source/3d/overlay.cpp

   1 /* $Id$
   2
   3 This file is part of R²C²
   4 Copyright © 2010-2011  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/immediate.h>
  12 #include <msp/gl/matrix.h>
  13 #include <msp/gl/texture.h>
  14 #include <msp/io/print.h>
  15 #include "overlay.h"
  16 #include "track.h"
  17 #include "tracktype.h"
  18
  19 using namespace std;
  20 using namespace Msp;
  21
  22 namespace R2C2 {
  23
  24 Overlay3D::Overlay3D(const Graphics::Window &w, const GL::Camera &c, const GL::Font &f):
  25         window(w),
  26         camera(c),
  27         font(f)
  28 { }
  29
  30 Overlay3D::~Overlay3D()
  31 {
  32         for(map<string, GL::Mesh *>::iterator i=graphics.begin(); i!=graphics.end(); ++i)
  33                 delete i->second;
  34         for(map<const Object3D *, Icon *>::iterator i=icons.begin(); i!=icons.end(); ++i)
  35                 delete i->second;
  36 }
  37
  38 void Overlay3D::set_label(const Object3D &track, const string &label)
  39 {
  40         get_icon(track).label = label;
  41         update_icon(get_icon(track));
  42 }
  43
  44 void Overlay3D::add_graphic(const Object3D &track, const string &grf_name)
  45 {
  46         const GL::Mesh *grf = get_graphic(grf_name);
  47         if(!grf)
  48                 return;
  49
  50         Icon &icon = get_icon(track);
  51         if(find(icon.graphics.begin(), icon.graphics.end(), grf)==icon.graphics.end())
  52                 icon.graphics.push_back(grf);
  53
  54         update_icon(icon);
  55 }
  56
  57 void Overlay3D::remove_graphic(const Object3D &track, const string &grf_name)
  58 {
  59         const GL::Mesh *grf = get_graphic(grf_name);
  60         Icon &icon = get_icon(track);
  61         icon.graphics.erase(remove(icon.graphics.begin(), icon.graphics.end(), grf), icon.graphics.end());
  62
  63         update_icon(icon);
  64 }
  65
  66 void Overlay3D::clear_graphics(const Object3D &track)
  67 {
  68         get_icon(track).graphics.clear();
  69         update_icon(get_icon(track));
  70 }
  71
  72 void Overlay3D::clear(const Object3D &track)
  73 {
  74         map<const Object3D *, Icon *>::iterator i = icons.find(&track);
  75         if(i!=icons.end())
  76         {
  77                 delete i->second;
  78                 icons.erase(i);
  79         }
  80 }
  81
  82 void Overlay3D::render(const GL::Tag &tag) const
  83 {
  84         if(tag==0)
  85         {
  86                 GL::matrix_mode(GL::PROJECTION);
  87                 GL::push_matrix();
  88                 GL::load_identity();
  89                 GL::scale(2.0/window.get_width(), 2.0/window.get_height(), 1.0);
  90                 GL::matrix_mode(GL::MODELVIEW);
  91                 GL::push_matrix();
  92                 GL::load_identity();
  93
  94                 glLineWidth(1);
  95
  96                 int size = int(font.get_default_size()+0.5);
  97                 float spacing = round(size*1.1)/size;
  98                 float baseline = round((0.5-font.get_ascent()*0.5-font.get_descent()*0.5)*size)/size;
  99
 100                 for(map<const Object3D *, Icon *>::const_iterator i=icons.begin(); i!=icons.end(); ++i)
 101                 {
 102                         if(!i->first->is_visible())
 103                                 continue;
 104
 105                         const Icon &icon = *i->second;
 106
 107                         Point node = i->first->get_node();
 108                         GL::Vector3 p = camera.project(GL::Vector3(node.x, node.y, node.z));
 109
 110                         GL::PushMatrix push_mat;
 111                         p.x = int(p.x*0.5*window.get_width()-icon.width*size/2);
 112                         p.y = int(p.y*0.5*window.get_height());
 113                         GL::translate(p.x, p.y, p.z);
 114                         GL::scale_uniform(size);
 115
 116                         icon.background.draw();
 117
 118                         glColor3f(0.0, 1.0, 0.0);
 119                         for(vector<const GL::Mesh *>::const_iterator j=icon.graphics.begin(); j!=icon.graphics.end(); ++j)
 120                         {
 121                                 (*j)->draw();
 122                                 GL::translate(spacing, 0, 0);
 123                         }
 124
 125                         GL::translate(0, baseline, 0);
 126                         GL::Immediate imm((GL::TEXCOORD2, GL::COLOR4_UBYTE, GL::VERTEX2));
 127                         imm.color(0.0f, 1.0f, 0.0f);
 128                         font.draw_string(icon.label, imm);
 129                         GL::Texture::unbind();
 130                 }
 131
 132                 GL::matrix_mode(GL::PROJECTION);
 133                 GL::pop_matrix();
 134                 GL::matrix_mode(GL::MODELVIEW);
 135                 GL::pop_matrix();
 136
 137                 glColor3f(1.0, 1.0, 1.0);
 138         }
 139 }
 140
 141 Overlay3D::Icon &Overlay3D::get_icon(const Object3D &track)
 142 {
 143         Icon *&icon = icons[&track];
 144         if(!icon)
 145                 icon = new Icon;
 146
 147         return *icon;
 148 }
 149
 150 const GL::Mesh *Overlay3D::get_graphic(const string &name)
 151 {
 152         GL::Mesh *&grf = graphics[name];
 153         if(!grf)
 154         {
 155                 grf = new GL::Mesh;
 156                 try
 157                 {
 158                         DataFile::load(*grf, (FS::Path("icons")/(name+".mesh")).str());
 159                 }
 160                 catch(const Exception &e)
 161                 {
 162                         IO::print("Error loading overlay graphic '%s': %s\n", name, e.what());
 163                         delete grf;
 164                         grf = 0;
 165                 }
 166         }
 167
 168         return grf;
 169 }
 170
 171 void Overlay3D::update_icon(Icon &icon)
 172 {
 173         icon.background.clear();
 174
 175         icon.width = max(icon.graphics.size()*1.1+font.get_string_width(icon.label), 1.0);
 176
 177         GL::MeshBuilder bld(icon.background);
 178         bld.color(0.2f, 0.2f, 0.2f, 0.7f);
 179
 180         bld.begin(GL::TRIANGLE_FAN);
 181         bld.vertex(0.4, 0.5);
 182         bld.vertex(icon.width-0.4, 0.5);
 183         bld.vertex(icon.width-0.4, 1.2);
 184         for(int i=4; i<=12; ++i)
 185                 bld.vertex(0.4+cos(i*M_PI/8)*0.7, 0.5+sin(i*M_PI/8)*0.7);
 186         bld.end();
 187
 188         bld.begin(GL::TRIANGLE_FAN);
 189         bld.vertex(icon.width-0.4, 0.5);
 190         bld.vertex(0.4, 0.5);
 191         bld.vertex(0.4, -0.2);
 192         for(int i=-4; i<=4; ++i)
 193                 bld.vertex(icon.width-0.4+cos(i*M_PI/8)*0.7, 0.5+sin(i*M_PI/8)*0.7);
 194         bld.end();
 195 }
 196
 197
 198 Overlay3D::Icon::Icon():
 199         width(1.0),
 200         background((GL::COLOR4_UBYTE, GL::VERTEX2))
 201 { }
 202
 203 } // namespace R2C2