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 "vrinput.h"
  18 #include "exman.h"
  19 #include "blob_exhibit.h"
  20
  21 #define NEAR_CLIP       5.0
  22 #define FAR_CLIP        10000.0
  23
  24 static void draw_scene();
  25 static void toggle_flight();
  26 static void calc_framerate();
  27
  28 long time_msec;
  29 int win_width, win_height;
  30 float win_aspect;
  31 bool fb_srgb;
  32 bool opt_gear_wireframe;
  33
  34 TextureSet texman;
  35 SceneSet sceneman;
  36
  37 unsigned int sdr_ltmap, sdr_ltmap_notex;
  38
  39 static float cam_dist = 0.0;
  40 static float cam_theta, cam_phi;
  41 static Vec3 cam_pos;
  42 static float floor_y;   // last floor height
  43 static float user_eye_height = 165;
  44
  45 static float walk_speed = 300.0f;
  46 static float mouse_speed = 0.5f;
  47 static bool show_walk_mesh, noclip = false;
  48
  49 static bool have_headtracking, have_handtracking, should_swap;
  50
  51 static int prev_mx, prev_my;
  52 static bool bnstate[8];
  53 static bool keystate[256];
  54 static bool gpad_bnstate[64];
  55 static Vec2 joy_move, joy_look;
  56 static float joy_deadzone = 0.01;
  57
  58 static float framerate;
  59
  60 static Mat4 view_matrix, mouse_view_matrix, proj_matrix;
  61 static MetaScene *mscn;
  62 static unsigned int sdr_post_gamma;
  63
  64 static long prev_msec;
  65
  66 static ExhibitManager *exman;
  67 static BlobExhibit *blobs;
  68 static bool show_blobs;
  69
  70 static Renderer *rend;
  71
  72
  73 bool app_init(int argc, char **argv)
  74 {
  75         if(!init_options(argc, argv, "demo.conf")) {
  76                 return false;
  77         }
  78         app_resize(opt.width, opt.height);
  79         app_fullscreen(opt.fullscreen);
  80
  81         if(opt.vr) {
  82                 if(goatvr_init() == -1) {
  83                         return false;
  84                 }
  85                 goatvr_set_origin_mode(GOATVR_HEAD);
  86                 goatvr_set_units_scale(100.0f);
  87
  88                 goatvr_startvr();
  89                 should_swap = goatvr_should_swap() != 0;
  90                 user_eye_height = goatvr_get_eye_height();
  91                 have_headtracking = goatvr_have_headtracking();
  92                 have_handtracking = goatvr_have_handtracking();
  93
  94                 goatvr_recenter();
  95         }
  96
  97         int srgb_capable;
  98         glGetIntegerv(GL_FRAMEBUFFER_SRGB_CAPABLE_EXT, &srgb_capable);
  99         printf("Framebuffer %s sRGB-capable\n", srgb_capable ? "is" : "is not");
 100         fb_srgb = srgb_capable != 0;
 101         glEnable(GL_FRAMEBUFFER_SRGB);
 102
 103         glEnable(GL_MULTISAMPLE);
 104         glEnable(GL_DEPTH_TEST);
 105         glEnable(GL_CULL_FACE);
 106         glEnable(GL_LIGHTING);
 107         glEnable(GL_NORMALIZE);
 108
 109         Mesh::use_custom_sdr_attr = false;
 110
 111         float ambient[] = {0.0, 0.0, 0.0, 0.0};
 112         glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);
 113
 114         glClearColor(1, 1, 1, 1);
 115
 116         if(!init_vrhands()) {
 117                 return false;
 118         }
 119
 120         mscn = new MetaScene;
 121         if(!mscn->load(opt.scenefile ? opt.scenefile : "data/museum.scene")) {
 122                 return false;
 123         }
 124
 125         cam_pos = mscn->start_pos;
 126         Vec3 dir = rotate(Vec3(0, 0, 1), mscn->start_rot);
 127         dir.y = 0;
 128         cam_theta = rad_to_deg(acos(dot(dir, Vec3(0, 0, 1))));
 129
 130         exman = new ExhibitManager;
 131         if(!exman->load(mscn, "data/exhibits")) {
 132                 //return false;
 133         }
 134
 135         blobs = new BlobExhibit;
 136         blobs->node = new SceneNode;
 137         blobs->init();
 138         blobs->node->set_position(Vec3(-680, 160, -100));
 139         blobs->node->set_scaling(Vec3(28, 28, 28));
 140         blobs->node->update(0);
 141
 142         exman->add(blobs);
 143
 144         if(!(sdr_ltmap_notex = create_program_load("sdr/lightmap.v.glsl", "sdr/lightmap-notex.p.glsl"))) {
 145                 return false;
 146         }
 147         set_uniform_int(sdr_ltmap_notex, "texmap", MTL_TEX_DIFFUSE);
 148         set_uniform_int(sdr_ltmap_notex, "lightmap", MTL_TEX_LIGHTMAP);
 149
 150         if(!(sdr_ltmap = create_program_load("sdr/lightmap.v.glsl", "sdr/lightmap-tex.p.glsl"))) {
 151                 return false;
 152         }
 153         set_uniform_int(sdr_ltmap, "texmap", MTL_TEX_DIFFUSE);
 154         set_uniform_int(sdr_ltmap, "lightmap", MTL_TEX_LIGHTMAP);
 155
 156         if(!fb_srgb) {
 157                 sdr_post_gamma = create_program_load("sdr/post_gamma.v.glsl", "sdr/post_gamma.p.glsl");
 158         }
 159
 160         rend = new Renderer;
 161         rend->set_scene(mscn);
 162
 163         glUseProgram(0);
 164
 165         if(opt.vr || opt.fullscreen) {
 166                 app_grab_mouse(true);
 167         }
 168         return true;
 169 }
 170
 171 void app_cleanup()
 172 {
 173         app_grab_mouse(false);
 174         if(opt.vr) {
 175                 goatvr_shutdown();
 176         }
 177         destroy_vrhands();
 178
 179         delete rend;
 180
 181         delete exman;
 182
 183         texman.clear();
 184         sceneman.clear();
 185 }
 186
 187 static bool constrain_walk_mesh(const Vec3 &v, Vec3 *newv)
 188 {
 189         Mesh *wm = mscn->walk_mesh;
 190         if(!wm) {
 191                 *newv = v;
 192                 return true;
 193         }
 194
 195         Ray downray = Ray(v, Vec3(0, -1, 0));
 196         HitPoint hit;
 197         if(mscn->walk_mesh->intersect(downray, &hit)) {
 198                 *newv = hit.pos;
 199                 newv->y += user_eye_height;
 200                 return true;
 201         }
 202         return false;
 203 }
 204
 205 static void update(float dt)
 206 {
 207         texman.update();
 208         sceneman.update();
 209
 210         mscn->update(dt);
 211         exman->update(dt);
 212
 213         float speed = walk_speed * dt;
 214         Vec3 dir;
 215
 216         // joystick
 217         float jdeadsq = joy_deadzone * joy_deadzone;
 218         float jmove_lensq = length_sq(joy_move);
 219         float jlook_lensq = length_sq(joy_look);
 220
 221         if(jmove_lensq > jdeadsq) {
 222                 float len = sqrt(jmove_lensq);
 223                 jmove_lensq -= jdeadsq;
 224
 225                 float mag = len * len;
 226                 dir.x += mag * joy_move.x / len * 2.0 * speed;
 227                 dir.z += mag * joy_move.y / len * 2.0 * speed;
 228         }
 229         if(jlook_lensq > jdeadsq) {
 230                 float len = sqrt(jlook_lensq);
 231                 jlook_lensq -= jdeadsq;
 232
 233                 float mag = len * len;
 234                 cam_theta += mag * joy_look.x / len * 200.0 * dt;
 235                 cam_phi += mag * joy_look.y / len * 100.0 * dt;
 236                 if(cam_phi < -90.0f) cam_phi = -90.0f;
 237                 if(cam_phi > 90.0f) cam_phi = 90.0f;
 238         }
 239
 240         // keyboard move
 241         if(keystate[(int)'w']) {
 242                 dir.z -= speed;
 243         }
 244         if(keystate[(int)'s']) {
 245                 dir.z += speed;
 246         }
 247         if(keystate[(int)'d']) {
 248                 dir.x += speed;
 249         }
 250         if(keystate[(int)'a']) {
 251                 dir.x -= speed;
 252         }
 253         if(keystate[(int)'q'] || gpad_bnstate[GPAD_UP]) {
 254                 cam_pos.y += speed;
 255         }
 256         if(keystate[(int)'z'] || gpad_bnstate[GPAD_DOWN]) {
 257                 cam_pos.y -= speed;
 258         }
 259
 260         float theta = M_PI * cam_theta / 180.0f;
 261         Vec3 newpos;
 262         newpos.x = cam_pos.x + cos(theta) * dir.x - sin(theta) * dir.z;
 263         newpos.y = cam_pos.y;
 264         newpos.z = cam_pos.z + sin(theta) * dir.x + cos(theta) * dir.z;
 265
 266         if(noclip) {
 267                 cam_pos = newpos;
 268         } else {
 269                 if(!constrain_walk_mesh(newpos, &cam_pos)) {
 270                         float dtheta = M_PI / 32.0;
 271                         float theta = dtheta;
 272                         Vec2 dir2d = newpos.xz() - cam_pos.xz();
 273
 274                         for(int i=0; i<16; i++) {
 275                                 Vec2 dvec = rotate(dir2d, theta);
 276                                 Vec3 pos = cam_pos + Vec3(dvec.x, 0, dvec.y);
 277                                 if(constrain_walk_mesh(pos, &cam_pos)) {
 278                                         break;
 279                                 }
 280                                 dvec = rotate(dir2d, -theta);
 281                                 pos = cam_pos + Vec3(dvec.x, 0, dvec.y);
 282                                 if(constrain_walk_mesh(pos, &cam_pos)) {
 283                                         break;
 284                                 }
 285                                 theta += dtheta;
 286                         }
 287                 }
 288                 floor_y = cam_pos.y - user_eye_height;
 289         }
 290
 291         // calculate mouselook view matrix
 292         mouse_view_matrix = Mat4::identity;
 293         mouse_view_matrix.pre_translate(0, 0, -cam_dist);
 294         if(!have_headtracking) {
 295                 mouse_view_matrix.pre_rotate_x(deg_to_rad(cam_phi));
 296         }
 297         mouse_view_matrix.pre_rotate_y(deg_to_rad(cam_theta));
 298         mouse_view_matrix.pre_translate(-cam_pos.x, -cam_pos.y, -cam_pos.z);
 299
 300         // update hand-tracking
 301         if(have_handtracking) {
 302                 update_vrhands();
 303         }
 304 }
 305
 306 static void set_light(int idx, const Vec3 &pos, const Vec3 &color)
 307 {
 308         unsigned int lt = GL_LIGHT0 + idx;
 309         float posv[] = { pos.x, pos.y, pos.z, 1 };
 310         float colv[] = { color.x, color.y, color.z, 1 };
 311
 312         glEnable(lt);
 313         glLightfv(lt, GL_POSITION, posv);
 314         glLightfv(lt, GL_DIFFUSE, colv);
 315         glLightfv(lt, GL_SPECULAR, colv);
 316 }
 317
 318 void app_display()
 319 {
 320         float dt = (float)(time_msec - prev_msec) / 1000.0f;
 321         prev_msec = time_msec;
 322
 323         update(dt);
 324
 325         if(opt.vr) {
 326                 // VR mode
 327                 goatvr_draw_start();
 328                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 329
 330                 for(int i=0; i<2; i++) {
 331                         // for each eye
 332                         goatvr_draw_eye(i);
 333
 334                         proj_matrix = goatvr_projection_matrix(i, NEAR_CLIP, FAR_CLIP);
 335                         glMatrixMode(GL_PROJECTION);
 336                         glLoadMatrixf(proj_matrix[0]);
 337
 338                         view_matrix = mouse_view_matrix * Mat4(goatvr_view_matrix(i));
 339                         glMatrixMode(GL_MODELVIEW);
 340                         glLoadMatrixf(view_matrix[0]);
 341
 342                         draw_scene();
 343                         draw_vrhands();
 344                 }
 345                 goatvr_draw_done();
 346
 347                 if(should_swap) {
 348                         app_swap_buffers();
 349                 }
 350
 351         } else {
 352                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 353
 354                 proj_matrix.perspective(deg_to_rad(50.0), win_aspect, NEAR_CLIP, FAR_CLIP);
 355                 glMatrixMode(GL_PROJECTION);
 356                 glLoadMatrixf(proj_matrix[0]);
 357
 358                 view_matrix = mouse_view_matrix;
 359                 glMatrixMode(GL_MODELVIEW);
 360                 glLoadMatrixf(view_matrix[0]);
 361
 362                 draw_scene();
 363
 364                 if(!fb_srgb && sdr_post_gamma) {
 365                         slow_post(sdr_post_gamma);
 366                         glUseProgram(0);
 367                 }
 368                 app_swap_buffers();
 369         }
 370         assert(glGetError() == GL_NO_ERROR);
 371
 372         calc_framerate();
 373 }
 374
 375
 376 static void draw_scene()
 377 {
 378         static const Vec3 lpos[] = { Vec3(-50, 75, 100), Vec3(100, 0, 30), Vec3(-10, -10, 60) };
 379         set_light(0, lpos[0], Vec3(1.0, 0.8, 0.7) * 0.8);
 380         set_light(1, lpos[1], Vec3(0.6, 0.7, 1.0) * 0.6);
 381         set_light(2, lpos[2], Vec3(0.8, 1.0, 0.8) * 0.3);
 382
 383         rend->draw();
 384
 385         if(show_blobs) {
 386                 blobs->draw();
 387         }
 388
 389         if(show_walk_mesh && mscn->walk_mesh) {
 390                 glPushAttrib(GL_ENABLE_BIT);
 391                 glEnable(GL_BLEND);
 392                 glBlendFunc(GL_ONE, GL_ONE);
 393                 glDisable(GL_LIGHTING);
 394                 glEnable(GL_POLYGON_OFFSET_FILL);
 395
 396                 glUseProgram(0);
 397
 398                 glPolygonOffset(-1, 1);
 399                 glDepthMask(0);
 400
 401                 glColor3f(0.3, 0.08, 0.01);
 402                 mscn->walk_mesh->draw();
 403
 404                 glDepthMask(1);
 405
 406                 glPopAttrib();
 407         }
 408
 409         print_text(Vec2(9 * win_width / 10, 20), Vec3(1, 1, 0), "fps: %.1f", framerate);
 410         draw_ui();
 411 }
 412
 413
 414 void app_reshape(int x, int y)
 415 {
 416         glViewport(0, 0, x, y);
 417         goatvr_set_fb_size(x, y, 1.0f);
 418 }
 419
 420 void app_keyboard(int key, bool pressed)
 421 {
 422         unsigned int mod = app_get_modifiers();
 423
 424         if(pressed) {
 425                 switch(key) {
 426                 case 27:
 427                         app_quit();
 428                         break;
 429
 430                 case '\n':
 431                 case '\r':
 432                         if(mod & MOD_ALT) {
 433                                 app_toggle_fullscreen();
 434                         }
 435                         break;
 436
 437                 case '`':
 438                         app_toggle_grab_mouse();
 439                         show_message("mouse %s", app_is_mouse_grabbed() ? "grabbed" : "released");
 440                         break;
 441
 442                 case 'w':
 443                         if(mod & MOD_CTRL) {
 444                                 show_walk_mesh = !show_walk_mesh;
 445                                 show_message("walk mesh: %s", show_walk_mesh ? "on" : "off");
 446                         }
 447                         break;
 448
 449                 case 'c':
 450                         if(mod & MOD_CTRL) {
 451                                 noclip = !noclip;
 452                                 show_message(noclip ? "no clip" : "clip");
 453                         }
 454                         break;
 455
 456                 case 'f':
 457                         toggle_flight();
 458                         break;
 459
 460                 case 'p':
 461                         if(mod & MOD_CTRL) {
 462                                 fb_srgb = !fb_srgb;
 463                                 show_message("gamma correction for non-sRGB framebuffers: %s\n", fb_srgb ? "off" : "on");
 464                         }
 465                         break;
 466
 467                 case '=':
 468                         walk_speed *= 1.25;
 469                         show_message("walk speed: %g", walk_speed);
 470                         break;
 471
 472                 case '-':
 473                         walk_speed *= 0.75;
 474                         show_message("walk speed: %g", walk_speed);
 475                         break;
 476
 477                 case ']':
 478                         mouse_speed *= 1.2;
 479                         show_message("mouse speed: %g", mouse_speed);
 480                         break;
 481
 482                 case '[':
 483                         mouse_speed *= 0.8;
 484                         show_message("mouse speed: %g", mouse_speed);
 485                         break;
 486
 487                 case 'b':
 488                         show_blobs = !show_blobs;
 489                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 490                         break;
 491
 492                 case ' ':
 493                         goatvr_recenter();
 494                         show_message("VR recenter\n");
 495                         break;
 496                 }
 497         }
 498
 499         if(key < 256 && !(mod & (MOD_CTRL | MOD_ALT))) {
 500                 keystate[key] = pressed;
 501         }
 502 }
 503
 504 void app_mouse_button(int bn, bool pressed, int x, int y)
 505 {
 506         prev_mx = x;
 507         prev_my = y;
 508         bnstate[bn] = pressed;
 509 }
 510
 511 static inline void mouse_look(float dx, float dy)
 512 {
 513         float scrsz = (float)win_height;
 514         cam_theta += dx * 512.0 / scrsz;
 515         cam_phi += dy * 512.0 / scrsz;
 516
 517         if(cam_phi < -90) cam_phi = -90;
 518         if(cam_phi > 90) cam_phi = 90;
 519 }
 520
 521 static void mouse_zoom(float dx, float dy)
 522 {
 523         cam_dist += dy * 0.1;
 524         if(cam_dist < 0.0) cam_dist = 0.0;
 525 }
 526
 527 void app_mouse_motion(int x, int y)
 528 {
 529         int dx = x - prev_mx;
 530         int dy = y - prev_my;
 531         prev_mx = x;
 532         prev_my = y;
 533
 534         if(!dx && !dy) return;
 535
 536         if(bnstate[0]) {
 537                 mouse_look(dx, dy);
 538         }
 539         if(bnstate[2]) {
 540                 mouse_zoom(dx, dy);
 541         }
 542 }
 543
 544 void app_mouse_delta(int dx, int dy)
 545 {
 546         if(bnstate[2]) {
 547                 mouse_zoom(dx * mouse_speed, dy * mouse_speed);
 548         } else {
 549                 mouse_look(dx * mouse_speed, dy * mouse_speed);
 550         }
 551 }
 552
 553 void app_gamepad_axis(int axis, float val)
 554 {
 555         switch(axis) {
 556         case 0:
 557                 joy_move.x = val;
 558                 break;
 559         case 1:
 560                 joy_move.y = val;
 561                 break;
 562
 563         case 2:
 564                 joy_look.x = val;
 565                 break;
 566         case 3:
 567                 joy_look.y = val;
 568                 break;
 569         }
 570 }
 571
 572 void app_gamepad_button(int bn, bool pressed)
 573 {
 574         gpad_bnstate[bn] = pressed;
 575
 576         if(pressed) {
 577                 switch(bn) {
 578                 case GPAD_LSTICK:
 579                         toggle_flight();
 580                         break;
 581
 582                 case GPAD_X:
 583                         show_blobs = !show_blobs;
 584                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 585                         break;
 586
 587                 case GPAD_START:
 588                         goatvr_recenter();
 589                         show_message("VR recenter\n");
 590                         break;
 591
 592                 default:
 593                         break;
 594                 }
 595         }
 596 }
 597
 598 static void toggle_flight()
 599 {
 600         static float prev_walk_speed = -1.0;
 601         if(prev_walk_speed < 0.0) {
 602                 noclip = true;
 603                 prev_walk_speed = walk_speed;
 604                 walk_speed = 1000.0;
 605                 show_message("fly mode\n");
 606         } else {
 607                 noclip = false;
 608                 walk_speed = prev_walk_speed;
 609                 prev_walk_speed = -1.0;
 610                 show_message("walk mode\n");
 611         }
 612 }
 613
 614 static void calc_framerate()
 615 {
 616         static int ncalc;
 617         static int nframes;
 618         static long prev_upd;
 619
 620         long elapsed = time_msec - prev_upd;
 621         if(elapsed >= 1000) {
 622                 framerate = (float)nframes / (float)(elapsed * 0.001);
 623                 nframes = 1;
 624                 prev_upd = time_msec;
 625
 626                 /*if(++ncalc >= 5) {
 627                         printf("fps: %f\n", framerate);
 628                         ncalc = 0;
 629                 }*/
 630         } else {
 631                 ++nframes;
 632         }
 633 }