last_x            290 core/gps_math.c     rcb->last_x     = 0.0;
last_x            333 core/gps_math.c         rcb->last_x     = x;
last_x            367 core/gps_math.c     return rcb->last_x * rcb->s + rcb->t;
last_x             67 core/gps_math.h     double last_x;