git.mutantstargoat.com Git - laserbrain_demo/blob - src/app.cc

   1 #include <stdio.h>
   2 #include <assert.h>
   3 #include <goatvr.h>
   4 #include "app.h"
   5 #include "opengl.h"
   6 #include "sdr.h"
   7 #include "texture.h"
   8 #include "mesh.h"
   9 #include "meshgen.h"
  10 #include "scene.h"
  11 #include "metascene.h"
  12 #include "datamap.h"
  13 #include "ui.h"
  14 #include "opt.h"
  15 #include "post.h"
  16 #include "renderer.h"
  17 #include "avatar.h"
  18 #include "vrinput.h"
  19 #include "exman.h"
  20 #include "blob_exhibit.h"
  21
  22 #define NEAR_CLIP       5.0
  23 #define FAR_CLIP        10000.0
  24
  25 static void draw_scene();
  26 static void toggle_flight();
  27 static void calc_framerate();
  28
  29 long time_msec;
  30 int win_width, win_height;
  31 float win_aspect;
  32 bool fb_srgb;
  33 bool opt_gear_wireframe;
  34
  35 TextureSet texman;
  36 SceneSet sceneman;
  37
  38 unsigned int sdr_ltmap, sdr_ltmap_notex;
  39
  40 static Avatar avatar;
  41
  42 static float cam_dist = 0.0;
  43 static float floor_y;   // last floor height
  44 static float user_eye_height = 165;
  45
  46 static float walk_speed = 300.0f;
  47 static float mouse_speed = 0.5f;
  48 static bool show_walk_mesh, noclip = false;
  49
  50 static bool have_headtracking, have_handtracking, should_swap;
  51
  52 static int prev_mx, prev_my;
  53 static bool bnstate[8];
  54 static bool keystate[256];
  55 static bool gpad_bnstate[64];
  56 static Vec2 joy_move, joy_look;
  57 static float joy_deadzone = 0.01;
  58
  59 static float framerate;
  60
  61 static Mat4 view_matrix, mouse_view_matrix, proj_matrix;
  62 static MetaScene *mscn;
  63 static unsigned int sdr_post_gamma;
  64
  65 static long prev_msec;
  66
  67 static ExhibitManager *exman;
  68 static BlobExhibit *blobs;
  69 static bool show_blobs;
  70
  71 static Renderer *rend;
  72
  73
  74 bool app_init(int argc, char **argv)
  75 {
  76         if(!init_options(argc, argv, "demo.conf")) {
  77                 return false;
  78         }
  79         app_resize(opt.width, opt.height);
  80         app_fullscreen(opt.fullscreen);
  81
  82         if(opt.vr) {
  83                 if(goatvr_init() == -1) {
  84                         return false;
  85                 }
  86                 goatvr_set_origin_mode(GOATVR_HEAD);
  87                 goatvr_set_units_scale(100.0f);
  88
  89                 goatvr_startvr();
  90                 should_swap = goatvr_should_swap() != 0;
  91                 user_eye_height = goatvr_get_eye_height();
  92                 have_headtracking = goatvr_have_headtracking();
  93                 have_handtracking = goatvr_have_handtracking();
  94
  95                 goatvr_recenter();
  96         }
  97
  98         if(fb_srgb) {
  99                 int srgb_capable;
 100                 glGetIntegerv(GL_FRAMEBUFFER_SRGB_CAPABLE_EXT, &srgb_capable);
 101                 printf("Framebuffer %s sRGB-capable\n", srgb_capable ? "is" : "is not");
 102                 if(srgb_capable) {
 103                         glEnable(GL_FRAMEBUFFER_SRGB);
 104                 } else {
 105                         fb_srgb = 0;
 106                 }
 107         }
 108
 109         glEnable(GL_MULTISAMPLE);
 110         glEnable(GL_DEPTH_TEST);
 111         glEnable(GL_CULL_FACE);
 112         glEnable(GL_LIGHTING);
 113         glEnable(GL_NORMALIZE);
 114
 115         Mesh::use_custom_sdr_attr = false;
 116
 117         float ambient[] = {0.0, 0.0, 0.0, 0.0};
 118         glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);
 119
 120         glClearColor(1, 1, 1, 1);
 121
 122         init_audio();
 123
 124         if(!init_vrhands()) {
 125                 return false;
 126         }
 127
 128         mscn = new MetaScene;
 129         if(!mscn->load(opt.scenefile ? opt.scenefile : "data/museum.scene")) {
 130                 return false;
 131         }
 132
 133         avatar.pos = mscn->start_pos;
 134         Vec3 dir = rotate(Vec3(0, 0, 1), mscn->start_rot);
 135         dir.y = 0;
 136         avatar.body_rot = rad_to_deg(acos(dot(dir, Vec3(0, 0, 1))));
 137
 138         exman = new ExhibitManager;
 139         if(!exman->load(mscn, "data/exhibits")) {
 140                 //return false;
 141         }
 142
 143         blobs = new BlobExhibit;
 144         blobs->node = new SceneNode;
 145         blobs->init();
 146         blobs->node->set_position(Vec3(-680, 160, -100));
 147         blobs->node->set_scaling(Vec3(28, 28, 28));
 148         blobs->node->update(0);
 149
 150         exman->add(blobs);
 151
 152         if(!(sdr_ltmap_notex = create_program_load("sdr/lightmap.v.glsl", "sdr/lightmap-notex.p.glsl"))) {
 153                 return false;
 154         }
 155         set_uniform_int(sdr_ltmap_notex, "texmap", MTL_TEX_DIFFUSE);
 156         set_uniform_int(sdr_ltmap_notex, "lightmap", MTL_TEX_LIGHTMAP);
 157
 158         if(!(sdr_ltmap = create_program_load("sdr/lightmap.v.glsl", "sdr/lightmap-tex.p.glsl"))) {
 159                 return false;
 160         }
 161         set_uniform_int(sdr_ltmap, "texmap", MTL_TEX_DIFFUSE);
 162         set_uniform_int(sdr_ltmap, "lightmap", MTL_TEX_LIGHTMAP);
 163
 164         if(!fb_srgb) {
 165                 sdr_post_gamma = create_program_load("sdr/post_gamma.v.glsl", "sdr/post_gamma.p.glsl");
 166         }
 167
 168         rend = new Renderer;
 169         rend->set_scene(mscn);
 170
 171         glUseProgram(0);
 172
 173         if(opt.vr || opt.fullscreen) {
 174                 app_grab_mouse(true);
 175         }
 176
 177         if(mscn->music && opt.music) {
 178                 mscn->music->play(AUDIO_PLAYMODE_LOOP);
 179         }
 180         return true;
 181 }
 182
 183 void app_cleanup()
 184 {
 185         if(mscn->music) {
 186                 mscn->music->stop();
 187         }
 188         destroy_audio();
 189
 190         app_grab_mouse(false);
 191         if(opt.vr) {
 192                 goatvr_shutdown();
 193         }
 194         destroy_vrhands();
 195
 196         delete rend;
 197
 198         delete exman;
 199
 200         texman.clear();
 201         sceneman.clear();
 202 }
 203
 204 static bool constrain_walk_mesh(const Vec3 &v, Vec3 *newv)
 205 {
 206         Mesh *wm = mscn->walk_mesh;
 207         if(!wm) {
 208                 *newv = v;
 209                 return true;
 210         }
 211
 212         Ray downray = Ray(v, Vec3(0, -1, 0));
 213         HitPoint hit;
 214         if(mscn->walk_mesh->intersect(downray, &hit)) {
 215                 *newv = hit.pos;
 216                 newv->y += user_eye_height;
 217                 return true;
 218         }
 219         return false;
 220 }
 221
 222 static void update(float dt)
 223 {
 224         texman.update();
 225         sceneman.update();
 226
 227         mscn->update(dt);
 228         exman->update(dt);
 229
 230         float speed = walk_speed * dt;
 231         Vec3 dir;
 232
 233         // joystick
 234         float jdeadsq = joy_deadzone * joy_deadzone;
 235         float jmove_lensq = length_sq(joy_move);
 236         float jlook_lensq = length_sq(joy_look);
 237
 238         if(jmove_lensq > jdeadsq) {
 239                 float len = sqrt(jmove_lensq);
 240                 jmove_lensq -= jdeadsq;
 241
 242                 float mag = len * len;
 243                 dir.x += mag * joy_move.x / len * 2.0 * speed;
 244                 dir.z += mag * joy_move.y / len * 2.0 * speed;
 245         }
 246         if(jlook_lensq > jdeadsq) {
 247                 float len = sqrt(jlook_lensq);
 248                 jlook_lensq -= jdeadsq;
 249
 250                 float mag = len * len;
 251                 avatar.body_rot += mag * joy_look.x / len * 200.0 * dt;
 252                 avatar.head_alt += mag * joy_look.y / len * 100.0 * dt;
 253                 if(avatar.head_alt < -90.0f) avatar.head_alt = -90.0f;
 254                 if(avatar.head_alt > 90.0f) avatar.head_alt = 90.0f;
 255         }
 256
 257         // keyboard move
 258         if(keystate[(int)'w']) {
 259                 dir.z -= speed;
 260         }
 261         if(keystate[(int)'s']) {
 262                 dir.z += speed;
 263         }
 264         if(keystate[(int)'d']) {
 265                 dir.x += speed;
 266         }
 267         if(keystate[(int)'a']) {
 268                 dir.x -= speed;
 269         }
 270         if(keystate[(int)'q'] || gpad_bnstate[GPAD_UP]) {
 271                 avatar.pos.y += speed;
 272         }
 273         if(keystate[(int)'z'] || gpad_bnstate[GPAD_DOWN]) {
 274                 avatar.pos.y -= speed;
 275         }
 276
 277         float theta = M_PI * avatar.body_rot / 180.0f;
 278         Vec3 newpos;
 279         newpos.x = avatar.pos.x + cos(theta) * dir.x - sin(theta) * dir.z;
 280         newpos.y = avatar.pos.y;
 281         newpos.z = avatar.pos.z + sin(theta) * dir.x + cos(theta) * dir.z;
 282
 283         if(noclip) {
 284                 avatar.pos = newpos;
 285         } else {
 286                 if(!constrain_walk_mesh(newpos, &avatar.pos)) {
 287                         float dtheta = M_PI / 32.0;
 288                         float theta = dtheta;
 289                         Vec2 dir2d = newpos.xz() - avatar.pos.xz();
 290
 291                         for(int i=0; i<16; i++) {
 292                                 Vec2 dvec = rotate(dir2d, theta);
 293                                 Vec3 pos = avatar.pos + Vec3(dvec.x, 0, dvec.y);
 294                                 if(constrain_walk_mesh(pos, &avatar.pos)) {
 295                                         break;
 296                                 }
 297                                 dvec = rotate(dir2d, -theta);
 298                                 pos = avatar.pos + Vec3(dvec.x, 0, dvec.y);
 299                                 if(constrain_walk_mesh(pos, &avatar.pos)) {
 300                                         break;
 301                                 }
 302                                 theta += dtheta;
 303                         }
 304                 }
 305                 floor_y = avatar.pos.y - user_eye_height;
 306         }
 307
 308         // TODO move to avatar
 309         // calculate mouselook view matrix
 310         mouse_view_matrix = Mat4::identity;
 311         mouse_view_matrix.pre_translate(0, 0, -cam_dist);
 312         if(!have_headtracking) {
 313                 mouse_view_matrix.pre_rotate_x(deg_to_rad(avatar.head_alt));
 314         }
 315         mouse_view_matrix.pre_rotate_y(deg_to_rad(avatar.body_rot));
 316         mouse_view_matrix.pre_translate(-avatar.pos.x, -avatar.pos.y, -avatar.pos.z);
 317
 318         // update hand-tracking
 319         if(have_handtracking) {
 320                 update_vrhands(&avatar);
 321         }
 322 }
 323
 324 static void set_light(int idx, const Vec3 &pos, const Vec3 &color)
 325 {
 326         unsigned int lt = GL_LIGHT0 + idx;
 327         float posv[] = { pos.x, pos.y, pos.z, 1 };
 328         float colv[] = { color.x, color.y, color.z, 1 };
 329
 330         glEnable(lt);
 331         glLightfv(lt, GL_POSITION, posv);
 332         glLightfv(lt, GL_DIFFUSE, colv);
 333         glLightfv(lt, GL_SPECULAR, colv);
 334 }
 335
 336 void app_display()
 337 {
 338         float dt = (float)(time_msec - prev_msec) / 1000.0f;
 339         prev_msec = time_msec;
 340
 341         if(opt.vr) {
 342                 // VR mode
 343                 goatvr_draw_start();
 344                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 345
 346                 update(dt);
 347
 348                 for(int i=0; i<2; i++) {
 349                         // for each eye
 350                         goatvr_draw_eye(i);
 351
 352                         proj_matrix = goatvr_projection_matrix(i, NEAR_CLIP, FAR_CLIP);
 353                         glMatrixMode(GL_PROJECTION);
 354                         glLoadMatrixf(proj_matrix[0]);
 355
 356                         view_matrix = mouse_view_matrix * Mat4(goatvr_view_matrix(i));
 357                         glMatrixMode(GL_MODELVIEW);
 358                         glLoadMatrixf(view_matrix[0]);
 359
 360                         draw_scene();
 361                         if(have_handtracking) {
 362                                 draw_vrhands();
 363                         }
 364                 }
 365                 goatvr_draw_done();
 366
 367                 if(should_swap) {
 368                         app_swap_buffers();
 369                 }
 370
 371         } else {
 372                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 373
 374                 update(dt);
 375
 376                 proj_matrix.perspective(deg_to_rad(50.0), win_aspect, NEAR_CLIP, FAR_CLIP);
 377                 glMatrixMode(GL_PROJECTION);
 378                 glLoadMatrixf(proj_matrix[0]);
 379
 380                 view_matrix = mouse_view_matrix;
 381                 glMatrixMode(GL_MODELVIEW);
 382                 glLoadMatrixf(view_matrix[0]);
 383
 384                 draw_scene();
 385
 386                 if(!fb_srgb && sdr_post_gamma) {
 387                         slow_post(sdr_post_gamma);
 388                         glUseProgram(0);
 389                 }
 390                 app_swap_buffers();
 391         }
 392         assert(glGetError() == GL_NO_ERROR);
 393
 394         calc_framerate();
 395 }
 396
 397
 398 static void draw_scene()
 399 {
 400         static const Vec3 lpos[] = { Vec3(-50, 75, 100), Vec3(100, 0, 30), Vec3(-10, -10, 60) };
 401         set_light(0, lpos[0], Vec3(1.0, 0.8, 0.7) * 0.8);
 402         set_light(1, lpos[1], Vec3(0.6, 0.7, 1.0) * 0.6);
 403         set_light(2, lpos[2], Vec3(0.8, 1.0, 0.8) * 0.3);
 404
 405         rend->draw();
 406
 407         if(show_blobs) {
 408                 blobs->draw();
 409         }
 410
 411         /*
 412         if(have_handtracking) {
 413                 Mat4 head_xform = inverse(mouse_view_matrix);//goatvr_head_matrix();
 414                 Mat4 head_dir_xform = head_xform.upper3x3();
 415
 416                 glUseProgram(0);
 417                 glPushAttrib(GL_ENABLE_BIT);
 418                 glDisable(GL_LIGHTING);
 419                 glBegin(GL_LINES);
 420                 for(int i=0; i<2; i++) {
 421                         if(hand[i].valid) {
 422                                 glColor3f(i, 1 - i, i);
 423                         } else {
 424                                 glColor3f(0.5, 0.5, 0.5);
 425                         }
 426                         Vec3 v = head_xform * hand[i].pos;
 427                         Vec3 dir = head_dir_xform * rotate(Vec3(0, 0, -1), hand[i].rot) * 20.0f;
 428                         Vec3 up = head_dir_xform * rotate(Vec3(0, 1, 0), hand[i].rot) * 10.0f;
 429                         Vec3 right = head_dir_xform * rotate(Vec3(1, 0, 0), hand[i].rot) * 10.0f;
 430
 431                         glVertex3f(v.x, v.y, v.z);
 432                         glVertex3f(v.x + dir.x, v.y + dir.y, v.z + dir.z);
 433                         glVertex3f(v.x - right.x, v.y - right.y, v.z - right.z);
 434                         glVertex3f(v.x + right.x, v.y + right.y, v.z + right.z);
 435                         glVertex3f(v.x - up.x, v.y - up.y, v.z - up.z);
 436                         glVertex3f(v.x + up.x, v.y + up.y, v.z + up.z);
 437                 }
 438                 glEnd();
 439                 glPopAttrib();
 440         }
 441         */
 442
 443         if(show_walk_mesh && mscn->walk_mesh) {
 444                 glPushAttrib(GL_ENABLE_BIT);
 445                 glEnable(GL_BLEND);
 446                 glBlendFunc(GL_ONE, GL_ONE);
 447                 glDisable(GL_LIGHTING);
 448                 glEnable(GL_POLYGON_OFFSET_FILL);
 449
 450                 glUseProgram(0);
 451
 452                 glPolygonOffset(-1, 1);
 453                 glDepthMask(0);
 454
 455                 glColor3f(0.3, 0.08, 0.01);
 456                 mscn->walk_mesh->draw();
 457
 458                 glDepthMask(1);
 459
 460                 glPopAttrib();
 461         }
 462
 463         print_text(Vec2(9 * win_width / 10, 20), Vec3(1, 1, 0), "fps: %.1f", framerate);
 464         draw_ui();
 465 }
 466
 467
 468 void app_reshape(int x, int y)
 469 {
 470         glViewport(0, 0, x, y);
 471         goatvr_set_fb_size(x, y, 1.0f);
 472 }
 473
 474 void app_keyboard(int key, bool pressed)
 475 {
 476         unsigned int mod = app_get_modifiers();
 477
 478         if(pressed) {
 479                 switch(key) {
 480                 case 27:
 481                         app_quit();
 482                         break;
 483
 484                 case '\n':
 485                 case '\r':
 486                         if(mod & MOD_ALT) {
 487                                 app_toggle_fullscreen();
 488                         }
 489                         break;
 490
 491                 case '`':
 492                         app_toggle_grab_mouse();
 493                         show_message("mouse %s", app_is_mouse_grabbed() ? "grabbed" : "released");
 494                         break;
 495
 496                 case 'w':
 497                         if(mod & MOD_CTRL) {
 498                                 show_walk_mesh = !show_walk_mesh;
 499                                 show_message("walk mesh: %s", show_walk_mesh ? "on" : "off");
 500                         }
 501                         break;
 502
 503                 case 'c':
 504                         if(mod & MOD_CTRL) {
 505                                 noclip = !noclip;
 506                                 show_message(noclip ? "no clip" : "clip");
 507                         }
 508                         break;
 509
 510                 case 'f':
 511                         toggle_flight();
 512                         break;
 513
 514                 case 'p':
 515                         if(mod & MOD_CTRL) {
 516                                 fb_srgb = !fb_srgb;
 517                                 show_message("gamma correction for non-sRGB framebuffers: %s\n", fb_srgb ? "off" : "on");
 518                         }
 519                         break;
 520
 521                 case '=':
 522                         walk_speed *= 1.25;
 523                         show_message("walk speed: %g", walk_speed);
 524                         break;
 525
 526                 case '-':
 527                         walk_speed *= 0.75;
 528                         show_message("walk speed: %g", walk_speed);
 529                         break;
 530
 531                 case ']':
 532                         mouse_speed *= 1.2;
 533                         show_message("mouse speed: %g", mouse_speed);
 534                         break;
 535
 536                 case '[':
 537                         mouse_speed *= 0.8;
 538                         show_message("mouse speed: %g", mouse_speed);
 539                         break;
 540
 541                 case 'b':
 542                         show_blobs = !show_blobs;
 543                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 544                         break;
 545
 546                 case ' ':
 547                         goatvr_recenter();
 548                         show_message("VR recenter\n");
 549                         break;
 550                 }
 551         }
 552
 553         if(key < 256 && !(mod & (MOD_CTRL | MOD_ALT))) {
 554                 keystate[key] = pressed;
 555         }
 556 }
 557
 558 void app_mouse_button(int bn, bool pressed, int x, int y)
 559 {
 560         prev_mx = x;
 561         prev_my = y;
 562         bnstate[bn] = pressed;
 563 }
 564
 565 static inline void mouse_look(float dx, float dy)
 566 {
 567         float scrsz = (float)win_height;
 568         avatar.body_rot += dx * 512.0 / scrsz;
 569         avatar.head_alt += dy * 512.0 / scrsz;
 570
 571         if(avatar.head_alt < -90) avatar.head_alt = -90;
 572         if(avatar.head_alt > 90) avatar.head_alt = 90;
 573 }
 574
 575 static void mouse_zoom(float dx, float dy)
 576 {
 577         cam_dist += dy * 0.1;
 578         if(cam_dist < 0.0) cam_dist = 0.0;
 579 }
 580
 581 void app_mouse_motion(int x, int y)
 582 {
 583         int dx = x - prev_mx;
 584         int dy = y - prev_my;
 585         prev_mx = x;
 586         prev_my = y;
 587
 588         if(!dx && !dy) return;
 589
 590         if(bnstate[0]) {
 591                 mouse_look(dx, dy);
 592         }
 593         if(bnstate[2]) {
 594                 mouse_zoom(dx, dy);
 595         }
 596 }
 597
 598 void app_mouse_delta(int dx, int dy)
 599 {
 600         if(bnstate[2]) {
 601                 mouse_zoom(dx * mouse_speed, dy * mouse_speed);
 602         } else {
 603                 mouse_look(dx * mouse_speed, dy * mouse_speed);
 604         }
 605 }
 606
 607 void app_gamepad_axis(int axis, float val)
 608 {
 609         switch(axis) {
 610         case 0:
 611                 joy_move.x = val;
 612                 break;
 613         case 1:
 614                 joy_move.y = val;
 615                 break;
 616
 617         case 2:
 618                 joy_look.x = val;
 619                 break;
 620         case 3:
 621                 joy_look.y = val;
 622                 break;
 623         }
 624 }
 625
 626 void app_gamepad_button(int bn, bool pressed)
 627 {
 628         gpad_bnstate[bn] = pressed;
 629
 630         if(pressed) {
 631                 switch(bn) {
 632                 case GPAD_LSTICK:
 633                         toggle_flight();
 634                         break;
 635
 636                 case GPAD_X:
 637                         show_blobs = !show_blobs;
 638                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 639                         break;
 640
 641                 case GPAD_START:
 642                         goatvr_recenter();
 643                         show_message("VR recenter\n");
 644                         break;
 645
 646                 default:
 647                         break;
 648                 }
 649         }
 650 }
 651
 652 static void toggle_flight()
 653 {
 654         static float prev_walk_speed = -1.0;
 655         if(prev_walk_speed < 0.0) {
 656                 noclip = true;
 657                 prev_walk_speed = walk_speed;
 658                 walk_speed = 1000.0;
 659                 show_message("fly mode\n");
 660         } else {
 661                 noclip = false;
 662                 walk_speed = prev_walk_speed;
 663                 prev_walk_speed = -1.0;
 664                 show_message("walk mode\n");
 665         }
 666 }
 667
 668 static void calc_framerate()
 669 {
 670         static int ncalc;
 671         static int nframes;
 672         static long prev_upd;
 673
 674         long elapsed = time_msec - prev_upd;
 675         if(elapsed >= 1000) {
 676                 framerate = (float)nframes / (float)(elapsed * 0.001);
 677                 nframes = 1;
 678                 prev_upd = time_msec;
 679
 680                 /*if(++ncalc >= 5) {
 681                         printf("fps: %f\n", framerate);
 682                         ncalc = 0;
 683                 }*/
 684         } else {
 685                 ++nframes;
 686         }
 687 }