Bharat Consultancy ServicesConsulting services and AI careersA high-performance pipeline and web viewer that translates complex OpenSim biomechanical motion data (.osim, .mot, .trc) into lightweight binary .glb 3D animations viewable natively in any browser via Three.js.
Web-based 3D pipeline converting OpenSim musculoskeletal models into interactive WebGL browser animations.
These projects were shaped around practical business goals, so the case study starts with the context behind the build.
Specialized biomechanics software like OpenSim has long been the gold standard for analyzing human movement and joint forces, but sharing models traditionally required bulky local software or rendering intensive video files.
This project bridges the gap between high-fidelity musculoskeletal modeling and web performance, delivering a Python conversion pipeline and lightweight Three.js frontend for zero-plugin interactive 3D web playback.
The implementation combined interface thinking, product clarity, and delivery discipline instead of treating the work as a single design pass.
Designed a multi-step workflow spanning video pose tracking (MediaPipe Pose), OpenSim Inverse Kinematics (.trc / .mot), and automated .glb scene baking.
Built custom Python utilities (using PyGLTFLib and NumPy) to parse joint hierarchies, map coupled splines, and normalize coordinate spaces.
Implemented a WebGL frontend renderer using Three.js GLTFLoader with optional FABRIK IK solver support for client-side motion adjustment.
Watch the step-by-step video demonstration of OpenSim 3D biomechanical models running interactively in the web browser.
A strong project outcome depends on what actually gets delivered, not just how the final screen looks.
The OpenSim 3D Biomechanics Web Viewer enables researchers, sports scientists, and developers to render high-fidelity musculoskeletal simulations interactively directly in any web browser.
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