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Simplify normalization routine

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We don't need to explicitly allocate scratch space.
This commit is contained in:
Aaron Fenyes 2025-02-03 18:17:32 -08:00
parent fa1e54f171
commit 544249ae26
1 changed files with 5 additions and 8 deletions
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13
app-proto/src/assembly.rs
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@ -381,23 +381,20 @@ impl Assembly {
match elt.column_index {
Some(column_index) => {
// apply the deformation linearly
let rep_next = &*rep + motion_proj.column(column_index);
*rep += motion_proj.column(column_index);
// project back onto the mass shell by contracting
// toward the last coordinate axis
let q_sp = rep_next.fixed_rows::<3>(0).norm_squared();
let half_q_lt = -2.0 * rep_next[3] * rep_next[4];
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).copy_from(
&(rep_next.fixed_rows::<4>(0) / scaling)
);
rep[4] = rep_next[4];
rep.fixed_rows_mut::<4>(0).scale_mut(1.0 / scaling);
/* DEBUG */
// report self-product before and after projection
console::log_1(&JsValue::from(
format!("Self-product of element representation\n After step: {}\n Scaling: {}\n After scaling: {}", rep_next.dot(&(&*Q * &rep_next)), scaling, rep.dot(&(&*Q * &*rep)))
format!("After scaling by {}, self-product of element representation is {}", scaling, rep.dot(&(&*Q * &*rep)))
));
},
None => {