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();
44 float c = cos(-angle);
45 float s = sin(-angle);
47 minp.x = maxp.x = c*pos.x-s*pos.y;
48 minp.y = maxp.y = s*pos.x+c*pos.y;
50 float c2 = cos(rot-angle);
51 float s2 = sin(rot-angle);
53 for(vector<Point>::const_iterator i=border.begin(); i!=border.end(); ++i)
55 float x = c*pos.x-s*pos.y + c2*i->x-s2*i->y;
56 float y = s*pos.x+c*pos.y + s2*i->x+c2*i->y;
58 minp.x = min(minp.x, x);
59 minp.y = min(minp.y, y);
60 maxp.x = max(maxp.x, x);
61 maxp.y = max(maxp.y, y);
65 void Track3D::render() const
69 glPushName(reinterpret_cast<unsigned>(this));
72 glColor4f(0.25*color.r, 0.25*color.g, 0.25*color.b, 1);
73 glDrawElements(GL_QUADS, base_seq.size(), GL_UNSIGNED_INT, &base_seq[0]);
76 glColor4f(0.85*color.r, 0.85*color.g, 0.85*color.b, 1);
77 glDrawElements(GL_QUADS, rail_seq.size(), GL_UNSIGNED_INT, &rail_seq[0]);
84 void Track3D::render_endpoints() const
86 prepare_render(false);
88 const vector<Endpoint> &endpoints = track.get_type().get_endpoints();
89 for(unsigned i=0; i<endpoints.size(); ++i)
91 const Endpoint &ep = endpoints[i];
92 GL::set(GL_CULL_FACE, track.get_link(i));
94 glColor4f(0.5, 0, 1, 0.5);
96 glColor4f(1, 0, 0.5, 0.5);
98 float c = cos(ep.dir);
99 float s = sin(ep.dir);
100 float z = (i==1 ? track.get_slope() : 0);
103 glVertex3f(ep.pos.x-s*0.025, ep.pos.y+c*0.025, z);
104 glVertex3f(ep.pos.x+s*0.025, ep.pos.y-c*0.025, z);
105 glVertex3f(ep.pos.x+s*0.025, ep.pos.y-c*0.025, z+0.02);
106 glVertex3f(ep.pos.x-s*0.025, ep.pos.y+c*0.025, z+0.02);
110 if(abs(track.get_slope())>1e-4)
113 if(track.get_slope()>0)
115 p = endpoints[1].pos;
116 p.z += track.get_slope();
119 p = endpoints[0].pos;
120 glBegin(GL_TRIANGLE_STRIP);
121 for(unsigned i=0; i<=16; ++i)
123 float c = cos(i*M_PI/8);
124 float s = sin(i*M_PI/8);
126 glVertex3f(p.x+c*0.01, p.y+s*0.01, p.z);
127 glVertex3f(p.x+c*0.01, p.y+s*0.01, -track.get_position().z);
135 void Track3D::render_path(int path) const
137 prepare_render(true);
140 if(path>=0 && static_cast<unsigned>(path)<path_seq.size())
141 glDrawElements(GL_QUADS, path_seq[path].size(), GL_UNSIGNED_INT, &path_seq[path][0]);
144 for(unsigned i=0; i<path_seq.size(); ++i)
145 glDrawElements(GL_QUADS, path_seq[i].size(), GL_UNSIGNED_INT, &path_seq[i][0]);
151 void Track3D::prepare_render(bool slope) const
153 const Point &pos = track.get_position();
154 float rot = track.get_rotation();
157 glTranslatef(pos.x, pos.y, pos.z);
158 glRotatef(rot*180/M_PI, 0, 0, 1);
160 glRotatef(track.get_slope()/track.get_type().get_total_length()*180/M_PI, 0, -1, 0);
163 void Track3D::build_object()
166 GL::VertexArrayBuilder builder(varray);
171 path_seq.resize(track.get_type().get_n_paths());
173 const vector<TrackPart> &parts = track.get_type().get_parts();
175 for(vector<TrackPart>::const_iterator i=parts.begin(); i!=parts.end(); ++i)
176 build_part(*i, builder, index);
179 void Track3D::build_part(const TrackPart &part, GL::VertexArrayBuilder &va_builder, unsigned &base_index)
181 static vector<Point> profile;
184 profile.push_back(Point(0, -0.02, 0));
185 profile.push_back(Point(0, -0.014, 0.008));
186 profile.push_back(Point(0, -0.014, 0.008));
187 profile.push_back(Point(0, 0.014, 0.008));
188 profile.push_back(Point(0, 0.014, 0.008));
189 profile.push_back(Point(0, 0.02, 0));
190 for(unsigned i=0; i<2; ++i)
192 profile.push_back(Point(0, -0.009+i*0.017, 0.008));
193 profile.push_back(Point(0, -0.009+i*0.017, 0.0103));
194 profile.push_back(Point(0, -0.009+i*0.017, 0.0103));
195 profile.push_back(Point(0, -0.008+i*0.017, 0.0103));
196 profile.push_back(Point(0, -0.008+i*0.017, 0.0103));
197 profile.push_back(Point(0, -0.008+i*0.017, 0.008));
199 profile.push_back(Point(0, -0.002, 0.012));
200 profile.push_back(Point(0, 0.002, 0.012));
202 static unsigned psize = profile.size();
204 unsigned nsegs = (part.radius ? static_cast<unsigned>(part.length*(1<<quality))+1 : 1);
205 float plen = part.length;
207 plen *= abs(part.radius);
209 for(unsigned i=0; i<=nsegs; ++i)
211 float a = part.dir+(part.radius ? i*plen/nsegs/part.radius : 0);
214 Point p = part.get_point(i*plen/nsegs);
216 for(unsigned j=0; j<psize; ++j)
219 float dy = profile[k+1].y-profile[k].y;
220 float dz = profile[k+1].z-profile[k].z;
221 float d = sqrt(dy*dy+dz*dz);
222 va_builder.normal(s*dz/d, -c*dz/d, dy/d);
224 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);
225 va_builder.vertex(v.x, v.y, v.z);
231 for(unsigned i=0; i<nsegs; ++i)
233 for(unsigned j=0; j<3; ++j)
235 base_seq.push_back(base_index+i*psize+j*2);
236 base_seq.push_back(base_index+(i+1)*psize+j*2);
237 base_seq.push_back(base_index+(i+1)*psize+1+j*2);
238 base_seq.push_back(base_index+i*psize+1+j*2);
240 for(unsigned j=3; j<9; ++j)
242 rail_seq.push_back(base_index+i*psize+j*2);
243 rail_seq.push_back(base_index+(i+1)*psize+j*2);
244 rail_seq.push_back(base_index+(i+1)*psize+1+j*2);
245 rail_seq.push_back(base_index+i*psize+1+j*2);
247 path_seq[part.path].push_back(base_index+i*psize+18);
248 path_seq[part.path].push_back(base_index+(i+1)*psize+18);
249 path_seq[part.path].push_back(base_index+(i+1)*psize+19);
250 path_seq[part.path].push_back(base_index+i*psize+19);
253 base_index += (nsegs+1)*psize;
256 } // namespace Marklin