Avert collision static detection rounding error (minetest#12822)

EleutherAI · Sep 30, 2022 · e832cee · e832cee
1 parent 6eb7d57
commit e832cee
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/src/collision.cpp b/src/collision.cpp
@@ -250,11 +250,12 @@ collisionMoveResult collisionMoveSimple(Environment *env, IGameDef *gamedef,
  time_notification_done = false;
  }
 
- v3f newpos_f = *pos_f + (*speed_f + accel_f * 0.5f * dtime) * dtime;
+ v3f dpos_f = (*speed_f + accel_f * 0.5f * dtime) * dtime;
+ v3f newpos_f = *pos_f + dpos_f;
  *speed_f += accel_f * dtime;
 
  // If the object is static, there are no collisions
- if (newpos_f == *pos_f)
+ if (dpos_f == v3f())
  return result;
 
  // Limit speed for avoiding hangs