karma/flying-balls
1
1
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

more meaningful variable names in elastic collision for balls

Browse Source
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
balls.cc
View File

@ -86,16 +86,16 @@ void ball_update_state (ball * p) {
}
void ball_elastic_collision (ball * p, ball * q) {
vec2d dp = q->position - p->position;
double d2 = vec2d::dot(dp,dp);
vec2d pq = q->position - p->position;
double d2 = vec2d::dot(pq,pq);
double r = p->radius + q->radius;
if (d2 <= r*r) {
vec2d dv = q->velocity - p->velocity;
vec2d pq_v = q->velocity - p->velocity;
double mp = p->radius * p->radius;
double mq = q->radius * q->radius;
double f = vec2d::dot(dv,dp);
double f = vec2d::dot(pq_v, pq);
if (f < 0) {
f /= d2*(mp + mq);