void trajectory_circle_rel(struct trajectory *traj, double x, double y,
double radius_mm, double rel_a_deg, uint8_t flags);
+/*
+ * Compute the fastest distance and angle speeds matching the radius
+ * from current traj_speed
+ */
+void circle_get_da_speed_from_radius(struct trajectory *traj,
+ double radius_mm,
+ double *speed_d,
+ double *speed_a);
+
/* do a line */
void trajectory_line_abs(struct trajectory *traj, double x1, double y1,
double x2, double y2, double advance);