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

   1 #include <stdio.h>
   2 #include <limits.h>
   3 #include <assert.h>
   4 #include <goatvr.h>
   5 #include <assman.h>
   6 #include "app.h"
   7 #include "opengl.h"
   8 #include "sdr.h"
   9 #include "texture.h"
  10 #include "mesh.h"
  11 #include "meshgen.h"
  12 #include "scene.h"
  13 #include "metascene.h"
  14 #include "datamap.h"
  15 #include "ui.h"
  16 #include "opt.h"
  17 #include "post.h"
  18 #include "renderer.h"
  19 #include "rtarg.h"
  20 #include "avatar.h"
  21 #include "vrinput.h"
  22 #include "exman.h"
  23 #include "blob_exhibit.h"
  24 #include "dbg_gui.h"
  25 #include "geomdraw.h"
  26 #include "ui_exhibit.h"
  27
  28 #define NEAR_CLIP       5.0
  29 #define FAR_CLIP        10000.0
  30
  31 static void draw_scene();
  32 static void toggle_flight();
  33 static void calc_framerate();
  34 static Ray calc_pick_ray(int x, int y);
  35
  36 long time_msec;
  37 int win_width, win_height;
  38 int vp_width, vp_height;
  39 float win_aspect;
  40 bool fb_srgb;
  41 bool opt_gear_wireframe;
  42
  43 TextureSet texman;
  44 SceneSet sceneman;
  45
  46 int fpexcept_enabled;
  47
  48 unsigned int dbg_key_pending;
  49
  50 static Avatar avatar;
  51
  52 static float cam_dist = 0.0;
  53 static float floor_y;   // last floor height
  54 static float user_eye_height = 165;
  55
  56 static float walk_speed = 300.0f;
  57 static float mouse_speed = 0.5f;
  58 static bool show_walk_mesh, noclip = false;
  59
  60 static bool have_headtracking, have_handtracking, should_swap;
  61
  62 static int prev_mx, prev_my;
  63 static bool bnstate[8];
  64 static bool keystate[256];
  65 static bool gpad_bnstate[64];
  66 static Vec2 joy_move, joy_look;
  67 static float joy_deadzone = 0.1;
  68
  69 static float framerate;
  70
  71 static Mat4 view_matrix, mouse_view_matrix, proj_matrix;
  72 static MetaScene *mscn;
  73 static unsigned int sdr_post_gamma;
  74
  75 static long prev_msec;
  76
  77 static ExhibitManager *exman;
  78 static bool show_blobs;
  79
  80 ExSelection exsel_active, exsel_hover;
  81 ExSelection exsel_grab_left, exsel_grab_right;
  82 #define exsel_grab_mouse exsel_grab_right
  83 static ExhibitSlot exslot_left, exslot_right;
  84 #define exslot_mouse exslot_right
  85
  86 static bool pointing;
  87
  88 static Renderer *rend;
  89 static RenderTarget *goatvr_rtarg;
  90
  91 static Ray last_pick_ray;
  92
  93 static bool post_scene_init_pending = true;
  94
  95
  96 bool app_init(int argc, char **argv)
  97 {
  98         set_log_file("demo.log");
  99
 100         char *env = getenv("FPEXCEPT");
 101         if(env && atoi(env)) {
 102                 info_log("enabling floating point exceptions\n");
 103                 fpexcept_enabled = 1;
 104                 enable_fpexcept();
 105         }
 106
 107         if(init_opengl() == -1) {
 108                 return false;
 109         }
 110
 111         if(!init_options(argc, argv, "demo.conf")) {
 112                 return false;
 113         }
 114         app_resize(opt.width, opt.height);
 115         app_fullscreen(opt.fullscreen);
 116
 117         if(opt.data_url) {
 118                 info_log("Adding URL asset source: %s\n", opt.data_url);
 119                 ass_add_url("data", opt.data_url);
 120         }
 121
 122         if(opt.vr) {
 123                 if(goatvr_init() == -1) {
 124                         return false;
 125                 }
 126                 goatvr_set_origin_mode(GOATVR_HEAD);
 127                 goatvr_set_units_scale(100.0f);
 128
 129                 goatvr_startvr();
 130                 should_swap = goatvr_should_swap() != 0;
 131                 user_eye_height = goatvr_get_eye_height();
 132                 have_headtracking = goatvr_have_headtracking();
 133                 have_handtracking = goatvr_have_handtracking();
 134
 135                 goatvr_recenter();
 136
 137                 goatvr_rtarg = new RenderTarget;
 138         }
 139
 140         if(fb_srgb) {
 141                 int srgb_capable;
 142                 glGetIntegerv(GL_FRAMEBUFFER_SRGB_CAPABLE_EXT, &srgb_capable);
 143                 printf("Framebuffer %s sRGB-capable\n", srgb_capable ? "is" : "is not");
 144                 if(srgb_capable) {
 145                         glEnable(GL_FRAMEBUFFER_SRGB);
 146                 } else {
 147                         fb_srgb = 0;
 148                 }
 149         }
 150
 151         glEnable(GL_MULTISAMPLE);
 152         glEnable(GL_DEPTH_TEST);
 153         glEnable(GL_CULL_FACE);
 154         glEnable(GL_NORMALIZE);
 155
 156         if(!init_debug_gui()) {
 157                 return false;
 158         }
 159
 160         Mesh::use_custom_sdr_attr = false;
 161
 162         float ambient[] = {0.0, 0.0, 0.0, 0.0};
 163         glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);
 164
 165         init_audio();
 166
 167         if(!init_vrhands()) {
 168                 return false;
 169         }
 170
 171         mscn = new MetaScene;
 172         if(!mscn->load(opt.scenefile ? opt.scenefile : "data/museum.scene")) {
 173                 return false;
 174         }
 175
 176         avatar.pos = mscn->start_pos;
 177         Vec3 dir = rotate(Vec3(0, 0, 1), mscn->start_rot);
 178         dir.y = 0;
 179         avatar.body_rot = rad_to_deg(acos(dot(dir, Vec3(0, 0, 1))));
 180
 181         exman = new ExhibitManager;
 182         // exhibits are loaded in post_scene_init, because they need access to the scene graph
 183
 184         if(!exui_init()) {
 185                 error_log("failed to initialize exhibit ui system\n");
 186                 return false;
 187         }
 188         exui_setnode(&exslot_left.node);
 189         if(have_handtracking) {
 190                 exui_scale(2);
 191                 exui_rotation(Vec3(-deg_to_rad(35), 0, 0));
 192         }
 193
 194         if(!fb_srgb) {
 195                 sdr_post_gamma = create_program_load("sdr/post_gamma.v.glsl", "sdr/post_gamma.p.glsl");
 196         }
 197
 198         rend = new Renderer;
 199         if(!rend->init()) {
 200                 return false;
 201         }
 202         if(opt.reflect) {
 203                 rend->ropt |= RENDER_MIRRORS;
 204         } else {
 205                 rend->ropt &= ~RENDER_MIRRORS;
 206         }
 207         rend->set_scene(mscn);
 208
 209         glUseProgram(0);
 210
 211         if(opt.vr || opt.fullscreen) {
 212                 app_grab_mouse(true);
 213         }
 214
 215         if(mscn->music && opt.music) {
 216                 mscn->music->play(AUDIO_PLAYMODE_LOOP);
 217         }
 218         return true;
 219 }
 220
 221 // post_scene_init is called after the scene has completed loading
 222 static void post_scene_init()
 223 {
 224         mscn->update(0);        // update once to calculate node matrices
 225
 226         int num_mir = mscn->calc_mirror_planes();
 227         info_log("found %d mirror planes\n", num_mir);
 228
 229         exman->load(mscn, "data/exhibits");
 230 }
 231
 232 void app_cleanup()
 233 {
 234         if(mscn->music) {
 235                 mscn->music->stop();
 236         }
 237         destroy_audio();
 238
 239         app_grab_mouse(false);
 240         if(opt.vr) {
 241                 delete goatvr_rtarg;
 242                 goatvr_shutdown();
 243         }
 244         destroy_vrhands();
 245
 246         delete rend;
 247
 248         exui_shutdown();
 249
 250         /* this must be destroyed before the scene graph to detach exhibit nodes
 251          * before the scene tries to delete them recursively
 252          */
 253         delete exman;
 254
 255         texman.clear();
 256         sceneman.clear();
 257
 258         cleanup_debug_gui();
 259 }
 260
 261 static bool constrain_walk_mesh(const Vec3 &v, Vec3 *newv)
 262 {
 263         Mesh *wm = mscn->walk_mesh;
 264         if(!wm) {
 265                 *newv = v;
 266                 return true;
 267         }
 268
 269         Ray downray = Ray(v, Vec3(0, -1, 0));
 270         HitPoint hit;
 271         if(mscn->walk_mesh->intersect(downray, &hit)) {
 272                 *newv = hit.pos;
 273                 newv->y += user_eye_height;
 274                 return true;
 275         }
 276         return false;
 277 }
 278
 279 static void update(float dt)
 280 {
 281         texman.update();
 282         sceneman.update();
 283
 284         if(post_scene_init_pending && !sceneman.pending()) {
 285                 post_scene_init_pending = false;
 286                 post_scene_init();
 287         }
 288
 289         mscn->update(dt);
 290         exman->update(dt);
 291
 292         // use goatvr sticks for joystick input
 293         int num_vr_sticks = goatvr_num_sticks();
 294         if(num_vr_sticks > 0) {
 295                 float p[2];
 296                 goatvr_stick_pos(0, p);
 297                 joy_move.x = p[0];
 298                 joy_move.y = -p[1];
 299         }
 300         if(num_vr_sticks > 1) {
 301                 float p[2];
 302                 goatvr_stick_pos(1, p);
 303                 joy_look.x = p[0];
 304         }
 305
 306
 307         float speed = walk_speed * dt;
 308         Vec3 dir;
 309
 310         // joystick
 311         float jdeadsq = joy_deadzone * joy_deadzone;
 312         float jmove_lensq = length_sq(joy_move);
 313         float jlook_lensq = length_sq(joy_look);
 314
 315         if(jmove_lensq > jdeadsq) {
 316                 float len = sqrt(jmove_lensq);
 317                 jmove_lensq -= jdeadsq;
 318
 319                 float mag = len * len;
 320                 dir.x += mag * joy_move.x / len * speed;
 321                 dir.z += mag * joy_move.y / len * speed;
 322         }
 323         if(jlook_lensq > jdeadsq) {
 324                 float len = sqrt(jlook_lensq);
 325                 jlook_lensq -= jdeadsq;
 326
 327                 float mag = len * len;
 328
 329                 if(opt.min_turn > 0.0f) {
 330                         static long last_turn;
 331                         if(len > 0.5 && time_msec - last_turn > 350) {
 332                                 float sign = joy_look.x > 0.0f ? 1.0f : -1.0f;
 333                                 avatar.body_rot += opt.min_turn * sign;
 334                                 last_turn = time_msec;
 335                         }
 336                 } else {
 337                         avatar.body_rot += mag * joy_look.x / len * 200.0 * dt;
 338                 }
 339
 340                 avatar.head_alt += mag * joy_look.y / len * 100.0 * dt;
 341                 if(avatar.head_alt < -90.0f) avatar.head_alt = -90.0f;
 342                 if(avatar.head_alt > 90.0f) avatar.head_alt = 90.0f;
 343         }
 344
 345         // keyboard move
 346         if(keystate[(int)'w']) {
 347                 dir.z -= speed;
 348         }
 349         if(keystate[(int)'s']) {
 350                 dir.z += speed;
 351         }
 352         if(keystate[(int)'d']) {
 353                 dir.x += speed;
 354         }
 355         if(keystate[(int)'a']) {
 356                 dir.x -= speed;
 357         }
 358         if(keystate[(int)'q'] || gpad_bnstate[GPAD_UP]) {
 359                 avatar.pos.y += speed;
 360         }
 361         if(keystate[(int)'z'] || gpad_bnstate[GPAD_DOWN]) {
 362                 avatar.pos.y -= speed;
 363         }
 364
 365         Vec3 walk_dir = avatar.calc_walk_dir(dir.z, dir.x);
 366         Vec3 newpos = avatar.pos + walk_dir;
 367
 368         if(noclip) {
 369                 avatar.pos = newpos;
 370         } else {
 371                 if(!constrain_walk_mesh(newpos, &avatar.pos)) {
 372                         float dtheta = M_PI / 32.0;
 373                         float theta = dtheta;
 374                         Vec2 dir2d = newpos.xz() - avatar.pos.xz();
 375
 376                         for(int i=0; i<16; i++) {
 377                                 Vec2 dvec = rotate(dir2d, theta);
 378                                 Vec3 pos = avatar.pos + Vec3(dvec.x, 0, dvec.y);
 379                                 if(constrain_walk_mesh(pos, &avatar.pos)) {
 380                                         break;
 381                                 }
 382                                 dvec = rotate(dir2d, -theta);
 383                                 pos = avatar.pos + Vec3(dvec.x, 0, dvec.y);
 384                                 if(constrain_walk_mesh(pos, &avatar.pos)) {
 385                                         break;
 386                                 }
 387                                 theta += dtheta;
 388                         }
 389                 }
 390                 floor_y = avatar.pos.y - user_eye_height;
 391         }
 392
 393         if(have_headtracking) {
 394                 Quat qhead;
 395                 goatvr_head_orientation(&qhead.x);
 396                 avatar.tracked_head_rotation(qhead);
 397         }
 398
 399         // TODO move to the avatar system
 400         // calculate mouselook view matrix
 401         mouse_view_matrix = Mat4::identity;
 402         mouse_view_matrix.pre_translate(0, 0, -cam_dist);
 403         if(!have_headtracking) {
 404                 mouse_view_matrix.pre_rotate_x(deg_to_rad(avatar.head_alt));
 405         }
 406         mouse_view_matrix.pre_rotate_y(deg_to_rad(avatar.body_rot));
 407         mouse_view_matrix.pre_translate(-avatar.pos.x, -avatar.pos.y, -avatar.pos.z);
 408
 409         // update hand-tracking
 410         if(have_handtracking) {
 411                 update_vrhands(&avatar);
 412
 413                 ExSelection *exsel_grab[] = { &exsel_grab_left, &exsel_grab_right };
 414                 ExhibitSlot *exslot[] = { &exslot_left, &exslot_right };
 415
 416                 for(int i=0; i<2; i++) {
 417                         if(vrhand[i].valid) {
 418                                 exslot[i]->node.set_position(vrhand[i].pos);
 419                                 exslot[i]->node.set_rotation(vrhand[i].rot * exslot[i]->grab_rot);
 420
 421                                 bool act_grab = goatvr_action(i, GOATVR_ACTION_GRAB) != 0;
 422
 423                                 ExSelection sel;
 424                                 sel = exman->select(Sphere(vrhand[i].pos, 10));
 425
 426                                 if(!*exsel_grab[i]) {
 427                                         // we don't have an exhibit grabbed
 428                                         if(act_grab) {
 429                                                 // grab an exhibit
 430                                                 *exsel_grab[i] = sel;
 431                                                 //SceneNode *objnode = sel.ex->node->find_object_node();
 432                                                 //exslot[i]->rotation = normalize(sel.ex->node->get_rotation());
 433                                                 exslot[i]->grab_rot = inverse(vrhand[i].rot);
 434                                                 exslot[i]->attach_exhibit(sel.ex, EXSLOT_ATTACH_TRANSIENT);
 435                                                 if(exsel_active) {
 436                                                         exsel_active = ExSelection::null;       // cancel active on grab
 437                                                 }
 438                                         } else {
 439                                                 // just hover
 440                                                 exsel_hover = sel;
 441                                         }
 442                                 } else {
 443                                         // we have an exhibit grabbed
 444                                         if(!act_grab) {
 445                                                 // drop it
 446                                                 Exhibit *ex = exsel_grab[i]->ex;
 447                                                 exslot[i]->detach_exhibit();
 448
 449                                                 ExhibitSlot *slot = exman->nearest_empty_slot(vrhand[i].pos, 100);
 450                                                 if(!slot) {
 451                                                         debug_log("no empty slot nearby\n");
 452                                                         if(ex->prev_slot && ex->prev_slot->empty()) {
 453                                                                 slot = ex->prev_slot;
 454                                                                 debug_log("using previous slot\n");
 455                                                         }
 456                                                 }
 457
 458                                                 if(slot) {
 459                                                         Quat rot = normalize(exslot[i]->node.get_rotation());
 460                                                         ex->node->set_rotation(rot);
 461                                                         slot->attach_exhibit(ex);
 462                                                 } else {
 463                                                         // nowhere to put it, stash it for later
 464                                                         exman->stash_exhibit(ex);
 465                                                         debug_log("no slots available, stashing\n");
 466                                                 }
 467
 468                                                 *exsel_grab[i] = ExSelection::null;
 469                                                 exslot[i]->grab_rot = Quat::identity;
 470                                         }
 471                                 }
 472                         }
 473                 }
 474
 475                 // if there are no grabs, and we're pointing with the right finger, override active
 476                 if(!exsel_grab_left && !exsel_grab_right) {
 477                         if(goatvr_action(1, GOATVR_ACTION_POINT)) {
 478                                 Ray ray;
 479                                 ray.origin = vrhand[1].pos;
 480                                 ray.dir = rotate(Vec3(0, 0, -1), vrhand[1].rot);
 481                                 exsel_active = exman->select(ray);
 482                                 pointing = true;
 483                         } else {
 484                                 exsel_active = ExSelection::null;
 485                                 pointing = false;
 486                         }
 487                 }
 488
 489         } else {
 490                 // check if an exhibit is hovered-over by mouse (only if we don't have one grabbed)
 491                 if(!exsel_grab_mouse) {
 492                         Ray ray = calc_pick_ray(prev_mx, prev_my);
 493                         exsel_hover = exman->select(ray);
 494                 }
 495
 496                 // TODO do this properly
 497                 // set the position of the left hand at a suitable position for the exhibit UI
 498                 dir = rotate(Vec3(-0.46, -0.1, -1), Vec3(0, 1, 0), deg_to_rad(-avatar.body_rot));
 499                 exslot_left.node.set_position(avatar.pos + dir * 30); // magic: distance in front
 500                 Quat rot;
 501                 rot.set_rotation(Vec3(0, 1, 0), deg_to_rad(-avatar.body_rot));
 502                 exslot_left.node.set_rotation(rot);
 503         }
 504
 505         if(!exslot_right.empty()) exslot_right.node.update(dt);
 506         // always update the left slot, because it's the anchor point of the exhibit ui
 507         exslot_left.node.update(dt);
 508
 509         // need to call this *after* we have updated the active exhibit (if any)
 510         exui_update(dt);
 511 }
 512
 513 void app_display()
 514 {
 515         float dt = (float)(time_msec - prev_msec) / 1000.0f;
 516         prev_msec = time_msec;
 517
 518         if(debug_gui) {
 519                 ImGui::GetIOPtr()->DeltaTime = dt;
 520                 ImGui::NewFrame();
 521
 522                 //ImGui::ShowTestWindow();
 523         }
 524
 525         glClearColor(1, 1, 1, 1);
 526
 527         if(opt.vr) {
 528                 // VR mode
 529                 goatvr_draw_start();
 530                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 531
 532                 unsigned int gfbo = goatvr_get_fbo();
 533
 534                 update(dt);
 535
 536                 for(int i=0; i<2; i++) {
 537                         // for each eye
 538                         goatvr_draw_eye(i);
 539                         if(gfbo) {
 540                                 vp_width = goatvr_get_fb_eye_width(i);
 541                                 vp_height = goatvr_get_fb_eye_height(i);
 542
 543                                 // this is a lightweight operation
 544                                 goatvr_rtarg->create_wrap_fbo(gfbo, vp_width, vp_height);
 545                                 push_render_target(goatvr_rtarg, RT_FAKE);
 546                         } else {
 547                                 vp_width = win_width / 2;
 548                         }
 549
 550                         proj_matrix = goatvr_projection_matrix(i, NEAR_CLIP, FAR_CLIP);
 551                         glMatrixMode(GL_PROJECTION);
 552                         glLoadMatrixf(proj_matrix[0]);
 553
 554                         view_matrix = mouse_view_matrix * Mat4(goatvr_view_matrix(i));
 555                         glMatrixMode(GL_MODELVIEW);
 556                         glLoadMatrixf(view_matrix[0]);
 557
 558                         draw_scene();
 559                         /*
 560                         if(have_handtracking) {
 561                                 draw_vrhands();
 562                         }
 563                         */
 564
 565                         if(debug_gui) {
 566                                 ImGui::Render();
 567                         }
 568
 569                         if(gfbo) {
 570                                 pop_render_target(RT_FAKE);
 571                         }
 572                 }
 573
 574                 goatvr_draw_done();
 575
 576                 vp_width = win_width;
 577                 vp_height = win_height;
 578
 579                 if(!gfbo && !fb_srgb && sdr_post_gamma) {
 580                         glViewport(0, 0, win_width, win_height);
 581                         slow_post(sdr_post_gamma);
 582                         glUseProgram(0);
 583                 }
 584
 585                 if(should_swap) {
 586                         app_swap_buffers();
 587                 }
 588
 589         } else {
 590                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 591
 592                 update(dt);
 593
 594                 proj_matrix.perspective(deg_to_rad(50.0), win_aspect, NEAR_CLIP, FAR_CLIP);
 595                 glMatrixMode(GL_PROJECTION);
 596                 glLoadMatrixf(proj_matrix[0]);
 597
 598                 view_matrix = mouse_view_matrix;
 599                 glMatrixMode(GL_MODELVIEW);
 600                 glLoadMatrixf(view_matrix[0]);
 601
 602                 draw_scene();
 603
 604                 if(!fb_srgb && sdr_post_gamma) {
 605                         slow_post(sdr_post_gamma);
 606                         glUseProgram(0);
 607                 }
 608
 609                 if(debug_gui) {
 610                         ImGui::Render();
 611                 }
 612                 app_swap_buffers();
 613         }
 614         assert(glGetError() == GL_NO_ERROR);
 615
 616         calc_framerate();
 617 }
 618
 619
 620 static void draw_scene()
 621 {
 622         rend->draw();
 623         exman->draw();
 624
 625         if(have_handtracking) {
 626                 glUseProgram(0);
 627                 glPushAttrib(GL_ENABLE_BIT);
 628                 glDisable(GL_LIGHTING);
 629                 glBegin(GL_LINES);
 630                 for(int i=0; i<2; i++) {
 631                         // skip drawing the left hand when we're showing the exhibit gui
 632                         if(exsel_active && i == 0) continue;
 633
 634                         if(vrhand[i].valid) {
 635                                 glColor3f(i, 1 - i, i);
 636                         } else {
 637                                 glColor3f(0.5, 0.5, 0.5);
 638                         }
 639                         Vec3 v = vrhand[i].pos;
 640                         Vec3 dir = rotate(Vec3(0, 0, -1), vrhand[i].rot) * 10.0f;
 641                         Vec3 up = rotate(Vec3(0, 1, 0), vrhand[i].rot) * 5.0f;
 642                         Vec3 right = rotate(Vec3(1, 0, 0), vrhand[i].rot) * 5.0f;
 643
 644                         if(i == 1 && pointing) {
 645                                 dir *= 1000.0f;
 646                         }
 647
 648                         glVertex3f(v.x, v.y, v.z);
 649                         glVertex3f(v.x + dir.x, v.y + dir.y, v.z + dir.z);
 650                         glVertex3f(v.x - right.x, v.y - right.y, v.z - right.z);
 651                         glVertex3f(v.x + right.x, v.y + right.y, v.z + right.z);
 652                         glVertex3f(v.x - up.x, v.y - up.y, v.z - up.z);
 653                         glVertex3f(v.x + up.x, v.y + up.y, v.z + up.z);
 654                 }
 655                 glEnd();
 656                 glPopAttrib();
 657         }
 658
 659         if(debug_gui && dbg_sel_node) {
 660                 AABox bvol = dbg_sel_node->get_bounds();
 661                 draw_geom_object(&bvol);
 662         }
 663
 664         if(show_walk_mesh && mscn->walk_mesh) {
 665                 glPushAttrib(GL_ENABLE_BIT);
 666                 glEnable(GL_BLEND);
 667                 glBlendFunc(GL_ONE, GL_ONE);
 668                 glEnable(GL_POLYGON_OFFSET_FILL);
 669
 670                 glUseProgram(0);
 671
 672                 glPolygonOffset(-1, 1);
 673                 glDepthMask(0);
 674
 675                 glColor3f(0.3, 0.08, 0.01);
 676                 mscn->walk_mesh->draw();
 677
 678                 glDepthMask(1);
 679
 680                 glPopAttrib();
 681         }
 682
 683         exui_draw();
 684
 685         print_text(Vec2(9 * win_width / 10, 20), Vec3(1, 1, 0), "fps: %.1f", framerate);
 686         draw_ui();
 687 }
 688
 689
 690 void app_reshape(int x, int y)
 691 {
 692         glViewport(0, 0, x, y);
 693         goatvr_set_fb_size(x, y, 1.0f);
 694         debug_gui_reshape(x, y);
 695
 696         vp_width = x;
 697         vp_height = y;
 698 }
 699
 700 void app_keyboard(int key, bool pressed)
 701 {
 702         unsigned int mod = app_get_modifiers();
 703
 704         if(debug_gui && !(pressed && (key == '`' || key == 27))) {
 705                 debug_gui_key(key, pressed, mod);
 706                 return; // ignore all keystrokes when GUI is visible
 707         }
 708
 709         if(pressed) {
 710                 switch(key) {
 711                 case 27:
 712                         app_quit();
 713                         break;
 714
 715                 case '\n':
 716                 case '\r':
 717                         if(mod & MOD_ALT) {
 718                                 app_toggle_fullscreen();
 719                         }
 720                         break;
 721
 722                 case '`':
 723                         debug_gui = !debug_gui;
 724                         show_message("debug gui %s", debug_gui ? "enabled" : "disabled");
 725                         break;
 726
 727                 case 'm':
 728                         app_toggle_grab_mouse();
 729                         show_message("mouse %s", app_is_mouse_grabbed() ? "grabbed" : "released");
 730                         break;
 731
 732                 case 'w':
 733                         if(mod & MOD_CTRL) {
 734                                 show_walk_mesh = !show_walk_mesh;
 735                                 show_message("walk mesh: %s", show_walk_mesh ? "on" : "off");
 736                         }
 737                         break;
 738
 739                 case 'c':
 740                         if(mod & MOD_CTRL) {
 741                                 noclip = !noclip;
 742                                 show_message(noclip ? "no clip" : "clip");
 743                         }
 744                         break;
 745
 746                 case 'f':
 747                         toggle_flight();
 748                         break;
 749
 750                 case 'p':
 751                         if(mod & MOD_CTRL) {
 752                                 fb_srgb = !fb_srgb;
 753                                 show_message("gamma correction for non-sRGB framebuffers: %s\n", fb_srgb ? "off" : "on");
 754                         }
 755                         break;
 756
 757                 case '=':
 758                         walk_speed *= 1.25;
 759                         show_message("walk speed: %g", walk_speed);
 760                         break;
 761
 762                 case '-':
 763                         walk_speed *= 0.75;
 764                         show_message("walk speed: %g", walk_speed);
 765                         break;
 766
 767                 case ']':
 768                         mouse_speed *= 1.2;
 769                         show_message("mouse speed: %g", mouse_speed);
 770                         break;
 771
 772                 case '[':
 773                         mouse_speed *= 0.8;
 774                         show_message("mouse speed: %g", mouse_speed);
 775                         break;
 776
 777                 case 'b':
 778                         show_blobs = !show_blobs;
 779                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 780                         break;
 781
 782                 case ' ':
 783                         goatvr_recenter();
 784                         show_message("VR recenter\n");
 785                         break;
 786
 787                 case KEY_UP:
 788                         exui_scroll(-1);
 789                         break;
 790
 791                 case KEY_DOWN:
 792                         exui_scroll(1);
 793                         break;
 794
 795                 case KEY_LEFT:
 796                         exui_change_tab(-1);
 797                         break;
 798
 799                 case KEY_RIGHT:
 800                         exui_change_tab(1);
 801                         break;
 802
 803                 case '\t':
 804                         if(exsel_grab_mouse) {
 805                                 Exhibit *ex = exsel_grab_mouse.ex;
 806                                 exslot_mouse.detach_exhibit();
 807                                 exman->stash_exhibit(ex);
 808                                 exsel_grab_mouse = ExSelection::null;
 809                         } else {
 810                                 Exhibit *ex = exman->unstash_exhibit();
 811                                 if(ex) {
 812                                         exslot_mouse.attach_exhibit(ex, EXSLOT_ATTACH_TRANSIENT);
 813                                         exsel_grab_mouse = ex;
 814
 815                                         Vec3 fwd = avatar.get_body_fwd();
 816                                         exslot_mouse.node.set_position(avatar.pos + fwd * 100);
 817                                 }
 818                         }
 819                         break;
 820
 821                 case KEY_F5:
 822                 case KEY_F6:
 823                 case KEY_F7:
 824                 case KEY_F8:
 825                         dbg_key_pending |= 1 << (key - KEY_F5);
 826                         break;
 827                 }
 828         }
 829
 830         if(key < 256 && !(mod & (MOD_CTRL | MOD_ALT))) {
 831                 keystate[key] = pressed;
 832         }
 833 }
 834
 835 void app_mouse_button(int bn, bool pressed, int x, int y)
 836 {
 837         static int press_x, press_y;
 838
 839         if(debug_gui) {
 840                 debug_gui_mbutton(bn, pressed, x, y);
 841                 return; // ignore mouse events while GUI is visible
 842         }
 843
 844         prev_mx = x;
 845         prev_my = y;
 846         bnstate[bn] = pressed;
 847
 848         if(bn == 0) {
 849                 ExSelection sel;
 850                 Ray ray = calc_pick_ray(x, y);
 851                 sel = exman->select(ray);
 852
 853                 if(pressed) {
 854                         if(sel && (app_get_modifiers() & MOD_CTRL)) {
 855                                 exsel_grab_mouse = sel;
 856                                 Vec3 pos = sel.ex->node->get_position();
 857                                 debug_log("grabbing... (%g %g %g)\n", pos.x, pos.y, pos.z);
 858                                 exslot_mouse.node.set_position(pos);
 859                                 exslot_mouse.node.set_rotation(sel.ex->node->get_rotation());
 860                                 exslot_mouse.attach_exhibit(sel.ex, EXSLOT_ATTACH_TRANSIENT);
 861                                 if(exsel_active) {
 862                                         exsel_active = ExSelection::null;       // cancel active on grab
 863                                 }
 864                         }
 865                         press_x = x;
 866                         press_y = y;
 867
 868                 } else {
 869                         if(exsel_grab_mouse) {
 870                                 // cancel grab on mouse release
 871                                 Exhibit *ex = exsel_grab_mouse.ex;
 872                                 Vec3 pos = exslot_mouse.node.get_position();
 873
 874                                 debug_log("releasing at %g %g %g ...\n", pos.x, pos.y, pos.z);
 875
 876                                 exslot_mouse.detach_exhibit();
 877
 878                                 ExhibitSlot *slot = exman->nearest_empty_slot(pos, 300);
 879                                 if(!slot) {
 880                                         debug_log("no empty slot nearby\n");
 881                                         if(ex->prev_slot && ex->prev_slot->empty()) {
 882                                                 slot = ex->prev_slot;
 883                                                 debug_log("using previous slot\n");
 884                                         }
 885                                 }
 886
 887                                 if(slot) {
 888                                         slot->attach_exhibit(ex);
 889                                 } else {
 890                                         // nowhere to put it, so stash it for later
 891                                         exslot_mouse.detach_exhibit();
 892                                         exman->stash_exhibit(ex);
 893                                         debug_log("no slots available, stashing\n");
 894                                 }
 895
 896                                 exsel_grab_mouse = ExSelection::null;
 897                         }
 898
 899                         if(abs(press_x - x) < 5 && abs(press_y - y) < 5) {
 900                                 exsel_active = sel;     // select or deselect active exhibit
 901                                 if(sel) {
 902                                         debug_log("selecting...\n");
 903                                 } else {
 904                                         debug_log("deselecting...\n");
 905                                 }
 906                         }
 907
 908                         press_x = press_y = INT_MIN;
 909                 }
 910         }
 911 }
 912
 913 static inline void mouse_look(float dx, float dy)
 914 {
 915         float scrsz = (float)win_height;
 916         avatar.set_body_rotation(avatar.body_rot + dx * 512.0 / scrsz);
 917         avatar.head_alt += dy * 512.0 / scrsz;
 918
 919         if(avatar.head_alt < -90) avatar.head_alt = -90;
 920         if(avatar.head_alt > 90) avatar.head_alt = 90;
 921 }
 922
 923 static void mouse_zoom(float dx, float dy)
 924 {
 925         cam_dist += dy * 0.1;
 926         if(cam_dist < 0.0) cam_dist = 0.0;
 927 }
 928
 929 void app_mouse_motion(int x, int y)
 930 {
 931         if(debug_gui) {
 932                 debug_gui_mmotion(x, y);
 933                 return; // ignore mouse events while GUI is visible
 934         }
 935
 936         int dx = x - prev_mx;
 937         int dy = y - prev_my;
 938         prev_mx = x;
 939         prev_my = y;
 940
 941         if(!dx && !dy) return;
 942
 943         if(exsel_grab_mouse) {
 944                 Vec3 pos = exslot_mouse.node.get_node_position();
 945                 Vec3 dir = transpose(view_matrix.upper3x3()) * Vec3(dx * 1.0, dy * -1.0, 0);
 946
 947                 exslot_mouse.node.set_position(pos + dir);
 948         }
 949
 950         if(bnstate[2]) {
 951                 mouse_look(dx, dy);
 952         }
 953 }
 954
 955 void app_mouse_delta(int dx, int dy)
 956 {
 957         if(bnstate[2]) {
 958                 mouse_zoom(dx * mouse_speed, dy * mouse_speed);
 959         } else {
 960                 mouse_look(dx * mouse_speed, dy * mouse_speed);
 961         }
 962 }
 963
 964 void app_mouse_wheel(int dir)
 965 {
 966         if(debug_gui) {
 967                 debug_gui_wheel(dir);
 968         }
 969 }
 970
 971 void app_gamepad_axis(int axis, float val)
 972 {
 973         switch(axis) {
 974         case 0:
 975                 joy_move.x = val;
 976                 break;
 977         case 1:
 978                 joy_move.y = val;
 979                 break;
 980
 981         case 2:
 982                 joy_look.x = val;
 983                 break;
 984         case 3:
 985                 joy_look.y = val;
 986                 break;
 987         }
 988 }
 989
 990 void app_gamepad_button(int bn, bool pressed)
 991 {
 992         gpad_bnstate[bn] = pressed;
 993
 994         if(pressed) {
 995                 switch(bn) {
 996                 case GPAD_LSTICK:
 997                         toggle_flight();
 998                         break;
 999
1000                 case GPAD_X:
1001                         show_blobs = !show_blobs;
1002                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
1003                         break;
1004
1005                 case GPAD_START:
1006                         goatvr_recenter();
1007                         show_message("VR recenter\n");
1008                         break;
1009
1010                 default:
1011                         break;
1012                 }
1013         }
1014 }
1015
1016 static void toggle_flight()
1017 {
1018         static float prev_walk_speed = -1.0;
1019         if(prev_walk_speed < 0.0) {
1020                 noclip = true;
1021                 prev_walk_speed = walk_speed;
1022                 walk_speed = 1000.0;
1023                 show_message("fly mode\n");
1024         } else {
1025                 noclip = false;
1026                 walk_speed = prev_walk_speed;
1027                 prev_walk_speed = -1.0;
1028                 show_message("walk mode\n");
1029         }
1030 }
1031
1032 static void calc_framerate()
1033 {
1034         //static int ncalc;
1035         static int nframes;
1036         static long prev_upd;
1037
1038         long elapsed = time_msec - prev_upd;
1039         if(elapsed >= 1000) {
1040                 framerate = (float)nframes / (float)(elapsed * 0.001);
1041                 nframes = 1;
1042                 prev_upd = time_msec;
1043
1044                 /*if(++ncalc >= 5) {
1045                         printf("fps: %f\n", framerate);
1046                         ncalc = 0;
1047                 }*/
1048         } else {
1049                 ++nframes;
1050         }
1051 }
1052
1053 static Ray calc_pick_ray(int x, int y)
1054 {
1055         float nx = (float)x / (float)win_width;
1056         float ny = (float)(win_height - y) / (float)win_height;
1057
1058         last_pick_ray = mouse_pick_ray(nx, ny, view_matrix, proj_matrix);
1059         return last_pick_ray;
1060 }