🧠 Click a .tck file → see it in 3D. Just like NIfTI viewers, but for tractography.

• One-click viewing — Open any .tck file from the VS Code file explorer
• Interactive 3D — Rotate, zoom, and pan with orbit controls (Three.js)
• Directional RGB coloring — Red = Left-Right, Green = Anterior-Posterior, Blue = Superior-Inferior
• Multiple color modes — Directional, length-based (viridis colormap), or uniform
• Preset views — Superior, Anterior, Left, Right, Reset
• Adjustable line width — Real-time slider
• Performance — Handles hundreds of thousands of streamlines via subsampling
• HUD — File name, streamline count, FPS counter
• Configurable — Max streamlines, default color mode, background color, line width via VS Code settings

1. Open a folder containing .tck files in VS Code
2. Click on any .tck file in the Explorer
3. The 3D viewer opens automatically

Or use the command palette: TCK Viewer: Open TCK File

• Color mode: Directional / Length / Uniform
• Views: S (superior), A (anterior), L (left), R (right), ⟲ (reset)
• Line width: Adjustable slider

• MRtrix3 .tck — Standard tractography format from MRtrix3, produced by tckgen

• VS Code ≥ 1.80.0
• No external dependencies needed at runtime

MIT