source/3d/layout.cpp

   1 /* $Id$
   2
   3 This file is part of the MSP Märklin suite
   4 Copyright © 2006-2010 Mikkosoft Productions, Mikko Rasa
   5 Distributed under the GPL
   6 */
   7
   8 #include <algorithm>
   9 #include <limits>
  10 #include <msp/gl/clip.h>
  11 #include <msp/gl/matrix.h>
  12 #include <msp/gl/rendermode.h>
  13 #include <msp/gl/select.h>
  14 #include <msp/gl/texture.h>
  15 #include <msp/datafile/parser.h>
  16 #include "layout.h"
  17
  18 using namespace std;
  19 using namespace Msp;
  20
  21 namespace Marklin {
  22
  23 Layout3D::Layout3D(Layout &l):
  24         layout(l),
  25         catalogue(layout.get_catalogue())
  26 {
  27         layout.signal_track_added.connect(sigc::mem_fun(this, &Layout3D::track_added));
  28         layout.signal_track_removed.connect(sigc::mem_fun(this, &Layout3D::track_removed));
  29
  30         const set<Track *> &ltracks = layout.get_tracks();
  31         for(set<Track *>::iterator i=ltracks.begin(); i!=ltracks.end(); ++i)
  32                 track_added(**i);
  33 }
  34
  35 Layout3D::~Layout3D()
  36 {
  37         while(!tracks.empty())
  38                 delete tracks.front();
  39 }
  40
  41 void Layout3D::add_track(Track3D &t)
  42 {
  43         tracks.push_back(&t);
  44 }
  45
  46 void Layout3D::remove_track(Track3D &t)
  47 {
  48         list<Track3D *>::iterator i = find(tracks.begin(), tracks.end(), &t);
  49         if(i!=tracks.end())
  50                 tracks.erase(i);
  51 }
  52
  53 Track3D &Layout3D::get_track(const Track &t) const
  54 {
  55         for(list<Track3D *>::const_iterator i=tracks.begin(); i!=tracks.end(); ++i)
  56                 if(&(*i)->get_track()==&t)
  57                         return **i;
  58
  59         throw KeyError("Unknown track");
  60 }
  61
  62 Track3D *Layout3D::pick_track(float x, float y, float size) const
  63 {
  64         vector<GL::SelectRecord> select_buf;
  65         GL::select_buffer(select_buf);
  66         GL::render_mode(GL::SELECT);
  67
  68         {
  69                 GL::PushMatrix push_mat;
  70                 GL::load_identity();
  71
  72                 GL::ClipPlane(1, 0, x-size, 0).apply_to(0);
  73                 GL::ClipPlane(-1, 0, -x-size, 0).apply_to(1);
  74                 GL::ClipPlane(0, 1, y-size, 0).apply_to(2);
  75                 GL::ClipPlane(0, -1, -y-size, 0).apply_to(3);
  76         }
  77
  78         scene.render(0);
  79
  80         GL::ClipPlane::disable(0);
  81         GL::ClipPlane::disable(1);
  82         GL::ClipPlane::disable(2);
  83         GL::ClipPlane::disable(3);
  84
  85         GL::render_mode(GL::RENDER);
  86         Track3D *track = 0;
  87         unsigned track_depth = numeric_limits<unsigned>::max();
  88         for(vector<GL::SelectRecord>::iterator i=select_buf.begin(); i!=select_buf.end(); ++i)
  89                 if(i->min_depth<track_depth)
  90                 {
  91                         track = reinterpret_cast<Track3D *>(i->names.back());
  92                         track_depth = i->min_depth;
  93                 }
  94
  95         return track;
  96 }
  97
  98 void Layout3D::track_added(Track &t)
  99 {
 100         new Track3D(*this, t);
 101 }
 102
 103 void Layout3D::track_removed(Track &t)
 104 {
 105         for(list<Track3D *>::iterator i=tracks.begin(); i!=tracks.end(); ++i)
 106                 if(&(*i)->get_track()==&t)
 107                 {
 108                         delete *i;
 109                         return;
 110                 }
 111 }
 112
 113 } // namespace Marklin