git.mutantstargoat.com Git - laserbrain_demo/blob - 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 BlobExhibit *blobs;
  75 static bool show_blobs;
  76
  77 ExSelection exsel_active, exsel_hover;
  78 ExSelection exsel_grab_left, exsel_grab_right;
  79 #define exsel_grab_mouse exsel_grab_right
  80 static ExhibitSlot exslot_left, exslot_right;
  81 #define exslot_mouse exslot_right
  82
  83 static Renderer *rend;
  84
  85 static Ray last_pick_ray;
  86
  87
  88 bool app_init(int argc, char **argv)
  89 {
  90         set_log_file("demo.log");
  91
  92         char *env = getenv("FPEXCEPT");
  93         if(env && atoi(env)) {
  94                 info_log("enabling floating point exceptions\n");
  95                 fpexcept_enabled = 1;
  96                 enable_fpexcept();
  97         }
  98
  99         if(init_opengl() == -1) {
 100                 return false;
 101         }
 102
 103         if(!init_options(argc, argv, "demo.conf")) {
 104                 return false;
 105         }
 106         app_resize(opt.width, opt.height);
 107         app_fullscreen(opt.fullscreen);
 108
 109         if(opt.vr) {
 110                 if(goatvr_init() == -1) {
 111                         return false;
 112                 }
 113                 goatvr_set_origin_mode(GOATVR_HEAD);
 114                 goatvr_set_units_scale(100.0f);
 115
 116                 goatvr_startvr();
 117                 should_swap = goatvr_should_swap() != 0;
 118                 user_eye_height = goatvr_get_eye_height();
 119                 have_headtracking = goatvr_have_headtracking();
 120                 have_handtracking = goatvr_have_handtracking();
 121
 122                 goatvr_recenter();
 123         }
 124
 125         if(fb_srgb) {
 126                 int srgb_capable;
 127                 glGetIntegerv(GL_FRAMEBUFFER_SRGB_CAPABLE_EXT, &srgb_capable);
 128                 printf("Framebuffer %s sRGB-capable\n", srgb_capable ? "is" : "is not");
 129                 if(srgb_capable) {
 130                         glEnable(GL_FRAMEBUFFER_SRGB);
 131                 } else {
 132                         fb_srgb = 0;
 133                 }
 134         }
 135
 136         glEnable(GL_MULTISAMPLE);
 137         glEnable(GL_DEPTH_TEST);
 138         glEnable(GL_CULL_FACE);
 139         glEnable(GL_NORMALIZE);
 140
 141         if(!init_debug_gui()) {
 142                 return false;
 143         }
 144
 145         Mesh::use_custom_sdr_attr = false;
 146
 147         float ambient[] = {0.0, 0.0, 0.0, 0.0};
 148         glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);
 149
 150         glClearColor(1, 1, 1, 1);
 151
 152         init_audio();
 153
 154         if(!init_vrhands()) {
 155                 return false;
 156         }
 157
 158         mscn = new MetaScene;
 159         if(!mscn->load(opt.scenefile ? opt.scenefile : "data/museum.scene")) {
 160                 return false;
 161         }
 162
 163         avatar.pos = mscn->start_pos;
 164         Vec3 dir = rotate(Vec3(0, 0, 1), mscn->start_rot);
 165         dir.y = 0;
 166         avatar.body_rot = rad_to_deg(acos(dot(dir, Vec3(0, 0, 1))));
 167
 168         exman = new ExhibitManager;
 169         /*
 170         if(!exman->load(mscn, "data/exhibits")) {
 171                 //return false;
 172         }
 173         */
 174
 175         blobs = new BlobExhibit;
 176         blobs->node = new SceneNode;
 177         blobs->init();
 178         blobs->node->set_position(Vec3(-680, 160, -100));
 179         blobs->node->set_scaling(Vec3(28, 28, 28));
 180         blobs->node->update(0);
 181
 182         exman->add(blobs);
 183
 184         if(!(sdr_ltmap_notex = create_program_load("sdr/lightmap.v.glsl", "sdr/lightmap-notex.p.glsl"))) {
 185                 return false;
 186         }
 187         set_uniform_int(sdr_ltmap_notex, "texmap", MTL_TEX_DIFFUSE);
 188         set_uniform_int(sdr_ltmap_notex, "lightmap", MTL_TEX_LIGHTMAP);
 189
 190         if(!(sdr_ltmap = create_program_load("sdr/lightmap.v.glsl", "sdr/lightmap-tex.p.glsl"))) {
 191                 return false;
 192         }
 193         set_uniform_int(sdr_ltmap, "texmap", MTL_TEX_DIFFUSE);
 194         set_uniform_int(sdr_ltmap, "lightmap", MTL_TEX_LIGHTMAP);
 195
 196         if(!fb_srgb) {
 197                 sdr_post_gamma = create_program_load("sdr/post_gamma.v.glsl", "sdr/post_gamma.p.glsl");
 198         }
 199
 200         rend = new Renderer;
 201         rend->set_scene(mscn);
 202
 203         glUseProgram(0);
 204
 205         if(opt.vr || opt.fullscreen) {
 206                 app_grab_mouse(true);
 207         }
 208
 209         if(mscn->music && opt.music) {
 210                 mscn->music->play(AUDIO_PLAYMODE_LOOP);
 211         }
 212         return true;
 213 }
 214
 215 void app_cleanup()
 216 {
 217         if(mscn->music) {
 218                 mscn->music->stop();
 219         }
 220         destroy_audio();
 221
 222         app_grab_mouse(false);
 223         if(opt.vr) {
 224                 goatvr_shutdown();
 225         }
 226         destroy_vrhands();
 227
 228         delete rend;
 229
 230         /* this must be destroyed before the scene graph to detach exhibit nodes
 231          * before the scene tries to delete them recursively
 232          */
 233         delete exman;
 234
 235         texman.clear();
 236         sceneman.clear();
 237
 238         cleanup_debug_gui();
 239 }
 240
 241 static bool constrain_walk_mesh(const Vec3 &v, Vec3 *newv)
 242 {
 243         Mesh *wm = mscn->walk_mesh;
 244         if(!wm) {
 245                 *newv = v;
 246                 return true;
 247         }
 248
 249         Ray downray = Ray(v, Vec3(0, -1, 0));
 250         HitPoint hit;
 251         if(mscn->walk_mesh->intersect(downray, &hit)) {
 252                 *newv = hit.pos;
 253                 newv->y += user_eye_height;
 254                 return true;
 255         }
 256         return false;
 257 }
 258
 259 static void update(float dt)
 260 {
 261         texman.update();
 262         sceneman.update();
 263
 264         mscn->update(dt);
 265         exman->update(dt);
 266
 267         float speed = walk_speed * dt;
 268         Vec3 dir;
 269
 270         // joystick
 271         float jdeadsq = joy_deadzone * joy_deadzone;
 272         float jmove_lensq = length_sq(joy_move);
 273         float jlook_lensq = length_sq(joy_look);
 274
 275         if(jmove_lensq > jdeadsq) {
 276                 float len = sqrt(jmove_lensq);
 277                 jmove_lensq -= jdeadsq;
 278
 279                 float mag = len * len;
 280                 dir.x += mag * joy_move.x / len * 2.0 * speed;
 281                 dir.z += mag * joy_move.y / len * 2.0 * speed;
 282         }
 283         if(jlook_lensq > jdeadsq) {
 284                 float len = sqrt(jlook_lensq);
 285                 jlook_lensq -= jdeadsq;
 286
 287                 float mag = len * len;
 288                 avatar.body_rot += mag * joy_look.x / len * 200.0 * dt;
 289                 avatar.head_alt += mag * joy_look.y / len * 100.0 * dt;
 290                 if(avatar.head_alt < -90.0f) avatar.head_alt = -90.0f;
 291                 if(avatar.head_alt > 90.0f) avatar.head_alt = 90.0f;
 292         }
 293
 294         // keyboard move
 295         if(keystate[(int)'w']) {
 296                 dir.z -= speed;
 297         }
 298         if(keystate[(int)'s']) {
 299                 dir.z += speed;
 300         }
 301         if(keystate[(int)'d']) {
 302                 dir.x += speed;
 303         }
 304         if(keystate[(int)'a']) {
 305                 dir.x -= speed;
 306         }
 307         if(keystate[(int)'q'] || gpad_bnstate[GPAD_UP]) {
 308                 avatar.pos.y += speed;
 309         }
 310         if(keystate[(int)'z'] || gpad_bnstate[GPAD_DOWN]) {
 311                 avatar.pos.y -= speed;
 312         }
 313
 314         float theta = M_PI * avatar.body_rot / 180.0f;
 315         Vec3 newpos;
 316         newpos.x = avatar.pos.x + cos(theta) * dir.x - sin(theta) * dir.z;
 317         newpos.y = avatar.pos.y;
 318         newpos.z = avatar.pos.z + sin(theta) * dir.x + cos(theta) * dir.z;
 319
 320         if(noclip) {
 321                 avatar.pos = newpos;
 322         } else {
 323                 if(!constrain_walk_mesh(newpos, &avatar.pos)) {
 324                         float dtheta = M_PI / 32.0;
 325                         float theta = dtheta;
 326                         Vec2 dir2d = newpos.xz() - avatar.pos.xz();
 327
 328                         for(int i=0; i<16; i++) {
 329                                 Vec2 dvec = rotate(dir2d, theta);
 330                                 Vec3 pos = avatar.pos + Vec3(dvec.x, 0, dvec.y);
 331                                 if(constrain_walk_mesh(pos, &avatar.pos)) {
 332                                         break;
 333                                 }
 334                                 dvec = rotate(dir2d, -theta);
 335                                 pos = avatar.pos + Vec3(dvec.x, 0, dvec.y);
 336                                 if(constrain_walk_mesh(pos, &avatar.pos)) {
 337                                         break;
 338                                 }
 339                                 theta += dtheta;
 340                         }
 341                 }
 342                 floor_y = avatar.pos.y - user_eye_height;
 343         }
 344
 345         // TODO move to the avatar system
 346         // calculate mouselook view matrix
 347         mouse_view_matrix = Mat4::identity;
 348         mouse_view_matrix.pre_translate(0, 0, -cam_dist);
 349         if(!have_headtracking) {
 350                 mouse_view_matrix.pre_rotate_x(deg_to_rad(avatar.head_alt));
 351         }
 352         mouse_view_matrix.pre_rotate_y(deg_to_rad(avatar.body_rot));
 353         mouse_view_matrix.pre_translate(-avatar.pos.x, -avatar.pos.y, -avatar.pos.z);
 354
 355         // check if an exhibit is hovered-over by mouse or 6dof (only if we don't have one grabbed)
 356         if(!exsel_grab_mouse) {
 357                 // XXX note: using previous view/proj matrix lattency shouldn't be an issue but
 358                 //           make sure state-creep doesn't get us
 359                 // XXX also this mouse-picking probably should only be active in non-VR mode
 360                 Ray ray = calc_pick_ray(prev_mx, prev_my);
 361                 exsel_hover = exman->select(ray);
 362         }
 363
 364         if(!exslot_left.empty()) exslot_left.node.update(dt);
 365         if(!exslot_right.empty()) exslot_right.node.update(dt);
 366
 367         // update hand-tracking
 368         if(have_handtracking) {
 369                 update_vrhands(&avatar);
 370         }
 371 }
 372
 373 void app_display()
 374 {
 375         float dt = (float)(time_msec - prev_msec) / 1000.0f;
 376         prev_msec = time_msec;
 377
 378         if(debug_gui) {
 379                 ImGui::GetIOPtr()->DeltaTime = dt;
 380                 ImGui::NewFrame();
 381
 382                 ImGui::ShowTestWindow();
 383         }
 384
 385         if(opt.vr) {
 386                 // VR mode
 387                 goatvr_draw_start();
 388                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 389
 390                 update(dt);
 391
 392                 for(int i=0; i<2; i++) {
 393                         // for each eye
 394                         goatvr_draw_eye(i);
 395
 396                         proj_matrix = goatvr_projection_matrix(i, NEAR_CLIP, FAR_CLIP);
 397                         glMatrixMode(GL_PROJECTION);
 398                         glLoadMatrixf(proj_matrix[0]);
 399
 400                         view_matrix = mouse_view_matrix * Mat4(goatvr_view_matrix(i));
 401                         glMatrixMode(GL_MODELVIEW);
 402                         glLoadMatrixf(view_matrix[0]);
 403
 404                         draw_scene();
 405                         if(have_handtracking) {
 406                                 draw_vrhands();
 407                         }
 408
 409                         if(debug_gui) {
 410                                 ImGui::Render();
 411                         }
 412                 }
 413                 goatvr_draw_done();
 414
 415                 if(should_swap) {
 416                         app_swap_buffers();
 417                 }
 418
 419         } else {
 420                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 421
 422                 update(dt);
 423
 424                 proj_matrix.perspective(deg_to_rad(50.0), win_aspect, NEAR_CLIP, FAR_CLIP);
 425                 glMatrixMode(GL_PROJECTION);
 426                 glLoadMatrixf(proj_matrix[0]);
 427
 428                 view_matrix = mouse_view_matrix;
 429                 glMatrixMode(GL_MODELVIEW);
 430                 glLoadMatrixf(view_matrix[0]);
 431
 432                 draw_scene();
 433
 434                 if(!fb_srgb && sdr_post_gamma) {
 435                         slow_post(sdr_post_gamma);
 436                         glUseProgram(0);
 437                 }
 438
 439                 if(debug_gui) {
 440                         ImGui::Render();
 441                 }
 442                 app_swap_buffers();
 443         }
 444         assert(glGetError() == GL_NO_ERROR);
 445
 446         calc_framerate();
 447 }
 448
 449
 450 static void draw_scene()
 451 {
 452         rend->draw();
 453         exman->draw();
 454
 455         /*
 456         if(have_handtracking) {
 457                 Mat4 head_xform = inverse(mouse_view_matrix);//goatvr_head_matrix();
 458                 Mat4 head_dir_xform = head_xform.upper3x3();
 459
 460                 glUseProgram(0);
 461                 glPushAttrib(GL_ENABLE_BIT);
 462                 glDisable(GL_LIGHTING);
 463                 glBegin(GL_LINES);
 464                 for(int i=0; i<2; i++) {
 465                         if(hand[i].valid) {
 466                                 glColor3f(i, 1 - i, i);
 467                         } else {
 468                                 glColor3f(0.5, 0.5, 0.5);
 469                         }
 470                         Vec3 v = head_xform * hand[i].pos;
 471                         Vec3 dir = head_dir_xform * rotate(Vec3(0, 0, -1), hand[i].rot) * 20.0f;
 472                         Vec3 up = head_dir_xform * rotate(Vec3(0, 1, 0), hand[i].rot) * 10.0f;
 473                         Vec3 right = head_dir_xform * rotate(Vec3(1, 0, 0), hand[i].rot) * 10.0f;
 474
 475                         glVertex3f(v.x, v.y, v.z);
 476                         glVertex3f(v.x + dir.x, v.y + dir.y, v.z + dir.z);
 477                         glVertex3f(v.x - right.x, v.y - right.y, v.z - right.z);
 478                         glVertex3f(v.x + right.x, v.y + right.y, v.z + right.z);
 479                         glVertex3f(v.x - up.x, v.y - up.y, v.z - up.z);
 480                         glVertex3f(v.x + up.x, v.y + up.y, v.z + up.z);
 481                 }
 482                 glEnd();
 483                 glPopAttrib();
 484         }
 485         */
 486
 487         if(debug_gui && dbg_sel_node) {
 488                 AABox bvol = dbg_sel_node->get_bounds();
 489                 draw_geom_object(&bvol);
 490         }
 491
 492         if(show_walk_mesh && mscn->walk_mesh) {
 493                 glPushAttrib(GL_ENABLE_BIT);
 494                 glEnable(GL_BLEND);
 495                 glBlendFunc(GL_ONE, GL_ONE);
 496                 glEnable(GL_POLYGON_OFFSET_FILL);
 497
 498                 glUseProgram(0);
 499
 500                 glPolygonOffset(-1, 1);
 501                 glDepthMask(0);
 502
 503                 glColor3f(0.3, 0.08, 0.01);
 504                 mscn->walk_mesh->draw();
 505
 506                 glDepthMask(1);
 507
 508                 glPopAttrib();
 509         }
 510
 511         print_text(Vec2(9 * win_width / 10, 20), Vec3(1, 1, 0), "fps: %.1f", framerate);
 512         draw_ui();
 513 }
 514
 515
 516 void app_reshape(int x, int y)
 517 {
 518         glViewport(0, 0, x, y);
 519         goatvr_set_fb_size(x, y, 1.0f);
 520         debug_gui_reshape(x, y);
 521 }
 522
 523 void app_keyboard(int key, bool pressed)
 524 {
 525         unsigned int mod = app_get_modifiers();
 526
 527         if(debug_gui && !(pressed && (key == '`' || key == 27))) {
 528                 debug_gui_key(key, pressed, mod);
 529                 return; // ignore all keystrokes when GUI is visible
 530         }
 531
 532         if(pressed) {
 533                 switch(key) {
 534                 case 27:
 535                         app_quit();
 536                         break;
 537
 538                 case '\n':
 539                 case '\r':
 540                         if(mod & MOD_ALT) {
 541                                 app_toggle_fullscreen();
 542                         }
 543                         break;
 544
 545                 case '`':
 546                         debug_gui = !debug_gui;
 547                         show_message("debug gui %s", debug_gui ? "enabled" : "disabled");
 548                         break;
 549
 550                 case 'm':
 551                         app_toggle_grab_mouse();
 552                         show_message("mouse %s", app_is_mouse_grabbed() ? "grabbed" : "released");
 553                         break;
 554
 555                 case 'w':
 556                         if(mod & MOD_CTRL) {
 557                                 show_walk_mesh = !show_walk_mesh;
 558                                 show_message("walk mesh: %s", show_walk_mesh ? "on" : "off");
 559                         }
 560                         break;
 561
 562                 case 'c':
 563                         if(mod & MOD_CTRL) {
 564                                 noclip = !noclip;
 565                                 show_message(noclip ? "no clip" : "clip");
 566                         }
 567                         break;
 568
 569                 case 'f':
 570                         toggle_flight();
 571                         break;
 572
 573                 case 'p':
 574                         if(mod & MOD_CTRL) {
 575                                 fb_srgb = !fb_srgb;
 576                                 show_message("gamma correction for non-sRGB framebuffers: %s\n", fb_srgb ? "off" : "on");
 577                         }
 578                         break;
 579
 580                 case '=':
 581                         walk_speed *= 1.25;
 582                         show_message("walk speed: %g", walk_speed);
 583                         break;
 584
 585                 case '-':
 586                         walk_speed *= 0.75;
 587                         show_message("walk speed: %g", walk_speed);
 588                         break;
 589
 590                 case ']':
 591                         mouse_speed *= 1.2;
 592                         show_message("mouse speed: %g", mouse_speed);
 593                         break;
 594
 595                 case '[':
 596                         mouse_speed *= 0.8;
 597                         show_message("mouse speed: %g", mouse_speed);
 598                         break;
 599
 600                 case 'b':
 601                         show_blobs = !show_blobs;
 602                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 603                         break;
 604
 605                 case ' ':
 606                         goatvr_recenter();
 607                         show_message("VR recenter\n");
 608                         break;
 609
 610                 case 'x':
 611                         exman->load(mscn, "data/exhibits");
 612                         break;
 613                 }
 614         }
 615
 616         if(key < 256 && !(mod & (MOD_CTRL | MOD_ALT))) {
 617                 keystate[key] = pressed;
 618         }
 619 }
 620
 621 void app_mouse_button(int bn, bool pressed, int x, int y)
 622 {
 623         static int press_x, press_y;
 624
 625         if(debug_gui) {
 626                 debug_gui_mbutton(bn, pressed, x, y);
 627                 return; // ignore mouse events while GUI is visible
 628         }
 629
 630         prev_mx = x;
 631         prev_my = y;
 632         bnstate[bn] = pressed;
 633
 634         if(bn == 0) {
 635                 ExSelection sel;
 636                 Ray ray = calc_pick_ray(x, y);
 637                 sel = exman->select(ray);
 638
 639                 if(pressed) {
 640                         if(sel && (app_get_modifiers() & MOD_CTRL)) {
 641                                 exsel_grab_mouse = sel;
 642                                 Vec3 pos = sel.ex->node->get_position();
 643                                 debug_log("grabbing... (%g %g %g)\n", pos.x, pos.y, pos.z);
 644                                 exslot_mouse.node.set_position(pos);
 645                                 exslot_mouse.node.set_rotation(sel.ex->node->get_rotation());
 646                                 exslot_mouse.attach_exhibit(sel.ex, EXSLOT_ATTACH_TRANSIENT);
 647                                 if(exsel_active) {
 648                                         exsel_active = ExSelection::null;       // cancel active on grab
 649                                 }
 650                         }
 651                         press_x = x;
 652                         press_y = y;
 653
 654                 } else {
 655                         if(exsel_grab_mouse) {
 656                                 // cancel grab on mouse release
 657                                 Exhibit *ex = exsel_grab_mouse.ex;
 658                                 Vec3 pos = exslot_mouse.node.get_position();
 659
 660                                 debug_log("releasing at %g %g %g ...\n", pos.x, pos.y, pos.z);
 661
 662                                 exslot_mouse.detach_exhibit();
 663
 664                                 ExhibitSlot *slot = exman->nearest_empty_slot(pos, 100);
 665                                 if(!slot) {
 666                                         debug_log("no empty slot nearby\n");
 667                                         if(ex->prev_slot && ex->prev_slot->empty()) {
 668                                                 slot = ex->prev_slot;
 669                                                 debug_log("using previous slot");
 670                                         }
 671                                 }
 672
 673                                 if(slot) {
 674                                         slot->attach_exhibit(ex);
 675                                 } else {
 676                                         // nowhere to put it, so stash it for later
 677                                         exslot_mouse.detach_exhibit();
 678                                         exman->stash_exhibit(ex);
 679                                         debug_log("no slots available, stashing\n");
 680                                 }
 681
 682                                 exsel_grab_mouse = ExSelection::null;
 683                         }
 684
 685                         if(abs(press_x - x) < 5 && abs(press_y - y) < 5) {
 686                                 exsel_active = sel;     // select or deselect active exhibit
 687                                 if(sel) {
 688                                         debug_log("selecting...\n");
 689                                 } else {
 690                                         debug_log("deselecting...\n");
 691                                 }
 692                         }
 693
 694                         press_x = press_y = INT_MIN;
 695                 }
 696         }
 697 }
 698
 699 static inline void mouse_look(float dx, float dy)
 700 {
 701         float scrsz = (float)win_height;
 702         avatar.body_rot += dx * 512.0 / scrsz;
 703         avatar.head_alt += dy * 512.0 / scrsz;
 704
 705         if(avatar.head_alt < -90) avatar.head_alt = -90;
 706         if(avatar.head_alt > 90) avatar.head_alt = 90;
 707 }
 708
 709 static void mouse_zoom(float dx, float dy)
 710 {
 711         cam_dist += dy * 0.1;
 712         if(cam_dist < 0.0) cam_dist = 0.0;
 713 }
 714
 715 void app_mouse_motion(int x, int y)
 716 {
 717         if(debug_gui) {
 718                 debug_gui_mmotion(x, y);
 719                 return; // ignore mouse events while GUI is visible
 720         }
 721
 722         int dx = x - prev_mx;
 723         int dy = y - prev_my;
 724         prev_mx = x;
 725         prev_my = y;
 726
 727         if(!dx && !dy) return;
 728
 729         if(exsel_grab_mouse) {
 730                 Vec3 pos = exslot_mouse.node.get_node_position();
 731                 Vec3 dir = transpose(view_matrix.upper3x3()) * Vec3(dx * 1.0, dy * -1.0, 0);
 732
 733                 exslot_mouse.node.set_position(pos + dir);
 734         }
 735
 736         if(bnstate[2]) {
 737                 mouse_look(dx, dy);
 738         }
 739 }
 740
 741 void app_mouse_delta(int dx, int dy)
 742 {
 743         if(bnstate[2]) {
 744                 mouse_zoom(dx * mouse_speed, dy * mouse_speed);
 745         } else {
 746                 mouse_look(dx * mouse_speed, dy * mouse_speed);
 747         }
 748 }
 749
 750 void app_mouse_wheel(int dir)
 751 {
 752         if(debug_gui) {
 753                 debug_gui_wheel(dir);
 754         }
 755 }
 756
 757 void app_gamepad_axis(int axis, float val)
 758 {
 759         switch(axis) {
 760         case 0:
 761                 joy_move.x = val;
 762                 break;
 763         case 1:
 764                 joy_move.y = val;
 765                 break;
 766
 767         case 2:
 768                 joy_look.x = val;
 769                 break;
 770         case 3:
 771                 joy_look.y = val;
 772                 break;
 773         }
 774 }
 775
 776 void app_gamepad_button(int bn, bool pressed)
 777 {
 778         gpad_bnstate[bn] = pressed;
 779
 780         if(pressed) {
 781                 switch(bn) {
 782                 case GPAD_LSTICK:
 783                         toggle_flight();
 784                         break;
 785
 786                 case GPAD_X:
 787                         show_blobs = !show_blobs;
 788                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 789                         break;
 790
 791                 case GPAD_START:
 792                         goatvr_recenter();
 793                         show_message("VR recenter\n");
 794                         break;
 795
 796                 default:
 797                         break;
 798                 }
 799         }
 800 }
 801
 802 static void toggle_flight()
 803 {
 804         static float prev_walk_speed = -1.0;
 805         if(prev_walk_speed < 0.0) {
 806                 noclip = true;
 807                 prev_walk_speed = walk_speed;
 808                 walk_speed = 1000.0;
 809                 show_message("fly mode\n");
 810         } else {
 811                 noclip = false;
 812                 walk_speed = prev_walk_speed;
 813                 prev_walk_speed = -1.0;
 814                 show_message("walk mode\n");
 815         }
 816 }
 817
 818 static void calc_framerate()
 819 {
 820         //static int ncalc;
 821         static int nframes;
 822         static long prev_upd;
 823
 824         long elapsed = time_msec - prev_upd;
 825         if(elapsed >= 1000) {
 826                 framerate = (float)nframes / (float)(elapsed * 0.001);
 827                 nframes = 1;
 828                 prev_upd = time_msec;
 829
 830                 /*if(++ncalc >= 5) {
 831                         printf("fps: %f\n", framerate);
 832                         ncalc = 0;
 833                 }*/
 834         } else {
 835                 ++nframes;
 836         }
 837 }
 838
 839 static Ray calc_pick_ray(int x, int y)
 840 {
 841         float nx = (float)x / (float)win_width;
 842         float ny = (float)(win_height - y) / (float)win_height;
 843
 844         last_pick_ray = mouse_pick_ray(nx, ny, view_matrix, proj_matrix);
 845         return last_pick_ray;
 846 }