tools/viewer.cpp

   1 #include <cmath>
   2 #include <msp/core/application.h>
   3 #include <msp/core/getopt.h>
   4 #include <msp/datafile/directorysource.h>
   5 #include <msp/datafile/packsource.h>
   6 #include <msp/fs/stat.h>
   7 #include <msp/fs/utils.h>
   8 #include <msp/graphics/simplewindow.h>
   9 #include <msp/gl/animatedobject.h>
  10 #include <msp/gl/animation.h>
  11 #include <msp/gl/animationplayer.h>
  12 #include <msp/gl/blend.h>
  13 #include <msp/gl/camera.h>
  14 #include <msp/gl/framebuffer.h>
  15 #include <msp/gl/light.h>
  16 #include <msp/gl/lighting.h>
  17 #include <msp/gl/mesh.h>
  18 #include <msp/gl/object.h>
  19 #include <msp/gl/sequence.h>
  20 #include <msp/gl/sequencebuilder.h>
  21 #include <msp/gl/sequencetemplate.h>
  22 #include <msp/gl/renderer.h>
  23 #include <msp/gl/resources.h>
  24 #include <msp/gl/simplescene.h>
  25 #include <msp/gl/technique.h>
  26 #include <msp/gl/windowview.h>
  27 #include <msp/input/mouse.h>
  28 #include <msp/io/print.h>
  29 #include <msp/strings/regex.h>
  30 #include <msp/time/timestamp.h>
  31 #include <msp/time/utils.h>
  32
  33 using namespace std;
  34 using namespace Msp;
  35
  36 class Viewer: public RegisteredApplication<Viewer>
  37 {
  38 private:
  39         struct Options
  40         {
  41                 list<string> resource_locations;
  42                 string animation_name;
  43                 string renderable_name;
  44                 Graphics::WindowOptions wnd_opts;
  45                 Graphics::GLOptions gl_opts;
  46
  47                 Options(int, char **);
  48         };
  49
  50         class Resources: public GL::Resources
  51         {
  52         private:
  53                 DataFile::DirectorySource dir_source;
  54                 DataFile::PackSource pack_source;
  55
  56         public:
  57                 Resources();
  58
  59                 void add_directory(const string &);
  60                 void add_pack(const string &);
  61         };
  62
  63         Options opts;
  64         Graphics::Display display;
  65         Graphics::Window window;
  66         Graphics::GLContext gl_ctx;
  67         Input::Mouse mouse;
  68         Resources resources;
  69         GL::WindowView view;
  70         GL::Sequence *sequence;
  71         GL::Renderable *renderable;
  72         GL::AnimatedObject *anim_object;
  73         GL::AnimationPlayer *anim_player;
  74         GL::Light light;
  75         GL::Lighting lighting;
  76         GL::Camera camera;
  77         float yaw;
  78         float pitch;
  79         float distance;
  80         float light_yaw;
  81         float light_pitch;
  82         unsigned dragging;
  83         Time::TimeStamp last_tick;
  84
  85 public:
  86         Viewer(int, char **);
  87 private:
  88         template<typename T>
  89         T *load(const string &);
  90 public:
  91         ~Viewer();
  92
  93         virtual int main();
  94 private:
  95         virtual void tick();
  96
  97         void button_press(unsigned);
  98         void button_release(unsigned);
  99         void axis_motion(unsigned, float, float);
 100
 101         void update_camera();
 102         void update_light();
 103 };
 104
 105
 106 Viewer::Options::Options(int argc, char **argv)
 107 {
 108         string window_size;
 109
 110         GetOpt getopt;
 111         getopt.add_option('r', "resources", resource_locations, GetOpt::REQUIRED_ARG);
 112         getopt.add_option('a', "animation", animation_name, GetOpt::REQUIRED_ARG);
 113         getopt.add_option('w', "window-size", window_size, GetOpt::REQUIRED_ARG);
 114         getopt.add_argument("renderable", renderable_name);
 115         getopt(argc, argv);
 116
 117         wnd_opts.width = 1024;
 118         wnd_opts.height = 768;
 119         if (!window_size.empty())
 120         {
 121                 RegMatch m = Regex("^([1-9][0-9]*)x([1-9][0-9]*)$").match(window_size);
 122                 if(!m)
 123                         throw usage_error("Invalid window size");
 124
 125                 wnd_opts.width = lexical_cast<unsigned>(m[1].str);
 126                 wnd_opts.height = lexical_cast<unsigned>(m[2].str);
 127         }
 128         gl_opts.gl_version_major = Graphics::GLOptions::LATEST_VERSION;
 129         gl_opts.core_profile = true;
 130 }
 131
 132 Viewer::Viewer(int argc, char **argv):
 133         opts(argc, argv),
 134         window(display, opts.wnd_opts),
 135         gl_ctx(window, opts.gl_opts),
 136         mouse(window),
 137         view(window, gl_ctx),
 138         sequence(0),
 139         renderable(0),
 140         anim_object(0),
 141         anim_player(0),
 142         yaw(0),
 143         pitch(0),
 144         distance(10),
 145         light_yaw(0),
 146         light_pitch(0),
 147         dragging(0)
 148 {
 149         for(list<string>::const_iterator i=opts.resource_locations.begin(); i!=opts.resource_locations.end(); ++i)
 150         {
 151                 if(FS::is_dir(*i))
 152                         resources.add_directory(*i);
 153                 else
 154                 {
 155                         string ext = FS::extpart(*i);
 156                         if(ext==".mdp")
 157                                 resources.add_pack(*i);
 158                         else
 159                                 DataFile::load(resources, *i);
 160                 }
 161         }
 162
 163         GL::Object *object = 0;
 164
 165         string ext = FS::extpart(opts.renderable_name);
 166         if(ext==".mesh")
 167         {
 168                 GL::Mesh *mesh = 0;
 169                 if(FS::exists(opts.renderable_name))
 170                 {
 171                         mesh = new GL::Mesh;
 172                         DataFile::load(*mesh, opts.renderable_name);
 173                         resources.add("__"+opts.renderable_name, mesh);
 174                 }
 175                 else
 176                         mesh = &resources.get<GL::Mesh>(opts.renderable_name);
 177
 178                 object = new GL::Object;
 179                 GL::Technique *tech = new GL::Technique;
 180                 tech->add_pass(0);
 181                 object->set_mesh(mesh);
 182                 object->set_technique(tech);
 183                 renderable = object;
 184
 185                 resources.add("__.tech", tech);
 186                 resources.add("__.object", object);
 187         }
 188         else if(ext==".object")
 189                 renderable = load<GL::Object>(opts.renderable_name);
 190         else if(ext==".scene")
 191         {
 192                 if(FS::exists(opts.renderable_name))
 193                 {
 194                         GL::Scene::GenericLoader ldr(resources);
 195                         IO::BufferedFile in(opts.renderable_name);
 196                         DataFile::Parser parser(in, opts.renderable_name);
 197                         ldr.load(parser);
 198                         renderable = ldr.get_scene();
 199                 }
 200                 else
 201                         renderable = &resources.get<GL::Scene>(opts.renderable_name);
 202         }
 203         else if(ext==".seq")
 204         {
 205                 GL::SequenceTemplate *tmpl = load<GL::SequenceTemplate>(opts.renderable_name);
 206                 GL::SequenceBuilder bld(*tmpl);
 207                 sequence = bld.build(view);
 208         }
 209         else
 210                 throw usage_error("Unknown renderable type");
 211
 212         if(!opts.animation_name.empty())
 213         {
 214                 if(!object)
 215                         throw usage_error("Must have an object to animate");
 216
 217                 GL::Animation *anim = load<GL::Animation>(opts.animation_name);
 218                 anim_player = new GL::AnimationPlayer;
 219                 anim_object = new GL::AnimatedObject(*object);
 220                 anim_player->play(*anim_object, *anim);
 221                 renderable = anim_object;
 222         }
 223
 224         window.signal_close.connect(sigc::bind(sigc::mem_fun(this, &Viewer::exit), 0));
 225         mouse.signal_button_press.connect(sigc::bind_return(sigc::mem_fun(this, &Viewer::button_press), false));
 226         mouse.signal_button_release.connect(sigc::bind_return(sigc::mem_fun(this, &Viewer::button_release), false));
 227         mouse.signal_axis_motion.connect(sigc::bind_return(sigc::mem_fun(this, &Viewer::axis_motion), false));
 228
 229         light.set_position(GL::Vector4(0, 0, 1, 0));
 230         lighting.attach(light);
 231
 232         camera.set_up_direction(GL::Vector3(0, 0, 1));
 233         update_camera();
 234
 235         if(!sequence)
 236         {
 237                 sequence = new GL::Sequence(view.get_width(), view.get_height());
 238                 GL::Sequence::Step &step = sequence->add_step(0, *renderable);
 239                 step.set_lighting(&lighting);
 240                 step.set_depth_test(GL::LEQUAL);
 241                 step.set_blend(GL::Blend(GL::SRC_ALPHA, GL::ONE_MINUS_SRC_ALPHA));
 242         }
 243
 244         view.set_content(sequence);
 245         view.set_camera(&camera);
 246 }
 247
 248 template<typename T>
 249 T *Viewer::load(const string &name)
 250 {
 251         if(FS::exists(name))
 252         {
 253                 T *thing = new T;
 254                 DataFile::load(*thing, name, resources);
 255                 resources.add("__"+name, thing);
 256                 return thing;
 257         }
 258         else
 259                 return &resources.get<T>(name);
 260 }
 261
 262 Viewer::~Viewer()
 263 {
 264         delete anim_player;
 265         delete anim_object;
 266         delete sequence;
 267 }
 268
 269 int Viewer::main()
 270 {
 271         window.show();
 272         return Application::main();
 273 }
 274
 275 void Viewer::tick()
 276 {
 277         if(anim_player)
 278         {
 279                 Time::TimeStamp t = Time::now();
 280                 Time::TimeDelta dt;
 281                 if(last_tick)
 282                         dt = t-last_tick;
 283                 last_tick = t;
 284
 285                 anim_player->tick(dt);
 286         }
 287
 288         display.tick();
 289         view.render();
 290 }
 291
 292 void Viewer::button_press(unsigned btn)
 293 {
 294         if(btn==1)
 295         {
 296                 dragging = 1;
 297         }
 298         else if(btn==3)
 299         {
 300                 dragging = 3;
 301                 axis_motion(0, 0, 0);
 302         }
 303         else if(btn==4)
 304         {
 305                 distance *= 0.9;
 306                 update_camera();
 307         }
 308         else if(btn==5)
 309         {
 310                 distance *= 1.1;
 311                 update_camera();
 312         }
 313 }
 314
 315 void Viewer::button_release(unsigned btn)
 316 {
 317         if(btn==dragging)
 318                 dragging = 0;
 319 }
 320
 321 void Viewer::axis_motion(unsigned axis, float, float delta)
 322 {
 323         if(dragging==1)
 324         {
 325                 float dx = (axis==0 ? delta : 0);
 326                 float dy = (axis==1 ? delta : 0);
 327
 328                 yaw -= dx*M_PI*2;
 329                 while(yaw>M_PI)
 330                         yaw -= M_PI*2;
 331                 while(yaw<-M_PI)
 332                         yaw += M_PI*2;
 333
 334                 pitch += dy*M_PI;
 335                 if(pitch>M_PI*0.49)
 336                         pitch = M_PI*0.49;
 337                 if(pitch<-M_PI*0.49)
 338                         pitch = -M_PI*0.49;
 339
 340                 update_camera();
 341         }
 342         else if(dragging==3)
 343         {
 344                 float x = mouse.get_axis_value(0);
 345                 float y = mouse.get_axis_value(1);
 346
 347                 light_yaw = yaw+x*M_PI;
 348                 light_pitch = pitch-y*M_PI;
 349
 350                 update_light();
 351         }
 352 }
 353
 354 void Viewer::update_camera()
 355 {
 356         float cy = cos(yaw);
 357         float sy = sin(yaw);
 358         float cp = cos(pitch);
 359         float sp = sin(pitch);
 360         camera.set_position(GL::Vector3(-cy*cp*distance, -sy*cp*distance, -sp*distance));
 361         camera.set_depth_clip(distance*0.02, distance*50);
 362         camera.look_at(GL::Vector3(0, 0, 0));
 363 }
 364
 365 void Viewer::update_light()
 366 {
 367         float cy = cos(light_yaw);
 368         float sy = sin(light_yaw);
 369         float cp = cos(light_pitch);
 370         float sp = sin(light_pitch);
 371         light.set_position(GL::Vector4(-cy*cp, -sy*cp, -sp, 0));
 372 }
 373
 374
 375 Viewer::Resources::Resources()
 376 {
 377         add_source(dir_source);
 378         add_source(pack_source);
 379 }
 380
 381 void Viewer::Resources::add_directory(const string &dir)
 382 {
 383         dir_source.add_directory(dir);
 384 }
 385
 386 void Viewer::Resources::add_pack(const string &pack)
 387 {
 388         pack_source.add_pack_file(pack);
 389 }