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
  24 #define NEAR_CLIP       5.0
  25 #define FAR_CLIP        10000.0
  26
  27 static void draw_scene();
  28 static void toggle_flight();
  29 static void calc_framerate();
  30 static Ray calc_pick_ray(int x, int y);
  31
  32 long time_msec;
  33 int win_width, win_height;
  34 float win_aspect;
  35 bool fb_srgb;
  36 bool opt_gear_wireframe;
  37
  38 TextureSet texman;
  39 SceneSet sceneman;
  40
  41 unsigned int sdr_ltmap, sdr_ltmap_notex;
  42
  43 int fpexcept_enabled;
  44
  45 static Avatar avatar;
  46
  47 static float cam_dist = 0.0;
  48 static float floor_y;   // last floor height
  49 static float user_eye_height = 165;
  50
  51 static float walk_speed = 300.0f;
  52 static float mouse_speed = 0.5f;
  53 static bool show_walk_mesh, noclip = false;
  54
  55 static bool have_headtracking, have_handtracking, should_swap;
  56
  57 static int prev_mx, prev_my;
  58 static bool bnstate[8];
  59 static bool keystate[256];
  60 static bool gpad_bnstate[64];
  61 static Vec2 joy_move, joy_look;
  62 static float joy_deadzone = 0.01;
  63
  64 static float framerate;
  65
  66 static Mat4 view_matrix, mouse_view_matrix, proj_matrix;
  67 static MetaScene *mscn;
  68 static unsigned int sdr_post_gamma;
  69
  70 static long prev_msec;
  71
  72 static ExhibitManager *exman;
  73 static BlobExhibit *blobs;
  74 static bool show_blobs;
  75
  76 ExSelection exsel_active, exsel_hover;
  77 ExSelection exsel_grab_left, exsel_grab_right;
  78 #define exsel_grab_mouse exsel_grab_right
  79 static ExhibitSlot exslot_left, exslot_right;
  80 #define exslot_mouse exslot_right
  81
  82 static Renderer *rend;
  83
  84 static Ray last_pick_ray;
  85
  86
  87 bool app_init(int argc, char **argv)
  88 {
  89         set_log_file("demo.log");
  90
  91         char *env = getenv("FPEXCEPT");
  92         if(env && atoi(env)) {
  93                 info_log("enabling floating point exceptions\n");
  94                 fpexcept_enabled = 1;
  95                 enable_fpexcept();
  96         }
  97
  98         if(init_opengl() == -1) {
  99                 return false;
 100         }
 101
 102         if(!init_options(argc, argv, "demo.conf")) {
 103                 return false;
 104         }
 105         app_resize(opt.width, opt.height);
 106         app_fullscreen(opt.fullscreen);
 107
 108         if(opt.vr) {
 109                 if(goatvr_init() == -1) {
 110                         return false;
 111                 }
 112                 goatvr_set_origin_mode(GOATVR_HEAD);
 113                 goatvr_set_units_scale(100.0f);
 114
 115                 goatvr_startvr();
 116                 should_swap = goatvr_should_swap() != 0;
 117                 user_eye_height = goatvr_get_eye_height();
 118                 have_headtracking = goatvr_have_headtracking();
 119                 have_handtracking = goatvr_have_handtracking();
 120
 121                 goatvr_recenter();
 122         }
 123
 124         if(fb_srgb) {
 125                 int srgb_capable;
 126                 glGetIntegerv(GL_FRAMEBUFFER_SRGB_CAPABLE_EXT, &srgb_capable);
 127                 printf("Framebuffer %s sRGB-capable\n", srgb_capable ? "is" : "is not");
 128                 if(srgb_capable) {
 129                         glEnable(GL_FRAMEBUFFER_SRGB);
 130                 } else {
 131                         fb_srgb = 0;
 132                 }
 133         }
 134
 135         glEnable(GL_MULTISAMPLE);
 136         glEnable(GL_DEPTH_TEST);
 137         glEnable(GL_CULL_FACE);
 138         glEnable(GL_NORMALIZE);
 139
 140         if(!init_debug_gui()) {
 141                 return false;
 142         }
 143
 144         Mesh::use_custom_sdr_attr = false;
 145
 146         float ambient[] = {0.0, 0.0, 0.0, 0.0};
 147         glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);
 148
 149         glClearColor(1, 1, 1, 1);
 150
 151         init_audio();
 152
 153         if(!init_vrhands()) {
 154                 return false;
 155         }
 156
 157         mscn = new MetaScene;
 158         if(!mscn->load(opt.scenefile ? opt.scenefile : "data/museum.scene")) {
 159                 return false;
 160         }
 161
 162         avatar.pos = mscn->start_pos;
 163         Vec3 dir = rotate(Vec3(0, 0, 1), mscn->start_rot);
 164         dir.y = 0;
 165         avatar.body_rot = rad_to_deg(acos(dot(dir, Vec3(0, 0, 1))));
 166
 167         exman = new ExhibitManager;
 168         /*
 169         if(!exman->load(mscn, "data/exhibits")) {
 170                 //return false;
 171         }
 172         */
 173
 174         blobs = new BlobExhibit;
 175         blobs->node = new SceneNode;
 176         blobs->init();
 177         blobs->node->set_position(Vec3(-680, 160, -100));
 178         blobs->node->set_scaling(Vec3(28, 28, 28));
 179         blobs->node->update(0);
 180
 181         exman->add(blobs);
 182
 183         if(!(sdr_ltmap_notex = create_program_load("sdr/lightmap.v.glsl", "sdr/lightmap-notex.p.glsl"))) {
 184                 return false;
 185         }
 186         set_uniform_int(sdr_ltmap_notex, "texmap", MTL_TEX_DIFFUSE);
 187         set_uniform_int(sdr_ltmap_notex, "lightmap", MTL_TEX_LIGHTMAP);
 188
 189         if(!(sdr_ltmap = create_program_load("sdr/lightmap.v.glsl", "sdr/lightmap-tex.p.glsl"))) {
 190                 return false;
 191         }
 192         set_uniform_int(sdr_ltmap, "texmap", MTL_TEX_DIFFUSE);
 193         set_uniform_int(sdr_ltmap, "lightmap", MTL_TEX_LIGHTMAP);
 194
 195         if(!fb_srgb) {
 196                 sdr_post_gamma = create_program_load("sdr/post_gamma.v.glsl", "sdr/post_gamma.p.glsl");
 197         }
 198
 199         rend = new Renderer;
 200         rend->set_scene(mscn);
 201
 202         glUseProgram(0);
 203
 204         if(opt.vr || opt.fullscreen) {
 205                 app_grab_mouse(true);
 206         }
 207
 208         if(mscn->music && opt.music) {
 209                 mscn->music->play(AUDIO_PLAYMODE_LOOP);
 210         }
 211         return true;
 212 }
 213
 214 void app_cleanup()
 215 {
 216         if(mscn->music) {
 217                 mscn->music->stop();
 218         }
 219         destroy_audio();
 220
 221         app_grab_mouse(false);
 222         if(opt.vr) {
 223                 goatvr_shutdown();
 224         }
 225         destroy_vrhands();
 226
 227         delete rend;
 228
 229         /* this must be destroyed before the scene graph to detach exhibit nodes
 230          * before the scene tries to delete them recursively
 231          */
 232         delete exman;
 233
 234         texman.clear();
 235         sceneman.clear();
 236
 237         cleanup_debug_gui();
 238 }
 239
 240 static bool constrain_walk_mesh(const Vec3 &v, Vec3 *newv)
 241 {
 242         Mesh *wm = mscn->walk_mesh;
 243         if(!wm) {
 244                 *newv = v;
 245                 return true;
 246         }
 247
 248         Ray downray = Ray(v, Vec3(0, -1, 0));
 249         HitPoint hit;
 250         if(mscn->walk_mesh->intersect(downray, &hit)) {
 251                 *newv = hit.pos;
 252                 newv->y += user_eye_height;
 253                 return true;
 254         }
 255         return false;
 256 }
 257
 258 static void update(float dt)
 259 {
 260         texman.update();
 261         sceneman.update();
 262
 263         mscn->update(dt);
 264         exman->update(dt);
 265
 266         float speed = walk_speed * dt;
 267         Vec3 dir;
 268
 269         // joystick
 270         float jdeadsq = joy_deadzone * joy_deadzone;
 271         float jmove_lensq = length_sq(joy_move);
 272         float jlook_lensq = length_sq(joy_look);
 273
 274         if(jmove_lensq > jdeadsq) {
 275                 float len = sqrt(jmove_lensq);
 276                 jmove_lensq -= jdeadsq;
 277
 278                 float mag = len * len;
 279                 dir.x += mag * joy_move.x / len * 2.0 * speed;
 280                 dir.z += mag * joy_move.y / len * 2.0 * speed;
 281         }
 282         if(jlook_lensq > jdeadsq) {
 283                 float len = sqrt(jlook_lensq);
 284                 jlook_lensq -= jdeadsq;
 285
 286                 float mag = len * len;
 287                 avatar.body_rot += mag * joy_look.x / len * 200.0 * dt;
 288                 avatar.head_alt += mag * joy_look.y / len * 100.0 * dt;
 289                 if(avatar.head_alt < -90.0f) avatar.head_alt = -90.0f;
 290                 if(avatar.head_alt > 90.0f) avatar.head_alt = 90.0f;
 291         }
 292
 293         // keyboard move
 294         if(keystate[(int)'w']) {
 295                 dir.z -= speed;
 296         }
 297         if(keystate[(int)'s']) {
 298                 dir.z += speed;
 299         }
 300         if(keystate[(int)'d']) {
 301                 dir.x += speed;
 302         }
 303         if(keystate[(int)'a']) {
 304                 dir.x -= speed;
 305         }
 306         if(keystate[(int)'q'] || gpad_bnstate[GPAD_UP]) {
 307                 avatar.pos.y += speed;
 308         }
 309         if(keystate[(int)'z'] || gpad_bnstate[GPAD_DOWN]) {
 310                 avatar.pos.y -= speed;
 311         }
 312
 313         float theta = M_PI * avatar.body_rot / 180.0f;
 314         Vec3 newpos;
 315         newpos.x = avatar.pos.x + cos(theta) * dir.x - sin(theta) * dir.z;
 316         newpos.y = avatar.pos.y;
 317         newpos.z = avatar.pos.z + sin(theta) * dir.x + cos(theta) * dir.z;
 318
 319         if(noclip) {
 320                 avatar.pos = newpos;
 321         } else {
 322                 if(!constrain_walk_mesh(newpos, &avatar.pos)) {
 323                         float dtheta = M_PI / 32.0;
 324                         float theta = dtheta;
 325                         Vec2 dir2d = newpos.xz() - avatar.pos.xz();
 326
 327                         for(int i=0; i<16; i++) {
 328                                 Vec2 dvec = rotate(dir2d, theta);
 329                                 Vec3 pos = avatar.pos + Vec3(dvec.x, 0, dvec.y);
 330                                 if(constrain_walk_mesh(pos, &avatar.pos)) {
 331                                         break;
 332                                 }
 333                                 dvec = rotate(dir2d, -theta);
 334                                 pos = avatar.pos + Vec3(dvec.x, 0, dvec.y);
 335                                 if(constrain_walk_mesh(pos, &avatar.pos)) {
 336                                         break;
 337                                 }
 338                                 theta += dtheta;
 339                         }
 340                 }
 341                 floor_y = avatar.pos.y - user_eye_height;
 342         }
 343
 344         // TODO move to the avatar system
 345         // calculate mouselook view matrix
 346         mouse_view_matrix = Mat4::identity;
 347         mouse_view_matrix.pre_translate(0, 0, -cam_dist);
 348         if(!have_headtracking) {
 349                 mouse_view_matrix.pre_rotate_x(deg_to_rad(avatar.head_alt));
 350         }
 351         mouse_view_matrix.pre_rotate_y(deg_to_rad(avatar.body_rot));
 352         mouse_view_matrix.pre_translate(-avatar.pos.x, -avatar.pos.y, -avatar.pos.z);
 353
 354         // check if an exhibit is hovered-over by mouse or 6dof (only if we don't have one grabbed)
 355         if(!exsel_grab_mouse) {
 356                 // XXX note: using previous view/proj matrix lattency shouldn't be an issue but
 357                 //           make sure state-creep doesn't get us
 358                 // XXX also this mouse-picking probably should only be active in non-VR mode
 359                 Ray ray = calc_pick_ray(prev_mx, prev_my);
 360                 exsel_hover = exman->select(ray);
 361         }
 362
 363         if(!exslot_left.empty()) exslot_left.node.update(dt);
 364         if(!exslot_right.empty()) exslot_right.node.update(dt);
 365
 366         // update hand-tracking
 367         if(have_handtracking) {
 368                 update_vrhands(&avatar);
 369         }
 370 }
 371
 372 void app_display()
 373 {
 374         float dt = (float)(time_msec - prev_msec) / 1000.0f;
 375         prev_msec = time_msec;
 376
 377         if(debug_gui) {
 378                 ImGui::GetIOPtr()->DeltaTime = dt;
 379                 ImGui::NewFrame();
 380
 381                 ImGui::ShowTestWindow();
 382         }
 383
 384         if(opt.vr) {
 385                 // VR mode
 386                 goatvr_draw_start();
 387                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 388
 389                 update(dt);
 390
 391                 for(int i=0; i<2; i++) {
 392                         // for each eye
 393                         goatvr_draw_eye(i);
 394
 395                         proj_matrix = goatvr_projection_matrix(i, NEAR_CLIP, FAR_CLIP);
 396                         glMatrixMode(GL_PROJECTION);
 397                         glLoadMatrixf(proj_matrix[0]);
 398
 399                         view_matrix = mouse_view_matrix * Mat4(goatvr_view_matrix(i));
 400                         glMatrixMode(GL_MODELVIEW);
 401                         glLoadMatrixf(view_matrix[0]);
 402
 403                         draw_scene();
 404                         if(have_handtracking) {
 405                                 draw_vrhands();
 406                         }
 407
 408                         if(debug_gui) {
 409                                 ImGui::Render();
 410                         }
 411                 }
 412                 goatvr_draw_done();
 413
 414                 if(should_swap) {
 415                         app_swap_buffers();
 416                 }
 417
 418         } else {
 419                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 420
 421                 update(dt);
 422
 423                 proj_matrix.perspective(deg_to_rad(50.0), win_aspect, NEAR_CLIP, FAR_CLIP);
 424                 glMatrixMode(GL_PROJECTION);
 425                 glLoadMatrixf(proj_matrix[0]);
 426
 427                 view_matrix = mouse_view_matrix;
 428                 glMatrixMode(GL_MODELVIEW);
 429                 glLoadMatrixf(view_matrix[0]);
 430
 431                 draw_scene();
 432
 433                 if(!fb_srgb && sdr_post_gamma) {
 434                         slow_post(sdr_post_gamma);
 435                         glUseProgram(0);
 436                 }
 437
 438                 if(debug_gui) {
 439                         ImGui::Render();
 440                 }
 441                 app_swap_buffers();
 442         }
 443         assert(glGetError() == GL_NO_ERROR);
 444
 445         calc_framerate();
 446 }
 447
 448
 449 static void draw_scene()
 450 {
 451         rend->draw();
 452         exman->draw();
 453
 454         /*
 455         if(have_handtracking) {
 456                 Mat4 head_xform = inverse(mouse_view_matrix);//goatvr_head_matrix();
 457                 Mat4 head_dir_xform = head_xform.upper3x3();
 458
 459                 glUseProgram(0);
 460                 glPushAttrib(GL_ENABLE_BIT);
 461                 glDisable(GL_LIGHTING);
 462                 glBegin(GL_LINES);
 463                 for(int i=0; i<2; i++) {
 464                         if(hand[i].valid) {
 465                                 glColor3f(i, 1 - i, i);
 466                         } else {
 467                                 glColor3f(0.5, 0.5, 0.5);
 468                         }
 469                         Vec3 v = head_xform * hand[i].pos;
 470                         Vec3 dir = head_dir_xform * rotate(Vec3(0, 0, -1), hand[i].rot) * 20.0f;
 471                         Vec3 up = head_dir_xform * rotate(Vec3(0, 1, 0), hand[i].rot) * 10.0f;
 472                         Vec3 right = head_dir_xform * rotate(Vec3(1, 0, 0), hand[i].rot) * 10.0f;
 473
 474                         glVertex3f(v.x, v.y, v.z);
 475                         glVertex3f(v.x + dir.x, v.y + dir.y, v.z + dir.z);
 476                         glVertex3f(v.x - right.x, v.y - right.y, v.z - right.z);
 477                         glVertex3f(v.x + right.x, v.y + right.y, v.z + right.z);
 478                         glVertex3f(v.x - up.x, v.y - up.y, v.z - up.z);
 479                         glVertex3f(v.x + up.x, v.y + up.y, v.z + up.z);
 480                 }
 481                 glEnd();
 482                 glPopAttrib();
 483         }
 484         */
 485
 486         if(show_walk_mesh && mscn->walk_mesh) {
 487                 glPushAttrib(GL_ENABLE_BIT);
 488                 glEnable(GL_BLEND);
 489                 glBlendFunc(GL_ONE, GL_ONE);
 490                 glEnable(GL_POLYGON_OFFSET_FILL);
 491
 492                 glUseProgram(0);
 493
 494                 glPolygonOffset(-1, 1);
 495                 glDepthMask(0);
 496
 497                 glColor3f(0.3, 0.08, 0.01);
 498                 mscn->walk_mesh->draw();
 499
 500                 glDepthMask(1);
 501
 502                 glPopAttrib();
 503         }
 504
 505         print_text(Vec2(9 * win_width / 10, 20), Vec3(1, 1, 0), "fps: %.1f", framerate);
 506         draw_ui();
 507 }
 508
 509
 510 void app_reshape(int x, int y)
 511 {
 512         glViewport(0, 0, x, y);
 513         goatvr_set_fb_size(x, y, 1.0f);
 514         debug_gui_reshape(x, y);
 515 }
 516
 517 void app_keyboard(int key, bool pressed)
 518 {
 519         unsigned int mod = app_get_modifiers();
 520
 521         if(debug_gui && !(pressed && (key == '`' || key == 27))) {
 522                 debug_gui_key(key, pressed, mod);
 523                 return; // ignore all keystrokes when GUI is visible
 524         }
 525
 526         if(pressed) {
 527                 switch(key) {
 528                 case 27:
 529                         app_quit();
 530                         break;
 531
 532                 case '\n':
 533                 case '\r':
 534                         if(mod & MOD_ALT) {
 535                                 app_toggle_fullscreen();
 536                         }
 537                         break;
 538
 539                 case '`':
 540                         debug_gui = !debug_gui;
 541                         show_message("debug gui %s", debug_gui ? "enabled" : "disabled");
 542                         break;
 543
 544                 case 'm':
 545                         app_toggle_grab_mouse();
 546                         show_message("mouse %s", app_is_mouse_grabbed() ? "grabbed" : "released");
 547                         break;
 548
 549                 case 'w':
 550                         if(mod & MOD_CTRL) {
 551                                 show_walk_mesh = !show_walk_mesh;
 552                                 show_message("walk mesh: %s", show_walk_mesh ? "on" : "off");
 553                         }
 554                         break;
 555
 556                 case 'c':
 557                         if(mod & MOD_CTRL) {
 558                                 noclip = !noclip;
 559                                 show_message(noclip ? "no clip" : "clip");
 560                         }
 561                         break;
 562
 563                 case 'f':
 564                         toggle_flight();
 565                         break;
 566
 567                 case 'p':
 568                         if(mod & MOD_CTRL) {
 569                                 fb_srgb = !fb_srgb;
 570                                 show_message("gamma correction for non-sRGB framebuffers: %s\n", fb_srgb ? "off" : "on");
 571                         }
 572                         break;
 573
 574                 case '=':
 575                         walk_speed *= 1.25;
 576                         show_message("walk speed: %g", walk_speed);
 577                         break;
 578
 579                 case '-':
 580                         walk_speed *= 0.75;
 581                         show_message("walk speed: %g", walk_speed);
 582                         break;
 583
 584                 case ']':
 585                         mouse_speed *= 1.2;
 586                         show_message("mouse speed: %g", mouse_speed);
 587                         break;
 588
 589                 case '[':
 590                         mouse_speed *= 0.8;
 591                         show_message("mouse speed: %g", mouse_speed);
 592                         break;
 593
 594                 case 'b':
 595                         show_blobs = !show_blobs;
 596                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 597                         break;
 598
 599                 case ' ':
 600                         goatvr_recenter();
 601                         show_message("VR recenter\n");
 602                         break;
 603
 604                 case 'x':
 605                         exman->load(mscn, "data/exhibits");
 606                         break;
 607                 }
 608         }
 609
 610         if(key < 256 && !(mod & (MOD_CTRL | MOD_ALT))) {
 611                 keystate[key] = pressed;
 612         }
 613 }
 614
 615 void app_mouse_button(int bn, bool pressed, int x, int y)
 616 {
 617         static int press_x, press_y;
 618
 619         if(debug_gui) {
 620                 debug_gui_mbutton(bn, pressed, x, y);
 621                 return; // ignore mouse events while GUI is visible
 622         }
 623
 624         prev_mx = x;
 625         prev_my = y;
 626         bnstate[bn] = pressed;
 627
 628         if(bn == 0) {
 629                 ExSelection sel;
 630                 Ray ray = calc_pick_ray(x, y);
 631                 sel = exman->select(ray);
 632
 633                 if(pressed) {
 634                         if(sel && (app_get_modifiers() & MOD_CTRL)) {
 635                                 exsel_grab_mouse = sel;
 636                                 Vec3 pos = sel.ex->node->get_position();
 637                                 debug_log("grabbing... (%g %g %g)\n", pos.x, pos.y, pos.z);
 638                                 exslot_mouse.node.set_position(pos);
 639                                 exslot_mouse.node.set_rotation(sel.ex->node->get_rotation());
 640                                 exslot_mouse.attach_exhibit(sel.ex, EXSLOT_ATTACH_TRANSIENT);
 641                                 if(exsel_active) {
 642                                         exsel_active = ExSelection::null;       // cancel active on grab
 643                                 }
 644                         }
 645                         press_x = x;
 646                         press_y = y;
 647
 648                 } else {
 649                         if(exsel_grab_mouse) {
 650                                 // cancel grab on mouse release
 651                                 debug_log("releasing...\n");
 652                                 Exhibit *ex = exsel_grab_mouse.ex;
 653                                 Vec3 pos = exslot_mouse.node.get_position();
 654                                 debug_log("release location: %g %g %g\n", pos.x, pos.y, pos.z);
 655
 656                                 ExhibitSlot *slot = exman->nearest_empty_slot(pos);
 657                                 if(!slot) {
 658                                         debug_log("no nearby slot\n");
 659                                         if(ex->prev_slot && ex->prev_slot->empty()) {
 660                                                 slot = ex->prev_slot;
 661                                                 debug_log("previous slot available though\n");
 662                                         }
 663                                 }
 664
 665                                 if(slot) {
 666                                         slot->attach_exhibit(ex);
 667                                 } else {
 668                                         // nowhere to put it, so stash it for later
 669                                         exslot_mouse.detach_exhibit();
 670                                         exman->stash_exhibit(ex);
 671                                         debug_log("no slots available, stashing\n");
 672                                 }
 673
 674                                 exsel_grab_mouse = ExSelection::null;
 675                         }
 676
 677                         if(abs(press_x - x) < 5 && abs(press_y - y) < 5) {
 678                                 exsel_active = sel;     // select or deselect active exhibit
 679                                 if(sel) {
 680                                         debug_log("selecting...\n");
 681                                 } else {
 682                                         debug_log("deselecting...\n");
 683                                 }
 684                         }
 685
 686                         press_x = press_y = INT_MIN;
 687                 }
 688         }
 689 }
 690
 691 static inline void mouse_look(float dx, float dy)
 692 {
 693         float scrsz = (float)win_height;
 694         avatar.body_rot += dx * 512.0 / scrsz;
 695         avatar.head_alt += dy * 512.0 / scrsz;
 696
 697         if(avatar.head_alt < -90) avatar.head_alt = -90;
 698         if(avatar.head_alt > 90) avatar.head_alt = 90;
 699 }
 700
 701 static void mouse_zoom(float dx, float dy)
 702 {
 703         cam_dist += dy * 0.1;
 704         if(cam_dist < 0.0) cam_dist = 0.0;
 705 }
 706
 707 void app_mouse_motion(int x, int y)
 708 {
 709         if(debug_gui) {
 710                 debug_gui_mmotion(x, y);
 711                 return; // ignore mouse events while GUI is visible
 712         }
 713
 714         int dx = x - prev_mx;
 715         int dy = y - prev_my;
 716         prev_mx = x;
 717         prev_my = y;
 718
 719         if(!dx && !dy) return;
 720
 721         if(exsel_grab_mouse) {
 722                 Vec3 pos = exslot_mouse.node.get_node_position();
 723                 Vec3 dir = transpose(view_matrix.upper3x3()) * Vec3(dx * 1.0, dy * -1.0, 0);
 724
 725                 exslot_mouse.node.set_position(pos + dir);
 726         }
 727
 728         if(bnstate[2]) {
 729                 mouse_look(dx, dy);
 730         }
 731 }
 732
 733 void app_mouse_delta(int dx, int dy)
 734 {
 735         if(bnstate[2]) {
 736                 mouse_zoom(dx * mouse_speed, dy * mouse_speed);
 737         } else {
 738                 mouse_look(dx * mouse_speed, dy * mouse_speed);
 739         }
 740 }
 741
 742 void app_mouse_wheel(int dir)
 743 {
 744         if(debug_gui) {
 745                 debug_gui_wheel(dir);
 746         }
 747 }
 748
 749 void app_gamepad_axis(int axis, float val)
 750 {
 751         switch(axis) {
 752         case 0:
 753                 joy_move.x = val;
 754                 break;
 755         case 1:
 756                 joy_move.y = val;
 757                 break;
 758
 759         case 2:
 760                 joy_look.x = val;
 761                 break;
 762         case 3:
 763                 joy_look.y = val;
 764                 break;
 765         }
 766 }
 767
 768 void app_gamepad_button(int bn, bool pressed)
 769 {
 770         gpad_bnstate[bn] = pressed;
 771
 772         if(pressed) {
 773                 switch(bn) {
 774                 case GPAD_LSTICK:
 775                         toggle_flight();
 776                         break;
 777
 778                 case GPAD_X:
 779                         show_blobs = !show_blobs;
 780                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 781                         break;
 782
 783                 case GPAD_START:
 784                         goatvr_recenter();
 785                         show_message("VR recenter\n");
 786                         break;
 787
 788                 default:
 789                         break;
 790                 }
 791         }
 792 }
 793
 794 static void toggle_flight()
 795 {
 796         static float prev_walk_speed = -1.0;
 797         if(prev_walk_speed < 0.0) {
 798                 noclip = true;
 799                 prev_walk_speed = walk_speed;
 800                 walk_speed = 1000.0;
 801                 show_message("fly mode\n");
 802         } else {
 803                 noclip = false;
 804                 walk_speed = prev_walk_speed;
 805                 prev_walk_speed = -1.0;
 806                 show_message("walk mode\n");
 807         }
 808 }
 809
 810 static void calc_framerate()
 811 {
 812         //static int ncalc;
 813         static int nframes;
 814         static long prev_upd;
 815
 816         long elapsed = time_msec - prev_upd;
 817         if(elapsed >= 1000) {
 818                 framerate = (float)nframes / (float)(elapsed * 0.001);
 819                 nframes = 1;
 820                 prev_upd = time_msec;
 821
 822                 /*if(++ncalc >= 5) {
 823                         printf("fps: %f\n", framerate);
 824                         ncalc = 0;
 825                 }*/
 826         } else {
 827                 ++nframes;
 828         }
 829 }
 830
 831 static Ray calc_pick_ray(int x, int y)
 832 {
 833         float nx = (float)x / (float)win_width;
 834         float ny = (float)(win_height - y) / (float)win_height;
 835
 836         last_pick_ray = mouse_pick_ray(nx, ny, view_matrix, proj_matrix);
 837         return last_pick_ray;
 838 }