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

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