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         for(list<Track3D *>::iterator i=tracks.begin(); i!=tracks.end(); ++i)
  33                 delete *i;
  34 }
  35
  36 void Layout3D::set_quality(unsigned q)
  37 {
  38         quality = q;
  39 }
  40
  41 void Layout3D::render(bool endpoints) const
  42 {
  43         GL::Texture::unbind();
  44         glEnable(GL_DEPTH_TEST);
  45
  46         for(list<Track3D *>::const_iterator i=tracks.begin(); i!=tracks.end(); ++i)
  47                 (*i)->render();
  48
  49         if(endpoints)
  50         {
  51                 glDepthMask(false);
  52                 for(list<Track3D *>::const_iterator i=tracks.begin(); i!=tracks.end(); ++i)
  53                         (*i)->render_endpoints();
  54                 glDepthMask(true);
  55         }
  56 }
  57
  58 Track3D &Layout3D::get_track(const Track &t) const
  59 {
  60         for(list<Track3D *>::const_iterator i=tracks.begin(); i!=tracks.end(); ++i)
  61                 if(&(*i)->get_track()==&t)
  62                         return **i;
  63
  64         throw KeyError("Unknown track");
  65 }
  66
  67 Track3D *Layout3D::pick_track(float x, float y, float size) const
  68 {
  69         vector<GL::SelectRecord> select_buf;
  70         GL::select_buffer(select_buf);
  71         GL::render_mode(GL::SELECT);
  72
  73         glPushMatrix();
  74         glLoadIdentity();
  75
  76         double clip[4];
  77         clip[0] = 1;
  78         clip[1] = 0;
  79         clip[2] = x-size;
  80         clip[3] = 0;
  81         glClipPlane(GL_CLIP_PLANE0, clip);
  82         glEnable(GL_CLIP_PLANE0);
  83
  84         clip[0] = -1;
  85         clip[2] = -(x+size);
  86         glClipPlane(GL_CLIP_PLANE1, clip);
  87         glEnable(GL_CLIP_PLANE1);
  88
  89         clip[0] = 0;
  90         clip[1] = 1;
  91         clip[2] = y-size;
  92         glClipPlane(GL_CLIP_PLANE2, clip);
  93         glEnable(GL_CLIP_PLANE2);
  94
  95         clip[1] = -1;
  96         clip[2] = -(y+size);
  97         glClipPlane(GL_CLIP_PLANE3, clip);
  98         glEnable(GL_CLIP_PLANE3);
  99
 100         glPopMatrix();
 101
 102         render();
 103
 104         glDisable(GL_CLIP_PLANE0);
 105         glDisable(GL_CLIP_PLANE1);
 106         glDisable(GL_CLIP_PLANE2);
 107         glDisable(GL_CLIP_PLANE3);
 108
 109         GL::render_mode(GL::RENDER);
 110         Track3D *track = 0;
 111         unsigned track_depth = numeric_limits<unsigned>::max();
 112         for(vector<GL::SelectRecord>::iterator i=select_buf.begin(); i!=select_buf.end(); ++i)
 113                 if(i->min_depth<track_depth)
 114                 {
 115                         track = reinterpret_cast<Track3D *>(i->names.back());
 116                         track_depth = i->min_depth;
 117                 }
 118
 119         return track;
 120 }
 121
 122 void Layout3D::track_added(Track &t)
 123 {
 124         tracks.push_back(new Track3D(*this, t));
 125 }
 126
 127 void Layout3D::track_removed(Track &t)
 128 {
 129         for(list<Track3D *>::iterator i=tracks.begin(); i!=tracks.end(); ++i)
 130                 if(&(*i)->get_track()==&t)
 131                 {
 132                         delete *i;
 133                         tracks.erase(i);
 134                         return;
 135                 }
 136 }
 137
 138 } // namespace Marklin