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):
28 layout.add_vehicle(*this);
33 layout.remove_vehicle(*this);
36 void Vehicle::attach_back(Vehicle &veh)
39 throw InvalidState("Already attached");
45 void Vehicle::attach_front(Vehicle &veh)
48 throw InvalidState("Already attached");
54 void Vehicle::detach_back()
57 throw InvalidState("Not attached");
63 void Vehicle::detach_front()
66 throw InvalidState("Not attached");
72 void Vehicle::place(Track *t, unsigned e, float o, PlaceMode m)
74 track_pos = TrackPosition(t, e, o);
78 float front = type.get_length()/2;
79 if(!type.get_axles().empty())
80 front = type.get_axles().front().position;
81 if(!type.get_bogies().empty())
83 const VehicleType::Bogie &bogie = type.get_bogies().front();
84 front = max(front, bogie.position+bogie.axles.front().position);
86 track_pos.advance(-front);
88 else if(m==FRONT_BUFFER)
89 track_pos.advance(-type.get_length()/2);
92 float back = type.get_length()/2;
93 if(!type.get_axles().empty())
94 back = type.get_axles().back().position;
95 if(!type.get_bogies().empty())
97 const VehicleType::Bogie &bogie = type.get_bogies().back();
98 back = min(back, bogie.position+bogie.axles.back().position);
100 track_pos.advance(-back);
102 else if(m==BACK_BUFFER)
103 track_pos.advance(type.get_length()/2);
106 propagate_position();
109 void Vehicle::advance(float d)
111 track_pos.advance(d);
113 propagate_position();
116 void Vehicle::update_position()
120 const vector<VehicleType::Axle> &axles = type.get_axles();
123 float wheelbase = axles.front().position-axles.back().position;
124 tp = get_point(track_pos, wheelbase, -axles.back().position/wheelbase);
128 const vector<VehicleType::Bogie> &bogies = type.get_bogies();
131 TrackPosition front = track_pos;
132 front.advance(bogies.front().position);
133 TrackPosition back = track_pos;
134 back.advance(bogies.back().position);
135 float bogie_spacing = bogies.front().position-bogies.back().position;
136 adjust_for_distance(front, back, bogie_spacing);
138 const vector<VehicleType::Axle> &front_axles = bogies.front().axles;
139 float wheelbase = front_axles.front().position-front_axles.back().position;
140 Point front_point = get_point(front, wheelbase, -front_axles.back().position/wheelbase).pos;
142 const vector<VehicleType::Axle> &back_axles = bogies.back().axles;
143 wheelbase = back_axles.front().position-back_axles.back().position;
144 Point back_point = get_point(back, wheelbase, -back_axles.back().position/wheelbase).pos;
146 tp = get_point(front_point, back_point, -bogies.back().position/bogie_spacing);
149 tp = track_pos.get_point();
156 void Vehicle::update_position_from(const Vehicle &veh)
158 int sign = (&veh==prev ? -1 : 1);
160 float tdist = (type.get_length()+veh.type.get_length())/2;
161 float margin = layout.get_catalogue().get_scale();
163 float dist = distance(veh.position, position);
164 if(dist<tdist-margin || dist>tdist+margin)
166 track_pos = veh.track_pos;
167 track_pos.advance(sign*tdist);
170 dist = distance(veh.position, position);
173 track_pos.advance(sign*(tdist-dist));
177 void Vehicle::propagate_position()
182 propagate_backward();
185 void Vehicle::propagate_forward()
187 prev->update_position_from(*this);
190 prev->propagate_forward();
193 void Vehicle::propagate_backward()
195 next->update_position_from(*this);
198 next->propagate_backward();
201 void Vehicle::adjust_for_distance(TrackPosition &front, TrackPosition &back, float tdist, float ratio) const
203 float margin = 0.01*layout.get_catalogue().get_scale();
207 Point front_point = front.get_point().pos;
208 Point back_point = back.get_point().pos;
210 float dx = front_point.x-back_point.x;
211 float dy = front_point.y-back_point.y;
212 float dz = front_point.z-back_point.z;
213 float dist = sqrt(dx*dx+dy*dy+dz*dz);
215 float diff = tdist-dist;
216 if(diff<-margin && adjust_dir<=0)
221 else if(diff>margin && adjust_dir>=0)
229 front.advance(diff*(1-ratio));
230 back.advance(-diff*ratio);
234 TrackPoint Vehicle::get_point(const Point &front, const Point &back, float ratio) const
236 float dx = front.x-back.x;
237 float dy = front.y-back.y;
238 float dz = front.z-back.z;
241 tp.pos = Point(back.x+dx*ratio, back.y+dy*ratio, back.z+dz*ratio);
242 tp.dir = atan2(dy, dx);
247 TrackPoint Vehicle::get_point(const TrackPosition &pos, float tdist, float ratio) const
249 TrackPosition front = pos;
250 front.advance(tdist*(1-ratio));
252 TrackPosition back = pos;
253 back.advance(-tdist*ratio);
255 adjust_for_distance(front, back, tdist, ratio);
256 return get_point(front.get_point().pos, back.get_point().pos, ratio);
260 Vehicle::TrackPosition::TrackPosition():
266 Vehicle::TrackPosition::TrackPosition(Track *t, unsigned e, float o):
272 void Vehicle::TrackPosition::advance(float d)
277 unsigned path = track->get_active_path();
280 float path_len = track->get_type().get_path_length(path);
281 while(track && offs>=path_len)
283 unsigned out = track->traverse(ep, path);
284 Track *next = track->get_link(out);
288 ep = next->get_endpoint_by_link(*track);
292 path = track->get_active_path();
293 path_len = track->get_type().get_path_length(path);
299 while(track && offs<0)
301 Track *prev = track->get_link(ep);
304 unsigned in = prev->get_endpoint_by_link(*track);
307 path = track->get_active_path();
308 ep = track->traverse(in, path);
310 path_len = track->get_type().get_path_length(path);
324 TrackPoint Vehicle::TrackPosition::get_point() const
327 return track->get_point(ep, offs);
332 } // namespace Marklin