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