From f332f755e0966ef8e643e82d13860d3cc18fac86 Mon Sep 17 00:00:00 2001
From: Aaron Fenyes <aaron.fenyes@fareycircles.ooo>
Date: Sun, 1 Jun 2025 10:49:50 -0700
Subject: [PATCH] Improve the naming of the normalization methods

---
 app-proto/src/assembly.rs | 19 ++++++++++---------
 app-proto/src/engine.rs   |  8 ++++----
 2 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/app-proto/src/assembly.rs b/app-proto/src/assembly.rs
index 2a23b4a..6c91fc0 100644
--- a/app-proto/src/assembly.rs
+++ b/app-proto/src/assembly.rs
@@ -18,9 +18,9 @@ use crate::{
         Q,
         change_half_curvature,
         local_unif_to_std,
-        normalize_mut_point,
-        normalize_mut_sphere,
         point,
+        project_point_to_normalized,
+        project_sphere_to_normalized,
         realize_gram,
         sphere,
         ConfigSubspace,
@@ -108,8 +108,9 @@ pub trait Element: Serial + ProblemPoser + DisplayItem {
     // element is responsible for keeping this set up to date
     fn regulators(&self) -> Signal<BTreeSet<Rc<dyn Regulator>>>;
     
-    // normalize a representation vector for this kind of element
-    fn normalize_mut_rep(&self, rep: &mut DVector<f64>);
+    // project a representation vector for this kind of element onto its
+    // normalization variety
+    fn project_to_normalized(&self, rep: &mut DVector<f64>);
     
     // the configuration matrix column index that was assigned to the element
     // last time the assembly was realized, or `None` if the element has never
@@ -225,8 +226,8 @@ impl Element for Sphere {
         self.regulators
     }
     
-    fn normalize_mut_rep(&self, rep: &mut DVector<f64>) {
-        normalize_mut_sphere(rep);
+    fn project_to_normalized(&self, rep: &mut DVector<f64>) {
+        project_sphere_to_normalized(rep);
     }
     
     fn column_index(&self) -> Option<usize> {
@@ -321,8 +322,8 @@ impl Element for Point {
         self.regulators
     }
     
-    fn normalize_mut_rep(&self, rep: &mut DVector<f64>) {
-        normalize_mut_point(rep);
+    fn project_to_normalized(&self, rep: &mut DVector<f64>) {
+        project_point_to_normalized(rep);
     }
     
     fn column_index(&self) -> Option<usize> {
@@ -789,7 +790,7 @@ impl Assembly {
                         // step the element along the deformation and then
                         // restore its normalization
                         *rep += motion_proj.column(column_index);
-                        elt.normalize_mut_rep(rep);
+                        elt.project_to_normalized(rep);
                     },
                     None => {
                         console_log!("No velocity to unpack for fresh element \"{}\"", elt.id())
diff --git a/app-proto/src/engine.rs b/app-proto/src/engine.rs
index 03d13a9..c5d7b00 100644
--- a/app-proto/src/engine.rs
+++ b/app-proto/src/engine.rs
@@ -35,9 +35,9 @@ 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>) {
+// project a sphere's representation vector to the normalization variety by
+// contracting toward the last coordinate axis
+pub fn project_sphere_to_normalized(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;
@@ -46,7 +46,7 @@ pub fn normalize_mut_sphere(rep: &mut DVector<f64>) {
 }
 
 // normalize a point's representation vector by scaling
-pub fn normalize_mut_point(rep: &mut DVector<f64>) {
+pub fn project_point_to_normalized(rep: &mut DVector<f64>) {
     rep.scale_mut(0.5 / rep[3]);
 }