rlx-umap 0.2.4

Parametric UMAP on RLX — full fit/transform API and k-NN building blocks.
Documentation 
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// RLX — versatile ML compiler + runtime.
// Copyright (C) 2026 Eugene Hauptmann, Nataliya Kosmyna.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 3.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.

//! Compiled UMAP model graphs.

use rlx_runtime::{CompiledGraph, Session};

use crate::encoder::loss::UmapTrainGraph;
use crate::encoder::mlp::{ModelSpec, build_forward_graph};
use crate::weights::WeightStore;

pub struct CompiledUmap {
    pub forward: CompiledGraph,
    pub train: CompiledGraph,
    pub train_meta: UmapTrainGraph,
    pub spec: ModelSpec,
}

impl CompiledUmap {
    pub fn compile(session: &Session, spec: &ModelSpec, n_pos: usize, n_neg: usize) -> Self {
        let (fwd, _, _) = build_forward_graph(spec);
        let train_meta = crate::encoder::build_train_graph(spec, n_pos, n_neg);
        Self {
            forward: session.compile(fwd),
            train: session.compile(train_meta.backward.clone()),
            train_meta,
            spec: spec.clone(),
        }
    }

    pub fn set_weights(&mut self, w: &WeightStore) {
        w.apply(&mut self.forward);
        w.apply(&mut self.train);
    }

    pub fn forward_embedding(&mut self, x: &[f32]) -> Vec<f32> {
        let outs = self.forward.run(&[("x", x)]);
        outs.into_iter().next().unwrap_or_default()
    }
}