean areas of all triangles. The area of a single triangle is half the magnitude of the cross product of two edge vectors: