/** * Überprüft auf eine Kollision * Return: diff = neues Struct direkt zum Ziel * return: 0 wenn keine Kollision, 1 sonst */ uint8_t calc_Offroad(gps_reducedData_t* diff, gps_reducedData_t* own, gps_reducedData_t* target){ int16_t xCollision, yCollision; tree_init(CoordinatesToMap(own->x), CoordinatesToMap(own->y)); if (calc_reachability(&xCollision, &yCollision,CoordinatesToMap(own->x), CoordinatesToMap(own->y),CoordinatesToMap(target->x), CoordinatesToMap(target->y)) == 0){ setCoordinates(diff, target->cam_id, target->tag_id, target->x, target->y, target->angle, target->isWorld); return 0; } else{ scan_Obstacles(xCollision, yCollision, own, target, CoordinatesToMap(own->x), CoordinatesToMap(own->y)); //übergibt hier die Kollisionskoordinaten } return 1; }
/** Search for a path between two nodes. * This function executes an A* search to find an (optimal) path * from node @p from to node @p to. * @param from node to search from * @param to goal node * @param estimate_func function to estimate the cost from any node to the goal. * Note that the estimate function must be admissible for optimal A* search. That * means that for no query may the calculated estimate be higher than the actual * cost. * @param cost_func function to calculate the cost from a node to another adjacent * node. Note that the cost function is directly related to the estimate function. * For example, the cost can be calculated in terms of distance between nodes, or in * time that it takes to travel from one node to the other. The estimate function must * match the cost function to be admissible. * @param use_constraints true to respect constraints imposed by the constraint * repository, false to ignore the repository searching as if there were no * constraints whatsoever. * @param compute_constraints if true re-compute constraints, otherwise use constraints * as-is, for example if they have been computed before to check for changes. * @return ordered vector of nodes which denote a path from @p from to @p to. * Note that the vector is empty if no path could be found (i.e. there is non * or it was prohibited when using constraints. */ fawkes::NavGraphPath NavGraph::search_path(const NavGraphNode &from, const NavGraphNode &to, navgraph::EstimateFunction estimate_func, navgraph::CostFunction cost_func, bool use_constraints, bool compute_constraints) { if (! reachability_calced_) calc_reachability(); AStar astar; std::vector<AStarState *> a_star_solution; if (use_constraints) { constraint_repo_.lock(); if (compute_constraints && constraint_repo_->has_constraints()) { constraint_repo_->compute(); } NavGraphSearchState *initial_state = new NavGraphSearchState(from, to, this, estimate_func, cost_func, *constraint_repo_); a_star_solution = astar.solve(initial_state); constraint_repo_.unlock(); } else { NavGraphSearchState *initial_state = new NavGraphSearchState(from, to, this, estimate_func, cost_func); a_star_solution = astar.solve(initial_state); } std::vector<fawkes::NavGraphNode> path(a_star_solution.size()); NavGraphSearchState *solstate; for (unsigned int i = 0; i < a_star_solution.size(); ++i ) { solstate = dynamic_cast<NavGraphSearchState *>(a_star_solution[i]); path[i] = solstate->node(); } float cost = (! a_star_solution.empty()) ? a_star_solution[a_star_solution.size() - 1]->total_estimated_cost : -1; return NavGraphPath(this, path, cost); }
/** * Findet die 2 (Rand)Koordinaten die das Hindernis aus Sicht des Autos abgrenzen. Findet von dort einen Weg zum Ziel */ void scan_Obstacles(int8_t xCollision, int8_t yCollision, gps_reducedData_t* own, gps_reducedData_t* target, int8_t x_old, int8_t y_old){ int16_t x_freeL, y_freeL, x_freeR, y_freeR; int8_t xleft = -1, yleft = -1, xright = -1, yright = -1; //positiver Pfad //Annäherung an Hindernis von unten if(get_coord_obstacle(xCollision, yCollision-1) == 0 && (get_coord_obstacle(xCollision-1, yCollision) == 1 || get_coord_obstacle(xCollision+1, yCollision) == 1)){ move_AroundHorizontal( &xleft, &xright, &yleft, &yright, xCollision, yCollision, 1); if (xleft >= 0 && yleft >= 0){ if (calc_reachability(&x_freeL, &y_freeL,CoordinatesToMap(own->x), CoordinatesToMap(own->y), xleft, yleft) == 1){ x_freeL = xCollision; y_freeL = yCollision; //von Hinderniskante zu Auto ist kein direkter Weg möglich. Nehme zwischeschritt } } if (xright >= 0 && yright >= 0){ if (calc_reachability(&x_freeR, &y_freeR, CoordinatesToMap(own->x), CoordinatesToMap(own->y), xright, yright) == 1){ x_freeR = xCollision; y_freeR = yCollision; } } } else //Annäherung an Hindernis von oben if(get_coord_obstacle(xCollision, yCollision-1) != 0 && get_coord_obstacle(xCollision,yCollision+1) == 0 && (get_coord_obstacle(xCollision-1, yCollision) == 1 || get_coord_obstacle(xCollision+1, yCollision) == 1)){ move_AroundHorizontal( &xleft, &xright, &yleft, &yright, xCollision, yCollision, -1); // -1 = Hindernis von oben if (xleft >= 0 && yleft >= 0){ if (calc_reachability(&x_freeL, &y_freeL,CoordinatesToMap(own->x), CoordinatesToMap(own->y), xleft, yleft) == 1){ x_freeL = xCollision; y_freeL = yCollision; //von Hinderniskante zu Auto ist kein direkter Weg möglich. Nehme zwischeschritt } } if (xright >= 0 && yright >= 0){ if (calc_reachability(&x_freeR, &y_freeR, CoordinatesToMap(own->x), CoordinatesToMap(own->y), xright, yright) == 1){ x_freeR = xCollision; y_freeR = yCollision; } } } else //Sonderfall senkrechtes Hindernis if((get_coord_obstacle(xCollision, yCollision-1) != 0 && get_coord_obstacle(xCollision,yCollision+1) == 1) || isEcke(xCollision,yCollision) == 1 ){ //Überpürung ob Weg Rechts oder Links vom Hinderniss if (get_coord_obstacle(xCollision-1, yCollision) == 0 || get_coord_obstacle(xCollision-1, yCollision-1) == 0 || get_coord_obstacle(xCollision-1, yCollision +1) == 0){ move_AroundVertical( &xleft, &xright, &yleft, &yright, xCollision, yCollision, 1); //Links x_freeL = 1; } else if (get_coord_obstacle(xCollision+1, yCollision) == 0 || get_coord_obstacle(xCollision+1, yCollision-1) == 0 || get_coord_obstacle(xCollision+1, yCollision +1) == 0) move_AroundVertical( &xleft, &xright, &yleft, &yright, xCollision, yCollision, -1); if (xleft >= 0 && yleft >= 0){ if (calc_reachability(&x_freeL, &y_freeL,CoordinatesToMap(own->x), CoordinatesToMap(own->y), xleft, yleft) == 1){ x_freeL = xCollision; y_freeL = yCollision; } } if (xright >= 0 && yright >= 0){ if (calc_reachability(&x_freeR, &y_freeR, CoordinatesToMap(own->x), CoordinatesToMap(own->y), xright, yright) == 1){ x_freeR = xCollision; y_freeR = yCollision; } } } //hier neue Zwischenpunkte abspeichern if(xleft >= 0 && yleft >= 0 ){ if(x_freeL == xCollision){ tree_insert(x_freeL, y_freeL, x_old, y_old, 1); //zwischenschritt vom zwischenschritt abspeichern tree_insert(xleft,yleft,x_freeL,y_freeL, 1); } else tree_insert(xleft,yleft,x_old,y_old,1); //ansonsten nur die neuen Koordinaten abspeichern //Prüfen ob Ziel bereits direkt erreichbar if (calc_reachability(&x_freeL, &y_freeL, xleft, yleft, CoordinatesToMap(target->x), CoordinatesToMap(target->y)) == 0){ // In diesem Fall ist das Ziel erreicht tree_insert(CoordinatesToMap(target->x), CoordinatesToMap(target->y), xleft,yleft,1); return; } //Hier berechnen wie Dick das Hinderniss ist und gleich neuen Wegpunkt abspeichern -> reduziert Anzahl rekursiver Aufrufe if(find_Pos_Depth(&x_freeL, &y_freeL, xleft, yleft) == 1){ tree_insert(x_freeL,y_freeL,xleft,yleft,1); xleft = x_freeL; yleft = y_freeL; } if (calc_reachability(&x_freeL, &y_freeL, xleft, yleft, CoordinatesToMap(target->x), CoordinatesToMap(target->y)) == 0){ // In diesem Fall ist das Ziel erreicht tree_insert(CoordinatesToMap(target->x), CoordinatesToMap(target->y), xleft,yleft,1); } else{ setCoordinates(own, own->cam_id,own->tag_id,MapToCoordinates(xleft),MapToCoordinates(yleft),own->angle,own->isWorld); scan_Obstacles(x_freeL, y_freeL, own, target, xleft, yleft); } } if(xright >= 0 && yright >= 0){ if(x_freeR == xCollision){ tree_insert(x_freeR, y_freeR, x_old, y_old, 0); //zwischenschritt vom zwischenschritt abspeichern tree_insert(xright,yright,x_freeR,y_freeR, 0); } else tree_insert(xright,yright,x_old,y_old,0); if (calc_reachability(&x_freeR, &y_freeR, xright, yright, CoordinatesToMap(target->x), CoordinatesToMap(target->y)) == 0){ tree_insert(CoordinatesToMap(target->x), CoordinatesToMap(target->y), xright,yright,0); return; } if(find_Pos_Depth(&x_freeR, &y_freeR, xright, yright) == 1){ tree_insert(x_freeR,y_freeR,xright,yright,0); xright = x_freeR; yright = y_freeR; } if (calc_reachability(&x_freeR, &y_freeR, xright, yright, CoordinatesToMap(target->x), CoordinatesToMap(target->y)) == 0){ tree_insert(CoordinatesToMap(target->x), CoordinatesToMap(target->y), xright,yright,0); } else{ setCoordinates(own, own->cam_id,own->tag_id,MapToCoordinates(xright),MapToCoordinates(yright),own->angle,own->isWorld); scan_Obstacles(x_freeR, y_freeR, own, target, xright, yright); } } return; //toter Pfad, wird nicht mehr zur Zielfindung benötigt }
/** * SensorRange = einschränkung der Reichweite. Verhindert unnötig lange Berechnung * Return: Distance */ uint16_t driven_before(int8_t type, uint16_t SensorRange) { double diffR; #ifdef CARTOGRAPHY_SCENARIO gps_reducedData_t *own; uint16_t angle, diffL; int16_t xCollision = 0, yCollision = 0, ownX, ownY; int32_t newX, newY; //Aktuelle Orientierung beachten!!! Orientierung in Abhängigkeit der Fahrzeugorientierung und dem aktuell betrachteten Sensor own = get_ownCoords(); switch(type) { case RIGHT_SENSOR: angle = AngleMinus(own->angle, 16383); if (SensorRange > RANGESIDE*2) SensorRange = RANGESIDE*2; //siehe Anforderungen in wallFollow für align = 2 break; case LEFT_SENSOR: angle = AnglePlus(own->angle, 16383); if (SensorRange > RANGESIDE*2) SensorRange = RANGESIDE*2;//siehe Anforderungen in wallFollow für align = 2 break; case FRONT_SENSOR: angle = own->angle; if (SensorRange > RANGESIDE*2) SensorRange = RANGESIDE*2; break; default: angle = own->angle; break; } SensorRange = SensorRange / 5; ownX = CoordinatesToMap(own->x); ownY = CoordinatesToMap(own->y); if (Sema != NULL) { while ( xSemaphoreTake( Sema, ( portTickType ) 10 ) != pdTRUE ) { os_wait(10); } newX = (SensorRange*cos_Taylor(uint16DegreeRelativeToX(angle)))/100 + ownX; ownX = (2*cos_Taylor(uint16DegreeRelativeToX(angle)))/100 + ownX; //Ein stück aus dem Urpsrung rausgehen newY = (SensorRange*sin_Taylor(uint16DegreeRelativeToX(angle)))/100 + ownY; ownY = (2*sin_Taylor(uint16DegreeRelativeToX(angle)))/100 + ownY; //gibt es ein bereits befahrenes Gebiet/Hindernis das zwischen Sensorwert und Auto liegt? diffL = calc_reachability(&xCollision, &yCollision, ownX, ownY, (int16_t)newX, (int16_t)newY); xSemaphoreGive(Sema); } else return 600; //600 = max. Sensorreichweite if (diffL == 1) { diffR = sqrt(abs16(ownX - xCollision)*abs16(ownX - xCollision) + abs16(ownY - yCollision)*abs16(ownY - yCollision)); diffR = diffR*5; if (diffR < 100) { Seg_Hex(0x00); } else Seg_Hex(0x01); } else { diffR = 600; // 600 für nichts gefunden } if (diffR > 600) diffR = 600; #endif return (uint16_t) diffR; }