3 This file is part of the MSP Märklin suite
4 Copyright © 2010 Mikkosoft Productions, Mikko Rasa
5 Distributed under the GPL
12 #include "tracktype.h"
14 #include "vehicletype.h"
21 Vehicle::Vehicle(Layout &l, const VehicleType &t):
27 bogie_dirs(type.get_bogies().size())
29 layout.add_vehicle(*this);
38 layout.remove_vehicle(*this);
41 void Vehicle::attach_back(Vehicle &veh)
44 throw InvalidState("Already attached");
50 void Vehicle::attach_front(Vehicle &veh)
53 throw InvalidState("Already attached");
59 void Vehicle::detach_back()
62 throw InvalidState("Not attached");
68 void Vehicle::detach_front()
71 throw InvalidState("Not attached");
77 void Vehicle::place(Track *t, unsigned e, float o, PlaceMode m)
79 track_pos = TrackPosition(t, e, o);
83 float front = type.get_length()/2;
84 if(!type.get_axles().empty())
85 front = type.get_axles().front().position;
86 if(!type.get_bogies().empty())
88 const VehicleType::Bogie &bogie = type.get_bogies().front();
89 front = max(front, bogie.position+bogie.axles.front().position);
91 track_pos.advance(-front);
93 else if(m==FRONT_BUFFER)
94 track_pos.advance(-type.get_length()/2);
97 float back = type.get_length()/2;
98 if(!type.get_axles().empty())
99 back = type.get_axles().back().position;
100 if(!type.get_bogies().empty())
102 const VehicleType::Bogie &bogie = type.get_bogies().back();
103 back = min(back, bogie.position+bogie.axles.back().position);
105 track_pos.advance(-back);
107 else if(m==BACK_BUFFER)
108 track_pos.advance(type.get_length()/2);
111 propagate_position();
114 void Vehicle::advance(float d)
116 track_pos.advance(d);
118 propagate_position();
121 float Vehicle::get_bogie_direction(unsigned i) const
123 if(i>=bogie_dirs.size())
124 throw InvalidParameterValue("Bogie index out of range");
125 return bogie_dirs[i];
128 void Vehicle::update_position()
132 const vector<VehicleType::Axle> &axles = type.get_axles();
135 float wheelbase = axles.front().position-axles.back().position;
136 tp = get_point(track_pos, wheelbase, -axles.back().position/wheelbase);
140 const vector<VehicleType::Bogie> &bogies = type.get_bogies();
143 TrackPosition front = track_pos;
144 front.advance(bogies.front().position);
145 TrackPosition back = track_pos;
146 back.advance(bogies.back().position);
147 float bogie_spacing = bogies.front().position-bogies.back().position;
148 adjust_for_distance(front, back, bogie_spacing);
150 const vector<VehicleType::Axle> &front_axles = bogies.front().axles;
151 float wheelbase = front_axles.front().position-front_axles.back().position;
152 TrackPoint front_point = get_point(front, wheelbase, -front_axles.back().position/wheelbase);
154 const vector<VehicleType::Axle> &back_axles = bogies.back().axles;
155 wheelbase = back_axles.front().position-back_axles.back().position;
156 TrackPoint back_point = get_point(back, wheelbase, -back_axles.back().position/wheelbase);
158 tp = get_point(front_point.pos, back_point.pos, -bogies.back().position/bogie_spacing);
160 bogie_dirs.front() = front_point.dir-tp.dir;
161 bogie_dirs.back() = back_point.dir-tp.dir;
164 tp = track_pos.get_point();
171 void Vehicle::update_position_from(const Vehicle &veh)
173 int sign = (&veh==prev ? -1 : 1);
175 float tdist = (type.get_length()+veh.type.get_length())/2;
176 float margin = layout.get_catalogue().get_scale();
178 float dist = distance(veh.position, position);
179 if(dist<tdist-margin || dist>tdist+margin)
181 track_pos = veh.track_pos;
182 track_pos.advance(sign*tdist);
185 dist = distance(veh.position, position);
188 track_pos.advance(sign*(tdist-dist));
192 void Vehicle::propagate_position()
197 propagate_backward();
200 void Vehicle::propagate_forward()
202 prev->update_position_from(*this);
205 prev->propagate_forward();
208 void Vehicle::propagate_backward()
210 next->update_position_from(*this);
213 next->propagate_backward();
216 void Vehicle::adjust_for_distance(TrackPosition &front, TrackPosition &back, float tdist, float ratio) const
218 float margin = 0.01*layout.get_catalogue().get_scale();
222 Point front_point = front.get_point().pos;
223 Point back_point = back.get_point().pos;
225 float dx = front_point.x-back_point.x;
226 float dy = front_point.y-back_point.y;
227 float dz = front_point.z-back_point.z;
228 float dist = sqrt(dx*dx+dy*dy+dz*dz);
230 float diff = tdist-dist;
231 if(diff<-margin && adjust_dir<=0)
236 else if(diff>margin && adjust_dir>=0)
244 front.advance(diff*(1-ratio));
245 back.advance(-diff*ratio);
249 TrackPoint Vehicle::get_point(const Point &front, const Point &back, float ratio) const
251 float dx = front.x-back.x;
252 float dy = front.y-back.y;
253 float dz = front.z-back.z;
256 tp.pos = Point(back.x+dx*ratio, back.y+dy*ratio, back.z+dz*ratio);
257 tp.dir = atan2(dy, dx);
262 TrackPoint Vehicle::get_point(const TrackPosition &pos, float tdist, float ratio) const
264 TrackPosition front = pos;
265 front.advance(tdist*(1-ratio));
267 TrackPosition back = pos;
268 back.advance(-tdist*ratio);
270 adjust_for_distance(front, back, tdist, ratio);
271 return get_point(front.get_point().pos, back.get_point().pos, ratio);
275 Vehicle::TrackPosition::TrackPosition():
281 Vehicle::TrackPosition::TrackPosition(Track *t, unsigned e, float o):
287 void Vehicle::TrackPosition::advance(float d)
292 unsigned path = track->get_active_path();
295 float path_len = track->get_type().get_path_length(path);
296 while(track && offs>=path_len)
298 unsigned out = track->traverse(ep, path);
299 Track *next = track->get_link(out);
303 ep = next->get_endpoint_by_link(*track);
307 path = track->get_active_path();
308 path_len = track->get_type().get_path_length(path);
314 while(track && offs<0)
316 Track *prev = track->get_link(ep);
319 unsigned in = prev->get_endpoint_by_link(*track);
322 path = track->get_active_path();
323 ep = track->traverse(in, path);
325 path_len = track->get_type().get_path_length(path);
339 TrackPoint Vehicle::TrackPosition::get_point() const
342 return track->get_point(ep, offs);
347 } // namespace Marklin