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         quality(4)
  27 {
  28         layout.signal_track_added.connect(sigc::mem_fun(this, &Layout3D::track_added));
  29         layout.signal_track_removed.connect(sigc::mem_fun(this, &Layout3D::track_removed));
  30
  31         const set<Track *> &ltracks = layout.get_tracks();
  32         for(set<Track *>::iterator i=ltracks.begin(); i!=ltracks.end(); ++i)
  33                 track_added(**i);
  34 }
  35
  36 Layout3D::~Layout3D()
  37 {
  38         while(!tracks.empty())
  39                 delete tracks.front();
  40 }
  41
  42 void Layout3D::set_quality(unsigned q)
  43 {
  44         quality = q;
  45 }
  46
  47 void Layout3D::add_track(Track3D &t)
  48 {
  49         tracks.push_back(&t);
  50 }
  51
  52 void Layout3D::remove_track(Track3D &t)
  53 {
  54         list<Track3D *>::iterator i = find(tracks.begin(), tracks.end(), &t);
  55         if(i!=tracks.end())
  56                 tracks.erase(i);
  57 }
  58
  59 Track3D &Layout3D::get_track(const Track &t) const
  60 {
  61         for(list<Track3D *>::const_iterator i=tracks.begin(); i!=tracks.end(); ++i)
  62                 if(&(*i)->get_track()==&t)
  63                         return **i;
  64
  65         throw KeyError("Unknown track");
  66 }
  67
  68 Track3D *Layout3D::pick_track(float x, float y, float size) const
  69 {
  70         vector<GL::SelectRecord> select_buf;
  71         GL::select_buffer(select_buf);
  72         GL::render_mode(GL::SELECT);
  73
  74         {
  75                 GL::PushMatrix push_mat;
  76                 GL::load_identity();
  77
  78                 GL::ClipPlane(1, 0, x-size, 0).apply_to(0);
  79                 GL::ClipPlane(-1, 0, -x-size, 0).apply_to(1);
  80                 GL::ClipPlane(0, 1, y-size, 0).apply_to(2);
  81                 GL::ClipPlane(0, -1, -y-size, 0).apply_to(3);
  82         }
  83
  84         scene.render(0);
  85
  86         GL::ClipPlane::disable(0);
  87         GL::ClipPlane::disable(1);
  88         GL::ClipPlane::disable(2);
  89         GL::ClipPlane::disable(3);
  90
  91         GL::render_mode(GL::RENDER);
  92         Track3D *track = 0;
  93         unsigned track_depth = numeric_limits<unsigned>::max();
  94         for(vector<GL::SelectRecord>::iterator i=select_buf.begin(); i!=select_buf.end(); ++i)
  95                 if(i->min_depth<track_depth)
  96                 {
  97                         track = reinterpret_cast<Track3D *>(i->names.back());
  98                         track_depth = i->min_depth;
  99                 }
 100
 101         return track;
 102 }
 103
 104 void Layout3D::track_added(Track &t)
 105 {
 106         new Track3D(*this, t);
 107 }
 108
 109 void Layout3D::track_removed(Track &t)
 110 {
 111         for(list<Track3D *>::iterator i=tracks.begin(); i!=tracks.end(); ++i)
 112                 if(&(*i)->get_track()==&t)
 113                 {
 114                         delete *i;
 115                         return;
 116                 }
 117 }
 118
 119 } // namespace Marklin