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 * 2.0 * speed;
 315                 dir.z += mag * joy_move.y / len * 2.0 * 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         float theta = M_PI * avatar.body_rot / 180.0f;
 349         Vec3 newpos;
 350         newpos.x = avatar.pos.x + cos(theta) * dir.x - sin(theta) * dir.z;
 351         newpos.y = avatar.pos.y;
 352         newpos.z = avatar.pos.z + sin(theta) * dir.x + cos(theta) * dir.z;
 353
 354         if(noclip) {
 355                 avatar.pos = newpos;
 356         } else {
 357                 if(!constrain_walk_mesh(newpos, &avatar.pos)) {
 358                         float dtheta = M_PI / 32.0;
 359                         float theta = dtheta;
 360                         Vec2 dir2d = newpos.xz() - avatar.pos.xz();
 361
 362                         for(int i=0; i<16; i++) {
 363                                 Vec2 dvec = rotate(dir2d, theta);
 364                                 Vec3 pos = avatar.pos + Vec3(dvec.x, 0, dvec.y);
 365                                 if(constrain_walk_mesh(pos, &avatar.pos)) {
 366                                         break;
 367                                 }
 368                                 dvec = rotate(dir2d, -theta);
 369                                 pos = avatar.pos + Vec3(dvec.x, 0, dvec.y);
 370                                 if(constrain_walk_mesh(pos, &avatar.pos)) {
 371                                         break;
 372                                 }
 373                                 theta += dtheta;
 374                         }
 375                 }
 376                 floor_y = avatar.pos.y - user_eye_height;
 377         }
 378
 379         if(have_headtracking) {
 380                 Quat qhead;
 381                 goatvr_head_orientation(&qhead.x);
 382                 avatar.tracked_head_rotation(qhead);
 383         }
 384
 385         // TODO move to the avatar system
 386         // calculate mouselook view matrix
 387         mouse_view_matrix = Mat4::identity;
 388         mouse_view_matrix.pre_translate(0, 0, -cam_dist);
 389         if(!have_headtracking) {
 390                 mouse_view_matrix.pre_rotate_x(deg_to_rad(avatar.head_alt));
 391         }
 392         mouse_view_matrix.pre_rotate_y(deg_to_rad(avatar.body_rot));
 393         mouse_view_matrix.pre_translate(-avatar.pos.x, -avatar.pos.y, -avatar.pos.z);
 394
 395         // update hand-tracking
 396         if(have_handtracking) {
 397                 update_vrhands(&avatar);
 398
 399                 ExSelection *exsel_grab[] = { &exsel_grab_left, &exsel_grab_right };
 400                 ExhibitSlot *exslot[] = { &exslot_left, &exslot_right };
 401
 402                 for(int i=0; i<2; i++) {
 403                         if(vrhand[i].valid) {
 404                                 exslot[i]->node.set_position(vrhand[i].pos);
 405                                 exslot[i]->node.set_rotation(vrhand[i].rot * exslot[i]->grab_rot);
 406
 407                                 bool act_grab = goatvr_action(i, GOATVR_ACTION_GRAB) != 0;
 408
 409                                 ExSelection sel;
 410                                 sel = exman->select(Sphere(vrhand[i].pos, 10));
 411
 412                                 if(!*exsel_grab[i]) {
 413                                         // we don't have an exhibit grabbed
 414                                         if(act_grab) {
 415                                                 // grab an exhibit
 416                                                 *exsel_grab[i] = sel;
 417                                                 //SceneNode *objnode = sel.ex->node->find_object_node();
 418                                                 //exslot[i]->rotation = normalize(sel.ex->node->get_rotation());
 419                                                 exslot[i]->grab_rot = inverse(vrhand[i].rot);
 420                                                 exslot[i]->attach_exhibit(sel.ex, EXSLOT_ATTACH_TRANSIENT);
 421                                                 if(exsel_active) {
 422                                                         exsel_active = ExSelection::null;       // cancel active on grab
 423                                                 }
 424                                         } else {
 425                                                 // just hover
 426                                                 exsel_hover = sel;
 427                                         }
 428                                 } else {
 429                                         // we have an exhibit grabbed
 430                                         if(!act_grab) {
 431                                                 // drop it
 432                                                 Exhibit *ex = exsel_grab[i]->ex;
 433                                                 exslot[i]->detach_exhibit();
 434
 435                                                 ExhibitSlot *slot = exman->nearest_empty_slot(vrhand[i].pos, 100);
 436                                                 if(!slot) {
 437                                                         debug_log("no empty slot nearby\n");
 438                                                         if(ex->prev_slot && ex->prev_slot->empty()) {
 439                                                                 slot = ex->prev_slot;
 440                                                                 debug_log("using previous slot\n");
 441                                                         }
 442                                                 }
 443
 444                                                 if(slot) {
 445                                                         Quat rot = normalize(exslot[i]->node.get_rotation());
 446                                                         ex->node->set_rotation(rot);
 447                                                         slot->attach_exhibit(ex);
 448                                                 } else {
 449                                                         // nowhere to put it, stash it for later
 450                                                         exman->stash_exhibit(ex);
 451                                                         debug_log("no slots available, stashing\n");
 452                                                 }
 453
 454                                                 *exsel_grab[i] = ExSelection::null;
 455                                                 exslot[i]->grab_rot = Quat::identity;
 456                                         }
 457                                 }
 458                         }
 459                 }
 460
 461                 // if there are no grabs, and we're pointing with the right finger, override active
 462                 if(!exsel_grab_left && !exsel_grab_right) {
 463                         if(goatvr_action(1, GOATVR_ACTION_POINT)) {
 464                                 Ray ray;
 465                                 ray.origin = vrhand[1].pos;
 466                                 ray.dir = rotate(Vec3(0, 0, -1), vrhand[1].rot);
 467                                 exsel_active = exman->select(ray);
 468                                 pointing = true;
 469                         } else {
 470                                 exsel_active = ExSelection::null;
 471                                 pointing = false;
 472                         }
 473                 }
 474
 475         } else {
 476                 // check if an exhibit is hovered-over by mouse (only if we don't have one grabbed)
 477                 if(!exsel_grab_mouse) {
 478                         Ray ray = calc_pick_ray(prev_mx, prev_my);
 479                         exsel_hover = exman->select(ray);
 480                 }
 481
 482                 // TODO do this properly
 483                 // set the position of the left hand at a suitable position for the exhibit UI
 484                 dir = rotate(Vec3(-0.46, -0.1, -1), Vec3(0, 1, 0), deg_to_rad(-avatar.body_rot));
 485                 exslot_left.node.set_position(avatar.pos + dir * 30); // magic: distance in front
 486                 Quat rot;
 487                 rot.set_rotation(Vec3(0, 1, 0), deg_to_rad(-avatar.body_rot));
 488                 exslot_left.node.set_rotation(rot);
 489         }
 490
 491         if(!exslot_right.empty()) exslot_right.node.update(dt);
 492         // always update the left slot, because it's the anchor point of the exhibit ui
 493         exslot_left.node.update(dt);
 494
 495         // need to call this *after* we have updated the active exhibit (if any)
 496         exui_update(dt);
 497 }
 498
 499 void app_display()
 500 {
 501         float dt = (float)(time_msec - prev_msec) / 1000.0f;
 502         prev_msec = time_msec;
 503
 504         if(debug_gui) {
 505                 ImGui::GetIOPtr()->DeltaTime = dt;
 506                 ImGui::NewFrame();
 507
 508                 //ImGui::ShowTestWindow();
 509         }
 510
 511         glClearColor(1, 1, 1, 1);
 512
 513         if(opt.vr) {
 514                 // VR mode
 515                 goatvr_draw_start();
 516                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 517
 518                 unsigned int gfbo = goatvr_get_fbo();
 519
 520                 update(dt);
 521
 522                 for(int i=0; i<2; i++) {
 523                         // for each eye
 524                         goatvr_draw_eye(i);
 525                         if(gfbo) {
 526                                 vp_width = goatvr_get_fb_eye_width(i);
 527                                 vp_height = goatvr_get_fb_eye_height(i);
 528
 529                                 // this is a lightweight operation
 530                                 goatvr_rtarg->create_wrap_fbo(gfbo, vp_width, vp_height);
 531                                 push_render_target(goatvr_rtarg, RT_FAKE);
 532                         } else {
 533                                 vp_width = win_width / 2;
 534                         }
 535
 536                         proj_matrix = goatvr_projection_matrix(i, NEAR_CLIP, FAR_CLIP);
 537                         glMatrixMode(GL_PROJECTION);
 538                         glLoadMatrixf(proj_matrix[0]);
 539
 540                         view_matrix = mouse_view_matrix * Mat4(goatvr_view_matrix(i));
 541                         glMatrixMode(GL_MODELVIEW);
 542                         glLoadMatrixf(view_matrix[0]);
 543
 544                         draw_scene();
 545                         /*
 546                         if(have_handtracking) {
 547                                 draw_vrhands();
 548                         }
 549                         */
 550
 551                         if(debug_gui) {
 552                                 ImGui::Render();
 553                         }
 554
 555                         if(gfbo) {
 556                                 pop_render_target(RT_FAKE);
 557                         }
 558                 }
 559
 560                 goatvr_draw_done();
 561
 562                 vp_width = win_width;
 563                 vp_height = win_height;
 564
 565                 if(should_swap) {
 566                         app_swap_buffers();
 567                 }
 568
 569         } else {
 570                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 571
 572                 update(dt);
 573
 574                 proj_matrix.perspective(deg_to_rad(50.0), win_aspect, NEAR_CLIP, FAR_CLIP);
 575                 glMatrixMode(GL_PROJECTION);
 576                 glLoadMatrixf(proj_matrix[0]);
 577
 578                 view_matrix = mouse_view_matrix;
 579                 glMatrixMode(GL_MODELVIEW);
 580                 glLoadMatrixf(view_matrix[0]);
 581
 582                 draw_scene();
 583
 584                 if(!fb_srgb && sdr_post_gamma) {
 585                         slow_post(sdr_post_gamma);
 586                         glUseProgram(0);
 587                 }
 588
 589                 if(debug_gui) {
 590                         ImGui::Render();
 591                 }
 592                 app_swap_buffers();
 593         }
 594         assert(glGetError() == GL_NO_ERROR);
 595
 596         calc_framerate();
 597 }
 598
 599
 600 static void draw_scene()
 601 {
 602         rend->draw();
 603         exman->draw();
 604
 605         if(have_handtracking) {
 606                 glUseProgram(0);
 607                 glPushAttrib(GL_ENABLE_BIT);
 608                 glDisable(GL_LIGHTING);
 609                 glBegin(GL_LINES);
 610                 for(int i=0; i<2; i++) {
 611                         // skip drawing the left hand when we're showing the exhibit gui
 612                         if(exsel_active && i == 0) continue;
 613
 614                         if(vrhand[i].valid) {
 615                                 glColor3f(i, 1 - i, i);
 616                         } else {
 617                                 glColor3f(0.5, 0.5, 0.5);
 618                         }
 619                         Vec3 v = vrhand[i].pos;
 620                         Vec3 dir = rotate(Vec3(0, 0, -1), vrhand[i].rot) * 10.0f;
 621                         Vec3 up = rotate(Vec3(0, 1, 0), vrhand[i].rot) * 5.0f;
 622                         Vec3 right = rotate(Vec3(1, 0, 0), vrhand[i].rot) * 5.0f;
 623
 624                         if(i == 1 && pointing) {
 625                                 dir *= 1000.0f;
 626                         }
 627
 628                         glVertex3f(v.x, v.y, v.z);
 629                         glVertex3f(v.x + dir.x, v.y + dir.y, v.z + dir.z);
 630                         glVertex3f(v.x - right.x, v.y - right.y, v.z - right.z);
 631                         glVertex3f(v.x + right.x, v.y + right.y, v.z + right.z);
 632                         glVertex3f(v.x - up.x, v.y - up.y, v.z - up.z);
 633                         glVertex3f(v.x + up.x, v.y + up.y, v.z + up.z);
 634                 }
 635                 glEnd();
 636                 glPopAttrib();
 637         }
 638
 639         if(debug_gui && dbg_sel_node) {
 640                 AABox bvol = dbg_sel_node->get_bounds();
 641                 draw_geom_object(&bvol);
 642         }
 643
 644         if(show_walk_mesh && mscn->walk_mesh) {
 645                 glPushAttrib(GL_ENABLE_BIT);
 646                 glEnable(GL_BLEND);
 647                 glBlendFunc(GL_ONE, GL_ONE);
 648                 glEnable(GL_POLYGON_OFFSET_FILL);
 649
 650                 glUseProgram(0);
 651
 652                 glPolygonOffset(-1, 1);
 653                 glDepthMask(0);
 654
 655                 glColor3f(0.3, 0.08, 0.01);
 656                 mscn->walk_mesh->draw();
 657
 658                 glDepthMask(1);
 659
 660                 glPopAttrib();
 661         }
 662
 663         exui_draw();
 664
 665         print_text(Vec2(9 * win_width / 10, 20), Vec3(1, 1, 0), "fps: %.1f", framerate);
 666         draw_ui();
 667 }
 668
 669
 670 void app_reshape(int x, int y)
 671 {
 672         glViewport(0, 0, x, y);
 673         goatvr_set_fb_size(x, y, 1.0f);
 674         debug_gui_reshape(x, y);
 675
 676         vp_width = x;
 677         vp_height = y;
 678 }
 679
 680 void app_keyboard(int key, bool pressed)
 681 {
 682         unsigned int mod = app_get_modifiers();
 683
 684         if(debug_gui && !(pressed && (key == '`' || key == 27))) {
 685                 debug_gui_key(key, pressed, mod);
 686                 return; // ignore all keystrokes when GUI is visible
 687         }
 688
 689         if(pressed) {
 690                 switch(key) {
 691                 case 27:
 692                         app_quit();
 693                         break;
 694
 695                 case '\n':
 696                 case '\r':
 697                         if(mod & MOD_ALT) {
 698                                 app_toggle_fullscreen();
 699                         }
 700                         break;
 701
 702                 case '`':
 703                         debug_gui = !debug_gui;
 704                         show_message("debug gui %s", debug_gui ? "enabled" : "disabled");
 705                         break;
 706
 707                 case 'm':
 708                         app_toggle_grab_mouse();
 709                         show_message("mouse %s", app_is_mouse_grabbed() ? "grabbed" : "released");
 710                         break;
 711
 712                 case 'w':
 713                         if(mod & MOD_CTRL) {
 714                                 show_walk_mesh = !show_walk_mesh;
 715                                 show_message("walk mesh: %s", show_walk_mesh ? "on" : "off");
 716                         }
 717                         break;
 718
 719                 case 'c':
 720                         if(mod & MOD_CTRL) {
 721                                 noclip = !noclip;
 722                                 show_message(noclip ? "no clip" : "clip");
 723                         }
 724                         break;
 725
 726                 case 'f':
 727                         toggle_flight();
 728                         break;
 729
 730                 case 'p':
 731                         if(mod & MOD_CTRL) {
 732                                 fb_srgb = !fb_srgb;
 733                                 show_message("gamma correction for non-sRGB framebuffers: %s\n", fb_srgb ? "off" : "on");
 734                         }
 735                         break;
 736
 737                 case '=':
 738                         walk_speed *= 1.25;
 739                         show_message("walk speed: %g", walk_speed);
 740                         break;
 741
 742                 case '-':
 743                         walk_speed *= 0.75;
 744                         show_message("walk speed: %g", walk_speed);
 745                         break;
 746
 747                 case ']':
 748                         mouse_speed *= 1.2;
 749                         show_message("mouse speed: %g", mouse_speed);
 750                         break;
 751
 752                 case '[':
 753                         mouse_speed *= 0.8;
 754                         show_message("mouse speed: %g", mouse_speed);
 755                         break;
 756
 757                 case 'b':
 758                         show_blobs = !show_blobs;
 759                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 760                         break;
 761
 762                 case ' ':
 763                         goatvr_recenter();
 764                         show_message("VR recenter\n");
 765                         break;
 766
 767                 case KEY_UP:
 768                         exui_scroll(-1);
 769                         break;
 770
 771                 case KEY_DOWN:
 772                         exui_scroll(1);
 773                         break;
 774
 775                 case KEY_LEFT:
 776                         exui_change_tab(-1);
 777                         break;
 778
 779                 case KEY_RIGHT:
 780                         exui_change_tab(1);
 781                         break;
 782
 783                 case KEY_F5:
 784                 case KEY_F6:
 785                 case KEY_F7:
 786                 case KEY_F8:
 787                         dbg_key_pending |= 1 << (key - KEY_F5);
 788                         break;
 789                 }
 790         }
 791
 792         if(key < 256 && !(mod & (MOD_CTRL | MOD_ALT))) {
 793                 keystate[key] = pressed;
 794         }
 795 }
 796
 797 void app_mouse_button(int bn, bool pressed, int x, int y)
 798 {
 799         static int press_x, press_y;
 800
 801         if(debug_gui) {
 802                 debug_gui_mbutton(bn, pressed, x, y);
 803                 return; // ignore mouse events while GUI is visible
 804         }
 805
 806         prev_mx = x;
 807         prev_my = y;
 808         bnstate[bn] = pressed;
 809
 810         if(bn == 0) {
 811                 ExSelection sel;
 812                 Ray ray = calc_pick_ray(x, y);
 813                 sel = exman->select(ray);
 814
 815                 if(pressed) {
 816                         if(sel && (app_get_modifiers() & MOD_CTRL)) {
 817                                 exsel_grab_mouse = sel;
 818                                 Vec3 pos = sel.ex->node->get_position();
 819                                 debug_log("grabbing... (%g %g %g)\n", pos.x, pos.y, pos.z);
 820                                 exslot_mouse.node.set_position(pos);
 821                                 exslot_mouse.node.set_rotation(sel.ex->node->get_rotation());
 822                                 exslot_mouse.attach_exhibit(sel.ex, EXSLOT_ATTACH_TRANSIENT);
 823                                 if(exsel_active) {
 824                                         exsel_active = ExSelection::null;       // cancel active on grab
 825                                 }
 826                         }
 827                         press_x = x;
 828                         press_y = y;
 829
 830                 } else {
 831                         if(exsel_grab_mouse) {
 832                                 // cancel grab on mouse release
 833                                 Exhibit *ex = exsel_grab_mouse.ex;
 834                                 Vec3 pos = exslot_mouse.node.get_position();
 835
 836                                 debug_log("releasing at %g %g %g ...\n", pos.x, pos.y, pos.z);
 837
 838                                 exslot_mouse.detach_exhibit();
 839
 840                                 ExhibitSlot *slot = exman->nearest_empty_slot(pos, 100);
 841                                 if(!slot) {
 842                                         debug_log("no empty slot nearby\n");
 843                                         if(ex->prev_slot && ex->prev_slot->empty()) {
 844                                                 slot = ex->prev_slot;
 845                                                 debug_log("using previous slot\n");
 846                                         }
 847                                 }
 848
 849                                 if(slot) {
 850                                         slot->attach_exhibit(ex);
 851                                 } else {
 852                                         // nowhere to put it, so stash it for later
 853                                         exslot_mouse.detach_exhibit();
 854                                         exman->stash_exhibit(ex);
 855                                         debug_log("no slots available, stashing\n");
 856                                 }
 857
 858                                 exsel_grab_mouse = ExSelection::null;
 859                         }
 860
 861                         if(abs(press_x - x) < 5 && abs(press_y - y) < 5) {
 862                                 exsel_active = sel;     // select or deselect active exhibit
 863                                 if(sel) {
 864                                         debug_log("selecting...\n");
 865                                 } else {
 866                                         debug_log("deselecting...\n");
 867                                 }
 868                         }
 869
 870                         press_x = press_y = INT_MIN;
 871                 }
 872         }
 873 }
 874
 875 static inline void mouse_look(float dx, float dy)
 876 {
 877         float scrsz = (float)win_height;
 878         avatar.body_rot += dx * 512.0 / scrsz;
 879         avatar.head_alt += dy * 512.0 / scrsz;
 880
 881         if(avatar.head_alt < -90) avatar.head_alt = -90;
 882         if(avatar.head_alt > 90) avatar.head_alt = 90;
 883 }
 884
 885 static void mouse_zoom(float dx, float dy)
 886 {
 887         cam_dist += dy * 0.1;
 888         if(cam_dist < 0.0) cam_dist = 0.0;
 889 }
 890
 891 void app_mouse_motion(int x, int y)
 892 {
 893         if(debug_gui) {
 894                 debug_gui_mmotion(x, y);
 895                 return; // ignore mouse events while GUI is visible
 896         }
 897
 898         int dx = x - prev_mx;
 899         int dy = y - prev_my;
 900         prev_mx = x;
 901         prev_my = y;
 902
 903         if(!dx && !dy) return;
 904
 905         if(exsel_grab_mouse) {
 906                 Vec3 pos = exslot_mouse.node.get_node_position();
 907                 Vec3 dir = transpose(view_matrix.upper3x3()) * Vec3(dx * 1.0, dy * -1.0, 0);
 908
 909                 exslot_mouse.node.set_position(pos + dir);
 910         }
 911
 912         if(bnstate[2]) {
 913                 mouse_look(dx, dy);
 914         }
 915 }
 916
 917 void app_mouse_delta(int dx, int dy)
 918 {
 919         if(bnstate[2]) {
 920                 mouse_zoom(dx * mouse_speed, dy * mouse_speed);
 921         } else {
 922                 mouse_look(dx * mouse_speed, dy * mouse_speed);
 923         }
 924 }
 925
 926 void app_mouse_wheel(int dir)
 927 {
 928         if(debug_gui) {
 929                 debug_gui_wheel(dir);
 930         }
 931 }
 932
 933 void app_gamepad_axis(int axis, float val)
 934 {
 935         switch(axis) {
 936         case 0:
 937                 joy_move.x = val;
 938                 break;
 939         case 1:
 940                 joy_move.y = val;
 941                 break;
 942
 943         case 2:
 944                 joy_look.x = val;
 945                 break;
 946         case 3:
 947                 joy_look.y = val;
 948                 break;
 949         }
 950 }
 951
 952 void app_gamepad_button(int bn, bool pressed)
 953 {
 954         gpad_bnstate[bn] = pressed;
 955
 956         if(pressed) {
 957                 switch(bn) {
 958                 case GPAD_LSTICK:
 959                         toggle_flight();
 960                         break;
 961
 962                 case GPAD_X:
 963                         show_blobs = !show_blobs;
 964                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 965                         break;
 966
 967                 case GPAD_START:
 968                         goatvr_recenter();
 969                         show_message("VR recenter\n");
 970                         break;
 971
 972                 default:
 973                         break;
 974                 }
 975         }
 976 }
 977
 978 static void toggle_flight()
 979 {
 980         static float prev_walk_speed = -1.0;
 981         if(prev_walk_speed < 0.0) {
 982                 noclip = true;
 983                 prev_walk_speed = walk_speed;
 984                 walk_speed = 1000.0;
 985                 show_message("fly mode\n");
 986         } else {
 987                 noclip = false;
 988                 walk_speed = prev_walk_speed;
 989                 prev_walk_speed = -1.0;
 990                 show_message("walk mode\n");
 991         }
 992 }
 993
 994 static void calc_framerate()
 995 {
 996         //static int ncalc;
 997         static int nframes;
 998         static long prev_upd;
 999
1000         long elapsed = time_msec - prev_upd;
1001         if(elapsed >= 1000) {
1002                 framerate = (float)nframes / (float)(elapsed * 0.001);
1003                 nframes = 1;
1004                 prev_upd = time_msec;
1005
1006                 /*if(++ncalc >= 5) {
1007                         printf("fps: %f\n", framerate);
1008                         ncalc = 0;
1009                 }*/
1010         } else {
1011                 ++nframes;
1012         }
1013 }
1014
1015 static Ray calc_pick_ray(int x, int y)
1016 {
1017         float nx = (float)x / (float)win_width;
1018         float ny = (float)(win_height - y) / (float)win_height;
1019
1020         last_pick_ray = mouse_pick_ray(nx, ny, view_matrix, proj_matrix);
1021         return last_pick_ray;
1022 }