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 = 0.01;
  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                 avatar.body_rot += mag * joy_look.x / len * 200.0 * dt;
 329                 avatar.head_alt += mag * joy_look.y / len * 100.0 * dt;
 330                 if(avatar.head_alt < -90.0f) avatar.head_alt = -90.0f;
 331                 if(avatar.head_alt > 90.0f) avatar.head_alt = 90.0f;
 332         }
 333
 334         // keyboard move
 335         if(keystate[(int)'w']) {
 336                 dir.z -= speed;
 337         }
 338         if(keystate[(int)'s']) {
 339                 dir.z += speed;
 340         }
 341         if(keystate[(int)'d']) {
 342                 dir.x += speed;
 343         }
 344         if(keystate[(int)'a']) {
 345                 dir.x -= speed;
 346         }
 347         if(keystate[(int)'q'] || gpad_bnstate[GPAD_UP]) {
 348                 avatar.pos.y += speed;
 349         }
 350         if(keystate[(int)'z'] || gpad_bnstate[GPAD_DOWN]) {
 351                 avatar.pos.y -= speed;
 352         }
 353
 354         Vec3 walk_dir = avatar.calc_walk_dir(dir.z, dir.x);
 355         Vec3 newpos = avatar.pos + walk_dir;
 356
 357         if(noclip) {
 358                 avatar.pos = newpos;
 359         } else {
 360                 if(!constrain_walk_mesh(newpos, &avatar.pos)) {
 361                         float dtheta = M_PI / 32.0;
 362                         float theta = dtheta;
 363                         Vec2 dir2d = newpos.xz() - avatar.pos.xz();
 364
 365                         for(int i=0; i<16; i++) {
 366                                 Vec2 dvec = rotate(dir2d, theta);
 367                                 Vec3 pos = avatar.pos + Vec3(dvec.x, 0, dvec.y);
 368                                 if(constrain_walk_mesh(pos, &avatar.pos)) {
 369                                         break;
 370                                 }
 371                                 dvec = rotate(dir2d, -theta);
 372                                 pos = avatar.pos + Vec3(dvec.x, 0, dvec.y);
 373                                 if(constrain_walk_mesh(pos, &avatar.pos)) {
 374                                         break;
 375                                 }
 376                                 theta += dtheta;
 377                         }
 378                 }
 379                 floor_y = avatar.pos.y - user_eye_height;
 380         }
 381
 382         if(have_headtracking) {
 383                 Quat qhead;
 384                 goatvr_head_orientation(&qhead.x);
 385                 avatar.tracked_head_rotation(qhead);
 386         }
 387
 388         // TODO move to the avatar system
 389         // calculate mouselook view matrix
 390         mouse_view_matrix = Mat4::identity;
 391         mouse_view_matrix.pre_translate(0, 0, -cam_dist);
 392         if(!have_headtracking) {
 393                 mouse_view_matrix.pre_rotate_x(deg_to_rad(avatar.head_alt));
 394         }
 395         mouse_view_matrix.pre_rotate_y(deg_to_rad(avatar.body_rot));
 396         mouse_view_matrix.pre_translate(-avatar.pos.x, -avatar.pos.y, -avatar.pos.z);
 397
 398         // update hand-tracking
 399         if(have_handtracking) {
 400                 update_vrhands(&avatar);
 401
 402                 ExSelection *exsel_grab[] = { &exsel_grab_left, &exsel_grab_right };
 403                 ExhibitSlot *exslot[] = { &exslot_left, &exslot_right };
 404
 405                 for(int i=0; i<2; i++) {
 406                         if(vrhand[i].valid) {
 407                                 exslot[i]->node.set_position(vrhand[i].pos);
 408                                 exslot[i]->node.set_rotation(vrhand[i].rot * exslot[i]->grab_rot);
 409
 410                                 bool act_grab = goatvr_action(i, GOATVR_ACTION_GRAB) != 0;
 411
 412                                 ExSelection sel;
 413                                 sel = exman->select(Sphere(vrhand[i].pos, 10));
 414
 415                                 if(!*exsel_grab[i]) {
 416                                         // we don't have an exhibit grabbed
 417                                         if(act_grab) {
 418                                                 // grab an exhibit
 419                                                 *exsel_grab[i] = sel;
 420                                                 //SceneNode *objnode = sel.ex->node->find_object_node();
 421                                                 //exslot[i]->rotation = normalize(sel.ex->node->get_rotation());
 422                                                 exslot[i]->grab_rot = inverse(vrhand[i].rot);
 423                                                 exslot[i]->attach_exhibit(sel.ex, EXSLOT_ATTACH_TRANSIENT);
 424                                                 if(exsel_active) {
 425                                                         exsel_active = ExSelection::null;       // cancel active on grab
 426                                                 }
 427                                         } else {
 428                                                 // just hover
 429                                                 exsel_hover = sel;
 430                                         }
 431                                 } else {
 432                                         // we have an exhibit grabbed
 433                                         if(!act_grab) {
 434                                                 // drop it
 435                                                 Exhibit *ex = exsel_grab[i]->ex;
 436                                                 exslot[i]->detach_exhibit();
 437
 438                                                 ExhibitSlot *slot = exman->nearest_empty_slot(vrhand[i].pos, 100);
 439                                                 if(!slot) {
 440                                                         debug_log("no empty slot nearby\n");
 441                                                         if(ex->prev_slot && ex->prev_slot->empty()) {
 442                                                                 slot = ex->prev_slot;
 443                                                                 debug_log("using previous slot\n");
 444                                                         }
 445                                                 }
 446
 447                                                 if(slot) {
 448                                                         Quat rot = normalize(exslot[i]->node.get_rotation());
 449                                                         ex->node->set_rotation(rot);
 450                                                         slot->attach_exhibit(ex);
 451                                                 } else {
 452                                                         // nowhere to put it, stash it for later
 453                                                         exman->stash_exhibit(ex);
 454                                                         debug_log("no slots available, stashing\n");
 455                                                 }
 456
 457                                                 *exsel_grab[i] = ExSelection::null;
 458                                                 exslot[i]->grab_rot = Quat::identity;
 459                                         }
 460                                 }
 461                         }
 462                 }
 463
 464                 // if there are no grabs, and we're pointing with the right finger, override active
 465                 if(!exsel_grab_left && !exsel_grab_right) {
 466                         if(goatvr_action(1, GOATVR_ACTION_POINT)) {
 467                                 Ray ray;
 468                                 ray.origin = vrhand[1].pos;
 469                                 ray.dir = rotate(Vec3(0, 0, -1), vrhand[1].rot);
 470                                 exsel_active = exman->select(ray);
 471                                 pointing = true;
 472                         } else {
 473                                 exsel_active = ExSelection::null;
 474                                 pointing = false;
 475                         }
 476                 }
 477
 478         } else {
 479                 // check if an exhibit is hovered-over by mouse (only if we don't have one grabbed)
 480                 if(!exsel_grab_mouse) {
 481                         Ray ray = calc_pick_ray(prev_mx, prev_my);
 482                         exsel_hover = exman->select(ray);
 483                 }
 484
 485                 // TODO do this properly
 486                 // set the position of the left hand at a suitable position for the exhibit UI
 487                 dir = rotate(Vec3(-0.46, -0.1, -1), Vec3(0, 1, 0), deg_to_rad(-avatar.body_rot));
 488                 exslot_left.node.set_position(avatar.pos + dir * 30); // magic: distance in front
 489                 Quat rot;
 490                 rot.set_rotation(Vec3(0, 1, 0), deg_to_rad(-avatar.body_rot));
 491                 exslot_left.node.set_rotation(rot);
 492         }
 493
 494         if(!exslot_right.empty()) exslot_right.node.update(dt);
 495         // always update the left slot, because it's the anchor point of the exhibit ui
 496         exslot_left.node.update(dt);
 497
 498         // need to call this *after* we have updated the active exhibit (if any)
 499         exui_update(dt);
 500 }
 501
 502 void app_display()
 503 {
 504         float dt = (float)(time_msec - prev_msec) / 1000.0f;
 505         prev_msec = time_msec;
 506
 507         if(debug_gui) {
 508                 ImGui::GetIOPtr()->DeltaTime = dt;
 509                 ImGui::NewFrame();
 510
 511                 //ImGui::ShowTestWindow();
 512         }
 513
 514         glClearColor(1, 1, 1, 1);
 515
 516         if(opt.vr) {
 517                 // VR mode
 518                 goatvr_draw_start();
 519                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 520
 521                 unsigned int gfbo = goatvr_get_fbo();
 522
 523                 update(dt);
 524
 525                 for(int i=0; i<2; i++) {
 526                         // for each eye
 527                         goatvr_draw_eye(i);
 528                         if(gfbo) {
 529                                 vp_width = goatvr_get_fb_eye_width(i);
 530                                 vp_height = goatvr_get_fb_eye_height(i);
 531
 532                                 // this is a lightweight operation
 533                                 goatvr_rtarg->create_wrap_fbo(gfbo, vp_width, vp_height);
 534                                 push_render_target(goatvr_rtarg, RT_FAKE);
 535                         } else {
 536                                 vp_width = win_width / 2;
 537                         }
 538
 539                         proj_matrix = goatvr_projection_matrix(i, NEAR_CLIP, FAR_CLIP);
 540                         glMatrixMode(GL_PROJECTION);
 541                         glLoadMatrixf(proj_matrix[0]);
 542
 543                         view_matrix = mouse_view_matrix * Mat4(goatvr_view_matrix(i));
 544                         glMatrixMode(GL_MODELVIEW);
 545                         glLoadMatrixf(view_matrix[0]);
 546
 547                         draw_scene();
 548                         /*
 549                         if(have_handtracking) {
 550                                 draw_vrhands();
 551                         }
 552                         */
 553
 554                         if(debug_gui) {
 555                                 ImGui::Render();
 556                         }
 557
 558                         if(gfbo) {
 559                                 pop_render_target(RT_FAKE);
 560                         }
 561                 }
 562
 563                 goatvr_draw_done();
 564
 565                 vp_width = win_width;
 566                 vp_height = win_height;
 567
 568                 if(!gfbo && !fb_srgb && sdr_post_gamma) {
 569                         glViewport(0, 0, win_width, win_height);
 570                         slow_post(sdr_post_gamma);
 571                         glUseProgram(0);
 572                 }
 573
 574                 if(should_swap) {
 575                         app_swap_buffers();
 576                 }
 577
 578         } else {
 579                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 580
 581                 update(dt);
 582
 583                 proj_matrix.perspective(deg_to_rad(50.0), win_aspect, NEAR_CLIP, FAR_CLIP);
 584                 glMatrixMode(GL_PROJECTION);
 585                 glLoadMatrixf(proj_matrix[0]);
 586
 587                 view_matrix = mouse_view_matrix;
 588                 glMatrixMode(GL_MODELVIEW);
 589                 glLoadMatrixf(view_matrix[0]);
 590
 591                 draw_scene();
 592
 593                 if(!fb_srgb && sdr_post_gamma) {
 594                         slow_post(sdr_post_gamma);
 595                         glUseProgram(0);
 596                 }
 597
 598                 if(debug_gui) {
 599                         ImGui::Render();
 600                 }
 601                 app_swap_buffers();
 602         }
 603         assert(glGetError() == GL_NO_ERROR);
 604
 605         calc_framerate();
 606 }
 607
 608
 609 static void draw_scene()
 610 {
 611         rend->draw();
 612         exman->draw();
 613
 614         if(have_handtracking) {
 615                 glUseProgram(0);
 616                 glPushAttrib(GL_ENABLE_BIT);
 617                 glDisable(GL_LIGHTING);
 618                 glBegin(GL_LINES);
 619                 for(int i=0; i<2; i++) {
 620                         // skip drawing the left hand when we're showing the exhibit gui
 621                         if(exsel_active && i == 0) continue;
 622
 623                         if(vrhand[i].valid) {
 624                                 glColor3f(i, 1 - i, i);
 625                         } else {
 626                                 glColor3f(0.5, 0.5, 0.5);
 627                         }
 628                         Vec3 v = vrhand[i].pos;
 629                         Vec3 dir = rotate(Vec3(0, 0, -1), vrhand[i].rot) * 10.0f;
 630                         Vec3 up = rotate(Vec3(0, 1, 0), vrhand[i].rot) * 5.0f;
 631                         Vec3 right = rotate(Vec3(1, 0, 0), vrhand[i].rot) * 5.0f;
 632
 633                         if(i == 1 && pointing) {
 634                                 dir *= 1000.0f;
 635                         }
 636
 637                         glVertex3f(v.x, v.y, v.z);
 638                         glVertex3f(v.x + dir.x, v.y + dir.y, v.z + dir.z);
 639                         glVertex3f(v.x - right.x, v.y - right.y, v.z - right.z);
 640                         glVertex3f(v.x + right.x, v.y + right.y, v.z + right.z);
 641                         glVertex3f(v.x - up.x, v.y - up.y, v.z - up.z);
 642                         glVertex3f(v.x + up.x, v.y + up.y, v.z + up.z);
 643                 }
 644                 glEnd();
 645                 glPopAttrib();
 646         }
 647
 648         if(debug_gui && dbg_sel_node) {
 649                 AABox bvol = dbg_sel_node->get_bounds();
 650                 draw_geom_object(&bvol);
 651         }
 652
 653         if(show_walk_mesh && mscn->walk_mesh) {
 654                 glPushAttrib(GL_ENABLE_BIT);
 655                 glEnable(GL_BLEND);
 656                 glBlendFunc(GL_ONE, GL_ONE);
 657                 glEnable(GL_POLYGON_OFFSET_FILL);
 658
 659                 glUseProgram(0);
 660
 661                 glPolygonOffset(-1, 1);
 662                 glDepthMask(0);
 663
 664                 glColor3f(0.3, 0.08, 0.01);
 665                 mscn->walk_mesh->draw();
 666
 667                 glDepthMask(1);
 668
 669                 glPopAttrib();
 670         }
 671
 672         exui_draw();
 673
 674         print_text(Vec2(9 * win_width / 10, 20), Vec3(1, 1, 0), "fps: %.1f", framerate);
 675         draw_ui();
 676 }
 677
 678
 679 void app_reshape(int x, int y)
 680 {
 681         glViewport(0, 0, x, y);
 682         goatvr_set_fb_size(x, y, 1.0f);
 683         debug_gui_reshape(x, y);
 684
 685         vp_width = x;
 686         vp_height = y;
 687 }
 688
 689 void app_keyboard(int key, bool pressed)
 690 {
 691         unsigned int mod = app_get_modifiers();
 692
 693         if(debug_gui && !(pressed && (key == '`' || key == 27))) {
 694                 debug_gui_key(key, pressed, mod);
 695                 return; // ignore all keystrokes when GUI is visible
 696         }
 697
 698         if(pressed) {
 699                 switch(key) {
 700                 case 27:
 701                         app_quit();
 702                         break;
 703
 704                 case '\n':
 705                 case '\r':
 706                         if(mod & MOD_ALT) {
 707                                 app_toggle_fullscreen();
 708                         }
 709                         break;
 710
 711                 case '`':
 712                         debug_gui = !debug_gui;
 713                         show_message("debug gui %s", debug_gui ? "enabled" : "disabled");
 714                         break;
 715
 716                 case 'm':
 717                         app_toggle_grab_mouse();
 718                         show_message("mouse %s", app_is_mouse_grabbed() ? "grabbed" : "released");
 719                         break;
 720
 721                 case 'w':
 722                         if(mod & MOD_CTRL) {
 723                                 show_walk_mesh = !show_walk_mesh;
 724                                 show_message("walk mesh: %s", show_walk_mesh ? "on" : "off");
 725                         }
 726                         break;
 727
 728                 case 'c':
 729                         if(mod & MOD_CTRL) {
 730                                 noclip = !noclip;
 731                                 show_message(noclip ? "no clip" : "clip");
 732                         }
 733                         break;
 734
 735                 case 'f':
 736                         toggle_flight();
 737                         break;
 738
 739                 case 'p':
 740                         if(mod & MOD_CTRL) {
 741                                 fb_srgb = !fb_srgb;
 742                                 show_message("gamma correction for non-sRGB framebuffers: %s\n", fb_srgb ? "off" : "on");
 743                         }
 744                         break;
 745
 746                 case '=':
 747                         walk_speed *= 1.25;
 748                         show_message("walk speed: %g", walk_speed);
 749                         break;
 750
 751                 case '-':
 752                         walk_speed *= 0.75;
 753                         show_message("walk speed: %g", walk_speed);
 754                         break;
 755
 756                 case ']':
 757                         mouse_speed *= 1.2;
 758                         show_message("mouse speed: %g", mouse_speed);
 759                         break;
 760
 761                 case '[':
 762                         mouse_speed *= 0.8;
 763                         show_message("mouse speed: %g", mouse_speed);
 764                         break;
 765
 766                 case 'b':
 767                         show_blobs = !show_blobs;
 768                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 769                         break;
 770
 771                 case ' ':
 772                         goatvr_recenter();
 773                         show_message("VR recenter\n");
 774                         break;
 775
 776                 case KEY_UP:
 777                         exui_scroll(-1);
 778                         break;
 779
 780                 case KEY_DOWN:
 781                         exui_scroll(1);
 782                         break;
 783
 784                 case KEY_LEFT:
 785                         exui_change_tab(-1);
 786                         break;
 787
 788                 case KEY_RIGHT:
 789                         exui_change_tab(1);
 790                         break;
 791
 792                 case '\t':
 793                         if(exsel_grab_mouse) {
 794                                 Exhibit *ex = exsel_grab_mouse.ex;
 795                                 exslot_mouse.detach_exhibit();
 796                                 exman->stash_exhibit(ex);
 797                                 exsel_grab_mouse = ExSelection::null;
 798                         } else {
 799                                 Exhibit *ex = exman->unstash_exhibit();
 800                                 if(ex) {
 801                                         exslot_mouse.attach_exhibit(ex, EXSLOT_ATTACH_TRANSIENT);
 802                                         exsel_grab_mouse = ex;
 803
 804                                         Vec3 fwd = avatar.get_body_fwd();
 805                                         exslot_mouse.node.set_position(avatar.pos + fwd * 100);
 806                                 }
 807                         }
 808                         break;
 809
 810                 case KEY_F5:
 811                 case KEY_F6:
 812                 case KEY_F7:
 813                 case KEY_F8:
 814                         dbg_key_pending |= 1 << (key - KEY_F5);
 815                         break;
 816                 }
 817         }
 818
 819         if(key < 256 && !(mod & (MOD_CTRL | MOD_ALT))) {
 820                 keystate[key] = pressed;
 821         }
 822 }
 823
 824 void app_mouse_button(int bn, bool pressed, int x, int y)
 825 {
 826         static int press_x, press_y;
 827
 828         if(debug_gui) {
 829                 debug_gui_mbutton(bn, pressed, x, y);
 830                 return; // ignore mouse events while GUI is visible
 831         }
 832
 833         prev_mx = x;
 834         prev_my = y;
 835         bnstate[bn] = pressed;
 836
 837         if(bn == 0) {
 838                 ExSelection sel;
 839                 Ray ray = calc_pick_ray(x, y);
 840                 sel = exman->select(ray);
 841
 842                 if(pressed) {
 843                         if(sel && (app_get_modifiers() & MOD_CTRL)) {
 844                                 exsel_grab_mouse = sel;
 845                                 Vec3 pos = sel.ex->node->get_position();
 846                                 debug_log("grabbing... (%g %g %g)\n", pos.x, pos.y, pos.z);
 847                                 exslot_mouse.node.set_position(pos);
 848                                 exslot_mouse.node.set_rotation(sel.ex->node->get_rotation());
 849                                 exslot_mouse.attach_exhibit(sel.ex, EXSLOT_ATTACH_TRANSIENT);
 850                                 if(exsel_active) {
 851                                         exsel_active = ExSelection::null;       // cancel active on grab
 852                                 }
 853                         }
 854                         press_x = x;
 855                         press_y = y;
 856
 857                 } else {
 858                         if(exsel_grab_mouse) {
 859                                 // cancel grab on mouse release
 860                                 Exhibit *ex = exsel_grab_mouse.ex;
 861                                 Vec3 pos = exslot_mouse.node.get_position();
 862
 863                                 debug_log("releasing at %g %g %g ...\n", pos.x, pos.y, pos.z);
 864
 865                                 exslot_mouse.detach_exhibit();
 866
 867                                 ExhibitSlot *slot = exman->nearest_empty_slot(pos, 300);
 868                                 if(!slot) {
 869                                         debug_log("no empty slot nearby\n");
 870                                         if(ex->prev_slot && ex->prev_slot->empty()) {
 871                                                 slot = ex->prev_slot;
 872                                                 debug_log("using previous slot\n");
 873                                         }
 874                                 }
 875
 876                                 if(slot) {
 877                                         slot->attach_exhibit(ex);
 878                                 } else {
 879                                         // nowhere to put it, so stash it for later
 880                                         exslot_mouse.detach_exhibit();
 881                                         exman->stash_exhibit(ex);
 882                                         debug_log("no slots available, stashing\n");
 883                                 }
 884
 885                                 exsel_grab_mouse = ExSelection::null;
 886                         }
 887
 888                         if(abs(press_x - x) < 5 && abs(press_y - y) < 5) {
 889                                 exsel_active = sel;     // select or deselect active exhibit
 890                                 if(sel) {
 891                                         debug_log("selecting...\n");
 892                                 } else {
 893                                         debug_log("deselecting...\n");
 894                                 }
 895                         }
 896
 897                         press_x = press_y = INT_MIN;
 898                 }
 899         }
 900 }
 901
 902 static inline void mouse_look(float dx, float dy)
 903 {
 904         float scrsz = (float)win_height;
 905         avatar.set_body_rotation(avatar.body_rot + dx * 512.0 / scrsz);
 906         avatar.head_alt += dy * 512.0 / scrsz;
 907
 908         if(avatar.head_alt < -90) avatar.head_alt = -90;
 909         if(avatar.head_alt > 90) avatar.head_alt = 90;
 910 }
 911
 912 static void mouse_zoom(float dx, float dy)
 913 {
 914         cam_dist += dy * 0.1;
 915         if(cam_dist < 0.0) cam_dist = 0.0;
 916 }
 917
 918 void app_mouse_motion(int x, int y)
 919 {
 920         if(debug_gui) {
 921                 debug_gui_mmotion(x, y);
 922                 return; // ignore mouse events while GUI is visible
 923         }
 924
 925         int dx = x - prev_mx;
 926         int dy = y - prev_my;
 927         prev_mx = x;
 928         prev_my = y;
 929
 930         if(!dx && !dy) return;
 931
 932         if(exsel_grab_mouse) {
 933                 Vec3 pos = exslot_mouse.node.get_node_position();
 934                 Vec3 dir = transpose(view_matrix.upper3x3()) * Vec3(dx * 1.0, dy * -1.0, 0);
 935
 936                 exslot_mouse.node.set_position(pos + dir);
 937         }
 938
 939         if(bnstate[2]) {
 940                 mouse_look(dx, dy);
 941         }
 942 }
 943
 944 void app_mouse_delta(int dx, int dy)
 945 {
 946         if(bnstate[2]) {
 947                 mouse_zoom(dx * mouse_speed, dy * mouse_speed);
 948         } else {
 949                 mouse_look(dx * mouse_speed, dy * mouse_speed);
 950         }
 951 }
 952
 953 void app_mouse_wheel(int dir)
 954 {
 955         if(debug_gui) {
 956                 debug_gui_wheel(dir);
 957         }
 958 }
 959
 960 void app_gamepad_axis(int axis, float val)
 961 {
 962         switch(axis) {
 963         case 0:
 964                 joy_move.x = val;
 965                 break;
 966         case 1:
 967                 joy_move.y = val;
 968                 break;
 969
 970         case 2:
 971                 joy_look.x = val;
 972                 break;
 973         case 3:
 974                 joy_look.y = val;
 975                 break;
 976         }
 977 }
 978
 979 void app_gamepad_button(int bn, bool pressed)
 980 {
 981         gpad_bnstate[bn] = pressed;
 982
 983         if(pressed) {
 984                 switch(bn) {
 985                 case GPAD_LSTICK:
 986                         toggle_flight();
 987                         break;
 988
 989                 case GPAD_X:
 990                         show_blobs = !show_blobs;
 991                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 992                         break;
 993
 994                 case GPAD_START:
 995                         goatvr_recenter();
 996                         show_message("VR recenter\n");
 997                         break;
 998
 999                 default:
1000                         break;
1001                 }
1002         }
1003 }
1004
1005 static void toggle_flight()
1006 {
1007         static float prev_walk_speed = -1.0;
1008         if(prev_walk_speed < 0.0) {
1009                 noclip = true;
1010                 prev_walk_speed = walk_speed;
1011                 walk_speed = 1000.0;
1012                 show_message("fly mode\n");
1013         } else {
1014                 noclip = false;
1015                 walk_speed = prev_walk_speed;
1016                 prev_walk_speed = -1.0;
1017                 show_message("walk mode\n");
1018         }
1019 }
1020
1021 static void calc_framerate()
1022 {
1023         //static int ncalc;
1024         static int nframes;
1025         static long prev_upd;
1026
1027         long elapsed = time_msec - prev_upd;
1028         if(elapsed >= 1000) {
1029                 framerate = (float)nframes / (float)(elapsed * 0.001);
1030                 nframes = 1;
1031                 prev_upd = time_msec;
1032
1033                 /*if(++ncalc >= 5) {
1034                         printf("fps: %f\n", framerate);
1035                         ncalc = 0;
1036                 }*/
1037         } else {
1038                 ++nframes;
1039         }
1040 }
1041
1042 static Ray calc_pick_ray(int x, int y)
1043 {
1044         float nx = (float)x / (float)win_width;
1045         float ny = (float)(win_height - y) / (float)win_height;
1046
1047         last_pick_ray = mouse_pick_ray(nx, ny, view_matrix, proj_matrix);
1048         return last_pick_ray;
1049 }