I recently built a small Python tool that visualizes Miller indices crystallographic planes interactively and it turned out to be one of the most useful study aids I have made. The script takes (h k l) inputs and renders a 3D plot showing: → The Miller plane cutting through a unit cube → Axis intercepts with labels → The normal direction vector (h k l) → Shifted origin handling for negative indices Built with NumPy for geometry calculations and Plotly for interactive 3D rendering. As an engineering student currently studying crystallography, I found that actively building a visualization tool forced me to deeply understand the underlying math : intercept reciprocals, polygon sorting, coordinate transformations in a way that passive reading never does. The project also pushed me to grow practically with Python: handling edge cases, structuring clean functions and working with 3D data for the first time. I don't know yet where this kind of work will take me. But I do know that curiosity driven projects even small ones compound over time. #Python #MaterialsEngineering #Crystallography #MillerIndices #NumPy #Plotly #RUET #EngineeringStudent #LearningByDoing #ComputationalEngineering

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