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