git.mutantstargoat.com Git - laserbrain_demo/blob - src/app.cc

   1 #include <stdio.h>
   2 #include <assert.h>
   3 #include <goatvr.h>
   4 #include "app.h"
   5 #include "opengl.h"
   6 #include "sdr.h"
   7 #include "texture.h"
   8 #include "mesh.h"
   9 #include "meshgen.h"
  10 #include "scene.h"
  11 #include "metascene.h"
  12 #include "datamap.h"
  13 #include "ui.h"
  14 #include "opt.h"
  15 #include "post.h"
  16 #include "renderer.h"
  17 #include "avatar.h"
  18 #include "vrinput.h"
  19 #include "exman.h"
  20 #include "blob_exhibit.h"
  21 #include "dbg_gui.h"
  22
  23 #define NEAR_CLIP       5.0
  24 #define FAR_CLIP        10000.0
  25
  26 static void draw_scene();
  27 static void toggle_flight();
  28 static void calc_framerate();
  29 static Ray calc_pick_ray(int x, int y, const Mat4 &view_mat, const Mat4 &proj_mat);
  30
  31 long time_msec;
  32 int win_width, win_height;
  33 float win_aspect;
  34 bool fb_srgb;
  35 bool opt_gear_wireframe;
  36
  37 TextureSet texman;
  38 SceneSet sceneman;
  39
  40 unsigned int sdr_ltmap, sdr_ltmap_notex;
  41
  42 static Avatar avatar;
  43
  44 static float cam_dist = 0.0;
  45 static float floor_y;   // last floor height
  46 static float user_eye_height = 165;
  47
  48 static float walk_speed = 300.0f;
  49 static float mouse_speed = 0.5f;
  50 static bool show_walk_mesh, noclip = false;
  51
  52 static bool have_headtracking, have_handtracking, should_swap;
  53
  54 static int prev_mx, prev_my;
  55 static bool bnstate[8];
  56 static bool keystate[256];
  57 static bool gpad_bnstate[64];
  58 static Vec2 joy_move, joy_look;
  59 static float joy_deadzone = 0.01;
  60
  61 static float framerate;
  62
  63 static Mat4 view_matrix, mouse_view_matrix, proj_matrix;
  64 static MetaScene *mscn;
  65 static unsigned int sdr_post_gamma;
  66
  67 static long prev_msec;
  68
  69 static ExhibitManager *exman;
  70 static BlobExhibit *blobs;
  71 static bool show_blobs;
  72
  73 static ExSelection ex_sel;
  74
  75 static Renderer *rend;
  76
  77
  78 bool app_init(int argc, char **argv)
  79 {
  80         set_log_file("demo.log");
  81
  82         if(init_opengl() == -1) {
  83                 return false;
  84         }
  85
  86         if(!init_options(argc, argv, "demo.conf")) {
  87                 return false;
  88         }
  89         app_resize(opt.width, opt.height);
  90         app_fullscreen(opt.fullscreen);
  91
  92         if(opt.vr) {
  93                 if(goatvr_init() == -1) {
  94                         return false;
  95                 }
  96                 goatvr_set_origin_mode(GOATVR_HEAD);
  97                 goatvr_set_units_scale(100.0f);
  98
  99                 goatvr_startvr();
 100                 should_swap = goatvr_should_swap() != 0;
 101                 user_eye_height = goatvr_get_eye_height();
 102                 have_headtracking = goatvr_have_headtracking();
 103                 have_handtracking = goatvr_have_handtracking();
 104
 105                 goatvr_recenter();
 106         }
 107
 108         if(fb_srgb) {
 109                 int srgb_capable;
 110                 glGetIntegerv(GL_FRAMEBUFFER_SRGB_CAPABLE_EXT, &srgb_capable);
 111                 printf("Framebuffer %s sRGB-capable\n", srgb_capable ? "is" : "is not");
 112                 if(srgb_capable) {
 113                         glEnable(GL_FRAMEBUFFER_SRGB);
 114                 } else {
 115                         fb_srgb = 0;
 116                 }
 117         }
 118
 119         glEnable(GL_MULTISAMPLE);
 120         glEnable(GL_DEPTH_TEST);
 121         glEnable(GL_CULL_FACE);
 122         glEnable(GL_LIGHTING);
 123         glEnable(GL_NORMALIZE);
 124
 125         if(!init_debug_gui()) {
 126                 return false;
 127         }
 128
 129         Mesh::use_custom_sdr_attr = false;
 130
 131         float ambient[] = {0.0, 0.0, 0.0, 0.0};
 132         glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);
 133
 134         glClearColor(1, 1, 1, 1);
 135
 136         init_audio();
 137
 138         if(!init_vrhands()) {
 139                 return false;
 140         }
 141
 142         mscn = new MetaScene;
 143         if(!mscn->load(opt.scenefile ? opt.scenefile : "data/museum.scene")) {
 144                 return false;
 145         }
 146
 147         avatar.pos = mscn->start_pos;
 148         Vec3 dir = rotate(Vec3(0, 0, 1), mscn->start_rot);
 149         dir.y = 0;
 150         avatar.body_rot = rad_to_deg(acos(dot(dir, Vec3(0, 0, 1))));
 151
 152         exman = new ExhibitManager;
 153         /*
 154         if(!exman->load(mscn, "data/exhibits")) {
 155                 //return false;
 156         }
 157         */
 158
 159         blobs = new BlobExhibit;
 160         blobs->node = new SceneNode;
 161         blobs->init();
 162         blobs->node->set_position(Vec3(-680, 160, -100));
 163         blobs->node->set_scaling(Vec3(28, 28, 28));
 164         blobs->node->update(0);
 165
 166         exman->add(blobs);
 167
 168         if(!(sdr_ltmap_notex = create_program_load("sdr/lightmap.v.glsl", "sdr/lightmap-notex.p.glsl"))) {
 169                 return false;
 170         }
 171         set_uniform_int(sdr_ltmap_notex, "texmap", MTL_TEX_DIFFUSE);
 172         set_uniform_int(sdr_ltmap_notex, "lightmap", MTL_TEX_LIGHTMAP);
 173
 174         if(!(sdr_ltmap = create_program_load("sdr/lightmap.v.glsl", "sdr/lightmap-tex.p.glsl"))) {
 175                 return false;
 176         }
 177         set_uniform_int(sdr_ltmap, "texmap", MTL_TEX_DIFFUSE);
 178         set_uniform_int(sdr_ltmap, "lightmap", MTL_TEX_LIGHTMAP);
 179
 180         if(!fb_srgb) {
 181                 sdr_post_gamma = create_program_load("sdr/post_gamma.v.glsl", "sdr/post_gamma.p.glsl");
 182         }
 183
 184         rend = new Renderer;
 185         rend->set_scene(mscn);
 186
 187         glUseProgram(0);
 188
 189         if(opt.vr || opt.fullscreen) {
 190                 app_grab_mouse(true);
 191         }
 192
 193         if(mscn->music && opt.music) {
 194                 mscn->music->play(AUDIO_PLAYMODE_LOOP);
 195         }
 196         return true;
 197 }
 198
 199 void app_cleanup()
 200 {
 201         if(mscn->music) {
 202                 mscn->music->stop();
 203         }
 204         destroy_audio();
 205
 206         app_grab_mouse(false);
 207         if(opt.vr) {
 208                 goatvr_shutdown();
 209         }
 210         destroy_vrhands();
 211
 212         delete rend;
 213
 214         delete exman;
 215
 216         texman.clear();
 217         sceneman.clear();
 218
 219         cleanup_debug_gui();
 220 }
 221
 222 static bool constrain_walk_mesh(const Vec3 &v, Vec3 *newv)
 223 {
 224         Mesh *wm = mscn->walk_mesh;
 225         if(!wm) {
 226                 *newv = v;
 227                 return true;
 228         }
 229
 230         Ray downray = Ray(v, Vec3(0, -1, 0));
 231         HitPoint hit;
 232         if(mscn->walk_mesh->intersect(downray, &hit)) {
 233                 *newv = hit.pos;
 234                 newv->y += user_eye_height;
 235                 return true;
 236         }
 237         return false;
 238 }
 239
 240 static void update(float dt)
 241 {
 242         texman.update();
 243         sceneman.update();
 244
 245         mscn->update(dt);
 246         exman->update(dt);
 247
 248         float speed = walk_speed * dt;
 249         Vec3 dir;
 250
 251         // joystick
 252         float jdeadsq = joy_deadzone * joy_deadzone;
 253         float jmove_lensq = length_sq(joy_move);
 254         float jlook_lensq = length_sq(joy_look);
 255
 256         if(jmove_lensq > jdeadsq) {
 257                 float len = sqrt(jmove_lensq);
 258                 jmove_lensq -= jdeadsq;
 259
 260                 float mag = len * len;
 261                 dir.x += mag * joy_move.x / len * 2.0 * speed;
 262                 dir.z += mag * joy_move.y / len * 2.0 * speed;
 263         }
 264         if(jlook_lensq > jdeadsq) {
 265                 float len = sqrt(jlook_lensq);
 266                 jlook_lensq -= jdeadsq;
 267
 268                 float mag = len * len;
 269                 avatar.body_rot += mag * joy_look.x / len * 200.0 * dt;
 270                 avatar.head_alt += mag * joy_look.y / len * 100.0 * dt;
 271                 if(avatar.head_alt < -90.0f) avatar.head_alt = -90.0f;
 272                 if(avatar.head_alt > 90.0f) avatar.head_alt = 90.0f;
 273         }
 274
 275         // keyboard move
 276         if(keystate[(int)'w']) {
 277                 dir.z -= speed;
 278         }
 279         if(keystate[(int)'s']) {
 280                 dir.z += speed;
 281         }
 282         if(keystate[(int)'d']) {
 283                 dir.x += speed;
 284         }
 285         if(keystate[(int)'a']) {
 286                 dir.x -= speed;
 287         }
 288         if(keystate[(int)'q'] || gpad_bnstate[GPAD_UP]) {
 289                 avatar.pos.y += speed;
 290         }
 291         if(keystate[(int)'z'] || gpad_bnstate[GPAD_DOWN]) {
 292                 avatar.pos.y -= speed;
 293         }
 294
 295         float theta = M_PI * avatar.body_rot / 180.0f;
 296         Vec3 newpos;
 297         newpos.x = avatar.pos.x + cos(theta) * dir.x - sin(theta) * dir.z;
 298         newpos.y = avatar.pos.y;
 299         newpos.z = avatar.pos.z + sin(theta) * dir.x + cos(theta) * dir.z;
 300
 301         if(noclip) {
 302                 avatar.pos = newpos;
 303         } else {
 304                 if(!constrain_walk_mesh(newpos, &avatar.pos)) {
 305                         float dtheta = M_PI / 32.0;
 306                         float theta = dtheta;
 307                         Vec2 dir2d = newpos.xz() - avatar.pos.xz();
 308
 309                         for(int i=0; i<16; i++) {
 310                                 Vec2 dvec = rotate(dir2d, theta);
 311                                 Vec3 pos = avatar.pos + Vec3(dvec.x, 0, dvec.y);
 312                                 if(constrain_walk_mesh(pos, &avatar.pos)) {
 313                                         break;
 314                                 }
 315                                 dvec = rotate(dir2d, -theta);
 316                                 pos = avatar.pos + Vec3(dvec.x, 0, dvec.y);
 317                                 if(constrain_walk_mesh(pos, &avatar.pos)) {
 318                                         break;
 319                                 }
 320                                 theta += dtheta;
 321                         }
 322                 }
 323                 floor_y = avatar.pos.y - user_eye_height;
 324         }
 325
 326         // TODO move to avatar
 327         // calculate mouselook view matrix
 328         mouse_view_matrix = Mat4::identity;
 329         mouse_view_matrix.pre_translate(0, 0, -cam_dist);
 330         if(!have_headtracking) {
 331                 mouse_view_matrix.pre_rotate_x(deg_to_rad(avatar.head_alt));
 332         }
 333         mouse_view_matrix.pre_rotate_y(deg_to_rad(avatar.body_rot));
 334         mouse_view_matrix.pre_translate(-avatar.pos.x, -avatar.pos.y, -avatar.pos.z);
 335
 336         // update hand-tracking
 337         if(have_handtracking) {
 338                 update_vrhands(&avatar);
 339         }
 340 }
 341
 342 static void set_light(int idx, const Vec3 &pos, const Vec3 &color)
 343 {
 344         unsigned int lt = GL_LIGHT0 + idx;
 345         float posv[] = { pos.x, pos.y, pos.z, 1 };
 346         float colv[] = { color.x, color.y, color.z, 1 };
 347
 348         glEnable(lt);
 349         glLightfv(lt, GL_POSITION, posv);
 350         glLightfv(lt, GL_DIFFUSE, colv);
 351         glLightfv(lt, GL_SPECULAR, colv);
 352 }
 353
 354 void app_display()
 355 {
 356         float dt = (float)(time_msec - prev_msec) / 1000.0f;
 357         prev_msec = time_msec;
 358
 359         if(debug_gui) {
 360                 ImGui::GetIOPtr()->DeltaTime = dt;
 361                 ImGui::NewFrame();
 362
 363                 ImGui::ShowTestWindow();
 364         }
 365
 366         if(opt.vr) {
 367                 // VR mode
 368                 goatvr_draw_start();
 369                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 370
 371                 update(dt);
 372
 373                 for(int i=0; i<2; i++) {
 374                         // for each eye
 375                         goatvr_draw_eye(i);
 376
 377                         proj_matrix = goatvr_projection_matrix(i, NEAR_CLIP, FAR_CLIP);
 378                         glMatrixMode(GL_PROJECTION);
 379                         glLoadMatrixf(proj_matrix[0]);
 380
 381                         view_matrix = mouse_view_matrix * Mat4(goatvr_view_matrix(i));
 382                         glMatrixMode(GL_MODELVIEW);
 383                         glLoadMatrixf(view_matrix[0]);
 384
 385                         draw_scene();
 386                         if(have_handtracking) {
 387                                 draw_vrhands();
 388                         }
 389
 390                         if(debug_gui) {
 391                                 ImGui::Render();
 392                         }
 393                 }
 394                 goatvr_draw_done();
 395
 396                 if(should_swap) {
 397                         app_swap_buffers();
 398                 }
 399
 400         } else {
 401                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 402
 403                 update(dt);
 404
 405                 proj_matrix.perspective(deg_to_rad(50.0), win_aspect, NEAR_CLIP, FAR_CLIP);
 406                 glMatrixMode(GL_PROJECTION);
 407                 glLoadMatrixf(proj_matrix[0]);
 408
 409                 view_matrix = mouse_view_matrix;
 410                 glMatrixMode(GL_MODELVIEW);
 411                 glLoadMatrixf(view_matrix[0]);
 412
 413                 draw_scene();
 414
 415                 if(!fb_srgb && sdr_post_gamma) {
 416                         slow_post(sdr_post_gamma);
 417                         glUseProgram(0);
 418                 }
 419
 420                 if(debug_gui) {
 421                         ImGui::Render();
 422                 }
 423                 app_swap_buffers();
 424         }
 425         assert(glGetError() == GL_NO_ERROR);
 426
 427         calc_framerate();
 428 }
 429
 430
 431 static void draw_scene()
 432 {
 433         static const Vec3 lpos[] = { Vec3(-50, 75, 100), Vec3(100, 0, 30), Vec3(-10, -10, 60) };
 434         set_light(0, lpos[0], Vec3(1.0, 0.8, 0.7) * 0.8);
 435         set_light(1, lpos[1], Vec3(0.6, 0.7, 1.0) * 0.6);
 436         set_light(2, lpos[2], Vec3(0.8, 1.0, 0.8) * 0.3);
 437
 438         rend->draw();
 439         exman->draw();
 440
 441         /*
 442         if(have_handtracking) {
 443                 Mat4 head_xform = inverse(mouse_view_matrix);//goatvr_head_matrix();
 444                 Mat4 head_dir_xform = head_xform.upper3x3();
 445
 446                 glUseProgram(0);
 447                 glPushAttrib(GL_ENABLE_BIT);
 448                 glDisable(GL_LIGHTING);
 449                 glBegin(GL_LINES);
 450                 for(int i=0; i<2; i++) {
 451                         if(hand[i].valid) {
 452                                 glColor3f(i, 1 - i, i);
 453                         } else {
 454                                 glColor3f(0.5, 0.5, 0.5);
 455                         }
 456                         Vec3 v = head_xform * hand[i].pos;
 457                         Vec3 dir = head_dir_xform * rotate(Vec3(0, 0, -1), hand[i].rot) * 20.0f;
 458                         Vec3 up = head_dir_xform * rotate(Vec3(0, 1, 0), hand[i].rot) * 10.0f;
 459                         Vec3 right = head_dir_xform * rotate(Vec3(1, 0, 0), hand[i].rot) * 10.0f;
 460
 461                         glVertex3f(v.x, v.y, v.z);
 462                         glVertex3f(v.x + dir.x, v.y + dir.y, v.z + dir.z);
 463                         glVertex3f(v.x - right.x, v.y - right.y, v.z - right.z);
 464                         glVertex3f(v.x + right.x, v.y + right.y, v.z + right.z);
 465                         glVertex3f(v.x - up.x, v.y - up.y, v.z - up.z);
 466                         glVertex3f(v.x + up.x, v.y + up.y, v.z + up.z);
 467                 }
 468                 glEnd();
 469                 glPopAttrib();
 470         }
 471         */
 472
 473         if(show_walk_mesh && mscn->walk_mesh) {
 474                 glPushAttrib(GL_ENABLE_BIT);
 475                 glEnable(GL_BLEND);
 476                 glBlendFunc(GL_ONE, GL_ONE);
 477                 glDisable(GL_LIGHTING);
 478                 glEnable(GL_POLYGON_OFFSET_FILL);
 479
 480                 glUseProgram(0);
 481
 482                 glPolygonOffset(-1, 1);
 483                 glDepthMask(0);
 484
 485                 glColor3f(0.3, 0.08, 0.01);
 486                 mscn->walk_mesh->draw();
 487
 488                 glDepthMask(1);
 489
 490                 glPopAttrib();
 491         }
 492
 493         print_text(Vec2(9 * win_width / 10, 20), Vec3(1, 1, 0), "fps: %.1f", framerate);
 494         draw_ui();
 495 }
 496
 497
 498 void app_reshape(int x, int y)
 499 {
 500         glViewport(0, 0, x, y);
 501         goatvr_set_fb_size(x, y, 1.0f);
 502         debug_gui_reshape(x, y);
 503 }
 504
 505 void app_keyboard(int key, bool pressed)
 506 {
 507         unsigned int mod = app_get_modifiers();
 508
 509         if(debug_gui && !(pressed && (key == '`' || key == 27))) {
 510                 debug_gui_key(key, pressed, mod);
 511                 return; // ignore all keystrokes when GUI is visible
 512         }
 513
 514         if(pressed) {
 515                 switch(key) {
 516                 case 27:
 517                         app_quit();
 518                         break;
 519
 520                 case '\n':
 521                 case '\r':
 522                         if(mod & MOD_ALT) {
 523                                 app_toggle_fullscreen();
 524                         }
 525                         break;
 526
 527                 case '`':
 528                         debug_gui = !debug_gui;
 529                         show_message("debug gui %s", debug_gui ? "enabled" : "disabled");
 530                         break;
 531
 532                 case 'm':
 533                         app_toggle_grab_mouse();
 534                         show_message("mouse %s", app_is_mouse_grabbed() ? "grabbed" : "released");
 535                         break;
 536
 537                 case 'w':
 538                         if(mod & MOD_CTRL) {
 539                                 show_walk_mesh = !show_walk_mesh;
 540                                 show_message("walk mesh: %s", show_walk_mesh ? "on" : "off");
 541                         }
 542                         break;
 543
 544                 case 'c':
 545                         if(mod & MOD_CTRL) {
 546                                 noclip = !noclip;
 547                                 show_message(noclip ? "no clip" : "clip");
 548                         }
 549                         break;
 550
 551                 case 'f':
 552                         toggle_flight();
 553                         break;
 554
 555                 case 'p':
 556                         if(mod & MOD_CTRL) {
 557                                 fb_srgb = !fb_srgb;
 558                                 show_message("gamma correction for non-sRGB framebuffers: %s\n", fb_srgb ? "off" : "on");
 559                         }
 560                         break;
 561
 562                 case '=':
 563                         walk_speed *= 1.25;
 564                         show_message("walk speed: %g", walk_speed);
 565                         break;
 566
 567                 case '-':
 568                         walk_speed *= 0.75;
 569                         show_message("walk speed: %g", walk_speed);
 570                         break;
 571
 572                 case ']':
 573                         mouse_speed *= 1.2;
 574                         show_message("mouse speed: %g", mouse_speed);
 575                         break;
 576
 577                 case '[':
 578                         mouse_speed *= 0.8;
 579                         show_message("mouse speed: %g", mouse_speed);
 580                         break;
 581
 582                 case 'b':
 583                         show_blobs = !show_blobs;
 584                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 585                         break;
 586
 587                 case ' ':
 588                         goatvr_recenter();
 589                         show_message("VR recenter\n");
 590                         break;
 591
 592                 case 'x':
 593                         exman->load(mscn, "data/exhibits");
 594                         break;
 595                 }
 596         }
 597
 598         if(key < 256 && !(mod & (MOD_CTRL | MOD_ALT))) {
 599                 keystate[key] = pressed;
 600         }
 601 }
 602
 603 void app_mouse_button(int bn, bool pressed, int x, int y)
 604 {
 605         if(debug_gui) {
 606                 debug_gui_mbutton(bn, pressed, x, y);
 607                 return; // ignore mouse events while GUI is visible
 608         }
 609
 610         prev_mx = x;
 611         prev_my = y;
 612         bnstate[bn] = pressed;
 613
 614         if(bn == 0) {
 615                 if(!pressed) {
 616                         if(ex_sel.ex) {
 617                                 ex_sel.ex = 0;
 618                         } else {
 619                                 Ray ray = calc_pick_ray(x, y, view_matrix, proj_matrix);
 620                                 ex_sel = exman->select(ray);
 621                         }
 622                 }
 623         }
 624 }
 625
 626 static inline void mouse_look(float dx, float dy)
 627 {
 628         float scrsz = (float)win_height;
 629         avatar.body_rot += dx * 512.0 / scrsz;
 630         avatar.head_alt += dy * 512.0 / scrsz;
 631
 632         if(avatar.head_alt < -90) avatar.head_alt = -90;
 633         if(avatar.head_alt > 90) avatar.head_alt = 90;
 634 }
 635
 636 static void mouse_zoom(float dx, float dy)
 637 {
 638         cam_dist += dy * 0.1;
 639         if(cam_dist < 0.0) cam_dist = 0.0;
 640 }
 641
 642 void app_mouse_motion(int x, int y)
 643 {
 644         if(debug_gui) {
 645                 debug_gui_mmotion(x, y);
 646                 return; // ignore mouse events while GUI is visible
 647         }
 648
 649         int dx = x - prev_mx;
 650         int dy = y - prev_my;
 651         prev_mx = x;
 652         prev_my = y;
 653
 654         if(!dx && !dy) return;
 655
 656         if(ex_sel.ex) {
 657                 Vec3 pos = ex_sel.ex->node->get_node_position();
 658                 Vec3 dir = transpose(view_matrix.upper3x3()) * Vec3(dx * 1.0, dy * -1.0, 0);
 659
 660                 ex_sel.ex->node->set_position(pos + dir);
 661         }
 662
 663         if(bnstate[2]) {
 664                 mouse_look(dx, dy);
 665         }
 666 }
 667
 668 void app_mouse_delta(int dx, int dy)
 669 {
 670         if(bnstate[2]) {
 671                 mouse_zoom(dx * mouse_speed, dy * mouse_speed);
 672         } else {
 673                 mouse_look(dx * mouse_speed, dy * mouse_speed);
 674         }
 675 }
 676
 677 void app_mouse_wheel(int dir)
 678 {
 679         if(debug_gui) {
 680                 debug_gui_wheel(dir);
 681         }
 682 }
 683
 684 void app_gamepad_axis(int axis, float val)
 685 {
 686         switch(axis) {
 687         case 0:
 688                 joy_move.x = val;
 689                 break;
 690         case 1:
 691                 joy_move.y = val;
 692                 break;
 693
 694         case 2:
 695                 joy_look.x = val;
 696                 break;
 697         case 3:
 698                 joy_look.y = val;
 699                 break;
 700         }
 701 }
 702
 703 void app_gamepad_button(int bn, bool pressed)
 704 {
 705         gpad_bnstate[bn] = pressed;
 706
 707         if(pressed) {
 708                 switch(bn) {
 709                 case GPAD_LSTICK:
 710                         toggle_flight();
 711                         break;
 712
 713                 case GPAD_X:
 714                         show_blobs = !show_blobs;
 715                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 716                         break;
 717
 718                 case GPAD_START:
 719                         goatvr_recenter();
 720                         show_message("VR recenter\n");
 721                         break;
 722
 723                 default:
 724                         break;
 725                 }
 726         }
 727 }
 728
 729 static void toggle_flight()
 730 {
 731         static float prev_walk_speed = -1.0;
 732         if(prev_walk_speed < 0.0) {
 733                 noclip = true;
 734                 prev_walk_speed = walk_speed;
 735                 walk_speed = 1000.0;
 736                 show_message("fly mode\n");
 737         } else {
 738                 noclip = false;
 739                 walk_speed = prev_walk_speed;
 740                 prev_walk_speed = -1.0;
 741                 show_message("walk mode\n");
 742         }
 743 }
 744
 745 static void calc_framerate()
 746 {
 747         static int ncalc;
 748         static int nframes;
 749         static long prev_upd;
 750
 751         long elapsed = time_msec - prev_upd;
 752         if(elapsed >= 1000) {
 753                 framerate = (float)nframes / (float)(elapsed * 0.001);
 754                 nframes = 1;
 755                 prev_upd = time_msec;
 756
 757                 /*if(++ncalc >= 5) {
 758                         printf("fps: %f\n", framerate);
 759                         ncalc = 0;
 760                 }*/
 761         } else {
 762                 ++nframes;
 763         }
 764 }
 765
 766 static Ray calc_pick_ray(int x, int y, const Mat4 &view_mat, const Mat4 &proj_mat)
 767 {
 768         return Ray();   // TODO
 769 }