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