ShippingBoxEngine is a flagship SaaS product developed by FiberDepth. It automates the structural engineering of custom packaging, providing a high-fidelity bridge between 3D design and physical manufacturing.
In the packaging industry, there is a massive friction point between design and production. Designers want to see a 3D preview, but factories need a flat, precise 2D Dieline (SVG/DXF) with sub-millimeter accuracy. Most web tools offer one or the other; rarely do they sync both in real-time.
We developed ShippingBoxEngine, a browser-native CAD solution that allows users to manipulate 9 different industrial box types. As the user adjusts dimensions (L × W × H) on a 3D model, our engine dynamically recalculates the complex trigonometry required to generate a production-ready SVG dieline.
The packaging industry relies on precise 2D "dielines." A single millimeter error in structural design can lead to thousands of dollars in wasted material. Our task was to build an engine that guarantees precision while being simple enough for a non-engineer to use.
Unlike static templates, our engine uses a custom React-based SVG generator. We implemented a mathematical mapping system that converts real-world millimeters into digital pixels while maintaining strict proportions.
Key Innovation: We utilized the path command logic to draw complex curves and "locking flaps" dynamically. As seen in our implementation, the engine calculates "Safe Zones" and "Glue Flaps" using custom offsets (0.03% to 1.06% scaling factors) to ensure parts fit together perfectly when physically folded.
A major hurdle in web CAD is screen resolution. We built a conversion utility to bridge mm to px at a standard 72 DPI, ensuring that the "Download Mode" outputs a file that opens in Adobe Illustrator or a Laser Cutter at the exact intended size.
To handle large-format box designs (like shipping cartons), we integrated a high-performance transformation wrapper. This allows the user to inspect the fine details of the dieline—such as the double-scored fold lines—without losing clarity.
0.001mm tolerance mapping between 3D space and 2D vectors.
Real-time calculations handled entirely on the client-side for zero latency.
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