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
 184         if(!fb_srgb) {
 185                 sdr_post_gamma = create_program_load("sdr/post_gamma.v.glsl", "sdr/post_gamma.p.glsl");
 186         }
 187
 188         rend = new Renderer;
 189         if(!rend->init()) {
 190                 return false;
 191         }
 192         if(opt.reflect) {
 193                 rend->ropt |= RENDER_MIRRORS;
 194         } else {
 195                 rend->ropt &= ~RENDER_MIRRORS;
 196         }
 197         rend->set_scene(mscn);
 198
 199         glUseProgram(0);
 200
 201         if(opt.vr || opt.fullscreen) {
 202                 app_grab_mouse(true);
 203         }
 204
 205         if(mscn->music && opt.music) {
 206                 mscn->music->play(AUDIO_PLAYMODE_LOOP);
 207         }
 208         return true;
 209 }
 210
 211 // post_scene_init is called after the scene has completed loading
 212 static void post_scene_init()
 213 {
 214         mscn->update(0);        // update once to calculate node matrices
 215
 216         int num_mir = mscn->calc_mirror_planes();
 217         info_log("found %d mirror planes\n", num_mir);
 218
 219         exman->load(mscn, "data/exhibits");
 220 }
 221
 222 void app_cleanup()
 223 {
 224         if(mscn->music) {
 225                 mscn->music->stop();
 226         }
 227         destroy_audio();
 228
 229         app_grab_mouse(false);
 230         if(opt.vr) {
 231                 delete goatvr_rtarg;
 232                 goatvr_shutdown();
 233         }
 234         destroy_vrhands();
 235
 236         delete rend;
 237
 238         exui_shutdown();
 239
 240         /* this must be destroyed before the scene graph to detach exhibit nodes
 241          * before the scene tries to delete them recursively
 242          */
 243         delete exman;
 244
 245         texman.clear();
 246         sceneman.clear();
 247
 248         cleanup_debug_gui();
 249 }
 250
 251 static bool constrain_walk_mesh(const Vec3 &v, Vec3 *newv)
 252 {
 253         Mesh *wm = mscn->walk_mesh;
 254         if(!wm) {
 255                 *newv = v;
 256                 return true;
 257         }
 258
 259         Ray downray = Ray(v, Vec3(0, -1, 0));
 260         HitPoint hit;
 261         if(mscn->walk_mesh->intersect(downray, &hit)) {
 262                 *newv = hit.pos;
 263                 newv->y += user_eye_height;
 264                 return true;
 265         }
 266         return false;
 267 }
 268
 269 static void update(float dt)
 270 {
 271         texman.update();
 272         sceneman.update();
 273
 274         if(post_scene_init_pending && !sceneman.pending()) {
 275                 post_scene_init_pending = false;
 276                 post_scene_init();
 277         }
 278
 279         mscn->update(dt);
 280         exman->update(dt);
 281         exui_update(dt);
 282
 283         // use goatvr sticks for joystick input
 284         int num_vr_sticks = goatvr_num_sticks();
 285         if(num_vr_sticks > 0) {
 286                 float p[2];
 287                 goatvr_stick_pos(0, p);
 288                 joy_move.x = p[0];
 289                 joy_move.y = -p[1];
 290         }
 291         if(num_vr_sticks > 1) {
 292                 float p[2];
 293                 goatvr_stick_pos(1, p);
 294                 joy_look.x = p[0];
 295         }
 296
 297
 298         float speed = walk_speed * dt;
 299         Vec3 dir;
 300
 301         // joystick
 302         float jdeadsq = joy_deadzone * joy_deadzone;
 303         float jmove_lensq = length_sq(joy_move);
 304         float jlook_lensq = length_sq(joy_look);
 305
 306         if(jmove_lensq > jdeadsq) {
 307                 float len = sqrt(jmove_lensq);
 308                 jmove_lensq -= jdeadsq;
 309
 310                 float mag = len * len;
 311                 dir.x += mag * joy_move.x / len * 2.0 * speed;
 312                 dir.z += mag * joy_move.y / len * 2.0 * speed;
 313         }
 314         if(jlook_lensq > jdeadsq) {
 315                 float len = sqrt(jlook_lensq);
 316                 jlook_lensq -= jdeadsq;
 317
 318                 float mag = len * len;
 319                 avatar.body_rot += mag * joy_look.x / len * 200.0 * dt;
 320                 avatar.head_alt += mag * joy_look.y / len * 100.0 * dt;
 321                 if(avatar.head_alt < -90.0f) avatar.head_alt = -90.0f;
 322                 if(avatar.head_alt > 90.0f) avatar.head_alt = 90.0f;
 323         }
 324
 325         // keyboard move
 326         if(keystate[(int)'w']) {
 327                 dir.z -= speed;
 328         }
 329         if(keystate[(int)'s']) {
 330                 dir.z += speed;
 331         }
 332         if(keystate[(int)'d']) {
 333                 dir.x += speed;
 334         }
 335         if(keystate[(int)'a']) {
 336                 dir.x -= speed;
 337         }
 338         if(keystate[(int)'q'] || gpad_bnstate[GPAD_UP]) {
 339                 avatar.pos.y += speed;
 340         }
 341         if(keystate[(int)'z'] || gpad_bnstate[GPAD_DOWN]) {
 342                 avatar.pos.y -= speed;
 343         }
 344
 345         float theta = M_PI * avatar.body_rot / 180.0f;
 346         Vec3 newpos;
 347         newpos.x = avatar.pos.x + cos(theta) * dir.x - sin(theta) * dir.z;
 348         newpos.y = avatar.pos.y;
 349         newpos.z = avatar.pos.z + sin(theta) * dir.x + cos(theta) * dir.z;
 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]->rotation);
 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                                                 exslot[i]->rotation = sel.ex->node->get_rotation();
 415                                                 debug_log("Grabbing with rot: %f %f %f %f\n", exslot[i]->rotation.x,
 416                                                                 exslot[i]->rotation.y, exslot[i]->rotation.z, exslot[i]->rotation.w);
 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                                                         ex->node->set_rotation(exslot[i]->node.get_rotation());
 443                                                         slot->attach_exhibit(ex);
 444                                                 } else {
 445                                                         // nowhere to put it, stash it for later
 446                                                         exman->stash_exhibit(ex);
 447                                                         debug_log("no slots available, stashing\n");
 448                                                 }
 449
 450                                                 *exsel_grab[i] = ExSelection::null;
 451                                         }
 452                                 }
 453                         }
 454                 }
 455
 456                 // if there are no grabs, and we're pointing with the right finger, override active
 457                 if(!exsel_grab_left && !exsel_grab_right) {
 458                         if(goatvr_action(1, GOATVR_ACTION_POINT)) {
 459                                 Ray ray;
 460                                 ray.origin = vrhand[1].pos;
 461                                 ray.dir = rotate(Vec3(0, 0, -1), vrhand[1].rot);
 462                                 //exsel_active = exman->select(ray);
 463                                 pointing = true;
 464                         } else {
 465                                 exsel_active = ExSelection::null;
 466                                 pointing = false;
 467                         }
 468                 }
 469
 470         } else {
 471                 // check if an exhibit is hovered-over by mouse (only if we don't have one grabbed)
 472                 if(!exsel_grab_mouse) {
 473                         Ray ray = calc_pick_ray(prev_mx, prev_my);
 474                         exsel_hover = exman->select(ray);
 475                 }
 476
 477                 // TODO do this properly
 478                 // set the position of the left hand at a suitable position for the exhibit UI
 479                 dir = rotate(Vec3(-0.46, -0.1, -1), Vec3(0, 1, 0), deg_to_rad(-avatar.body_rot));
 480                 exslot_left.node.set_position(avatar.pos + dir * 30); // magic: distance in front
 481         }
 482
 483         if(!exslot_right.empty()) exslot_right.node.update(dt);
 484         // always update the left slot, because it's the anchor point of the exhibit ui
 485         exslot_left.node.update(dt);
 486 }
 487
 488 void app_display()
 489 {
 490         float dt = (float)(time_msec - prev_msec) / 1000.0f;
 491         prev_msec = time_msec;
 492
 493         if(debug_gui) {
 494                 ImGui::GetIOPtr()->DeltaTime = dt;
 495                 ImGui::NewFrame();
 496
 497                 //ImGui::ShowTestWindow();
 498         }
 499
 500         glClearColor(1, 1, 1, 1);
 501
 502         if(opt.vr) {
 503                 // VR mode
 504                 goatvr_draw_start();
 505                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 506
 507                 unsigned int gfbo = goatvr_get_fbo();
 508
 509                 update(dt);
 510
 511                 for(int i=0; i<2; i++) {
 512                         // for each eye
 513                         goatvr_draw_eye(i);
 514                         if(gfbo) {
 515                                 vp_width = goatvr_get_fb_eye_width(i);
 516                                 vp_height = goatvr_get_fb_eye_height(i);
 517
 518                                 // this is a lightweight operation
 519                                 goatvr_rtarg->create_wrap_fbo(gfbo, vp_width, vp_height);
 520                                 push_render_target(goatvr_rtarg, RT_FAKE);
 521                         } else {
 522                                 vp_width = win_width / 2;
 523                         }
 524
 525                         proj_matrix = goatvr_projection_matrix(i, NEAR_CLIP, FAR_CLIP);
 526                         glMatrixMode(GL_PROJECTION);
 527                         glLoadMatrixf(proj_matrix[0]);
 528
 529                         view_matrix = mouse_view_matrix * Mat4(goatvr_view_matrix(i));
 530                         glMatrixMode(GL_MODELVIEW);
 531                         glLoadMatrixf(view_matrix[0]);
 532
 533                         draw_scene();
 534                         if(have_handtracking) {
 535                                 draw_vrhands();
 536                         }
 537
 538                         if(debug_gui) {
 539                                 ImGui::Render();
 540                         }
 541
 542                         if(gfbo) {
 543                                 pop_render_target(RT_FAKE);
 544                         }
 545                 }
 546
 547                 goatvr_draw_done();
 548
 549                 vp_width = win_width;
 550                 vp_height = win_height;
 551
 552                 if(should_swap) {
 553                         app_swap_buffers();
 554                 }
 555
 556         } else {
 557                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 558
 559                 update(dt);
 560
 561                 proj_matrix.perspective(deg_to_rad(50.0), win_aspect, NEAR_CLIP, FAR_CLIP);
 562                 glMatrixMode(GL_PROJECTION);
 563                 glLoadMatrixf(proj_matrix[0]);
 564
 565                 view_matrix = mouse_view_matrix;
 566                 glMatrixMode(GL_MODELVIEW);
 567                 glLoadMatrixf(view_matrix[0]);
 568
 569                 draw_scene();
 570
 571                 if(!fb_srgb && sdr_post_gamma) {
 572                         slow_post(sdr_post_gamma);
 573                         glUseProgram(0);
 574                 }
 575
 576                 if(debug_gui) {
 577                         ImGui::Render();
 578                 }
 579                 app_swap_buffers();
 580         }
 581         assert(glGetError() == GL_NO_ERROR);
 582
 583         calc_framerate();
 584 }
 585
 586
 587 static void draw_scene()
 588 {
 589         rend->draw();
 590         exman->draw();
 591
 592         if(have_handtracking) {
 593                 glUseProgram(0);
 594                 glPushAttrib(GL_ENABLE_BIT);
 595                 glDisable(GL_LIGHTING);
 596                 glBegin(GL_LINES);
 597                 for(int i=0; i<2; i++) {
 598                         if(vrhand[i].valid) {
 599                                 glColor3f(i, 1 - i, i);
 600                         } else {
 601                                 glColor3f(0.5, 0.5, 0.5);
 602                         }
 603                         Vec3 v = vrhand[i].pos;
 604                         Vec3 dir = rotate(Vec3(0, 0, -1), vrhand[i].rot) * 20.0f;
 605                         Vec3 up = rotate(Vec3(0, 1, 0), vrhand[i].rot) * 10.0f;
 606                         Vec3 right = rotate(Vec3(1, 0, 0), vrhand[i].rot) * 10.0f;
 607
 608                         if(i == 1 && pointing) {
 609                                 dir *= 1000.0f;
 610                         }
 611
 612                         glVertex3f(v.x, v.y, v.z);
 613                         glVertex3f(v.x + dir.x, v.y + dir.y, v.z + dir.z);
 614                         glVertex3f(v.x - right.x, v.y - right.y, v.z - right.z);
 615                         glVertex3f(v.x + right.x, v.y + right.y, v.z + right.z);
 616                         glVertex3f(v.x - up.x, v.y - up.y, v.z - up.z);
 617                         glVertex3f(v.x + up.x, v.y + up.y, v.z + up.z);
 618                 }
 619                 glEnd();
 620                 glPopAttrib();
 621         }
 622
 623         if(debug_gui && dbg_sel_node) {
 624                 AABox bvol = dbg_sel_node->get_bounds();
 625                 draw_geom_object(&bvol);
 626         }
 627
 628         if(show_walk_mesh && mscn->walk_mesh) {
 629                 glPushAttrib(GL_ENABLE_BIT);
 630                 glEnable(GL_BLEND);
 631                 glBlendFunc(GL_ONE, GL_ONE);
 632                 glEnable(GL_POLYGON_OFFSET_FILL);
 633
 634                 glUseProgram(0);
 635
 636                 glPolygonOffset(-1, 1);
 637                 glDepthMask(0);
 638
 639                 glColor3f(0.3, 0.08, 0.01);
 640                 mscn->walk_mesh->draw();
 641
 642                 glDepthMask(1);
 643
 644                 glPopAttrib();
 645         }
 646
 647         exui_draw();
 648
 649         print_text(Vec2(9 * win_width / 10, 20), Vec3(1, 1, 0), "fps: %.1f", framerate);
 650         draw_ui();
 651 }
 652
 653
 654 void app_reshape(int x, int y)
 655 {
 656         glViewport(0, 0, x, y);
 657         goatvr_set_fb_size(x, y, 1.0f);
 658         debug_gui_reshape(x, y);
 659
 660         vp_width = x;
 661         vp_height = y;
 662 }
 663
 664 void app_keyboard(int key, bool pressed)
 665 {
 666         unsigned int mod = app_get_modifiers();
 667
 668         if(debug_gui && !(pressed && (key == '`' || key == 27))) {
 669                 debug_gui_key(key, pressed, mod);
 670                 return; // ignore all keystrokes when GUI is visible
 671         }
 672
 673         if(pressed) {
 674                 switch(key) {
 675                 case 27:
 676                         app_quit();
 677                         break;
 678
 679                 case '\n':
 680                 case '\r':
 681                         if(mod & MOD_ALT) {
 682                                 app_toggle_fullscreen();
 683                         }
 684                         break;
 685
 686                 case '`':
 687                         debug_gui = !debug_gui;
 688                         show_message("debug gui %s", debug_gui ? "enabled" : "disabled");
 689                         break;
 690
 691                 case 'm':
 692                         app_toggle_grab_mouse();
 693                         show_message("mouse %s", app_is_mouse_grabbed() ? "grabbed" : "released");
 694                         break;
 695
 696                 case 'w':
 697                         if(mod & MOD_CTRL) {
 698                                 show_walk_mesh = !show_walk_mesh;
 699                                 show_message("walk mesh: %s", show_walk_mesh ? "on" : "off");
 700                         }
 701                         break;
 702
 703                 case 'c':
 704                         if(mod & MOD_CTRL) {
 705                                 noclip = !noclip;
 706                                 show_message(noclip ? "no clip" : "clip");
 707                         }
 708                         break;
 709
 710                 case 'f':
 711                         toggle_flight();
 712                         break;
 713
 714                 case 'p':
 715                         if(mod & MOD_CTRL) {
 716                                 fb_srgb = !fb_srgb;
 717                                 show_message("gamma correction for non-sRGB framebuffers: %s\n", fb_srgb ? "off" : "on");
 718                         }
 719                         break;
 720
 721                 case '=':
 722                         walk_speed *= 1.25;
 723                         show_message("walk speed: %g", walk_speed);
 724                         break;
 725
 726                 case '-':
 727                         walk_speed *= 0.75;
 728                         show_message("walk speed: %g", walk_speed);
 729                         break;
 730
 731                 case ']':
 732                         mouse_speed *= 1.2;
 733                         show_message("mouse speed: %g", mouse_speed);
 734                         break;
 735
 736                 case '[':
 737                         mouse_speed *= 0.8;
 738                         show_message("mouse speed: %g", mouse_speed);
 739                         break;
 740
 741                 case 'b':
 742                         show_blobs = !show_blobs;
 743                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 744                         break;
 745
 746                 case ' ':
 747                         goatvr_recenter();
 748                         show_message("VR recenter\n");
 749                         break;
 750
 751                 case KEY_UP:
 752                         exui_scroll(-1);
 753                         break;
 754
 755                 case KEY_DOWN:
 756                         exui_scroll(1);
 757                         break;
 758
 759                 case KEY_LEFT:
 760                         exui_change_tab(-1);
 761                         break;
 762
 763                 case KEY_RIGHT:
 764                         exui_change_tab(1);
 765                         break;
 766
 767                 case KEY_F5:
 768                 case KEY_F6:
 769                 case KEY_F7:
 770                 case KEY_F8:
 771                         dbg_key_pending |= 1 << (key - KEY_F5);
 772                         break;
 773                 }
 774         }
 775
 776         if(key < 256 && !(mod & (MOD_CTRL | MOD_ALT))) {
 777                 keystate[key] = pressed;
 778         }
 779 }
 780
 781 void app_mouse_button(int bn, bool pressed, int x, int y)
 782 {
 783         static int press_x, press_y;
 784
 785         if(debug_gui) {
 786                 debug_gui_mbutton(bn, pressed, x, y);
 787                 return; // ignore mouse events while GUI is visible
 788         }
 789
 790         prev_mx = x;
 791         prev_my = y;
 792         bnstate[bn] = pressed;
 793
 794         if(bn == 0) {
 795                 ExSelection sel;
 796                 Ray ray = calc_pick_ray(x, y);
 797                 sel = exman->select(ray);
 798
 799                 if(pressed) {
 800                         if(sel && (app_get_modifiers() & MOD_CTRL)) {
 801                                 exsel_grab_mouse = sel;
 802                                 Vec3 pos = sel.ex->node->get_position();
 803                                 debug_log("grabbing... (%g %g %g)\n", pos.x, pos.y, pos.z);
 804                                 exslot_mouse.node.set_position(pos);
 805                                 exslot_mouse.node.set_rotation(sel.ex->node->get_rotation());
 806                                 exslot_mouse.attach_exhibit(sel.ex, EXSLOT_ATTACH_TRANSIENT);
 807                                 if(exsel_active) {
 808                                         exsel_active = ExSelection::null;       // cancel active on grab
 809                                 }
 810                         }
 811                         press_x = x;
 812                         press_y = y;
 813
 814                 } else {
 815                         if(exsel_grab_mouse) {
 816                                 // cancel grab on mouse release
 817                                 Exhibit *ex = exsel_grab_mouse.ex;
 818                                 Vec3 pos = exslot_mouse.node.get_position();
 819
 820                                 debug_log("releasing at %g %g %g ...\n", pos.x, pos.y, pos.z);
 821
 822                                 exslot_mouse.detach_exhibit();
 823
 824                                 ExhibitSlot *slot = exman->nearest_empty_slot(pos, 100);
 825                                 if(!slot) {
 826                                         debug_log("no empty slot nearby\n");
 827                                         if(ex->prev_slot && ex->prev_slot->empty()) {
 828                                                 slot = ex->prev_slot;
 829                                                 debug_log("using previous slot\n");
 830                                         }
 831                                 }
 832
 833                                 if(slot) {
 834                                         slot->attach_exhibit(ex);
 835                                 } else {
 836                                         // nowhere to put it, so stash it for later
 837                                         exslot_mouse.detach_exhibit();
 838                                         exman->stash_exhibit(ex);
 839                                         debug_log("no slots available, stashing\n");
 840                                 }
 841
 842                                 exsel_grab_mouse = ExSelection::null;
 843                         }
 844
 845                         if(abs(press_x - x) < 5 && abs(press_y - y) < 5) {
 846                                 exsel_active = sel;     // select or deselect active exhibit
 847                                 if(sel) {
 848                                         debug_log("selecting...\n");
 849                                 } else {
 850                                         debug_log("deselecting...\n");
 851                                 }
 852                         }
 853
 854                         press_x = press_y = INT_MIN;
 855                 }
 856         }
 857 }
 858
 859 static inline void mouse_look(float dx, float dy)
 860 {
 861         float scrsz = (float)win_height;
 862         avatar.body_rot += dx * 512.0 / scrsz;
 863         avatar.head_alt += dy * 512.0 / scrsz;
 864
 865         if(avatar.head_alt < -90) avatar.head_alt = -90;
 866         if(avatar.head_alt > 90) avatar.head_alt = 90;
 867 }
 868
 869 static void mouse_zoom(float dx, float dy)
 870 {
 871         cam_dist += dy * 0.1;
 872         if(cam_dist < 0.0) cam_dist = 0.0;
 873 }
 874
 875 void app_mouse_motion(int x, int y)
 876 {
 877         if(debug_gui) {
 878                 debug_gui_mmotion(x, y);
 879                 return; // ignore mouse events while GUI is visible
 880         }
 881
 882         int dx = x - prev_mx;
 883         int dy = y - prev_my;
 884         prev_mx = x;
 885         prev_my = y;
 886
 887         if(!dx && !dy) return;
 888
 889         if(exsel_grab_mouse) {
 890                 Vec3 pos = exslot_mouse.node.get_node_position();
 891                 Vec3 dir = transpose(view_matrix.upper3x3()) * Vec3(dx * 1.0, dy * -1.0, 0);
 892
 893                 exslot_mouse.node.set_position(pos + dir);
 894         }
 895
 896         if(bnstate[2]) {
 897                 mouse_look(dx, dy);
 898         }
 899 }
 900
 901 void app_mouse_delta(int dx, int dy)
 902 {
 903         if(bnstate[2]) {
 904                 mouse_zoom(dx * mouse_speed, dy * mouse_speed);
 905         } else {
 906                 mouse_look(dx * mouse_speed, dy * mouse_speed);
 907         }
 908 }
 909
 910 void app_mouse_wheel(int dir)
 911 {
 912         if(debug_gui) {
 913                 debug_gui_wheel(dir);
 914         }
 915 }
 916
 917 void app_gamepad_axis(int axis, float val)
 918 {
 919         switch(axis) {
 920         case 0:
 921                 joy_move.x = val;
 922                 break;
 923         case 1:
 924                 joy_move.y = val;
 925                 break;
 926
 927         case 2:
 928                 joy_look.x = val;
 929                 break;
 930         case 3:
 931                 joy_look.y = val;
 932                 break;
 933         }
 934 }
 935
 936 void app_gamepad_button(int bn, bool pressed)
 937 {
 938         gpad_bnstate[bn] = pressed;
 939
 940         if(pressed) {
 941                 switch(bn) {
 942                 case GPAD_LSTICK:
 943                         toggle_flight();
 944                         break;
 945
 946                 case GPAD_X:
 947                         show_blobs = !show_blobs;
 948                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 949                         break;
 950
 951                 case GPAD_START:
 952                         goatvr_recenter();
 953                         show_message("VR recenter\n");
 954                         break;
 955
 956                 default:
 957                         break;
 958                 }
 959         }
 960 }
 961
 962 static void toggle_flight()
 963 {
 964         static float prev_walk_speed = -1.0;
 965         if(prev_walk_speed < 0.0) {
 966                 noclip = true;
 967                 prev_walk_speed = walk_speed;
 968                 walk_speed = 1000.0;
 969                 show_message("fly mode\n");
 970         } else {
 971                 noclip = false;
 972                 walk_speed = prev_walk_speed;
 973                 prev_walk_speed = -1.0;
 974                 show_message("walk mode\n");
 975         }
 976 }
 977
 978 static void calc_framerate()
 979 {
 980         //static int ncalc;
 981         static int nframes;
 982         static long prev_upd;
 983
 984         long elapsed = time_msec - prev_upd;
 985         if(elapsed >= 1000) {
 986                 framerate = (float)nframes / (float)(elapsed * 0.001);
 987                 nframes = 1;
 988                 prev_upd = time_msec;
 989
 990                 /*if(++ncalc >= 5) {
 991                         printf("fps: %f\n", framerate);
 992                         ncalc = 0;
 993                 }*/
 994         } else {
 995                 ++nframes;
 996         }
 997 }
 998
 999 static Ray calc_pick_ray(int x, int y)
1000 {
1001         float nx = (float)x / (float)win_width;
1002         float ny = (float)(win_height - y) / (float)win_height;
1003
1004         last_pick_ray = mouse_pick_ray(nx, ny, view_matrix, proj_matrix);
1005         return last_pick_ray;
1006 }