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/rendermode.h>
  11 #include <msp/gl/select.h>
  12 #include <msp/gl/texture.h>
  13 #include <msp/datafile/parser.h>
  14 #include "layout.h"
  15
  16 using namespace std;
  17 using namespace Msp;
  18
  19 namespace Marklin {
  20
  21 Layout3D::Layout3D(Layout &l):
  22         layout(l),
  23         catalogue(layout.get_catalogue()),
  24         quality(4)
  25 {
  26         layout.signal_track_added.connect(sigc::mem_fun(this, &Layout3D::track_added));
  27         layout.signal_track_removed.connect(sigc::mem_fun(this, &Layout3D::track_removed));
  28 }
  29
  30 Layout3D::~Layout3D()
  31 {
  32         while(!tracks.empty())
  33                 delete tracks.front();
  34 }
  35
  36 void Layout3D::set_quality(unsigned q)
  37 {
  38         quality = q;
  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         glPushMatrix();
  69         glLoadIdentity();
  70
  71         double clip[4];
  72         clip[0] = 1;
  73         clip[1] = 0;
  74         clip[2] = x-size;
  75         clip[3] = 0;
  76         glClipPlane(GL_CLIP_PLANE0, clip);
  77         glEnable(GL_CLIP_PLANE0);
  78
  79         clip[0] = -1;
  80         clip[2] = -(x+size);
  81         glClipPlane(GL_CLIP_PLANE1, clip);
  82         glEnable(GL_CLIP_PLANE1);
  83
  84         clip[0] = 0;
  85         clip[1] = 1;
  86         clip[2] = y-size;
  87         glClipPlane(GL_CLIP_PLANE2, clip);
  88         glEnable(GL_CLIP_PLANE2);
  89
  90         clip[1] = -1;
  91         clip[2] = -(y+size);
  92         glClipPlane(GL_CLIP_PLANE3, clip);
  93         glEnable(GL_CLIP_PLANE3);
  94
  95         glPopMatrix();
  96
  97         scene.render(0);
  98
  99         glDisable(GL_CLIP_PLANE0);
 100         glDisable(GL_CLIP_PLANE1);
 101         glDisable(GL_CLIP_PLANE2);
 102         glDisable(GL_CLIP_PLANE3);
 103
 104         GL::render_mode(GL::RENDER);
 105         Track3D *track = 0;
 106         unsigned track_depth = numeric_limits<unsigned>::max();
 107         for(vector<GL::SelectRecord>::iterator i=select_buf.begin(); i!=select_buf.end(); ++i)
 108                 if(i->min_depth<track_depth)
 109                 {
 110                         track = reinterpret_cast<Track3D *>(i->names.back());
 111                         track_depth = i->min_depth;
 112                 }
 113
 114         return track;
 115 }
 116
 117 void Layout3D::track_added(Track &t)
 118 {
 119         new Track3D(*this, t);
 120 }
 121
 122 void Layout3D::track_removed(Track &t)
 123 {
 124         for(list<Track3D *>::iterator i=tracks.begin(); i!=tracks.end(); ++i)
 125                 if(&(*i)->get_track()==&t)
 126                 {
 127                         delete *i;
 128                         return;
 129                 }
 130 }
 131
 132 } // namespace Marklin