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 int vp_width, vp_height;
  37 float win_aspect;
  38 bool fb_srgb;
  39 bool opt_gear_wireframe;
  40
  41 TextureSet texman;
  42 SceneSet sceneman;
  43
  44 int fpexcept_enabled;
  45
  46 unsigned int dbg_key_pending;
  47
  48 static Avatar avatar;
  49
  50 static float cam_dist = 0.0;
  51 static float floor_y;   // last floor height
  52 static float user_eye_height = 165;
  53
  54 static float walk_speed = 300.0f;
  55 static float mouse_speed = 0.5f;
  56 static bool show_walk_mesh, noclip = false;
  57
  58 static bool have_headtracking, have_handtracking, should_swap;
  59
  60 static int prev_mx, prev_my;
  61 static bool bnstate[8];
  62 static bool keystate[256];
  63 static bool gpad_bnstate[64];
  64 static Vec2 joy_move, joy_look;
  65 static float joy_deadzone = 0.01;
  66
  67 static float framerate;
  68
  69 static Mat4 view_matrix, mouse_view_matrix, proj_matrix;
  70 static MetaScene *mscn;
  71 static unsigned int sdr_post_gamma;
  72
  73 static long prev_msec;
  74
  75 static ExhibitManager *exman;
  76 static bool show_blobs;
  77
  78 ExSelection exsel_active, exsel_hover;
  79 ExSelection exsel_grab_left, exsel_grab_right;
  80 #define exsel_grab_mouse exsel_grab_right
  81 static ExhibitSlot exslot_left, exslot_right;
  82 #define exslot_mouse exslot_right
  83
  84 static Renderer *rend;
  85
  86 static Ray last_pick_ray;
  87
  88 static bool post_scene_init_pending = true;
  89
  90
  91 bool app_init(int argc, char **argv)
  92 {
  93         set_log_file("demo.log");
  94
  95         char *env = getenv("FPEXCEPT");
  96         if(env && atoi(env)) {
  97                 info_log("enabling floating point exceptions\n");
  98                 fpexcept_enabled = 1;
  99                 enable_fpexcept();
 100         }
 101
 102         if(init_opengl() == -1) {
 103                 return false;
 104         }
 105
 106         if(!init_options(argc, argv, "demo.conf")) {
 107                 return false;
 108         }
 109         app_resize(opt.width, opt.height);
 110         app_fullscreen(opt.fullscreen);
 111
 112         if(opt.vr) {
 113                 if(goatvr_init() == -1) {
 114                         return false;
 115                 }
 116                 goatvr_set_origin_mode(GOATVR_HEAD);
 117                 goatvr_set_units_scale(100.0f);
 118
 119                 goatvr_startvr();
 120                 should_swap = goatvr_should_swap() != 0;
 121                 user_eye_height = goatvr_get_eye_height();
 122                 have_headtracking = goatvr_have_headtracking();
 123                 have_handtracking = goatvr_have_handtracking();
 124
 125                 goatvr_recenter();
 126         }
 127
 128         if(fb_srgb) {
 129                 int srgb_capable;
 130                 glGetIntegerv(GL_FRAMEBUFFER_SRGB_CAPABLE_EXT, &srgb_capable);
 131                 printf("Framebuffer %s sRGB-capable\n", srgb_capable ? "is" : "is not");
 132                 if(srgb_capable) {
 133                         glEnable(GL_FRAMEBUFFER_SRGB);
 134                 } else {
 135                         fb_srgb = 0;
 136                 }
 137         }
 138
 139         glEnable(GL_MULTISAMPLE);
 140         glEnable(GL_DEPTH_TEST);
 141         glEnable(GL_CULL_FACE);
 142         glEnable(GL_NORMALIZE);
 143
 144         if(!init_debug_gui()) {
 145                 return false;
 146         }
 147
 148         Mesh::use_custom_sdr_attr = false;
 149
 150         float ambient[] = {0.0, 0.0, 0.0, 0.0};
 151         glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);
 152
 153         init_audio();
 154
 155         if(!init_vrhands()) {
 156                 return false;
 157         }
 158
 159         mscn = new MetaScene;
 160         if(!mscn->load(opt.scenefile ? opt.scenefile : "data/museum.scene")) {
 161                 return false;
 162         }
 163
 164         avatar.pos = mscn->start_pos;
 165         Vec3 dir = rotate(Vec3(0, 0, 1), mscn->start_rot);
 166         dir.y = 0;
 167         avatar.body_rot = rad_to_deg(acos(dot(dir, Vec3(0, 0, 1))));
 168
 169         exman = new ExhibitManager;
 170         // exhibits are loaded in post_scene_init, because they need access to the scene graph
 171
 172         if(!exui_init()) {
 173                 error_log("failed to initialize exhibit ui system\n");
 174                 return false;
 175         }
 176         exui_setnode(&exslot_left.node);
 177
 178         if(!fb_srgb) {
 179                 sdr_post_gamma = create_program_load("sdr/post_gamma.v.glsl", "sdr/post_gamma.p.glsl");
 180         }
 181
 182         rend = new Renderer;
 183         if(!rend->init()) {
 184                 return false;
 185         }
 186         rend->set_scene(mscn);
 187
 188         glUseProgram(0);
 189
 190         if(opt.vr || opt.fullscreen) {
 191                 app_grab_mouse(true);
 192         }
 193
 194         if(mscn->music && opt.music) {
 195                 mscn->music->play(AUDIO_PLAYMODE_LOOP);
 196         }
 197         return true;
 198 }
 199
 200 // post_scene_init is called after the scene has completed loading
 201 static void post_scene_init()
 202 {
 203         mscn->update(0);        // update once to calculate node matrices
 204
 205         int num_mir = mscn->calc_mirror_planes();
 206         info_log("found %d mirror planes\n", num_mir);
 207
 208         exman->load(mscn, "data/exhibits");
 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         if(post_scene_init_pending && !sceneman.pending()) {
 263                 post_scene_init_pending = false;
 264                 post_scene_init();
 265         }
 266
 267         mscn->update(dt);
 268         exman->update(dt);
 269         exui_update(dt);
 270
 271         float speed = walk_speed * dt;
 272         Vec3 dir;
 273
 274         // joystick
 275         float jdeadsq = joy_deadzone * joy_deadzone;
 276         float jmove_lensq = length_sq(joy_move);
 277         float jlook_lensq = length_sq(joy_look);
 278
 279         if(jmove_lensq > jdeadsq) {
 280                 float len = sqrt(jmove_lensq);
 281                 jmove_lensq -= jdeadsq;
 282
 283                 float mag = len * len;
 284                 dir.x += mag * joy_move.x / len * 2.0 * speed;
 285                 dir.z += mag * joy_move.y / len * 2.0 * speed;
 286         }
 287         if(jlook_lensq > jdeadsq) {
 288                 float len = sqrt(jlook_lensq);
 289                 jlook_lensq -= jdeadsq;
 290
 291                 float mag = len * len;
 292                 avatar.body_rot += mag * joy_look.x / len * 200.0 * dt;
 293                 avatar.head_alt += mag * joy_look.y / len * 100.0 * dt;
 294                 if(avatar.head_alt < -90.0f) avatar.head_alt = -90.0f;
 295                 if(avatar.head_alt > 90.0f) avatar.head_alt = 90.0f;
 296         }
 297
 298         // keyboard move
 299         if(keystate[(int)'w']) {
 300                 dir.z -= speed;
 301         }
 302         if(keystate[(int)'s']) {
 303                 dir.z += speed;
 304         }
 305         if(keystate[(int)'d']) {
 306                 dir.x += speed;
 307         }
 308         if(keystate[(int)'a']) {
 309                 dir.x -= speed;
 310         }
 311         if(keystate[(int)'q'] || gpad_bnstate[GPAD_UP]) {
 312                 avatar.pos.y += speed;
 313         }
 314         if(keystate[(int)'z'] || gpad_bnstate[GPAD_DOWN]) {
 315                 avatar.pos.y -= speed;
 316         }
 317
 318         float theta = M_PI * avatar.body_rot / 180.0f;
 319         Vec3 newpos;
 320         newpos.x = avatar.pos.x + cos(theta) * dir.x - sin(theta) * dir.z;
 321         newpos.y = avatar.pos.y;
 322         newpos.z = avatar.pos.z + sin(theta) * dir.x + cos(theta) * dir.z;
 323
 324         if(noclip) {
 325                 avatar.pos = newpos;
 326         } else {
 327                 if(!constrain_walk_mesh(newpos, &avatar.pos)) {
 328                         float dtheta = M_PI / 32.0;
 329                         float theta = dtheta;
 330                         Vec2 dir2d = newpos.xz() - avatar.pos.xz();
 331
 332                         for(int i=0; i<16; i++) {
 333                                 Vec2 dvec = rotate(dir2d, theta);
 334                                 Vec3 pos = avatar.pos + Vec3(dvec.x, 0, dvec.y);
 335                                 if(constrain_walk_mesh(pos, &avatar.pos)) {
 336                                         break;
 337                                 }
 338                                 dvec = rotate(dir2d, -theta);
 339                                 pos = avatar.pos + Vec3(dvec.x, 0, dvec.y);
 340                                 if(constrain_walk_mesh(pos, &avatar.pos)) {
 341                                         break;
 342                                 }
 343                                 theta += dtheta;
 344                         }
 345                 }
 346                 floor_y = avatar.pos.y - user_eye_height;
 347         }
 348
 349         // TODO move to the avatar system
 350         // calculate mouselook view matrix
 351         mouse_view_matrix = Mat4::identity;
 352         mouse_view_matrix.pre_translate(0, 0, -cam_dist);
 353         if(!have_headtracking) {
 354                 mouse_view_matrix.pre_rotate_x(deg_to_rad(avatar.head_alt));
 355         }
 356         mouse_view_matrix.pre_rotate_y(deg_to_rad(avatar.body_rot));
 357         mouse_view_matrix.pre_translate(-avatar.pos.x, -avatar.pos.y, -avatar.pos.z);
 358
 359
 360         // update hand-tracking
 361         if(have_handtracking) {
 362                 update_vrhands(&avatar);
 363
 364                 if(vrhand[0].valid) {
 365                         exslot_left.node.set_position(vrhand[0].pos);
 366                         exslot_left.node.set_rotation(vrhand[0].rot);
 367
 368                         // right hand takes precedence for hover
 369                         if(!exsel_grab_left && !exsel_hover) {
 370                                 exsel_hover = exman->select(Sphere(vrhand[0].pos, 5));
 371                         }
 372                 }
 373                 if(vrhand[1].valid) {
 374                         exslot_right.node.set_position(vrhand[1].pos);
 375                         exslot_right.node.set_rotation(vrhand[1].rot);
 376
 377                         if(!exsel_grab_right) {
 378                                 exsel_hover = exman->select(Sphere(vrhand[1].pos, 5));
 379                         }
 380                 }
 381
 382         } else {
 383                 // check if an exhibit is hovered-over by mouse (only if we don't have one grabbed)
 384                 if(!exsel_grab_mouse) {
 385                         Ray ray = calc_pick_ray(prev_mx, prev_my);
 386                         exsel_hover = exman->select(ray);
 387                 }
 388
 389                 // TODO do this properly
 390                 // set the position of the left hand at a suitable position for the exhibit UI
 391                 dir = rotate(Vec3(-0.46, -0.1, -1), Vec3(0, 1, 0), deg_to_rad(-avatar.body_rot));
 392                 exslot_left.node.set_position(avatar.pos + dir * 30); // magic: distance in front
 393         }
 394
 395         if(!exslot_right.empty()) exslot_right.node.update(dt);
 396         // always update the left slot, because it's the anchor point of the exhibit ui
 397         exslot_left.node.update(dt);
 398 }
 399
 400 void app_display()
 401 {
 402         float dt = (float)(time_msec - prev_msec) / 1000.0f;
 403         prev_msec = time_msec;
 404
 405         if(debug_gui) {
 406                 ImGui::GetIOPtr()->DeltaTime = dt;
 407                 ImGui::NewFrame();
 408
 409                 //ImGui::ShowTestWindow();
 410         }
 411
 412         glClearColor(1, 1, 1, 1);
 413
 414         if(opt.vr) {
 415                 // VR mode
 416                 goatvr_draw_start();
 417                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 418
 419                 update(dt);
 420
 421                 for(int i=0; i<2; i++) {
 422                         // for each eye
 423                         goatvr_draw_eye(i);
 424                         vp_width = goatvr_get_fb_eye_width(i);
 425                         vp_height = goatvr_get_fb_eye_height(i);
 426
 427                         proj_matrix = goatvr_projection_matrix(i, NEAR_CLIP, FAR_CLIP);
 428                         glMatrixMode(GL_PROJECTION);
 429                         glLoadMatrixf(proj_matrix[0]);
 430
 431                         view_matrix = mouse_view_matrix * Mat4(goatvr_view_matrix(i));
 432                         glMatrixMode(GL_MODELVIEW);
 433                         glLoadMatrixf(view_matrix[0]);
 434
 435                         draw_scene();
 436                         if(have_handtracking) {
 437                                 draw_vrhands();
 438                         }
 439
 440                         if(debug_gui) {
 441                                 ImGui::Render();
 442                         }
 443                 }
 444                 goatvr_draw_done();
 445
 446                 vp_width = win_width;
 447                 vp_height = win_height;
 448
 449                 if(should_swap) {
 450                         app_swap_buffers();
 451                 }
 452
 453         } else {
 454                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 455
 456                 update(dt);
 457
 458                 proj_matrix.perspective(deg_to_rad(50.0), win_aspect, NEAR_CLIP, FAR_CLIP);
 459                 glMatrixMode(GL_PROJECTION);
 460                 glLoadMatrixf(proj_matrix[0]);
 461
 462                 view_matrix = mouse_view_matrix;
 463                 glMatrixMode(GL_MODELVIEW);
 464                 glLoadMatrixf(view_matrix[0]);
 465
 466                 draw_scene();
 467
 468                 if(!fb_srgb && sdr_post_gamma) {
 469                         slow_post(sdr_post_gamma);
 470                         glUseProgram(0);
 471                 }
 472
 473                 if(debug_gui) {
 474                         ImGui::Render();
 475                 }
 476                 app_swap_buffers();
 477         }
 478         assert(glGetError() == GL_NO_ERROR);
 479
 480         calc_framerate();
 481 }
 482
 483
 484 static void draw_scene()
 485 {
 486         rend->draw();
 487         exman->draw();
 488
 489         if(have_handtracking) {
 490                 Mat4 head_xform = inverse(mouse_view_matrix);//goatvr_head_matrix();
 491                 Mat4 head_dir_xform = head_xform.upper3x3();
 492
 493                 glUseProgram(0);
 494                 glPushAttrib(GL_ENABLE_BIT);
 495                 glDisable(GL_LIGHTING);
 496                 glBegin(GL_LINES);
 497                 for(int i=0; i<2; i++) {
 498                         if(vrhand[i].valid) {
 499                                 glColor3f(i, 1 - i, i);
 500                         } else {
 501                                 glColor3f(0.5, 0.5, 0.5);
 502                         }
 503                         Vec3 v = head_xform * vrhand[i].pos;
 504                         Vec3 dir = head_dir_xform * rotate(Vec3(0, 0, -1), vrhand[i].rot) * 20.0f;
 505                         Vec3 up = head_dir_xform * rotate(Vec3(0, 1, 0), vrhand[i].rot) * 10.0f;
 506                         Vec3 right = head_dir_xform * rotate(Vec3(1, 0, 0), vrhand[i].rot) * 10.0f;
 507
 508                         glVertex3f(v.x, v.y, v.z);
 509                         glVertex3f(v.x + dir.x, v.y + dir.y, v.z + dir.z);
 510                         glVertex3f(v.x - right.x, v.y - right.y, v.z - right.z);
 511                         glVertex3f(v.x + right.x, v.y + right.y, v.z + right.z);
 512                         glVertex3f(v.x - up.x, v.y - up.y, v.z - up.z);
 513                         glVertex3f(v.x + up.x, v.y + up.y, v.z + up.z);
 514                 }
 515                 glEnd();
 516                 glPopAttrib();
 517         }
 518
 519         if(debug_gui && dbg_sel_node) {
 520                 AABox bvol = dbg_sel_node->get_bounds();
 521                 draw_geom_object(&bvol);
 522         }
 523
 524         if(show_walk_mesh && mscn->walk_mesh) {
 525                 glPushAttrib(GL_ENABLE_BIT);
 526                 glEnable(GL_BLEND);
 527                 glBlendFunc(GL_ONE, GL_ONE);
 528                 glEnable(GL_POLYGON_OFFSET_FILL);
 529
 530                 glUseProgram(0);
 531
 532                 glPolygonOffset(-1, 1);
 533                 glDepthMask(0);
 534
 535                 glColor3f(0.3, 0.08, 0.01);
 536                 mscn->walk_mesh->draw();
 537
 538                 glDepthMask(1);
 539
 540                 glPopAttrib();
 541         }
 542
 543         exui_draw();
 544
 545         print_text(Vec2(9 * win_width / 10, 20), Vec3(1, 1, 0), "fps: %.1f", framerate);
 546         draw_ui();
 547 }
 548
 549
 550 void app_reshape(int x, int y)
 551 {
 552         glViewport(0, 0, x, y);
 553         goatvr_set_fb_size(x, y, 1.0f);
 554         debug_gui_reshape(x, y);
 555
 556         vp_width = x;
 557         vp_height = y;
 558 }
 559
 560 void app_keyboard(int key, bool pressed)
 561 {
 562         unsigned int mod = app_get_modifiers();
 563
 564         if(debug_gui && !(pressed && (key == '`' || key == 27))) {
 565                 debug_gui_key(key, pressed, mod);
 566                 return; // ignore all keystrokes when GUI is visible
 567         }
 568
 569         if(pressed) {
 570                 switch(key) {
 571                 case 27:
 572                         app_quit();
 573                         break;
 574
 575                 case '\n':
 576                 case '\r':
 577                         if(mod & MOD_ALT) {
 578                                 app_toggle_fullscreen();
 579                         }
 580                         break;
 581
 582                 case '`':
 583                         debug_gui = !debug_gui;
 584                         show_message("debug gui %s", debug_gui ? "enabled" : "disabled");
 585                         break;
 586
 587                 case 'm':
 588                         app_toggle_grab_mouse();
 589                         show_message("mouse %s", app_is_mouse_grabbed() ? "grabbed" : "released");
 590                         break;
 591
 592                 case 'w':
 593                         if(mod & MOD_CTRL) {
 594                                 show_walk_mesh = !show_walk_mesh;
 595                                 show_message("walk mesh: %s", show_walk_mesh ? "on" : "off");
 596                         }
 597                         break;
 598
 599                 case 'c':
 600                         if(mod & MOD_CTRL) {
 601                                 noclip = !noclip;
 602                                 show_message(noclip ? "no clip" : "clip");
 603                         }
 604                         break;
 605
 606                 case 'f':
 607                         toggle_flight();
 608                         break;
 609
 610                 case 'p':
 611                         if(mod & MOD_CTRL) {
 612                                 fb_srgb = !fb_srgb;
 613                                 show_message("gamma correction for non-sRGB framebuffers: %s\n", fb_srgb ? "off" : "on");
 614                         }
 615                         break;
 616
 617                 case '=':
 618                         walk_speed *= 1.25;
 619                         show_message("walk speed: %g", walk_speed);
 620                         break;
 621
 622                 case '-':
 623                         walk_speed *= 0.75;
 624                         show_message("walk speed: %g", walk_speed);
 625                         break;
 626
 627                 case ']':
 628                         mouse_speed *= 1.2;
 629                         show_message("mouse speed: %g", mouse_speed);
 630                         break;
 631
 632                 case '[':
 633                         mouse_speed *= 0.8;
 634                         show_message("mouse speed: %g", mouse_speed);
 635                         break;
 636
 637                 case 'b':
 638                         show_blobs = !show_blobs;
 639                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 640                         break;
 641
 642                 case ' ':
 643                         goatvr_recenter();
 644                         show_message("VR recenter\n");
 645                         break;
 646
 647                 case KEY_UP:
 648                         exui_scroll(-1);
 649                         break;
 650
 651                 case KEY_DOWN:
 652                         exui_scroll(1);
 653                         break;
 654
 655                 case KEY_LEFT:
 656                         exui_change_tab(-1);
 657                         break;
 658
 659                 case KEY_RIGHT:
 660                         exui_change_tab(1);
 661                         break;
 662
 663                 case KEY_F5:
 664                 case KEY_F6:
 665                 case KEY_F7:
 666                 case KEY_F8:
 667                         dbg_key_pending |= 1 << (key - KEY_F5);
 668                         break;
 669                 }
 670         }
 671
 672         if(key < 256 && !(mod & (MOD_CTRL | MOD_ALT))) {
 673                 keystate[key] = pressed;
 674         }
 675 }
 676
 677 void app_mouse_button(int bn, bool pressed, int x, int y)
 678 {
 679         static int press_x, press_y;
 680
 681         if(debug_gui) {
 682                 debug_gui_mbutton(bn, pressed, x, y);
 683                 return; // ignore mouse events while GUI is visible
 684         }
 685
 686         prev_mx = x;
 687         prev_my = y;
 688         bnstate[bn] = pressed;
 689
 690         if(bn == 0) {
 691                 ExSelection sel;
 692                 Ray ray = calc_pick_ray(x, y);
 693                 sel = exman->select(ray);
 694
 695                 if(pressed) {
 696                         if(sel && (app_get_modifiers() & MOD_CTRL)) {
 697                                 exsel_grab_mouse = sel;
 698                                 Vec3 pos = sel.ex->node->get_position();
 699                                 debug_log("grabbing... (%g %g %g)\n", pos.x, pos.y, pos.z);
 700                                 exslot_mouse.node.set_position(pos);
 701                                 exslot_mouse.node.set_rotation(sel.ex->node->get_rotation());
 702                                 exslot_mouse.attach_exhibit(sel.ex, EXSLOT_ATTACH_TRANSIENT);
 703                                 if(exsel_active) {
 704                                         exsel_active = ExSelection::null;       // cancel active on grab
 705                                 }
 706                         }
 707                         press_x = x;
 708                         press_y = y;
 709
 710                 } else {
 711                         if(exsel_grab_mouse) {
 712                                 // cancel grab on mouse release
 713                                 Exhibit *ex = exsel_grab_mouse.ex;
 714                                 Vec3 pos = exslot_mouse.node.get_position();
 715
 716                                 debug_log("releasing at %g %g %g ...\n", pos.x, pos.y, pos.z);
 717
 718                                 exslot_mouse.detach_exhibit();
 719
 720                                 ExhibitSlot *slot = exman->nearest_empty_slot(pos, 100);
 721                                 if(!slot) {
 722                                         debug_log("no empty slot nearby\n");
 723                                         if(ex->prev_slot && ex->prev_slot->empty()) {
 724                                                 slot = ex->prev_slot;
 725                                                 debug_log("using previous slot");
 726                                         }
 727                                 }
 728
 729                                 if(slot) {
 730                                         slot->attach_exhibit(ex);
 731                                 } else {
 732                                         // nowhere to put it, so stash it for later
 733                                         exslot_mouse.detach_exhibit();
 734                                         exman->stash_exhibit(ex);
 735                                         debug_log("no slots available, stashing\n");
 736                                 }
 737
 738                                 exsel_grab_mouse = ExSelection::null;
 739                         }
 740
 741                         if(abs(press_x - x) < 5 && abs(press_y - y) < 5) {
 742                                 exsel_active = sel;     // select or deselect active exhibit
 743                                 if(sel) {
 744                                         debug_log("selecting...\n");
 745                                 } else {
 746                                         debug_log("deselecting...\n");
 747                                 }
 748                         }
 749
 750                         press_x = press_y = INT_MIN;
 751                 }
 752         }
 753 }
 754
 755 static inline void mouse_look(float dx, float dy)
 756 {
 757         float scrsz = (float)win_height;
 758         avatar.body_rot += dx * 512.0 / scrsz;
 759         avatar.head_alt += dy * 512.0 / scrsz;
 760
 761         if(avatar.head_alt < -90) avatar.head_alt = -90;
 762         if(avatar.head_alt > 90) avatar.head_alt = 90;
 763 }
 764
 765 static void mouse_zoom(float dx, float dy)
 766 {
 767         cam_dist += dy * 0.1;
 768         if(cam_dist < 0.0) cam_dist = 0.0;
 769 }
 770
 771 void app_mouse_motion(int x, int y)
 772 {
 773         if(debug_gui) {
 774                 debug_gui_mmotion(x, y);
 775                 return; // ignore mouse events while GUI is visible
 776         }
 777
 778         int dx = x - prev_mx;
 779         int dy = y - prev_my;
 780         prev_mx = x;
 781         prev_my = y;
 782
 783         if(!dx && !dy) return;
 784
 785         if(exsel_grab_mouse) {
 786                 Vec3 pos = exslot_mouse.node.get_node_position();
 787                 Vec3 dir = transpose(view_matrix.upper3x3()) * Vec3(dx * 1.0, dy * -1.0, 0);
 788
 789                 exslot_mouse.node.set_position(pos + dir);
 790         }
 791
 792         if(bnstate[2]) {
 793                 mouse_look(dx, dy);
 794         }
 795 }
 796
 797 void app_mouse_delta(int dx, int dy)
 798 {
 799         if(bnstate[2]) {
 800                 mouse_zoom(dx * mouse_speed, dy * mouse_speed);
 801         } else {
 802                 mouse_look(dx * mouse_speed, dy * mouse_speed);
 803         }
 804 }
 805
 806 void app_mouse_wheel(int dir)
 807 {
 808         if(debug_gui) {
 809                 debug_gui_wheel(dir);
 810         }
 811 }
 812
 813 void app_gamepad_axis(int axis, float val)
 814 {
 815         switch(axis) {
 816         case 0:
 817                 joy_move.x = val;
 818                 break;
 819         case 1:
 820                 joy_move.y = val;
 821                 break;
 822
 823         case 2:
 824                 joy_look.x = val;
 825                 break;
 826         case 3:
 827                 joy_look.y = val;
 828                 break;
 829         }
 830 }
 831
 832 void app_gamepad_button(int bn, bool pressed)
 833 {
 834         gpad_bnstate[bn] = pressed;
 835
 836         if(pressed) {
 837                 switch(bn) {
 838                 case GPAD_LSTICK:
 839                         toggle_flight();
 840                         break;
 841
 842                 case GPAD_X:
 843                         show_blobs = !show_blobs;
 844                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 845                         break;
 846
 847                 case GPAD_START:
 848                         goatvr_recenter();
 849                         show_message("VR recenter\n");
 850                         break;
 851
 852                 default:
 853                         break;
 854                 }
 855         }
 856 }
 857
 858 static void toggle_flight()
 859 {
 860         static float prev_walk_speed = -1.0;
 861         if(prev_walk_speed < 0.0) {
 862                 noclip = true;
 863                 prev_walk_speed = walk_speed;
 864                 walk_speed = 1000.0;
 865                 show_message("fly mode\n");
 866         } else {
 867                 noclip = false;
 868                 walk_speed = prev_walk_speed;
 869                 prev_walk_speed = -1.0;
 870                 show_message("walk mode\n");
 871         }
 872 }
 873
 874 static void calc_framerate()
 875 {
 876         //static int ncalc;
 877         static int nframes;
 878         static long prev_upd;
 879
 880         long elapsed = time_msec - prev_upd;
 881         if(elapsed >= 1000) {
 882                 framerate = (float)nframes / (float)(elapsed * 0.001);
 883                 nframes = 1;
 884                 prev_upd = time_msec;
 885
 886                 /*if(++ncalc >= 5) {
 887                         printf("fps: %f\n", framerate);
 888                         ncalc = 0;
 889                 }*/
 890         } else {
 891                 ++nframes;
 892         }
 893 }
 894
 895 static Ray calc_pick_ray(int x, int y)
 896 {
 897         float nx = (float)x / (float)win_width;
 898         float ny = (float)(win_height - y) / (float)win_height;
 899
 900         last_pick_ray = mouse_pick_ray(nx, ny, view_matrix, proj_matrix);
 901         return last_pick_ray;
 902 }