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 "exman.h"
  18 #include "blob_exhibit.h"
  19
  20 #define NEAR_CLIP       5.0
  21 #define FAR_CLIP        10000.0
  22
  23 static void draw_scene();
  24 static void toggle_flight();
  25 static void calc_framerate();
  26
  27 long time_msec;
  28 int win_width, win_height;
  29 float win_aspect;
  30 bool fb_srgb;
  31 bool opt_gear_wireframe;
  32
  33 TextureSet texman;
  34 SceneSet sceneman;
  35
  36 unsigned int sdr_ltmap, sdr_ltmap_notex;
  37
  38 static float cam_dist = 0.0;
  39 static float cam_theta, cam_phi;
  40 static Vec3 cam_pos;
  41 static float floor_y;   // last floor height
  42 static float user_eye_height = 165;
  43
  44 static float walk_speed = 300.0f;
  45 static float mouse_speed = 0.5f;
  46 static bool show_walk_mesh, noclip = false;
  47
  48 static bool have_headtracking, should_swap;
  49 static bool have_handtracking;
  50
  51 static struct {
  52         Vec3 pos;
  53         Quat rot;
  54         bool valid;
  55 } hand[2];
  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 static Renderer *rend;
  77
  78
  79 bool app_init(int argc, char **argv)
  80 {
  81         if(!init_options(argc, argv, "demo.conf")) {
  82                 return false;
  83         }
  84         app_resize(opt.width, opt.height);
  85         app_fullscreen(opt.fullscreen);
  86
  87         if(opt.vr) {
  88                 if(goatvr_init() == -1) {
  89                         return false;
  90                 }
  91                 goatvr_set_origin_mode(GOATVR_HEAD);
  92                 goatvr_set_units_scale(100.0f);
  93
  94                 goatvr_startvr();
  95                 should_swap = goatvr_should_swap() != 0;
  96                 user_eye_height = goatvr_get_eye_height();
  97                 have_headtracking = goatvr_have_headtracking();
  98                 have_handtracking = goatvr_have_handtracking();
  99
 100                 goatvr_recenter();
 101         }
 102
 103         int srgb_capable;
 104         glGetIntegerv(GL_FRAMEBUFFER_SRGB_CAPABLE_EXT, &srgb_capable);
 105         printf("Framebuffer %s sRGB-capable\n", srgb_capable ? "is" : "is not");
 106         fb_srgb = srgb_capable != 0;
 107         glEnable(GL_FRAMEBUFFER_SRGB);
 108
 109         glEnable(GL_MULTISAMPLE);
 110         glEnable(GL_DEPTH_TEST);
 111         glEnable(GL_CULL_FACE);
 112         glEnable(GL_LIGHTING);
 113         glEnable(GL_NORMALIZE);
 114
 115         Mesh::use_custom_sdr_attr = false;
 116
 117         float ambient[] = {0.0, 0.0, 0.0, 0.0};
 118         glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);
 119
 120         glClearColor(1, 1, 1, 1);
 121
 122         mscn = new MetaScene;
 123         if(!mscn->load(opt.scenefile ? opt.scenefile : "data/museum.scene")) {
 124                 return false;
 125         }
 126
 127         cam_pos = mscn->start_pos;
 128         Vec3 dir = rotate(Vec3(0, 0, 1), mscn->start_rot);
 129         dir.y = 0;
 130         cam_theta = rad_to_deg(acos(dot(dir, Vec3(0, 0, 1))));
 131
 132         exman = new ExhibitManager;
 133         if(!exman->load(mscn, "data/exhibits")) {
 134                 //return false;
 135         }
 136
 137         blobs = new BlobExhibit;
 138         blobs->node = new SceneNode;
 139         blobs->init();
 140         blobs->node->set_position(Vec3(-680, 160, -100));
 141         blobs->node->set_scaling(Vec3(28, 28, 28));
 142         blobs->node->update(0);
 143
 144         exman->add(blobs);
 145
 146         if(!(sdr_ltmap_notex = create_program_load("sdr/lightmap.v.glsl", "sdr/lightmap-notex.p.glsl"))) {
 147                 return false;
 148         }
 149         set_uniform_int(sdr_ltmap_notex, "texmap", MTL_TEX_DIFFUSE);
 150         set_uniform_int(sdr_ltmap_notex, "lightmap", MTL_TEX_LIGHTMAP);
 151
 152         if(!(sdr_ltmap = create_program_load("sdr/lightmap.v.glsl", "sdr/lightmap-tex.p.glsl"))) {
 153                 return false;
 154         }
 155         set_uniform_int(sdr_ltmap, "texmap", MTL_TEX_DIFFUSE);
 156         set_uniform_int(sdr_ltmap, "lightmap", MTL_TEX_LIGHTMAP);
 157
 158         if(!fb_srgb) {
 159                 sdr_post_gamma = create_program_load("sdr/post_gamma.v.glsl", "sdr/post_gamma.p.glsl");
 160         }
 161
 162         rend = new Renderer;
 163         rend->set_scene(mscn);
 164
 165         glUseProgram(0);
 166
 167         if(opt.vr || opt.fullscreen) {
 168                 app_grab_mouse(true);
 169         }
 170         return true;
 171 }
 172
 173 void app_cleanup()
 174 {
 175         app_grab_mouse(false);
 176         if(opt.vr) {
 177                 goatvr_shutdown();
 178         }
 179
 180         delete rend;
 181
 182         delete exman;
 183
 184         texman.clear();
 185         sceneman.clear();
 186 }
 187
 188 static bool constrain_walk_mesh(const Vec3 &v, Vec3 *newv)
 189 {
 190         Mesh *wm = mscn->walk_mesh;
 191         if(!wm) {
 192                 *newv = v;
 193                 return true;
 194         }
 195
 196         Ray downray = Ray(v, Vec3(0, -1, 0));
 197         HitPoint hit;
 198         if(mscn->walk_mesh->intersect(downray, &hit)) {
 199                 *newv = hit.pos;
 200                 newv->y += user_eye_height;
 201                 return true;
 202         }
 203         return false;
 204 }
 205
 206 static void update(float dt)
 207 {
 208         texman.update();
 209         sceneman.update();
 210
 211         mscn->update(dt);
 212         exman->update(dt);
 213
 214         float speed = walk_speed * dt;
 215         Vec3 dir;
 216
 217         // joystick
 218         float jdeadsq = joy_deadzone * joy_deadzone;
 219         float jmove_lensq = length_sq(joy_move);
 220         float jlook_lensq = length_sq(joy_look);
 221
 222         if(jmove_lensq > jdeadsq) {
 223                 float len = sqrt(jmove_lensq);
 224                 jmove_lensq -= jdeadsq;
 225
 226                 float mag = len * len;
 227                 dir.x += mag * joy_move.x / len * 2.0 * speed;
 228                 dir.z += mag * joy_move.y / len * 2.0 * speed;
 229         }
 230         if(jlook_lensq > jdeadsq) {
 231                 float len = sqrt(jlook_lensq);
 232                 jlook_lensq -= jdeadsq;
 233
 234                 float mag = len * len;
 235                 cam_theta += mag * joy_look.x / len * 200.0 * dt;
 236                 cam_phi += mag * joy_look.y / len * 100.0 * dt;
 237                 if(cam_phi < -90.0f) cam_phi = -90.0f;
 238                 if(cam_phi > 90.0f) cam_phi = 90.0f;
 239         }
 240
 241         // keyboard move
 242         if(keystate[(int)'w']) {
 243                 dir.z -= speed;
 244         }
 245         if(keystate[(int)'s']) {
 246                 dir.z += speed;
 247         }
 248         if(keystate[(int)'d']) {
 249                 dir.x += speed;
 250         }
 251         if(keystate[(int)'a']) {
 252                 dir.x -= speed;
 253         }
 254         if(keystate[(int)'q'] || gpad_bnstate[GPAD_UP]) {
 255                 cam_pos.y += speed;
 256         }
 257         if(keystate[(int)'z'] || gpad_bnstate[GPAD_DOWN]) {
 258                 cam_pos.y -= speed;
 259         }
 260
 261         float theta = M_PI * cam_theta / 180.0f;
 262         Vec3 newpos;
 263         newpos.x = cam_pos.x + cos(theta) * dir.x - sin(theta) * dir.z;
 264         newpos.y = cam_pos.y;
 265         newpos.z = cam_pos.z + sin(theta) * dir.x + cos(theta) * dir.z;
 266
 267         if(noclip) {
 268                 cam_pos = newpos;
 269         } else {
 270                 if(!constrain_walk_mesh(newpos, &cam_pos)) {
 271                         float dtheta = M_PI / 32.0;
 272                         float theta = dtheta;
 273                         Vec2 dir2d = newpos.xz() - cam_pos.xz();
 274
 275                         for(int i=0; i<16; i++) {
 276                                 Vec2 dvec = rotate(dir2d, theta);
 277                                 Vec3 pos = cam_pos + Vec3(dvec.x, 0, dvec.y);
 278                                 if(constrain_walk_mesh(pos, &cam_pos)) {
 279                                         break;
 280                                 }
 281                                 dvec = rotate(dir2d, -theta);
 282                                 pos = cam_pos + Vec3(dvec.x, 0, dvec.y);
 283                                 if(constrain_walk_mesh(pos, &cam_pos)) {
 284                                         break;
 285                                 }
 286                                 theta += dtheta;
 287                         }
 288                 }
 289                 floor_y = cam_pos.y - user_eye_height;
 290         }
 291
 292         // calculate mouselook view matrix
 293         mouse_view_matrix = Mat4::identity;
 294         mouse_view_matrix.pre_translate(0, 0, -cam_dist);
 295         if(!have_headtracking) {
 296                 mouse_view_matrix.pre_rotate_x(deg_to_rad(cam_phi));
 297         }
 298         mouse_view_matrix.pre_rotate_y(deg_to_rad(cam_theta));
 299         mouse_view_matrix.pre_translate(-cam_pos.x, -cam_pos.y, -cam_pos.z);
 300
 301         if(have_handtracking) {
 302                 for(int i=0; i<2; i++) {
 303                         if(goatvr_hand_active(i)) {
 304                                 goatvr_hand_position(i, &hand[i].pos.x);
 305                                 goatvr_hand_orientation(i, &hand[i].rot.x);
 306                                 hand[i].valid = true;
 307                         } else {
 308                                 hand[i].valid = false;
 309                         }
 310                 }
 311         }
 312 }
 313
 314 static void set_light(int idx, const Vec3 &pos, const Vec3 &color)
 315 {
 316         unsigned int lt = GL_LIGHT0 + idx;
 317         float posv[] = { pos.x, pos.y, pos.z, 1 };
 318         float colv[] = { color.x, color.y, color.z, 1 };
 319
 320         glEnable(lt);
 321         glLightfv(lt, GL_POSITION, posv);
 322         glLightfv(lt, GL_DIFFUSE, colv);
 323         glLightfv(lt, GL_SPECULAR, colv);
 324 }
 325
 326 void app_display()
 327 {
 328         float dt = (float)(time_msec - prev_msec) / 1000.0f;
 329         prev_msec = time_msec;
 330
 331         if(opt.vr) {
 332                 // VR mode
 333                 goatvr_draw_start();
 334                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 335
 336                 update(dt);
 337
 338                 for(int i=0; i<2; i++) {
 339                         // for each eye
 340                         goatvr_draw_eye(i);
 341
 342                         proj_matrix = goatvr_projection_matrix(i, NEAR_CLIP, FAR_CLIP);
 343                         glMatrixMode(GL_PROJECTION);
 344                         glLoadMatrixf(proj_matrix[0]);
 345
 346                         view_matrix = mouse_view_matrix * Mat4(goatvr_view_matrix(i));
 347                         glMatrixMode(GL_MODELVIEW);
 348                         glLoadMatrixf(view_matrix[0]);
 349
 350                         draw_scene();
 351                 }
 352                 goatvr_draw_done();
 353
 354                 if(should_swap) {
 355                         app_swap_buffers();
 356                 }
 357
 358         } else {
 359                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 360
 361                 update(dt);
 362
 363                 proj_matrix.perspective(deg_to_rad(50.0), win_aspect, NEAR_CLIP, FAR_CLIP);
 364                 glMatrixMode(GL_PROJECTION);
 365                 glLoadMatrixf(proj_matrix[0]);
 366
 367                 view_matrix = mouse_view_matrix;
 368                 glMatrixMode(GL_MODELVIEW);
 369                 glLoadMatrixf(view_matrix[0]);
 370
 371                 draw_scene();
 372
 373                 if(!fb_srgb && sdr_post_gamma) {
 374                         slow_post(sdr_post_gamma);
 375                         glUseProgram(0);
 376                 }
 377                 app_swap_buffers();
 378         }
 379         assert(glGetError() == GL_NO_ERROR);
 380
 381         calc_framerate();
 382 }
 383
 384
 385 static void draw_scene()
 386 {
 387         static const Vec3 lpos[] = { Vec3(-50, 75, 100), Vec3(100, 0, 30), Vec3(-10, -10, 60) };
 388         set_light(0, lpos[0], Vec3(1.0, 0.8, 0.7) * 0.8);
 389         set_light(1, lpos[1], Vec3(0.6, 0.7, 1.0) * 0.6);
 390         set_light(2, lpos[2], Vec3(0.8, 1.0, 0.8) * 0.3);
 391
 392         rend->draw();
 393
 394         if(show_blobs) {
 395                 blobs->draw();
 396         }
 397
 398         if(have_handtracking) {
 399                 Mat4 head_xform = inverse(mouse_view_matrix);//goatvr_head_matrix();
 400                 Mat4 head_dir_xform = head_xform.upper3x3();
 401
 402                 glUseProgram(0);
 403                 glPushAttrib(GL_ENABLE_BIT);
 404                 glDisable(GL_LIGHTING);
 405                 glBegin(GL_LINES);
 406                 for(int i=0; i<2; i++) {
 407                         if(hand[i].valid) {
 408                                 glColor3f(i, 1 - i, i);
 409                         } else {
 410                                 glColor3f(0.5, 0.5, 0.5);
 411                         }
 412                         Vec3 v = head_xform * hand[i].pos;
 413                         Vec3 dir = head_dir_xform * rotate(Vec3(0, 0, -1), hand[i].rot) * 20.0f;
 414                         Vec3 up = head_dir_xform * rotate(Vec3(0, 1, 0), hand[i].rot) * 10.0f;
 415                         Vec3 right = head_dir_xform * rotate(Vec3(1, 0, 0), hand[i].rot) * 10.0f;
 416
 417                         glVertex3f(v.x, v.y, v.z);
 418                         glVertex3f(v.x + dir.x, v.y + dir.y, v.z + dir.z);
 419                         glVertex3f(v.x - right.x, v.y - right.y, v.z - right.z);
 420                         glVertex3f(v.x + right.x, v.y + right.y, v.z + right.z);
 421                         glVertex3f(v.x - up.x, v.y - up.y, v.z - up.z);
 422                         glVertex3f(v.x + up.x, v.y + up.y, v.z + up.z);
 423                 }
 424                 glEnd();
 425                 glPopAttrib();
 426         }
 427
 428         if(show_walk_mesh && mscn->walk_mesh) {
 429                 glPushAttrib(GL_ENABLE_BIT);
 430                 glEnable(GL_BLEND);
 431                 glBlendFunc(GL_ONE, GL_ONE);
 432                 glDisable(GL_LIGHTING);
 433                 glEnable(GL_POLYGON_OFFSET_FILL);
 434
 435                 glUseProgram(0);
 436
 437                 glPolygonOffset(-1, 1);
 438                 glDepthMask(0);
 439
 440                 glColor3f(0.3, 0.08, 0.01);
 441                 mscn->walk_mesh->draw();
 442
 443                 glDepthMask(1);
 444
 445                 glPopAttrib();
 446         }
 447
 448         print_text(Vec2(9 * win_width / 10, 20), Vec3(1, 1, 0), "fps: %.1f", framerate);
 449         draw_ui();
 450 }
 451
 452
 453 void app_reshape(int x, int y)
 454 {
 455         glViewport(0, 0, x, y);
 456         goatvr_set_fb_size(x, y, 1.0f);
 457 }
 458
 459 void app_keyboard(int key, bool pressed)
 460 {
 461         unsigned int mod = app_get_modifiers();
 462
 463         if(pressed) {
 464                 switch(key) {
 465                 case 27:
 466                         app_quit();
 467                         break;
 468
 469                 case '\n':
 470                 case '\r':
 471                         if(mod & MOD_ALT) {
 472                                 app_toggle_fullscreen();
 473                         }
 474                         break;
 475
 476                 case '`':
 477                         app_toggle_grab_mouse();
 478                         show_message("mouse %s", app_is_mouse_grabbed() ? "grabbed" : "released");
 479                         break;
 480
 481                 case 'w':
 482                         if(mod & MOD_CTRL) {
 483                                 show_walk_mesh = !show_walk_mesh;
 484                                 show_message("walk mesh: %s", show_walk_mesh ? "on" : "off");
 485                         }
 486                         break;
 487
 488                 case 'c':
 489                         if(mod & MOD_CTRL) {
 490                                 noclip = !noclip;
 491                                 show_message(noclip ? "no clip" : "clip");
 492                         }
 493                         break;
 494
 495                 case 'f':
 496                         toggle_flight();
 497                         break;
 498
 499                 case 'p':
 500                         if(mod & MOD_CTRL) {
 501                                 fb_srgb = !fb_srgb;
 502                                 show_message("gamma correction for non-sRGB framebuffers: %s\n", fb_srgb ? "off" : "on");
 503                         }
 504                         break;
 505
 506                 case '=':
 507                         walk_speed *= 1.25;
 508                         show_message("walk speed: %g", walk_speed);
 509                         break;
 510
 511                 case '-':
 512                         walk_speed *= 0.75;
 513                         show_message("walk speed: %g", walk_speed);
 514                         break;
 515
 516                 case ']':
 517                         mouse_speed *= 1.2;
 518                         show_message("mouse speed: %g", mouse_speed);
 519                         break;
 520
 521                 case '[':
 522                         mouse_speed *= 0.8;
 523                         show_message("mouse speed: %g", mouse_speed);
 524                         break;
 525
 526                 case 'b':
 527                         show_blobs = !show_blobs;
 528                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 529                         break;
 530
 531                 case ' ':
 532                         goatvr_recenter();
 533                         show_message("VR recenter\n");
 534                         break;
 535                 }
 536         }
 537
 538         if(key < 256 && !(mod & (MOD_CTRL | MOD_ALT))) {
 539                 keystate[key] = pressed;
 540         }
 541 }
 542
 543 void app_mouse_button(int bn, bool pressed, int x, int y)
 544 {
 545         prev_mx = x;
 546         prev_my = y;
 547         bnstate[bn] = pressed;
 548 }
 549
 550 static inline void mouse_look(float dx, float dy)
 551 {
 552         float scrsz = (float)win_height;
 553         cam_theta += dx * 512.0 / scrsz;
 554         cam_phi += dy * 512.0 / scrsz;
 555
 556         if(cam_phi < -90) cam_phi = -90;
 557         if(cam_phi > 90) cam_phi = 90;
 558 }
 559
 560 static void mouse_zoom(float dx, float dy)
 561 {
 562         cam_dist += dy * 0.1;
 563         if(cam_dist < 0.0) cam_dist = 0.0;
 564 }
 565
 566 void app_mouse_motion(int x, int y)
 567 {
 568         int dx = x - prev_mx;
 569         int dy = y - prev_my;
 570         prev_mx = x;
 571         prev_my = y;
 572
 573         if(!dx && !dy) return;
 574
 575         if(bnstate[0]) {
 576                 mouse_look(dx, dy);
 577         }
 578         if(bnstate[2]) {
 579                 mouse_zoom(dx, dy);
 580         }
 581 }
 582
 583 void app_mouse_delta(int dx, int dy)
 584 {
 585         if(bnstate[2]) {
 586                 mouse_zoom(dx * mouse_speed, dy * mouse_speed);
 587         } else {
 588                 mouse_look(dx * mouse_speed, dy * mouse_speed);
 589         }
 590 }
 591
 592 void app_gamepad_axis(int axis, float val)
 593 {
 594         switch(axis) {
 595         case 0:
 596                 joy_move.x = val;
 597                 break;
 598         case 1:
 599                 joy_move.y = val;
 600                 break;
 601
 602         case 2:
 603                 joy_look.x = val;
 604                 break;
 605         case 3:
 606                 joy_look.y = val;
 607                 break;
 608         }
 609 }
 610
 611 void app_gamepad_button(int bn, bool pressed)
 612 {
 613         gpad_bnstate[bn] = pressed;
 614
 615         if(pressed) {
 616                 switch(bn) {
 617                 case GPAD_LSTICK:
 618                         toggle_flight();
 619                         break;
 620
 621                 case GPAD_X:
 622                         show_blobs = !show_blobs;
 623                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 624                         break;
 625
 626                 case GPAD_START:
 627                         goatvr_recenter();
 628                         show_message("VR recenter\n");
 629                         break;
 630
 631                 default:
 632                         break;
 633                 }
 634         }
 635 }
 636
 637 static void toggle_flight()
 638 {
 639         static float prev_walk_speed = -1.0;
 640         if(prev_walk_speed < 0.0) {
 641                 noclip = true;
 642                 prev_walk_speed = walk_speed;
 643                 walk_speed = 1000.0;
 644                 show_message("fly mode\n");
 645         } else {
 646                 noclip = false;
 647                 walk_speed = prev_walk_speed;
 648                 prev_walk_speed = -1.0;
 649                 show_message("walk mode\n");
 650         }
 651 }
 652
 653 static void calc_framerate()
 654 {
 655         static int ncalc;
 656         static int nframes;
 657         static long prev_upd;
 658
 659         long elapsed = time_msec - prev_upd;
 660         if(elapsed >= 1000) {
 661                 framerate = (float)nframes / (float)(elapsed * 0.001);
 662                 nframes = 1;
 663                 prev_upd = time_msec;
 664
 665                 /*if(++ncalc >= 5) {
 666                         printf("fps: %f\n", framerate);
 667                         ncalc = 0;
 668                 }*/
 669         } else {
 670                 ++nframes;
 671         }
 672 }