Add spherical harmonics support for Gaussian splats (new)#736
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Add spherical harmonics support for Gaussian splats (new)#736AntonioMacaronio wants to merge 1 commit into
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Port of the 2024 spherical-harmonics-support branch onto current main. `add_gaussian_splats()` accepts an optional `sh_coeffs` argument with (N, K, 3) coefficients in the 3DGS convention (K = 4/9/16 for degrees 1/2/3); colors are then computed per-vertex from the view direction in the shader, using gsplat's recurrence relations. Coefficients travel as float16 packed into a RGBA32UI texture, padded so each Gaussian spans a whole number of texels. Splat groups without harmonics composite correctly with groups that have them: they're promoted to DC-only coefficients derived from their RGBA colors. The 09_gaussian_splats example now reads f_rest_* fields from 3DGS .ply files. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Port of the 2024 spherical-harmonics-support branch onto current main.
add_gaussian_splats()accepts an optionalsh_coeffsargument with (N, K, 3) coefficients in the 3DGS convention (K = 4/9/16 for degrees 1/2/3); colors are then computed per-vertex from the view direction in the shader, using gsplat's recurrence relations.Coefficients travel as float16 packed into a RGBA32UI texture, padded so each Gaussian spans a whole number of texels. Splat groups without harmonics composite correctly with groups that have them: they're promoted to DC-only coefficients derived from their RGBA colors.
The 09_gaussian_splats example now reads f_rest_* fields from 3DGS .ply files.