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more meaningful variable names in elastic collision for balls

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This commit is contained in:
Antonio Carzaniga 2022-06-01 13:06:55 +02:00
parent 7064eb5174
commit 4725f1eb6a
1 changed files with 4 additions and 4 deletions
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8
balls.cc
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@ -86,16 +86,16 @@ void ball_update_state (ball * p) {
} }
void ball_elastic_collision (ball * p, ball * q) { void ball_elastic_collision (ball * p, ball * q) {
vec2d dp = q->position - p->position; vec2d pq = q->position - p->position;
double d2 = vec2d::dot(dp,dp); double d2 = vec2d::dot(pq,pq);
double r = p->radius + q->radius; double r = p->radius + q->radius;
if (d2 <= r*r) { if (d2 <= r*r) {
vec2d dv = q->velocity - p->velocity; vec2d pq_v = q->velocity - p->velocity;
double mp = p->radius * p->radius; double mp = p->radius * p->radius;
double mq = q->radius * q->radius; double mq = q->radius * q->radius;
double f = vec2d::dot(dv,dp); double f = vec2d::dot(pq_v, pq);
if (f < 0) { if (f < 0) {
f /= d2*(mp + mq); f /= d2*(mp + mq);