in str/apps/src/Navigation.cpp [12:22]
bool Navigation::setLine(float _start_x, float _start_y, float _goal_x, float _goal_y){
if((_start_x == _goal_x) && (_start_y == _goal_y)){
return false;
}
current_x = start_x = _start_x;
current_y = start_y = _start_y;
goal_x = _goal_x;
goal_y = _goal_y;
return true;
}