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);
  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 int fpexcept_enabled;
  43
  44 static Avatar avatar;
  45
  46 static float cam_dist = 0.0;
  47 static float floor_y;   // last floor height
  48 static float user_eye_height = 165;
  49
  50 static float walk_speed = 300.0f;
  51 static float mouse_speed = 0.5f;
  52 static bool show_walk_mesh, noclip = false;
  53
  54 static bool have_headtracking, have_handtracking, should_swap;
  55
  56 static int prev_mx, prev_my;
  57 static bool bnstate[8];
  58 static bool keystate[256];
  59 static bool gpad_bnstate[64];
  60 static Vec2 joy_move, joy_look;
  61 static float joy_deadzone = 0.01;
  62
  63 static float framerate;
  64
  65 static Mat4 view_matrix, mouse_view_matrix, proj_matrix;
  66 static MetaScene *mscn;
  67 static unsigned int sdr_post_gamma;
  68
  69 static long prev_msec;
  70
  71 static ExhibitManager *exman;
  72 static BlobExhibit *blobs;
  73 static bool show_blobs;
  74
  75 ExSelection exsel_grab, exsel_hover;
  76
  77 static Renderer *rend;
  78
  79 static Ray last_pick_ray;
  80
  81
  82 bool app_init(int argc, char **argv)
  83 {
  84         set_log_file("demo.log");
  85
  86         char *env = getenv("FPEXCEPT");
  87         if(env && atoi(env)) {
  88                 info_log("enabling floating point exceptions\n");
  89                 fpexcept_enabled = 1;
  90                 enable_fpexcept();
  91         }
  92
  93         if(init_opengl() == -1) {
  94                 return false;
  95         }
  96
  97         if(!init_options(argc, argv, "demo.conf")) {
  98                 return false;
  99         }
 100         app_resize(opt.width, opt.height);
 101         app_fullscreen(opt.fullscreen);
 102
 103         if(opt.vr) {
 104                 if(goatvr_init() == -1) {
 105                         return false;
 106                 }
 107                 goatvr_set_origin_mode(GOATVR_HEAD);
 108                 goatvr_set_units_scale(100.0f);
 109
 110                 goatvr_startvr();
 111                 should_swap = goatvr_should_swap() != 0;
 112                 user_eye_height = goatvr_get_eye_height();
 113                 have_headtracking = goatvr_have_headtracking();
 114                 have_handtracking = goatvr_have_handtracking();
 115
 116                 goatvr_recenter();
 117         }
 118
 119         if(fb_srgb) {
 120                 int srgb_capable;
 121                 glGetIntegerv(GL_FRAMEBUFFER_SRGB_CAPABLE_EXT, &srgb_capable);
 122                 printf("Framebuffer %s sRGB-capable\n", srgb_capable ? "is" : "is not");
 123                 if(srgb_capable) {
 124                         glEnable(GL_FRAMEBUFFER_SRGB);
 125                 } else {
 126                         fb_srgb = 0;
 127                 }
 128         }
 129
 130         glEnable(GL_MULTISAMPLE);
 131         glEnable(GL_DEPTH_TEST);
 132         glEnable(GL_CULL_FACE);
 133         glEnable(GL_NORMALIZE);
 134
 135         if(!init_debug_gui()) {
 136                 return false;
 137         }
 138
 139         Mesh::use_custom_sdr_attr = false;
 140
 141         float ambient[] = {0.0, 0.0, 0.0, 0.0};
 142         glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);
 143
 144         glClearColor(1, 1, 1, 1);
 145
 146         init_audio();
 147
 148         if(!init_vrhands()) {
 149                 return false;
 150         }
 151
 152         mscn = new MetaScene;
 153         if(!mscn->load(opt.scenefile ? opt.scenefile : "data/museum.scene")) {
 154                 return false;
 155         }
 156
 157         avatar.pos = mscn->start_pos;
 158         Vec3 dir = rotate(Vec3(0, 0, 1), mscn->start_rot);
 159         dir.y = 0;
 160         avatar.body_rot = rad_to_deg(acos(dot(dir, Vec3(0, 0, 1))));
 161
 162         exman = new ExhibitManager;
 163         /*
 164         if(!exman->load(mscn, "data/exhibits")) {
 165                 //return false;
 166         }
 167         */
 168
 169         blobs = new BlobExhibit;
 170         blobs->node = new SceneNode;
 171         blobs->init();
 172         blobs->node->set_position(Vec3(-680, 160, -100));
 173         blobs->node->set_scaling(Vec3(28, 28, 28));
 174         blobs->node->update(0);
 175
 176         exman->add(blobs);
 177
 178         if(!(sdr_ltmap_notex = create_program_load("sdr/lightmap.v.glsl", "sdr/lightmap-notex.p.glsl"))) {
 179                 return false;
 180         }
 181         set_uniform_int(sdr_ltmap_notex, "texmap", MTL_TEX_DIFFUSE);
 182         set_uniform_int(sdr_ltmap_notex, "lightmap", MTL_TEX_LIGHTMAP);
 183
 184         if(!(sdr_ltmap = create_program_load("sdr/lightmap.v.glsl", "sdr/lightmap-tex.p.glsl"))) {
 185                 return false;
 186         }
 187         set_uniform_int(sdr_ltmap, "texmap", MTL_TEX_DIFFUSE);
 188         set_uniform_int(sdr_ltmap, "lightmap", MTL_TEX_LIGHTMAP);
 189
 190         if(!fb_srgb) {
 191                 sdr_post_gamma = create_program_load("sdr/post_gamma.v.glsl", "sdr/post_gamma.p.glsl");
 192         }
 193
 194         rend = new Renderer;
 195         rend->set_scene(mscn);
 196
 197         glUseProgram(0);
 198
 199         if(opt.vr || opt.fullscreen) {
 200                 app_grab_mouse(true);
 201         }
 202
 203         if(mscn->music && opt.music) {
 204                 mscn->music->play(AUDIO_PLAYMODE_LOOP);
 205         }
 206         return true;
 207 }
 208
 209 void app_cleanup()
 210 {
 211         if(mscn->music) {
 212                 mscn->music->stop();
 213         }
 214         destroy_audio();
 215
 216         app_grab_mouse(false);
 217         if(opt.vr) {
 218                 goatvr_shutdown();
 219         }
 220         destroy_vrhands();
 221
 222         delete rend;
 223
 224         delete exman;
 225
 226         texman.clear();
 227         sceneman.clear();
 228
 229         cleanup_debug_gui();
 230 }
 231
 232 static bool constrain_walk_mesh(const Vec3 &v, Vec3 *newv)
 233 {
 234         Mesh *wm = mscn->walk_mesh;
 235         if(!wm) {
 236                 *newv = v;
 237                 return true;
 238         }
 239
 240         Ray downray = Ray(v, Vec3(0, -1, 0));
 241         HitPoint hit;
 242         if(mscn->walk_mesh->intersect(downray, &hit)) {
 243                 *newv = hit.pos;
 244                 newv->y += user_eye_height;
 245                 return true;
 246         }
 247         return false;
 248 }
 249
 250 static void update(float dt)
 251 {
 252         texman.update();
 253         sceneman.update();
 254
 255         mscn->update(dt);
 256         exman->update(dt);
 257
 258         float speed = walk_speed * dt;
 259         Vec3 dir;
 260
 261         // joystick
 262         float jdeadsq = joy_deadzone * joy_deadzone;
 263         float jmove_lensq = length_sq(joy_move);
 264         float jlook_lensq = length_sq(joy_look);
 265
 266         if(jmove_lensq > jdeadsq) {
 267                 float len = sqrt(jmove_lensq);
 268                 jmove_lensq -= jdeadsq;
 269
 270                 float mag = len * len;
 271                 dir.x += mag * joy_move.x / len * 2.0 * speed;
 272                 dir.z += mag * joy_move.y / len * 2.0 * speed;
 273         }
 274         if(jlook_lensq > jdeadsq) {
 275                 float len = sqrt(jlook_lensq);
 276                 jlook_lensq -= jdeadsq;
 277
 278                 float mag = len * len;
 279                 avatar.body_rot += mag * joy_look.x / len * 200.0 * dt;
 280                 avatar.head_alt += mag * joy_look.y / len * 100.0 * dt;
 281                 if(avatar.head_alt < -90.0f) avatar.head_alt = -90.0f;
 282                 if(avatar.head_alt > 90.0f) avatar.head_alt = 90.0f;
 283         }
 284
 285         // keyboard move
 286         if(keystate[(int)'w']) {
 287                 dir.z -= speed;
 288         }
 289         if(keystate[(int)'s']) {
 290                 dir.z += speed;
 291         }
 292         if(keystate[(int)'d']) {
 293                 dir.x += speed;
 294         }
 295         if(keystate[(int)'a']) {
 296                 dir.x -= speed;
 297         }
 298         if(keystate[(int)'q'] || gpad_bnstate[GPAD_UP]) {
 299                 avatar.pos.y += speed;
 300         }
 301         if(keystate[(int)'z'] || gpad_bnstate[GPAD_DOWN]) {
 302                 avatar.pos.y -= speed;
 303         }
 304
 305         float theta = M_PI * avatar.body_rot / 180.0f;
 306         Vec3 newpos;
 307         newpos.x = avatar.pos.x + cos(theta) * dir.x - sin(theta) * dir.z;
 308         newpos.y = avatar.pos.y;
 309         newpos.z = avatar.pos.z + sin(theta) * dir.x + cos(theta) * dir.z;
 310
 311         if(noclip) {
 312                 avatar.pos = newpos;
 313         } else {
 314                 if(!constrain_walk_mesh(newpos, &avatar.pos)) {
 315                         float dtheta = M_PI / 32.0;
 316                         float theta = dtheta;
 317                         Vec2 dir2d = newpos.xz() - avatar.pos.xz();
 318
 319                         for(int i=0; i<16; i++) {
 320                                 Vec2 dvec = rotate(dir2d, theta);
 321                                 Vec3 pos = avatar.pos + Vec3(dvec.x, 0, dvec.y);
 322                                 if(constrain_walk_mesh(pos, &avatar.pos)) {
 323                                         break;
 324                                 }
 325                                 dvec = rotate(dir2d, -theta);
 326                                 pos = avatar.pos + Vec3(dvec.x, 0, dvec.y);
 327                                 if(constrain_walk_mesh(pos, &avatar.pos)) {
 328                                         break;
 329                                 }
 330                                 theta += dtheta;
 331                         }
 332                 }
 333                 floor_y = avatar.pos.y - user_eye_height;
 334         }
 335
 336         // TODO move to avatar
 337         // calculate mouselook view matrix
 338         mouse_view_matrix = Mat4::identity;
 339         mouse_view_matrix.pre_translate(0, 0, -cam_dist);
 340         if(!have_headtracking) {
 341                 mouse_view_matrix.pre_rotate_x(deg_to_rad(avatar.head_alt));
 342         }
 343         mouse_view_matrix.pre_rotate_y(deg_to_rad(avatar.body_rot));
 344         mouse_view_matrix.pre_translate(-avatar.pos.x, -avatar.pos.y, -avatar.pos.z);
 345
 346         // check if an exhibit is hovered-over by mouse or 6dof
 347         // XXX note: using previous view/proj matrix lattency shouldn't be an issue but
 348         //           make sure state-creep doesn't get us
 349         // XXX also this mouse-picking probably should only be active in non-VR mode
 350         Ray ray = calc_pick_ray(prev_mx, prev_my);
 351         exsel_hover = exman->select(ray);
 352
 353         // update hand-tracking
 354         if(have_handtracking) {
 355                 update_vrhands(&avatar);
 356         }
 357 }
 358
 359 void app_display()
 360 {
 361         float dt = (float)(time_msec - prev_msec) / 1000.0f;
 362         prev_msec = time_msec;
 363
 364         if(debug_gui) {
 365                 ImGui::GetIOPtr()->DeltaTime = dt;
 366                 ImGui::NewFrame();
 367
 368                 ImGui::ShowTestWindow();
 369         }
 370
 371         if(opt.vr) {
 372                 // VR mode
 373                 goatvr_draw_start();
 374                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 375
 376                 update(dt);
 377
 378                 for(int i=0; i<2; i++) {
 379                         // for each eye
 380                         goatvr_draw_eye(i);
 381
 382                         proj_matrix = goatvr_projection_matrix(i, NEAR_CLIP, FAR_CLIP);
 383                         glMatrixMode(GL_PROJECTION);
 384                         glLoadMatrixf(proj_matrix[0]);
 385
 386                         view_matrix = mouse_view_matrix * Mat4(goatvr_view_matrix(i));
 387                         glMatrixMode(GL_MODELVIEW);
 388                         glLoadMatrixf(view_matrix[0]);
 389
 390                         draw_scene();
 391                         if(have_handtracking) {
 392                                 draw_vrhands();
 393                         }
 394
 395                         if(debug_gui) {
 396                                 ImGui::Render();
 397                         }
 398                 }
 399                 goatvr_draw_done();
 400
 401                 if(should_swap) {
 402                         app_swap_buffers();
 403                 }
 404
 405         } else {
 406                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 407
 408                 update(dt);
 409
 410                 proj_matrix.perspective(deg_to_rad(50.0), win_aspect, NEAR_CLIP, FAR_CLIP);
 411                 glMatrixMode(GL_PROJECTION);
 412                 glLoadMatrixf(proj_matrix[0]);
 413
 414                 view_matrix = mouse_view_matrix;
 415                 glMatrixMode(GL_MODELVIEW);
 416                 glLoadMatrixf(view_matrix[0]);
 417
 418                 draw_scene();
 419
 420                 if(!fb_srgb && sdr_post_gamma) {
 421                         slow_post(sdr_post_gamma);
 422                         glUseProgram(0);
 423                 }
 424
 425                 if(debug_gui) {
 426                         ImGui::Render();
 427                 }
 428                 app_swap_buffers();
 429         }
 430         assert(glGetError() == GL_NO_ERROR);
 431
 432         calc_framerate();
 433 }
 434
 435
 436 static void draw_scene()
 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                 glEnable(GL_POLYGON_OFFSET_FILL);
 478
 479                 glUseProgram(0);
 480
 481                 glPolygonOffset(-1, 1);
 482                 glDepthMask(0);
 483
 484                 glColor3f(0.3, 0.08, 0.01);
 485                 mscn->walk_mesh->draw();
 486
 487                 glDepthMask(1);
 488
 489                 glPopAttrib();
 490         }
 491
 492         print_text(Vec2(9 * win_width / 10, 20), Vec3(1, 1, 0), "fps: %.1f", framerate);
 493         draw_ui();
 494 }
 495
 496
 497 void app_reshape(int x, int y)
 498 {
 499         glViewport(0, 0, x, y);
 500         goatvr_set_fb_size(x, y, 1.0f);
 501         debug_gui_reshape(x, y);
 502 }
 503
 504 void app_keyboard(int key, bool pressed)
 505 {
 506         unsigned int mod = app_get_modifiers();
 507
 508         if(debug_gui && !(pressed && (key == '`' || key == 27))) {
 509                 debug_gui_key(key, pressed, mod);
 510                 return; // ignore all keystrokes when GUI is visible
 511         }
 512
 513         if(pressed) {
 514                 switch(key) {
 515                 case 27:
 516                         app_quit();
 517                         break;
 518
 519                 case '\n':
 520                 case '\r':
 521                         if(mod & MOD_ALT) {
 522                                 app_toggle_fullscreen();
 523                         }
 524                         break;
 525
 526                 case '`':
 527                         debug_gui = !debug_gui;
 528                         show_message("debug gui %s", debug_gui ? "enabled" : "disabled");
 529                         break;
 530
 531                 case 'm':
 532                         app_toggle_grab_mouse();
 533                         show_message("mouse %s", app_is_mouse_grabbed() ? "grabbed" : "released");
 534                         break;
 535
 536                 case 'w':
 537                         if(mod & MOD_CTRL) {
 538                                 show_walk_mesh = !show_walk_mesh;
 539                                 show_message("walk mesh: %s", show_walk_mesh ? "on" : "off");
 540                         }
 541                         break;
 542
 543                 case 'c':
 544                         if(mod & MOD_CTRL) {
 545                                 noclip = !noclip;
 546                                 show_message(noclip ? "no clip" : "clip");
 547                         }
 548                         break;
 549
 550                 case 'f':
 551                         toggle_flight();
 552                         break;
 553
 554                 case 'p':
 555                         if(mod & MOD_CTRL) {
 556                                 fb_srgb = !fb_srgb;
 557                                 show_message("gamma correction for non-sRGB framebuffers: %s\n", fb_srgb ? "off" : "on");
 558                         }
 559                         break;
 560
 561                 case '=':
 562                         walk_speed *= 1.25;
 563                         show_message("walk speed: %g", walk_speed);
 564                         break;
 565
 566                 case '-':
 567                         walk_speed *= 0.75;
 568                         show_message("walk speed: %g", walk_speed);
 569                         break;
 570
 571                 case ']':
 572                         mouse_speed *= 1.2;
 573                         show_message("mouse speed: %g", mouse_speed);
 574                         break;
 575
 576                 case '[':
 577                         mouse_speed *= 0.8;
 578                         show_message("mouse speed: %g", mouse_speed);
 579                         break;
 580
 581                 case 'b':
 582                         show_blobs = !show_blobs;
 583                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 584                         break;
 585
 586                 case ' ':
 587                         goatvr_recenter();
 588                         show_message("VR recenter\n");
 589                         break;
 590
 591                 case 'x':
 592                         exman->load(mscn, "data/exhibits");
 593                         break;
 594                 }
 595         }
 596
 597         if(key < 256 && !(mod & (MOD_CTRL | MOD_ALT))) {
 598                 keystate[key] = pressed;
 599         }
 600 }
 601
 602 void app_mouse_button(int bn, bool pressed, int x, int y)
 603 {
 604         if(debug_gui) {
 605                 debug_gui_mbutton(bn, pressed, x, y);
 606                 return; // ignore mouse events while GUI is visible
 607         }
 608
 609         prev_mx = x;
 610         prev_my = y;
 611         bnstate[bn] = pressed;
 612
 613         if(bn == 0) {
 614                 if(!pressed) {
 615                         if(exsel_grab.ex) {
 616                                 exsel_grab.ex = 0;
 617                         } else {
 618                                 Ray ray = calc_pick_ray(x, y);
 619                                 exsel_grab = exman->select(ray);
 620                         }
 621                 }
 622         }
 623 }
 624
 625 static inline void mouse_look(float dx, float dy)
 626 {
 627         float scrsz = (float)win_height;
 628         avatar.body_rot += dx * 512.0 / scrsz;
 629         avatar.head_alt += dy * 512.0 / scrsz;
 630
 631         if(avatar.head_alt < -90) avatar.head_alt = -90;
 632         if(avatar.head_alt > 90) avatar.head_alt = 90;
 633 }
 634
 635 static void mouse_zoom(float dx, float dy)
 636 {
 637         cam_dist += dy * 0.1;
 638         if(cam_dist < 0.0) cam_dist = 0.0;
 639 }
 640
 641 void app_mouse_motion(int x, int y)
 642 {
 643         if(debug_gui) {
 644                 debug_gui_mmotion(x, y);
 645                 return; // ignore mouse events while GUI is visible
 646         }
 647
 648         int dx = x - prev_mx;
 649         int dy = y - prev_my;
 650         prev_mx = x;
 651         prev_my = y;
 652
 653         if(!dx && !dy) return;
 654
 655         if(exsel_grab.ex) {
 656                 Vec3 pos = exsel_grab.ex->node->get_node_position();
 657                 Vec3 dir = transpose(view_matrix.upper3x3()) * Vec3(dx * 1.0, dy * -1.0, 0);
 658
 659                 exsel_grab.ex->node->set_position(pos + dir);
 660         }
 661
 662         if(bnstate[2]) {
 663                 mouse_look(dx, dy);
 664         }
 665 }
 666
 667 void app_mouse_delta(int dx, int dy)
 668 {
 669         if(bnstate[2]) {
 670                 mouse_zoom(dx * mouse_speed, dy * mouse_speed);
 671         } else {
 672                 mouse_look(dx * mouse_speed, dy * mouse_speed);
 673         }
 674 }
 675
 676 void app_mouse_wheel(int dir)
 677 {
 678         if(debug_gui) {
 679                 debug_gui_wheel(dir);
 680         }
 681 }
 682
 683 void app_gamepad_axis(int axis, float val)
 684 {
 685         switch(axis) {
 686         case 0:
 687                 joy_move.x = val;
 688                 break;
 689         case 1:
 690                 joy_move.y = val;
 691                 break;
 692
 693         case 2:
 694                 joy_look.x = val;
 695                 break;
 696         case 3:
 697                 joy_look.y = val;
 698                 break;
 699         }
 700 }
 701
 702 void app_gamepad_button(int bn, bool pressed)
 703 {
 704         gpad_bnstate[bn] = pressed;
 705
 706         if(pressed) {
 707                 switch(bn) {
 708                 case GPAD_LSTICK:
 709                         toggle_flight();
 710                         break;
 711
 712                 case GPAD_X:
 713                         show_blobs = !show_blobs;
 714                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 715                         break;
 716
 717                 case GPAD_START:
 718                         goatvr_recenter();
 719                         show_message("VR recenter\n");
 720                         break;
 721
 722                 default:
 723                         break;
 724                 }
 725         }
 726 }
 727
 728 static void toggle_flight()
 729 {
 730         static float prev_walk_speed = -1.0;
 731         if(prev_walk_speed < 0.0) {
 732                 noclip = true;
 733                 prev_walk_speed = walk_speed;
 734                 walk_speed = 1000.0;
 735                 show_message("fly mode\n");
 736         } else {
 737                 noclip = false;
 738                 walk_speed = prev_walk_speed;
 739                 prev_walk_speed = -1.0;
 740                 show_message("walk mode\n");
 741         }
 742 }
 743
 744 static void calc_framerate()
 745 {
 746         //static int ncalc;
 747         static int nframes;
 748         static long prev_upd;
 749
 750         long elapsed = time_msec - prev_upd;
 751         if(elapsed >= 1000) {
 752                 framerate = (float)nframes / (float)(elapsed * 0.001);
 753                 nframes = 1;
 754                 prev_upd = time_msec;
 755
 756                 /*if(++ncalc >= 5) {
 757                         printf("fps: %f\n", framerate);
 758                         ncalc = 0;
 759                 }*/
 760         } else {
 761                 ++nframes;
 762         }
 763 }
 764
 765 static Ray calc_pick_ray(int x, int y)
 766 {
 767         float nx = (float)x / (float)win_width;
 768         float ny = (float)(win_height - y) / (float)win_height;
 769
 770         last_pick_ray = mouse_pick_ray(nx, ny, view_matrix, proj_matrix);
 771         return last_pick_ray;
 772 }