3 This file is part of the MSP Märklin suite
4 Copyright © 2006-2009 Mikkosoft Productions, Mikko Rasa
5 Distributed under the GPL
10 #include <msp/gl/misc.h>
11 #include "libmarklin/tracktype.h"
19 Track3D::Track3D(Track &t, unsigned q):
22 varray((GL::NORMAL3, GL::VERTEX3)),
28 void Track3D::set_color(const Msp::GL::Color &c)
33 void Track3D::set_quality(unsigned q)
39 void Track3D::get_bounds(float angle, Point &minp, Point &maxp) const
41 const Point &pos = track.get_position();
42 float rot = track.get_rotation();
43 float slope = track.get_slope();
45 float c = cos(-angle);
46 float s = sin(-angle);
48 minp.x = maxp.x = c*pos.x-s*pos.y;
49 minp.y = maxp.y = s*pos.x+c*pos.y;
50 minp.z = pos.z+min(slope, 0.0f);
51 maxp.z = pos.z+0.01+max(slope, 0.0f);
53 float c2 = cos(rot-angle);
54 float s2 = sin(rot-angle);
56 for(vector<Point>::const_iterator i=border.begin(); i!=border.end(); ++i)
58 float x = c*pos.x-s*pos.y + c2*i->x-s2*i->y;
59 float y = s*pos.x+c*pos.y + s2*i->x+c2*i->y;
61 minp.x = min(minp.x, x);
62 minp.y = min(minp.y, y);
63 maxp.x = max(maxp.x, x);
64 maxp.y = max(maxp.y, y);
68 void Track3D::render() const
72 glPushName(reinterpret_cast<unsigned>(this));
75 glColor4f(0.25*color.r, 0.25*color.g, 0.25*color.b, 1);
76 glDrawElements(GL_QUADS, base_seq.size(), GL_UNSIGNED_INT, &base_seq[0]);
79 glColor4f(0.85*color.r, 0.85*color.g, 0.85*color.b, 1);
80 glDrawElements(GL_QUADS, rail_seq.size(), GL_UNSIGNED_INT, &rail_seq[0]);
87 void Track3D::render_endpoints() const
89 prepare_render(false);
91 const vector<Endpoint> &endpoints = track.get_type().get_endpoints();
92 for(unsigned i=0; i<endpoints.size(); ++i)
94 const Endpoint &ep = endpoints[i];
95 GL::set(GL_CULL_FACE, track.get_link(i));
97 glColor4f(0.5, 0, 1, 0.5);
99 glColor4f(1, 0, 0.5, 0.5);
101 float c = cos(ep.dir);
102 float s = sin(ep.dir);
103 float z = (i==1 ? track.get_slope() : 0);
106 glVertex3f(ep.pos.x-s*0.025, ep.pos.y+c*0.025, z);
107 glVertex3f(ep.pos.x+s*0.025, ep.pos.y-c*0.025, z);
108 glVertex3f(ep.pos.x+s*0.025, ep.pos.y-c*0.025, z+0.02);
109 glVertex3f(ep.pos.x-s*0.025, ep.pos.y+c*0.025, z+0.02);
113 if(abs(track.get_slope())>1e-4)
116 if(track.get_slope()>0)
118 p = endpoints[1].pos;
119 p.z += track.get_slope();
122 p = endpoints[0].pos;
123 glBegin(GL_TRIANGLE_STRIP);
124 for(unsigned i=0; i<=16; ++i)
126 float c = cos(i*M_PI/8);
127 float s = sin(i*M_PI/8);
129 glVertex3f(p.x+c*0.01, p.y+s*0.01, p.z);
130 glVertex3f(p.x+c*0.01, p.y+s*0.01, -track.get_position().z);
138 void Track3D::render_path(int path) const
140 prepare_render(true);
143 if(path>=0 && static_cast<unsigned>(path)<path_seq.size())
144 glDrawElements(GL_QUADS, path_seq[path].size(), GL_UNSIGNED_INT, &path_seq[path][0]);
147 for(unsigned i=0; i<path_seq.size(); ++i)
148 glDrawElements(GL_QUADS, path_seq[i].size(), GL_UNSIGNED_INT, &path_seq[i][0]);
154 void Track3D::prepare_render(bool slope) const
156 const Point &pos = track.get_position();
157 float rot = track.get_rotation();
160 glTranslatef(pos.x, pos.y, pos.z);
161 glRotatef(rot*180/M_PI, 0, 0, 1);
163 glRotatef(track.get_slope()/track.get_type().get_total_length()*180/M_PI, 0, -1, 0);
166 void Track3D::build_object()
169 GL::VertexArrayBuilder builder(varray);
174 path_seq.resize(track.get_type().get_n_paths());
176 const vector<TrackPart> &parts = track.get_type().get_parts();
178 for(vector<TrackPart>::const_iterator i=parts.begin(); i!=parts.end(); ++i)
179 build_part(*i, builder, index);
182 void Track3D::build_part(const TrackPart &part, GL::VertexArrayBuilder &va_builder, unsigned &base_index)
184 static vector<Point> profile;
187 profile.push_back(Point(0, -0.02, 0));
188 profile.push_back(Point(0, -0.014, 0.008));
189 profile.push_back(Point(0, -0.014, 0.008));
190 profile.push_back(Point(0, 0.014, 0.008));
191 profile.push_back(Point(0, 0.014, 0.008));
192 profile.push_back(Point(0, 0.02, 0));
193 for(unsigned i=0; i<2; ++i)
195 profile.push_back(Point(0, -0.009+i*0.017, 0.008));
196 profile.push_back(Point(0, -0.009+i*0.017, 0.0103));
197 profile.push_back(Point(0, -0.009+i*0.017, 0.0103));
198 profile.push_back(Point(0, -0.008+i*0.017, 0.0103));
199 profile.push_back(Point(0, -0.008+i*0.017, 0.0103));
200 profile.push_back(Point(0, -0.008+i*0.017, 0.008));
202 profile.push_back(Point(0, -0.002, 0.012));
203 profile.push_back(Point(0, 0.002, 0.012));
205 static unsigned psize = profile.size();
207 unsigned nsegs = (part.radius ? static_cast<unsigned>(part.length*(1<<quality))+1 : 1);
208 float plen = part.length;
210 plen *= abs(part.radius);
212 for(unsigned i=0; i<=nsegs; ++i)
214 float a = part.dir+(part.radius ? i*plen/nsegs/part.radius : 0);
217 Point p = part.get_point(i*plen/nsegs);
219 for(unsigned j=0; j<psize; ++j)
222 float dy = profile[k+1].y-profile[k].y;
223 float dz = profile[k+1].z-profile[k].z;
224 float d = sqrt(dy*dy+dz*dz);
225 va_builder.normal(s*dz/d, -c*dz/d, dy/d);
227 Point v(p.x+c*profile[j].x-s*profile[j].y, p.y+c*profile[j].y+s*profile[j].x, profile[j].z);
228 va_builder.vertex(v.x, v.y, v.z);
234 for(unsigned i=0; i<nsegs; ++i)
236 for(unsigned j=0; j<3; ++j)
238 base_seq.push_back(base_index+i*psize+j*2);
239 base_seq.push_back(base_index+(i+1)*psize+j*2);
240 base_seq.push_back(base_index+(i+1)*psize+1+j*2);
241 base_seq.push_back(base_index+i*psize+1+j*2);
243 for(unsigned j=3; j<9; ++j)
245 rail_seq.push_back(base_index+i*psize+j*2);
246 rail_seq.push_back(base_index+(i+1)*psize+j*2);
247 rail_seq.push_back(base_index+(i+1)*psize+1+j*2);
248 rail_seq.push_back(base_index+i*psize+1+j*2);
250 path_seq[part.path].push_back(base_index+i*psize+18);
251 path_seq[part.path].push_back(base_index+(i+1)*psize+18);
252 path_seq[part.path].push_back(base_index+(i+1)*psize+19);
253 path_seq[part.path].push_back(base_index+i*psize+19);
256 base_index += (nsegs+1)*psize;
259 } // namespace Marklin