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Add a trait method to normalize representations

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This corrects the dispatching of the normalization routine for spheres,
and it adds a (perhaps redundant) normalization routine for points.
This commit is contained in:
Aaron Fenyes 2025-05-19 18:54:45 -07:00
parent 2adf4669f4
commit c263d5b8a6
2 changed files with 31 additions and 14 deletions
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15
app-proto/src/engine.rs
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@ -34,6 +34,21 @@ pub fn sphere_with_offset(dir_x: f64, dir_y: f64, dir_z: f64, off: f64, curv: f6
])
}
// normalize a sphere's representation vector by contracting toward the last
// coordinate axis
pub fn normalize_mut_sphere(rep: &mut DVector<f64>) {
let q_sp = rep.fixed_rows::<3>(0).norm_squared();
let half_q_lt = -2.0 * rep[3] * rep[4];
let half_q_lt_sq = half_q_lt * half_q_lt;
let scaling = half_q_lt + (q_sp + half_q_lt_sq).sqrt();
rep.fixed_rows_mut::<4>(0).scale_mut(1.0 / scaling);
}
// normalize a point's representation vector by scaling
pub fn normalize_mut_point(rep: &mut DVector<f64>) {
rep.scale_mut(0.5 / rep[3]);
}
// given a sphere's representation vector, change the sphere's half-curvature to
// `half-curv` and then restore normalization by contracting the representation
// vector toward the curvature axis