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Revert "remove negligible vector projection"

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This reverts commit 6123c02581.
This commit is contained in:
root 2025-04-24 12:00:29 +00:00
parent 6123c02581
commit f70370d05e
1 changed files with 18 additions and 2 deletions
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20
sketch.js
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@ -38,18 +38,34 @@ function move_charges() {
const acceleration_mag = 1 / displacement.mag() * 0.005;
let ai = displacement.copy().normalize().mult(acceleration_mag);
let aj = p5.Vector.mult(ai, -1);
charges[i].acceleration.add(ai);
charges[j].acceleration.add(aj);
let ai_norm = project_onto_plane(ai, charges[i].position);
let aj_norm = project_onto_plane(aj, charges[j].position);
charges[i].acceleration.add(ai_norm);
charges[j].acceleration.add(aj_norm);
}
}
for (let i = 0; i < charges.length; i += 1) {
let charge = charges[i];
charge.velocity = charge.velocity.add(charge.acceleration);
//charge.velocity = project_onto_plane(charge.velocity, charge.position);
charge.position = charge.position.add(charge.velocity);
charge.position.normalize();
}
}
function project_onto_unit_vector(v, unit_vector) {
let size = p5.Vector.dot(v, unit_vector);
return p5.Vector.mult(unit_vector, size);
}
/// Project `v` onto the plane normal to `unit_vector`
function project_onto_plane(v, unit_vector) {
let v_proj = project_onto_unit_vector(v, unit_vector);
return v.sub(v_proj)
}
function make_charges(n) {
charges = [];
for (let i = 0; i < n; i += 1) {