source/3d/overlay.cpp

   1 /* $Id$
   2
   3 This file is part of the MSP Märklin suite
   4 Copyright © 2010 Mikkosoft Productions, Mikko Rasa
   5 Distributed under the GPL
   6 */
   7
   8 #include <algorithm>
   9 #include <cmath>
  10 #include <msp/fs/path.h>
  11 #include <msp/gl/matrix.h>
  12 #include <msp/gl/texture.h>
  13 #include <msp/io/print.h>
  14 #include "overlay.h"
  15 #include "track.h"
  16 #include "tracktype.h"
  17
  18 using namespace std;
  19 using namespace Msp;
  20
  21 namespace Marklin {
  22
  23 Overlay3D::Overlay3D(const Graphics::Window &w, const GL::Camera &c, const GL::Font &f):
  24         window(w),
  25         camera(c),
  26         font(f)
  27 { }
  28
  29 Overlay3D::~Overlay3D()
  30 {
  31         for(map<string, GL::Mesh *>::iterator i=graphics.begin(); i!=graphics.end(); ++i)
  32                 delete i->second;
  33         for(map<const Object3D *, Icon *>::iterator i=icons.begin(); i!=icons.end(); ++i)
  34                 delete i->second;
  35 }
  36
  37 void Overlay3D::set_label(const Object3D &track, const string &label)
  38 {
  39         get_icon(track).label = label;
  40         update_icon(get_icon(track));
  41 }
  42
  43 void Overlay3D::add_graphic(const Object3D &track, const string &grf_name)
  44 {
  45         const GL::Mesh *grf = get_graphic(grf_name);
  46         if(!grf)
  47                 return;
  48
  49         Icon &icon = get_icon(track);
  50         if(find(icon.graphics.begin(), icon.graphics.end(), grf)==icon.graphics.end())
  51                 icon.graphics.push_back(grf);
  52
  53         update_icon(icon);
  54 }
  55
  56 void Overlay3D::remove_graphic(const Object3D &track, const string &grf_name)
  57 {
  58         const GL::Mesh *grf = get_graphic(grf_name);
  59         Icon &icon = get_icon(track);
  60         icon.graphics.erase(remove(icon.graphics.begin(), icon.graphics.end(), grf), icon.graphics.end());
  61
  62         update_icon(icon);
  63 }
  64
  65 void Overlay3D::clear_graphics(const Object3D &track)
  66 {
  67         get_icon(track).graphics.clear();
  68         update_icon(get_icon(track));
  69 }
  70
  71 void Overlay3D::clear(const Object3D &track)
  72 {
  73         map<const Object3D *, Icon *>::iterator i = icons.find(&track);
  74         if(i!=icons.end())
  75         {
  76                 delete i->second;
  77                 icons.erase(i);
  78         }
  79 }
  80
  81 void Overlay3D::render(const GL::Tag &tag) const
  82 {
  83         if(tag==0)
  84         {
  85                 GL::matrix_mode(GL::PROJECTION);
  86                 GL::push_matrix();
  87                 GL::load_identity();
  88                 GL::scale(2.0/window.get_width(), 2.0/window.get_height(), 1.0);
  89                 GL::matrix_mode(GL::MODELVIEW);
  90                 GL::push_matrix();
  91                 GL::load_identity();
  92
  93                 glLineWidth(1);
  94
  95                 int size = int(font.get_default_size()+0.5);
  96                 float spacing = round(size*1.1)/size;
  97                 float baseline = round((0.5-font.get_ascent()*0.5-font.get_descent()*0.5)*size)/size;
  98
  99                 for(map<const Object3D *, Icon *>::const_iterator i=icons.begin(); i!=icons.end(); ++i)
 100                 {
 101                         const Icon &icon = *i->second;
 102
 103                         Point node = i->first->get_node();
 104                         GL::Vector3 p = camera.project(GL::Vector3(node.x, node.y, node.z));
 105
 106                         GL::PushMatrix push_mat;
 107                         p.x = int(p.x*0.5*window.get_width()-icon.width*size/2);
 108                         p.y = int(p.y*0.5*window.get_height());
 109                         GL::translate(p.x, p.y, p.z);
 110                         GL::scale_uniform(size);
 111
 112                         icon.background.draw();
 113
 114                         glColor3f(0.0, 1.0, 0.0);
 115                         for(vector<const GL::Mesh *>::const_iterator j=icon.graphics.begin(); j!=icon.graphics.end(); ++j)
 116                         {
 117                                 (*j)->draw();
 118                                 GL::translate(spacing, 0, 0);
 119                         }
 120
 121                         GL::translate(0, baseline, 0);
 122                         font.draw_string(icon.label);
 123                         GL::Texture::unbind();
 124                 }
 125
 126                 GL::matrix_mode(GL::PROJECTION);
 127                 GL::pop_matrix();
 128                 GL::matrix_mode(GL::MODELVIEW);
 129                 GL::pop_matrix();
 130         }
 131 }
 132
 133 Overlay3D::Icon &Overlay3D::get_icon(const Object3D &track)
 134 {
 135         Icon *&icon = icons[&track];
 136         if(!icon)
 137                 icon = new Icon;
 138
 139         return *icon;
 140 }
 141
 142 const GL::Mesh *Overlay3D::get_graphic(const string &name)
 143 {
 144         GL::Mesh *&grf = graphics[name];
 145         if(!grf)
 146         {
 147                 grf = new GL::Mesh;
 148                 try
 149                 {
 150                         DataFile::load(*grf, (FS::Path("icons")/(name+".mesh")).str());
 151                 }
 152                 catch(const Exception &e)
 153                 {
 154                         IO::print("Error loading overlay graphic '%s': %s\n", name, e.what());
 155                         delete grf;
 156                         grf = 0;
 157                 }
 158         }
 159
 160         return grf;
 161 }
 162
 163 void Overlay3D::update_icon(Icon &icon)
 164 {
 165         icon.background.clear();
 166
 167         icon.width = max(icon.graphics.size()*1.1+font.get_string_width(icon.label), 1.0);
 168
 169         GL::MeshBuilder bld(icon.background);
 170         bld.color(0.2f, 0.2f, 0.2f, 0.7f);
 171
 172         bld.begin(GL::TRIANGLE_FAN);
 173         bld.vertex(0.4, 0.5);
 174         bld.vertex(icon.width-0.4, 0.5);
 175         bld.vertex(icon.width-0.4, 1.2);
 176         for(int i=4; i<=12; ++i)
 177                 bld.vertex(0.4+cos(i*M_PI/8)*0.7, 0.5+sin(i*M_PI/8)*0.7);
 178         bld.end();
 179
 180         bld.begin(GL::TRIANGLE_FAN);
 181         bld.vertex(icon.width-0.4, 0.5);
 182         bld.vertex(0.4, 0.5);
 183         bld.vertex(0.4, -0.2);
 184         for(int i=-4; i<=4; ++i)
 185                 bld.vertex(icon.width-0.4+cos(i*M_PI/8)*0.7, 0.5+sin(i*M_PI/8)*0.7);
 186         bld.end();
 187 }
 188
 189
 190 Overlay3D::Icon::Icon():
 191         width(1.0),
 192         background((GL::COLOR4_UBYTE, GL::VERTEX2))
 193 { }
 194
 195 } // namespace Marklin