source/3d/overlay.cpp

   1 #include <algorithm>
   2 #include <cmath>
   3 #include <msp/fs/path.h>
   4 #include <msp/gl/framebuffer.h>
   5 #include <msp/gl/immediate.h>
   6 #include <msp/gl/matrix.h>
   7 #include <msp/gl/renderer.h>
   8 #include <msp/gl/texture2d.h>
   9 #include <msp/io/print.h>
  10 #include "overlay.h"
  11 #include "track.h"
  12 #include "tracktype.h"
  13
  14 using namespace std;
  15 using namespace Msp;
  16
  17 namespace R2C2 {
  18
  19 Overlay3D::Overlay3D(const GL::Font &f):
  20         font(f)
  21 { }
  22
  23 Overlay3D::~Overlay3D()
  24 {
  25         for(map<string, GL::Mesh *>::iterator i=graphics.begin(); i!=graphics.end(); ++i)
  26                 delete i->second;
  27         for(map<const Object3D *, Icon *>::iterator i=icons.begin(); i!=icons.end(); ++i)
  28                 delete i->second;
  29 }
  30
  31 void Overlay3D::set_label(const Object3D &track, const string &label)
  32 {
  33         get_icon(track).label = label;
  34         update_icon(get_icon(track));
  35 }
  36
  37 void Overlay3D::add_graphic(const Object3D &track, const string &grf_name)
  38 {
  39         const GL::Mesh *grf = get_graphic(grf_name);
  40         if(!grf)
  41                 return;
  42
  43         Icon &icon = get_icon(track);
  44         if(find(icon.graphics.begin(), icon.graphics.end(), grf)==icon.graphics.end())
  45                 icon.graphics.push_back(grf);
  46
  47         update_icon(icon);
  48 }
  49
  50 void Overlay3D::remove_graphic(const Object3D &track, const string &grf_name)
  51 {
  52         const GL::Mesh *grf = get_graphic(grf_name);
  53         Icon &icon = get_icon(track);
  54         icon.graphics.erase(remove(icon.graphics.begin(), icon.graphics.end(), grf), icon.graphics.end());
  55
  56         update_icon(icon);
  57 }
  58
  59 void Overlay3D::clear_graphics(const Object3D &track)
  60 {
  61         get_icon(track).graphics.clear();
  62         update_icon(get_icon(track));
  63 }
  64
  65 void Overlay3D::clear(const Object3D &track)
  66 {
  67         map<const Object3D *, Icon *>::iterator i = icons.find(&track);
  68         if(i!=icons.end())
  69         {
  70                 delete i->second;
  71                 icons.erase(i);
  72         }
  73 }
  74
  75 void Overlay3D::render(GL::Renderer &renderer, const GL::Tag &) const
  76 {
  77         unsigned fb_width = GL::Framebuffer::current()->get_width();
  78         unsigned fb_height = GL::Framebuffer::current()->get_height();
  79
  80         GL::Renderer::Push push(renderer);
  81         GL::MatrixStack::Push push_proj(GL::MatrixStack::projection());
  82
  83         GL::MatrixStack::projection() = GL::Matrix::scaling(2.0/fb_width, 2.0/fb_height, 1.0);
  84
  85         glLineWidth(1);
  86
  87         int size = int(font.get_native_size()+0.5);
  88         float spacing = round(size*1.1)/size;
  89         float baseline = round((0.5-font.get_ascent()*0.5-font.get_descent()*0.5)*size)/size;
  90
  91         for(map<const Object3D *, Icon *>::const_iterator i=icons.begin(); i!=icons.end(); ++i)
  92         {
  93                 if(!i->first->is_visible())
  94                         continue;
  95
  96                 const Icon &icon = *i->second;
  97
  98                 GL::Vector3 p = renderer.get_camera()->project(i->first->get_node());
  99                 p.x = int(p.x*0.5*fb_width-icon.width*size/2);
 100                 p.y = int(p.y*0.5*fb_height);
 101
 102                 GL::Renderer::Push push2(renderer);
 103                 renderer.matrix_stack() = GL::Matrix::translation(p);
 104                 renderer.matrix_stack() *= GL::Matrix::scaling(size);
 105
 106                 icon.background.draw(renderer);
 107
 108                 glColor3f(0.0, 1.0, 0.0);
 109                 for(vector<const GL::Mesh *>::const_iterator j=icon.graphics.begin(); j!=icon.graphics.end(); ++j)
 110                 {
 111                         (*j)->draw(renderer);
 112                         renderer.matrix_stack() *= GL::Matrix::translation(spacing, 0, 0);
 113                 }
 114
 115                 renderer.matrix_stack() *= GL::Matrix::translation(0, baseline, 0);
 116                 renderer.set_texture(&font.get_texture());
 117                 icon.text.draw(renderer);
 118         }
 119
 120         glColor3f(1.0, 1.0, 1.0);
 121 }
 122
 123 Overlay3D::Icon &Overlay3D::get_icon(const Object3D &track)
 124 {
 125         Icon *&icon = icons[&track];
 126         if(!icon)
 127                 icon = new Icon;
 128
 129         return *icon;
 130 }
 131
 132 const GL::Mesh *Overlay3D::get_graphic(const string &name)
 133 {
 134         GL::Mesh *&grf = graphics[name];
 135         if(!grf)
 136         {
 137                 grf = new GL::Mesh;
 138                 try
 139                 {
 140                         DataFile::load(*grf, (FS::Path("icons")/(name+".mesh")).str());
 141                 }
 142                 catch(const exception &e)
 143                 {
 144                         IO::print("Error loading overlay graphic '%s': %s\n", name, e.what());
 145                         delete grf;
 146                         grf = 0;
 147                 }
 148         }
 149
 150         return grf;
 151 }
 152
 153 void Overlay3D::update_icon(Icon &icon)
 154 {
 155         icon.background.clear();
 156
 157         icon.width = max(icon.graphics.size()*1.1+font.get_string_width(icon.label), 1.0);
 158
 159         {
 160                 GL::MeshBuilder bld(icon.background);
 161                 bld.color(0.05f, 0.05f, 0.05f, 0.7f);
 162
 163                 bld.begin(GL::TRIANGLE_FAN);
 164                 bld.vertex(0.4, 0.5);
 165                 bld.vertex(icon.width-0.4, 0.5);
 166                 bld.vertex(icon.width-0.4, 1.2);
 167                 for(int i=4; i<=12; ++i)
 168                         bld.vertex(0.4+cos(i*M_PI/8)*0.7, 0.5+sin(i*M_PI/8)*0.7);
 169                 bld.end();
 170
 171                 bld.begin(GL::TRIANGLE_FAN);
 172                 bld.vertex(icon.width-0.4, 0.5);
 173                 bld.vertex(0.4, 0.5);
 174                 bld.vertex(0.4, -0.2);
 175                 for(int i=-4; i<=4; ++i)
 176                         bld.vertex(icon.width-0.4+cos(i*M_PI/8)*0.7, 0.5+sin(i*M_PI/8)*0.7);
 177                 bld.end();
 178         }
 179
 180         icon.text.clear();
 181
 182         {
 183                 GL::MeshBuilder bld(icon.text);
 184                 bld.color(0.0f, 1.0f, 0.0f);
 185                 font.build_string(icon.label, bld);
 186         }
 187 }
 188
 189
 190 Overlay3D::Icon::Icon():
 191         width(1.0),
 192         background((GL::COLOR4_UBYTE, GL::VERTEX2)),
 193         text((GL::COLOR4_UBYTE, GL::TEXCOORD2, GL::VERTEX2))
 194 { }
 195
 196 } // namespace R2C2