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 "avatar.h"
  19 #include "vrinput.h"
  20 #include "exman.h"
  21 #include "blob_exhibit.h"
  22 #include "dbg_gui.h"
  23 #include "geomdraw.h"
  24 #include "ui_exhibit.h"
  25
  26 #define NEAR_CLIP       5.0
  27 #define FAR_CLIP        10000.0
  28
  29 static void draw_scene();
  30 static void toggle_flight();
  31 static void calc_framerate();
  32 static Ray calc_pick_ray(int x, int y);
  33
  34 long time_msec;
  35 int win_width, win_height;
  36 float win_aspect;
  37 bool fb_srgb;
  38 bool opt_gear_wireframe;
  39
  40 TextureSet texman;
  41 SceneSet sceneman;
  42
  43 unsigned int sdr_ltmap, sdr_ltmap_notex;
  44
  45 int fpexcept_enabled;
  46
  47 static Avatar avatar;
  48
  49 static float cam_dist = 0.0;
  50 static float floor_y;   // last floor height
  51 static float user_eye_height = 165;
  52
  53 static float walk_speed = 300.0f;
  54 static float mouse_speed = 0.5f;
  55 static bool show_walk_mesh, noclip = false;
  56
  57 static bool have_headtracking, have_handtracking, should_swap;
  58
  59 static int prev_mx, prev_my;
  60 static bool bnstate[8];
  61 static bool keystate[256];
  62 static bool gpad_bnstate[64];
  63 static Vec2 joy_move, joy_look;
  64 static float joy_deadzone = 0.01;
  65
  66 static float framerate;
  67
  68 static Mat4 view_matrix, mouse_view_matrix, proj_matrix;
  69 static MetaScene *mscn;
  70 static unsigned int sdr_post_gamma;
  71
  72 static long prev_msec;
  73
  74 static ExhibitManager *exman;
  75 static bool show_blobs;
  76
  77 ExSelection exsel_active, exsel_hover;
  78 ExSelection exsel_grab_left, exsel_grab_right;
  79 #define exsel_grab_mouse exsel_grab_right
  80 static ExhibitSlot exslot_left, exslot_right;
  81 #define exslot_mouse exslot_right
  82
  83 static Renderer *rend;
  84
  85 static Ray last_pick_ray;
  86
  87
  88 bool app_init(int argc, char **argv)
  89 {
  90         set_log_file("demo.log");
  91
  92         char *env = getenv("FPEXCEPT");
  93         if(env && atoi(env)) {
  94                 info_log("enabling floating point exceptions\n");
  95                 fpexcept_enabled = 1;
  96                 enable_fpexcept();
  97         }
  98
  99         if(init_opengl() == -1) {
 100                 return false;
 101         }
 102
 103         if(!init_options(argc, argv, "demo.conf")) {
 104                 return false;
 105         }
 106         app_resize(opt.width, opt.height);
 107         app_fullscreen(opt.fullscreen);
 108
 109         if(opt.vr) {
 110                 if(goatvr_init() == -1) {
 111                         return false;
 112                 }
 113                 goatvr_set_origin_mode(GOATVR_HEAD);
 114                 goatvr_set_units_scale(100.0f);
 115
 116                 goatvr_startvr();
 117                 should_swap = goatvr_should_swap() != 0;
 118                 user_eye_height = goatvr_get_eye_height();
 119                 have_headtracking = goatvr_have_headtracking();
 120                 have_handtracking = goatvr_have_handtracking();
 121
 122                 goatvr_recenter();
 123         }
 124
 125         if(fb_srgb) {
 126                 int srgb_capable;
 127                 glGetIntegerv(GL_FRAMEBUFFER_SRGB_CAPABLE_EXT, &srgb_capable);
 128                 printf("Framebuffer %s sRGB-capable\n", srgb_capable ? "is" : "is not");
 129                 if(srgb_capable) {
 130                         glEnable(GL_FRAMEBUFFER_SRGB);
 131                 } else {
 132                         fb_srgb = 0;
 133                 }
 134         }
 135
 136         glEnable(GL_MULTISAMPLE);
 137         glEnable(GL_DEPTH_TEST);
 138         glEnable(GL_CULL_FACE);
 139         glEnable(GL_NORMALIZE);
 140
 141         if(!init_debug_gui()) {
 142                 return false;
 143         }
 144
 145         Mesh::use_custom_sdr_attr = false;
 146
 147         float ambient[] = {0.0, 0.0, 0.0, 0.0};
 148         glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);
 149
 150         glClearColor(1, 1, 1, 1);
 151
 152         init_audio();
 153
 154         if(!init_vrhands()) {
 155                 return false;
 156         }
 157
 158         mscn = new MetaScene;
 159         if(!mscn->load(opt.scenefile ? opt.scenefile : "data/museum.scene")) {
 160                 return false;
 161         }
 162
 163         avatar.pos = mscn->start_pos;
 164         Vec3 dir = rotate(Vec3(0, 0, 1), mscn->start_rot);
 165         dir.y = 0;
 166         avatar.body_rot = rad_to_deg(acos(dot(dir, Vec3(0, 0, 1))));
 167
 168         exman = new ExhibitManager;
 169         /*
 170         if(!exman->load(mscn, "data/exhibits")) {
 171                 //return false;
 172         }
 173         */
 174         if(!exui_init()) {
 175                 error_log("failed to initialize exhibit ui system\n");
 176                 return false;
 177         }
 178         exui_setnode(&exslot_left.node);
 179
 180         if(!(sdr_ltmap_notex = create_program_load("sdr/lightmap.v.glsl", "sdr/lightmap-notex.p.glsl"))) {
 181                 return false;
 182         }
 183         set_uniform_int(sdr_ltmap_notex, "texmap", MTL_TEX_DIFFUSE);
 184         set_uniform_int(sdr_ltmap_notex, "lightmap", MTL_TEX_LIGHTMAP);
 185
 186         if(!(sdr_ltmap = create_program_load("sdr/lightmap.v.glsl", "sdr/lightmap-tex.p.glsl"))) {
 187                 return false;
 188         }
 189         set_uniform_int(sdr_ltmap, "texmap", MTL_TEX_DIFFUSE);
 190         set_uniform_int(sdr_ltmap, "lightmap", MTL_TEX_LIGHTMAP);
 191
 192         if(!fb_srgb) {
 193                 sdr_post_gamma = create_program_load("sdr/post_gamma.v.glsl", "sdr/post_gamma.p.glsl");
 194         }
 195
 196         rend = new Renderer;
 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 void app_cleanup()
 212 {
 213         if(mscn->music) {
 214                 mscn->music->stop();
 215         }
 216         destroy_audio();
 217
 218         app_grab_mouse(false);
 219         if(opt.vr) {
 220                 goatvr_shutdown();
 221         }
 222         destroy_vrhands();
 223
 224         delete rend;
 225
 226         exui_shutdown();
 227
 228         /* this must be destroyed before the scene graph to detach exhibit nodes
 229          * before the scene tries to delete them recursively
 230          */
 231         delete exman;
 232
 233         texman.clear();
 234         sceneman.clear();
 235
 236         cleanup_debug_gui();
 237 }
 238
 239 static bool constrain_walk_mesh(const Vec3 &v, Vec3 *newv)
 240 {
 241         Mesh *wm = mscn->walk_mesh;
 242         if(!wm) {
 243                 *newv = v;
 244                 return true;
 245         }
 246
 247         Ray downray = Ray(v, Vec3(0, -1, 0));
 248         HitPoint hit;
 249         if(mscn->walk_mesh->intersect(downray, &hit)) {
 250                 *newv = hit.pos;
 251                 newv->y += user_eye_height;
 252                 return true;
 253         }
 254         return false;
 255 }
 256
 257 static void update(float dt)
 258 {
 259         texman.update();
 260         sceneman.update();
 261
 262         mscn->update(dt);
 263         exman->update(dt);
 264         exui_update(dt);
 265
 266         float speed = walk_speed * dt;
 267         Vec3 dir;
 268
 269         // joystick
 270         float jdeadsq = joy_deadzone * joy_deadzone;
 271         float jmove_lensq = length_sq(joy_move);
 272         float jlook_lensq = length_sq(joy_look);
 273
 274         if(jmove_lensq > jdeadsq) {
 275                 float len = sqrt(jmove_lensq);
 276                 jmove_lensq -= jdeadsq;
 277
 278                 float mag = len * len;
 279                 dir.x += mag * joy_move.x / len * 2.0 * speed;
 280                 dir.z += mag * joy_move.y / len * 2.0 * speed;
 281         }
 282         if(jlook_lensq > jdeadsq) {
 283                 float len = sqrt(jlook_lensq);
 284                 jlook_lensq -= jdeadsq;
 285
 286                 float mag = len * len;
 287                 avatar.body_rot += mag * joy_look.x / len * 200.0 * dt;
 288                 avatar.head_alt += mag * joy_look.y / len * 100.0 * dt;
 289                 if(avatar.head_alt < -90.0f) avatar.head_alt = -90.0f;
 290                 if(avatar.head_alt > 90.0f) avatar.head_alt = 90.0f;
 291         }
 292
 293         // keyboard move
 294         if(keystate[(int)'w']) {
 295                 dir.z -= speed;
 296         }
 297         if(keystate[(int)'s']) {
 298                 dir.z += speed;
 299         }
 300         if(keystate[(int)'d']) {
 301                 dir.x += speed;
 302         }
 303         if(keystate[(int)'a']) {
 304                 dir.x -= speed;
 305         }
 306         if(keystate[(int)'q'] || gpad_bnstate[GPAD_UP]) {
 307                 avatar.pos.y += speed;
 308         }
 309         if(keystate[(int)'z'] || gpad_bnstate[GPAD_DOWN]) {
 310                 avatar.pos.y -= speed;
 311         }
 312
 313         float theta = M_PI * avatar.body_rot / 180.0f;
 314         Vec3 newpos;
 315         newpos.x = avatar.pos.x + cos(theta) * dir.x - sin(theta) * dir.z;
 316         newpos.y = avatar.pos.y;
 317         newpos.z = avatar.pos.z + sin(theta) * dir.x + cos(theta) * dir.z;
 318
 319         if(noclip) {
 320                 avatar.pos = newpos;
 321         } else {
 322                 if(!constrain_walk_mesh(newpos, &avatar.pos)) {
 323                         float dtheta = M_PI / 32.0;
 324                         float theta = dtheta;
 325                         Vec2 dir2d = newpos.xz() - avatar.pos.xz();
 326
 327                         for(int i=0; i<16; i++) {
 328                                 Vec2 dvec = rotate(dir2d, theta);
 329                                 Vec3 pos = avatar.pos + Vec3(dvec.x, 0, dvec.y);
 330                                 if(constrain_walk_mesh(pos, &avatar.pos)) {
 331                                         break;
 332                                 }
 333                                 dvec = rotate(dir2d, -theta);
 334                                 pos = avatar.pos + Vec3(dvec.x, 0, dvec.y);
 335                                 if(constrain_walk_mesh(pos, &avatar.pos)) {
 336                                         break;
 337                                 }
 338                                 theta += dtheta;
 339                         }
 340                 }
 341                 floor_y = avatar.pos.y - user_eye_height;
 342         }
 343
 344         // TODO move to the avatar system
 345         // calculate mouselook view matrix
 346         mouse_view_matrix = Mat4::identity;
 347         mouse_view_matrix.pre_translate(0, 0, -cam_dist);
 348         if(!have_headtracking) {
 349                 mouse_view_matrix.pre_rotate_x(deg_to_rad(avatar.head_alt));
 350         }
 351         mouse_view_matrix.pre_rotate_y(deg_to_rad(avatar.body_rot));
 352         mouse_view_matrix.pre_translate(-avatar.pos.x, -avatar.pos.y, -avatar.pos.z);
 353
 354         // check if an exhibit is hovered-over by mouse or 6dof (only if we don't have one grabbed)
 355         if(!exsel_grab_mouse) {
 356                 // XXX note: using previous view/proj matrix lattency shouldn't be an issue but
 357                 //           make sure state-creep doesn't get us
 358                 // XXX also this mouse-picking probably should only be active in non-VR mode
 359                 Ray ray = calc_pick_ray(prev_mx, prev_my);
 360                 exsel_hover = exman->select(ray);
 361         }
 362
 363         // update hand-tracking
 364         if(have_handtracking) {
 365                 update_vrhands(&avatar);
 366         } else {
 367                 // set the position of the left hand at a suitable position for the exhibit UI
 368                 Vec3 dir = transpose(mouse_view_matrix.upper3x3()) * Vec3(0, 0, -1);
 369                 exslot_left.node.set_position(avatar.pos + dir * 30); // magic: distance in front
 370         }
 371
 372         if(!exslot_right.empty()) exslot_right.node.update(dt);
 373         // always update the left slot, because it's the anchor point of the exhibit ui
 374         exslot_left.node.update(dt);
 375 }
 376
 377 void app_display()
 378 {
 379         float dt = (float)(time_msec - prev_msec) / 1000.0f;
 380         prev_msec = time_msec;
 381
 382         if(debug_gui) {
 383                 ImGui::GetIOPtr()->DeltaTime = dt;
 384                 ImGui::NewFrame();
 385
 386                 ImGui::ShowTestWindow();
 387         }
 388
 389         if(opt.vr) {
 390                 // VR mode
 391                 goatvr_draw_start();
 392                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 393
 394                 update(dt);
 395
 396                 for(int i=0; i<2; i++) {
 397                         // for each eye
 398                         goatvr_draw_eye(i);
 399
 400                         proj_matrix = goatvr_projection_matrix(i, NEAR_CLIP, FAR_CLIP);
 401                         glMatrixMode(GL_PROJECTION);
 402                         glLoadMatrixf(proj_matrix[0]);
 403
 404                         view_matrix = mouse_view_matrix * Mat4(goatvr_view_matrix(i));
 405                         glMatrixMode(GL_MODELVIEW);
 406                         glLoadMatrixf(view_matrix[0]);
 407
 408                         draw_scene();
 409                         if(have_handtracking) {
 410                                 draw_vrhands();
 411                         }
 412
 413                         if(debug_gui) {
 414                                 ImGui::Render();
 415                         }
 416                 }
 417                 goatvr_draw_done();
 418
 419                 if(should_swap) {
 420                         app_swap_buffers();
 421                 }
 422
 423         } else {
 424                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 425
 426                 update(dt);
 427
 428                 proj_matrix.perspective(deg_to_rad(50.0), win_aspect, NEAR_CLIP, FAR_CLIP);
 429                 glMatrixMode(GL_PROJECTION);
 430                 glLoadMatrixf(proj_matrix[0]);
 431
 432                 view_matrix = mouse_view_matrix;
 433                 glMatrixMode(GL_MODELVIEW);
 434                 glLoadMatrixf(view_matrix[0]);
 435
 436                 draw_scene();
 437
 438                 if(!fb_srgb && sdr_post_gamma) {
 439                         slow_post(sdr_post_gamma);
 440                         glUseProgram(0);
 441                 }
 442
 443                 if(debug_gui) {
 444                         ImGui::Render();
 445                 }
 446                 app_swap_buffers();
 447         }
 448         assert(glGetError() == GL_NO_ERROR);
 449
 450         calc_framerate();
 451 }
 452
 453
 454 static void draw_scene()
 455 {
 456         rend->draw();
 457         exman->draw();
 458
 459         /*
 460         if(have_handtracking) {
 461                 Mat4 head_xform = inverse(mouse_view_matrix);//goatvr_head_matrix();
 462                 Mat4 head_dir_xform = head_xform.upper3x3();
 463
 464                 glUseProgram(0);
 465                 glPushAttrib(GL_ENABLE_BIT);
 466                 glDisable(GL_LIGHTING);
 467                 glBegin(GL_LINES);
 468                 for(int i=0; i<2; i++) {
 469                         if(hand[i].valid) {
 470                                 glColor3f(i, 1 - i, i);
 471                         } else {
 472                                 glColor3f(0.5, 0.5, 0.5);
 473                         }
 474                         Vec3 v = head_xform * hand[i].pos;
 475                         Vec3 dir = head_dir_xform * rotate(Vec3(0, 0, -1), hand[i].rot) * 20.0f;
 476                         Vec3 up = head_dir_xform * rotate(Vec3(0, 1, 0), hand[i].rot) * 10.0f;
 477                         Vec3 right = head_dir_xform * rotate(Vec3(1, 0, 0), hand[i].rot) * 10.0f;
 478
 479                         glVertex3f(v.x, v.y, v.z);
 480                         glVertex3f(v.x + dir.x, v.y + dir.y, v.z + dir.z);
 481                         glVertex3f(v.x - right.x, v.y - right.y, v.z - right.z);
 482                         glVertex3f(v.x + right.x, v.y + right.y, v.z + right.z);
 483                         glVertex3f(v.x - up.x, v.y - up.y, v.z - up.z);
 484                         glVertex3f(v.x + up.x, v.y + up.y, v.z + up.z);
 485                 }
 486                 glEnd();
 487                 glPopAttrib();
 488         }
 489         */
 490
 491         if(debug_gui && dbg_sel_node) {
 492                 AABox bvol = dbg_sel_node->get_bounds();
 493                 draw_geom_object(&bvol);
 494         }
 495
 496         if(show_walk_mesh && mscn->walk_mesh) {
 497                 glPushAttrib(GL_ENABLE_BIT);
 498                 glEnable(GL_BLEND);
 499                 glBlendFunc(GL_ONE, GL_ONE);
 500                 glEnable(GL_POLYGON_OFFSET_FILL);
 501
 502                 glUseProgram(0);
 503
 504                 glPolygonOffset(-1, 1);
 505                 glDepthMask(0);
 506
 507                 glColor3f(0.3, 0.08, 0.01);
 508                 mscn->walk_mesh->draw();
 509
 510                 glDepthMask(1);
 511
 512                 glPopAttrib();
 513         }
 514
 515         exui_draw();
 516
 517         print_text(Vec2(9 * win_width / 10, 20), Vec3(1, 1, 0), "fps: %.1f", framerate);
 518         draw_ui();
 519 }
 520
 521
 522 void app_reshape(int x, int y)
 523 {
 524         glViewport(0, 0, x, y);
 525         goatvr_set_fb_size(x, y, 1.0f);
 526         debug_gui_reshape(x, y);
 527 }
 528
 529 void app_keyboard(int key, bool pressed)
 530 {
 531         unsigned int mod = app_get_modifiers();
 532
 533         if(debug_gui && !(pressed && (key == '`' || key == 27))) {
 534                 debug_gui_key(key, pressed, mod);
 535                 return; // ignore all keystrokes when GUI is visible
 536         }
 537
 538         if(pressed) {
 539                 switch(key) {
 540                 case 27:
 541                         app_quit();
 542                         break;
 543
 544                 case '\n':
 545                 case '\r':
 546                         if(mod & MOD_ALT) {
 547                                 app_toggle_fullscreen();
 548                         }
 549                         break;
 550
 551                 case '`':
 552                         debug_gui = !debug_gui;
 553                         show_message("debug gui %s", debug_gui ? "enabled" : "disabled");
 554                         break;
 555
 556                 case 'm':
 557                         app_toggle_grab_mouse();
 558                         show_message("mouse %s", app_is_mouse_grabbed() ? "grabbed" : "released");
 559                         break;
 560
 561                 case 'w':
 562                         if(mod & MOD_CTRL) {
 563                                 show_walk_mesh = !show_walk_mesh;
 564                                 show_message("walk mesh: %s", show_walk_mesh ? "on" : "off");
 565                         }
 566                         break;
 567
 568                 case 'c':
 569                         if(mod & MOD_CTRL) {
 570                                 noclip = !noclip;
 571                                 show_message(noclip ? "no clip" : "clip");
 572                         }
 573                         break;
 574
 575                 case 'f':
 576                         toggle_flight();
 577                         break;
 578
 579                 case 'p':
 580                         if(mod & MOD_CTRL) {
 581                                 fb_srgb = !fb_srgb;
 582                                 show_message("gamma correction for non-sRGB framebuffers: %s\n", fb_srgb ? "off" : "on");
 583                         }
 584                         break;
 585
 586                 case '=':
 587                         walk_speed *= 1.25;
 588                         show_message("walk speed: %g", walk_speed);
 589                         break;
 590
 591                 case '-':
 592                         walk_speed *= 0.75;
 593                         show_message("walk speed: %g", walk_speed);
 594                         break;
 595
 596                 case ']':
 597                         mouse_speed *= 1.2;
 598                         show_message("mouse speed: %g", mouse_speed);
 599                         break;
 600
 601                 case '[':
 602                         mouse_speed *= 0.8;
 603                         show_message("mouse speed: %g", mouse_speed);
 604                         break;
 605
 606                 case 'b':
 607                         show_blobs = !show_blobs;
 608                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 609                         break;
 610
 611                 case ' ':
 612                         goatvr_recenter();
 613                         show_message("VR recenter\n");
 614                         break;
 615
 616                 case 'x':
 617                         exman->load(mscn, "data/exhibits");
 618                         break;
 619                 }
 620         }
 621
 622         if(key < 256 && !(mod & (MOD_CTRL | MOD_ALT))) {
 623                 keystate[key] = pressed;
 624         }
 625 }
 626
 627 void app_mouse_button(int bn, bool pressed, int x, int y)
 628 {
 629         static int press_x, press_y;
 630
 631         if(debug_gui) {
 632                 debug_gui_mbutton(bn, pressed, x, y);
 633                 return; // ignore mouse events while GUI is visible
 634         }
 635
 636         prev_mx = x;
 637         prev_my = y;
 638         bnstate[bn] = pressed;
 639
 640         if(bn == 0) {
 641                 ExSelection sel;
 642                 Ray ray = calc_pick_ray(x, y);
 643                 sel = exman->select(ray);
 644
 645                 if(pressed) {
 646                         if(sel && (app_get_modifiers() & MOD_CTRL)) {
 647                                 exsel_grab_mouse = sel;
 648                                 Vec3 pos = sel.ex->node->get_position();
 649                                 debug_log("grabbing... (%g %g %g)\n", pos.x, pos.y, pos.z);
 650                                 exslot_mouse.node.set_position(pos);
 651                                 exslot_mouse.node.set_rotation(sel.ex->node->get_rotation());
 652                                 exslot_mouse.attach_exhibit(sel.ex, EXSLOT_ATTACH_TRANSIENT);
 653                                 if(exsel_active) {
 654                                         exsel_active = ExSelection::null;       // cancel active on grab
 655                                 }
 656                         }
 657                         press_x = x;
 658                         press_y = y;
 659
 660                 } else {
 661                         if(exsel_grab_mouse) {
 662                                 // cancel grab on mouse release
 663                                 Exhibit *ex = exsel_grab_mouse.ex;
 664                                 Vec3 pos = exslot_mouse.node.get_position();
 665
 666                                 debug_log("releasing at %g %g %g ...\n", pos.x, pos.y, pos.z);
 667
 668                                 exslot_mouse.detach_exhibit();
 669
 670                                 ExhibitSlot *slot = exman->nearest_empty_slot(pos, 100);
 671                                 if(!slot) {
 672                                         debug_log("no empty slot nearby\n");
 673                                         if(ex->prev_slot && ex->prev_slot->empty()) {
 674                                                 slot = ex->prev_slot;
 675                                                 debug_log("using previous slot");
 676                                         }
 677                                 }
 678
 679                                 if(slot) {
 680                                         slot->attach_exhibit(ex);
 681                                 } else {
 682                                         // nowhere to put it, so stash it for later
 683                                         exslot_mouse.detach_exhibit();
 684                                         exman->stash_exhibit(ex);
 685                                         debug_log("no slots available, stashing\n");
 686                                 }
 687
 688                                 exsel_grab_mouse = ExSelection::null;
 689                         }
 690
 691                         if(abs(press_x - x) < 5 && abs(press_y - y) < 5) {
 692                                 exsel_active = sel;     // select or deselect active exhibit
 693                                 if(sel) {
 694                                         debug_log("selecting...\n");
 695                                 } else {
 696                                         debug_log("deselecting...\n");
 697                                 }
 698                         }
 699
 700                         press_x = press_y = INT_MIN;
 701                 }
 702         }
 703 }
 704
 705 static inline void mouse_look(float dx, float dy)
 706 {
 707         float scrsz = (float)win_height;
 708         avatar.body_rot += dx * 512.0 / scrsz;
 709         avatar.head_alt += dy * 512.0 / scrsz;
 710
 711         if(avatar.head_alt < -90) avatar.head_alt = -90;
 712         if(avatar.head_alt > 90) avatar.head_alt = 90;
 713 }
 714
 715 static void mouse_zoom(float dx, float dy)
 716 {
 717         cam_dist += dy * 0.1;
 718         if(cam_dist < 0.0) cam_dist = 0.0;
 719 }
 720
 721 void app_mouse_motion(int x, int y)
 722 {
 723         if(debug_gui) {
 724                 debug_gui_mmotion(x, y);
 725                 return; // ignore mouse events while GUI is visible
 726         }
 727
 728         int dx = x - prev_mx;
 729         int dy = y - prev_my;
 730         prev_mx = x;
 731         prev_my = y;
 732
 733         if(!dx && !dy) return;
 734
 735         if(exsel_grab_mouse) {
 736                 Vec3 pos = exslot_mouse.node.get_node_position();
 737                 Vec3 dir = transpose(view_matrix.upper3x3()) * Vec3(dx * 1.0, dy * -1.0, 0);
 738
 739                 exslot_mouse.node.set_position(pos + dir);
 740         }
 741
 742         if(bnstate[2]) {
 743                 mouse_look(dx, dy);
 744         }
 745 }
 746
 747 void app_mouse_delta(int dx, int dy)
 748 {
 749         if(bnstate[2]) {
 750                 mouse_zoom(dx * mouse_speed, dy * mouse_speed);
 751         } else {
 752                 mouse_look(dx * mouse_speed, dy * mouse_speed);
 753         }
 754 }
 755
 756 void app_mouse_wheel(int dir)
 757 {
 758         if(debug_gui) {
 759                 debug_gui_wheel(dir);
 760         }
 761 }
 762
 763 void app_gamepad_axis(int axis, float val)
 764 {
 765         switch(axis) {
 766         case 0:
 767                 joy_move.x = val;
 768                 break;
 769         case 1:
 770                 joy_move.y = val;
 771                 break;
 772
 773         case 2:
 774                 joy_look.x = val;
 775                 break;
 776         case 3:
 777                 joy_look.y = val;
 778                 break;
 779         }
 780 }
 781
 782 void app_gamepad_button(int bn, bool pressed)
 783 {
 784         gpad_bnstate[bn] = pressed;
 785
 786         if(pressed) {
 787                 switch(bn) {
 788                 case GPAD_LSTICK:
 789                         toggle_flight();
 790                         break;
 791
 792                 case GPAD_X:
 793                         show_blobs = !show_blobs;
 794                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 795                         break;
 796
 797                 case GPAD_START:
 798                         goatvr_recenter();
 799                         show_message("VR recenter\n");
 800                         break;
 801
 802                 default:
 803                         break;
 804                 }
 805         }
 806 }
 807
 808 static void toggle_flight()
 809 {
 810         static float prev_walk_speed = -1.0;
 811         if(prev_walk_speed < 0.0) {
 812                 noclip = true;
 813                 prev_walk_speed = walk_speed;
 814                 walk_speed = 1000.0;
 815                 show_message("fly mode\n");
 816         } else {
 817                 noclip = false;
 818                 walk_speed = prev_walk_speed;
 819                 prev_walk_speed = -1.0;
 820                 show_message("walk mode\n");
 821         }
 822 }
 823
 824 static void calc_framerate()
 825 {
 826         //static int ncalc;
 827         static int nframes;
 828         static long prev_upd;
 829
 830         long elapsed = time_msec - prev_upd;
 831         if(elapsed >= 1000) {
 832                 framerate = (float)nframes / (float)(elapsed * 0.001);
 833                 nframes = 1;
 834                 prev_upd = time_msec;
 835
 836                 /*if(++ncalc >= 5) {
 837                         printf("fps: %f\n", framerate);
 838                         ncalc = 0;
 839                 }*/
 840         } else {
 841                 ++nframes;
 842         }
 843 }
 844
 845 static Ray calc_pick_ray(int x, int y)
 846 {
 847         float nx = (float)x / (float)win_width;
 848         float ny = (float)(win_height - y) / (float)win_height;
 849
 850         last_pick_ray = mouse_pick_ray(nx, ny, view_matrix, proj_matrix);
 851         return last_pick_ray;
 852 }