# Anatomical brain geometry

Original author: **Anderson Winkler**.

Source: [Brain for Blender](https://brainder.org/research/brain-for-blender/), MRI-derived cortical and subcortical surface reconstructions. Original downloads: `pial_DK_obj.tar.bz2` and `subcortical_obj.tar.bz2`.

Original and adapted geometry are licensed under [Creative Commons Attribution–ShareAlike 3.0 Unported](https://creativecommons.org/licenses/by-sa/3.0/). No endorsement by the original author is implied.

Changes in this version: deterministic vertex-clustering reduction, combination of cortical parcels, coordinate normalization, binary serialization, and educational colour assignments. Prefrontal highlighting covers selected parcels and is not a complete functional segmentation. A small sphere indicates an approximate hypothalamus location inferred from nearby ventral-diencephalon landmarks. Signal paths are custom schematic overlays, not MRI-derived tracts. They do not represent measured neural activity or realistic timing.

## Reusing the adapted geometry

`brain.bin` stores little-endian Float32 XYZ positions and Uint32 triangle indices. `brain.json` specifies byte offsets, vertex counts, index counts, source information and landmarks. Coordinates are y-up; anterior is negative z. Each mesh contains separate indexed triangles. Compute vertex normals on load.

Credit Anderson Winkler, link to the source and CC BY-SA 3.0 licence, indicate your changes, and distribute adaptations of the geometry under the same licence. The binary and metadata are made available together from the viewer's source disclosure. This asset licence does not purport to relicense unrelated site content or Three.js.