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 "blob_exhibit.h"
  17
  18 #define NEAR_CLIP       5.0
  19 #define FAR_CLIP        10000.0
  20
  21 static void draw_scene();
  22 static void toggle_flight();
  23 static void calc_framerate();
  24
  25 long time_msec;
  26 int win_width, win_height;
  27 float win_aspect;
  28 bool fb_srgb;
  29 bool opt_gear_wireframe;
  30
  31 TextureSet texman;
  32 SceneSet sceneman;
  33
  34 unsigned int sdr_ltmap, sdr_ltmap_notex;
  35
  36 static float cam_dist = 0.0;
  37 static float cam_theta, cam_phi;
  38 static Vec3 cam_pos;
  39 static float floor_y;   // last floor height
  40 static float user_eye_height = 165;
  41
  42 static float walk_speed = 300.0f;
  43 static float mouse_speed = 0.5f;
  44 static bool show_walk_mesh, noclip = false;
  45
  46 static bool have_headtracking, should_swap;
  47
  48 static int prev_mx, prev_my;
  49 static bool bnstate[8];
  50 static bool keystate[256];
  51 static bool gpad_bnstate[64];
  52 static Vec2 joy_move, joy_look;
  53 static float joy_deadzone = 0.01;
  54
  55 static float framerate;
  56
  57 static Mat4 view_matrix, mouse_view_matrix, proj_matrix;
  58 static MetaScene *mscn;
  59 static unsigned int sdr_post_gamma;
  60
  61 static long prev_msec;
  62
  63 static BlobExhibit *blobs;
  64 static bool show_blobs;
  65
  66
  67 bool app_init(int argc, char **argv)
  68 {
  69         if(!init_options(argc, argv, "demo.conf")) {
  70                 return false;
  71         }
  72         app_resize(opt.width, opt.height);
  73         app_fullscreen(opt.fullscreen);
  74
  75         if(opt.vr) {
  76                 if(goatvr_init() == -1) {
  77                         return false;
  78                 }
  79                 goatvr_set_origin_mode(GOATVR_HEAD);
  80                 goatvr_set_units_scale(100.0f);
  81
  82                 goatvr_startvr();
  83                 should_swap = goatvr_should_swap() != 0;
  84                 user_eye_height = goatvr_get_eye_height();
  85                 have_headtracking = goatvr_have_headtracking();
  86
  87                 goatvr_recenter();
  88         }
  89
  90         int srgb_capable;
  91         glGetIntegerv(GL_FRAMEBUFFER_SRGB_CAPABLE_EXT, &srgb_capable);
  92         printf("Framebuffer %s sRGB-capable\n", srgb_capable ? "is" : "is not");
  93         fb_srgb = srgb_capable != 0;
  94         glEnable(GL_FRAMEBUFFER_SRGB);
  95
  96         glEnable(GL_MULTISAMPLE);
  97         glEnable(GL_DEPTH_TEST);
  98         glEnable(GL_CULL_FACE);
  99         glEnable(GL_LIGHTING);
 100         glEnable(GL_NORMALIZE);
 101
 102         Mesh::use_custom_sdr_attr = false;
 103
 104         float ambient[] = {0.0, 0.0, 0.0, 0.0};
 105         glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);
 106
 107         glClearColor(1, 1, 1, 1);
 108
 109         mscn = new MetaScene;
 110         if(!mscn->load(opt.scenefile ? opt.scenefile : "data/museum.scene")) {
 111                 return false;
 112         }
 113
 114         cam_pos = mscn->start_pos;
 115         Vec3 dir = rotate(Vec3(0, 0, 1), mscn->start_rot);
 116         dir.y = 0;
 117         cam_theta = rad_to_deg(acos(dot(dir, Vec3(0, 0, 1))));
 118
 119         blobs = new BlobExhibit;
 120         blobs->node = new SceneNode;
 121         blobs->init();
 122         blobs->node->set_position(Vec3(-680, 160, -100));
 123         blobs->node->set_scaling(Vec3(28, 28, 28));
 124         blobs->node->update(0);
 125
 126         if(!(sdr_ltmap_notex = create_program_load("sdr/lightmap.v.glsl", "sdr/lightmap-notex.p.glsl"))) {
 127                 return false;
 128         }
 129         set_uniform_int(sdr_ltmap_notex, "texmap", MTL_TEX_DIFFUSE);
 130         set_uniform_int(sdr_ltmap_notex, "lightmap", MTL_TEX_LIGHTMAP);
 131
 132         if(!(sdr_ltmap = create_program_load("sdr/lightmap.v.glsl", "sdr/lightmap-tex.p.glsl"))) {
 133                 return false;
 134         }
 135         set_uniform_int(sdr_ltmap, "texmap", MTL_TEX_DIFFUSE);
 136         set_uniform_int(sdr_ltmap, "lightmap", MTL_TEX_LIGHTMAP);
 137
 138         if(!fb_srgb) {
 139                 sdr_post_gamma = create_program_load("sdr/post_gamma.v.glsl", "sdr/post_gamma.p.glsl");
 140         }
 141
 142         glUseProgram(0);
 143
 144         if(opt.vr || opt.fullscreen) {
 145                 app_grab_mouse(true);
 146         }
 147         return true;
 148 }
 149
 150 void app_cleanup()
 151 {
 152         app_grab_mouse(false);
 153         if(opt.vr) {
 154                 goatvr_shutdown();
 155         }
 156
 157         blobs->destroy();
 158         delete blobs->node;
 159         delete blobs;
 160
 161         texman.clear();
 162         sceneman.clear();
 163 }
 164
 165 static bool constrain_walk_mesh(const Vec3 &v, Vec3 *newv)
 166 {
 167         Mesh *wm = mscn->walk_mesh;
 168         if(!wm) {
 169                 *newv = v;
 170                 return true;
 171         }
 172
 173         Ray downray = Ray(v, Vec3(0, -1, 0));
 174         HitPoint hit;
 175         if(mscn->walk_mesh->intersect(downray, &hit)) {
 176                 *newv = hit.pos;
 177                 newv->y += user_eye_height;
 178                 return true;
 179         }
 180         return false;
 181 }
 182
 183 static void update(float dt)
 184 {
 185         texman.update();
 186         sceneman.update();
 187
 188         mscn->update(dt);
 189         if(show_blobs) {
 190                 blobs->update(dt);
 191         }
 192
 193         float speed = walk_speed * dt;
 194         Vec3 dir;
 195
 196         // joystick
 197         float jdeadsq = joy_deadzone * joy_deadzone;
 198         float jmove_lensq = length_sq(joy_move);
 199         float jlook_lensq = length_sq(joy_look);
 200
 201         if(jmove_lensq > jdeadsq) {
 202                 float len = sqrt(jmove_lensq);
 203                 jmove_lensq -= jdeadsq;
 204
 205                 float mag = len * len;
 206                 dir.x += mag * joy_move.x / len * 2.0 * speed;
 207                 dir.z += mag * joy_move.y / len * 2.0 * speed;
 208         }
 209         if(jlook_lensq > jdeadsq) {
 210                 float len = sqrt(jlook_lensq);
 211                 jlook_lensq -= jdeadsq;
 212
 213                 float mag = len * len;
 214                 cam_theta += mag * joy_look.x / len * 200.0 * dt;
 215                 cam_phi += mag * joy_look.y / len * 100.0 * dt;
 216                 if(cam_phi < -90.0f) cam_phi = -90.0f;
 217                 if(cam_phi > 90.0f) cam_phi = 90.0f;
 218         }
 219
 220         // keyboard move
 221         if(keystate[(int)'w']) {
 222                 dir.z -= speed;
 223         }
 224         if(keystate[(int)'s']) {
 225                 dir.z += speed;
 226         }
 227         if(keystate[(int)'d']) {
 228                 dir.x += speed;
 229         }
 230         if(keystate[(int)'a']) {
 231                 dir.x -= speed;
 232         }
 233         if(keystate[(int)'q'] || gpad_bnstate[GPAD_UP]) {
 234                 cam_pos.y += speed;
 235         }
 236         if(keystate[(int)'z'] || gpad_bnstate[GPAD_DOWN]) {
 237                 cam_pos.y -= speed;
 238         }
 239
 240         float theta = M_PI * cam_theta / 180.0f;
 241         Vec3 newpos;
 242         newpos.x = cam_pos.x + cos(theta) * dir.x - sin(theta) * dir.z;
 243         newpos.y = cam_pos.y;
 244         newpos.z = cam_pos.z + sin(theta) * dir.x + cos(theta) * dir.z;
 245
 246         if(noclip) {
 247                 cam_pos = newpos;
 248         } else {
 249                 if(!constrain_walk_mesh(newpos, &cam_pos)) {
 250                         float dtheta = M_PI / 32.0;
 251                         float theta = dtheta;
 252                         Vec2 dir2d = newpos.xz() - cam_pos.xz();
 253
 254                         for(int i=0; i<16; i++) {
 255                                 Vec2 dvec = rotate(dir2d, theta);
 256                                 Vec3 pos = cam_pos + Vec3(dvec.x, 0, dvec.y);
 257                                 if(constrain_walk_mesh(pos, &cam_pos)) {
 258                                         break;
 259                                 }
 260                                 dvec = rotate(dir2d, -theta);
 261                                 pos = cam_pos + Vec3(dvec.x, 0, dvec.y);
 262                                 if(constrain_walk_mesh(pos, &cam_pos)) {
 263                                         break;
 264                                 }
 265                                 theta += dtheta;
 266                         }
 267                 }
 268                 floor_y = cam_pos.y - user_eye_height;
 269         }
 270
 271         // calculate mouselook view matrix
 272         mouse_view_matrix = Mat4::identity;
 273         mouse_view_matrix.pre_translate(0, 0, -cam_dist);
 274         if(!have_headtracking) {
 275                 mouse_view_matrix.pre_rotate_x(deg_to_rad(cam_phi));
 276         }
 277         mouse_view_matrix.pre_rotate_y(deg_to_rad(cam_theta));
 278         mouse_view_matrix.pre_translate(-cam_pos.x, -cam_pos.y, -cam_pos.z);
 279 }
 280
 281 static void set_light(int idx, const Vec3 &pos, const Vec3 &color)
 282 {
 283         unsigned int lt = GL_LIGHT0 + idx;
 284         float posv[] = { pos.x, pos.y, pos.z, 1 };
 285         float colv[] = { color.x, color.y, color.z, 1 };
 286
 287         glEnable(lt);
 288         glLightfv(lt, GL_POSITION, posv);
 289         glLightfv(lt, GL_DIFFUSE, colv);
 290         glLightfv(lt, GL_SPECULAR, colv);
 291 }
 292
 293 void app_display()
 294 {
 295         float dt = (float)(time_msec - prev_msec) / 1000.0f;
 296         prev_msec = time_msec;
 297
 298         update(dt);
 299
 300         if(opt.vr) {
 301                 // VR mode
 302                 goatvr_draw_start();
 303                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 304
 305                 for(int i=0; i<2; i++) {
 306                         // for each eye
 307                         goatvr_draw_eye(i);
 308
 309                         proj_matrix = goatvr_projection_matrix(i, NEAR_CLIP, FAR_CLIP);
 310                         glMatrixMode(GL_PROJECTION);
 311                         glLoadMatrixf(proj_matrix[0]);
 312
 313                         view_matrix = mouse_view_matrix * Mat4(goatvr_view_matrix(i));
 314                         glMatrixMode(GL_MODELVIEW);
 315                         glLoadMatrixf(view_matrix[0]);
 316
 317                         draw_scene();
 318                 }
 319                 goatvr_draw_done();
 320
 321                 if(should_swap) {
 322                         app_swap_buffers();
 323                 }
 324
 325         } else {
 326                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 327
 328                 proj_matrix.perspective(deg_to_rad(50.0), win_aspect, NEAR_CLIP, FAR_CLIP);
 329                 glMatrixMode(GL_PROJECTION);
 330                 glLoadMatrixf(proj_matrix[0]);
 331
 332                 view_matrix = mouse_view_matrix;
 333                 glMatrixMode(GL_MODELVIEW);
 334                 glLoadMatrixf(view_matrix[0]);
 335
 336                 draw_scene();
 337
 338                 if(!fb_srgb && sdr_post_gamma) {
 339                         slow_post(sdr_post_gamma);
 340                         glUseProgram(0);
 341                 }
 342                 app_swap_buffers();
 343         }
 344         assert(glGetError() == GL_NO_ERROR);
 345
 346         calc_framerate();
 347 }
 348
 349
 350 static void draw_scene()
 351 {
 352         static const Vec3 lpos[] = { Vec3(-50, 75, 100), Vec3(100, 0, 30), Vec3(-10, -10, 60) };
 353         set_light(0, lpos[0], Vec3(1.0, 0.8, 0.7) * 0.8);
 354         set_light(1, lpos[1], Vec3(0.6, 0.7, 1.0) * 0.6);
 355         set_light(2, lpos[2], Vec3(0.8, 1.0, 0.8) * 0.3);
 356
 357         mscn->draw();
 358         if(show_blobs) {
 359                 blobs->draw();
 360         }
 361
 362         if(show_walk_mesh && mscn->walk_mesh) {
 363                 glPushAttrib(GL_ENABLE_BIT);
 364                 glEnable(GL_BLEND);
 365                 glBlendFunc(GL_ONE, GL_ONE);
 366                 glDisable(GL_LIGHTING);
 367                 glEnable(GL_POLYGON_OFFSET_FILL);
 368
 369                 glUseProgram(0);
 370
 371                 glPolygonOffset(-1, 1);
 372                 glDepthMask(0);
 373
 374                 glColor3f(0.3, 0.08, 0.01);
 375                 mscn->walk_mesh->draw();
 376
 377                 glDepthMask(1);
 378
 379                 glPopAttrib();
 380         }
 381
 382         print_text(Vec2(9 * win_width / 10, 20), Vec3(1, 1, 0), "fps: %.1f", framerate);
 383         draw_ui();
 384 }
 385
 386
 387 void app_reshape(int x, int y)
 388 {
 389         glViewport(0, 0, x, y);
 390         goatvr_set_fb_size(x, y, 1.0f);
 391 }
 392
 393 void app_keyboard(int key, bool pressed)
 394 {
 395         unsigned int mod = app_get_modifiers();
 396
 397         if(pressed) {
 398                 switch(key) {
 399                 case 27:
 400                         app_quit();
 401                         break;
 402
 403                 case '\n':
 404                 case '\r':
 405                         if(mod & MOD_ALT) {
 406                                 app_toggle_fullscreen();
 407                         }
 408                         break;
 409
 410                 case '`':
 411                         app_toggle_grab_mouse();
 412                         show_message("mouse %s", app_is_mouse_grabbed() ? "grabbed" : "released");
 413                         break;
 414
 415                 case 'w':
 416                         if(mod & MOD_CTRL) {
 417                                 show_walk_mesh = !show_walk_mesh;
 418                                 show_message("walk mesh: %s", show_walk_mesh ? "on" : "off");
 419                         }
 420                         break;
 421
 422                 case 'c':
 423                         if(mod & MOD_CTRL) {
 424                                 noclip = !noclip;
 425                                 show_message(noclip ? "no clip" : "clip");
 426                         }
 427                         break;
 428
 429                 case 'f':
 430                         toggle_flight();
 431                         break;
 432
 433                 case 'p':
 434                         if(mod & MOD_CTRL) {
 435                                 fb_srgb = !fb_srgb;
 436                                 show_message("gamma correction for non-sRGB framebuffers: %s\n", fb_srgb ? "off" : "on");
 437                         }
 438                         break;
 439
 440                 case '=':
 441                         walk_speed *= 1.25;
 442                         show_message("walk speed: %g", walk_speed);
 443                         break;
 444
 445                 case '-':
 446                         walk_speed *= 0.75;
 447                         show_message("walk speed: %g", walk_speed);
 448                         break;
 449
 450                 case ']':
 451                         mouse_speed *= 1.2;
 452                         show_message("mouse speed: %g", mouse_speed);
 453                         break;
 454
 455                 case '[':
 456                         mouse_speed *= 0.8;
 457                         show_message("mouse speed: %g", mouse_speed);
 458                         break;
 459
 460                 case 'b':
 461                         show_blobs = !show_blobs;
 462                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 463                         break;
 464
 465                 case ' ':
 466                         goatvr_recenter();
 467                         show_message("VR recenter\n");
 468                         break;
 469                 }
 470         }
 471
 472         if(key < 256 && !(mod & (MOD_CTRL | MOD_ALT))) {
 473                 keystate[key] = pressed;
 474         }
 475 }
 476
 477 void app_mouse_button(int bn, bool pressed, int x, int y)
 478 {
 479         prev_mx = x;
 480         prev_my = y;
 481         bnstate[bn] = pressed;
 482 }
 483
 484 static inline void mouse_look(float dx, float dy)
 485 {
 486         float scrsz = (float)win_height;
 487         cam_theta += dx * 512.0 / scrsz;
 488         cam_phi += dy * 512.0 / scrsz;
 489
 490         if(cam_phi < -90) cam_phi = -90;
 491         if(cam_phi > 90) cam_phi = 90;
 492 }
 493
 494 static void mouse_zoom(float dx, float dy)
 495 {
 496         cam_dist += dy * 0.1;
 497         if(cam_dist < 0.0) cam_dist = 0.0;
 498 }
 499
 500 void app_mouse_motion(int x, int y)
 501 {
 502         int dx = x - prev_mx;
 503         int dy = y - prev_my;
 504         prev_mx = x;
 505         prev_my = y;
 506
 507         if(!dx && !dy) return;
 508
 509         if(bnstate[0]) {
 510                 mouse_look(dx, dy);
 511         }
 512         if(bnstate[2]) {
 513                 mouse_zoom(dx, dy);
 514         }
 515 }
 516
 517 void app_mouse_delta(int dx, int dy)
 518 {
 519         if(bnstate[2]) {
 520                 mouse_zoom(dx * mouse_speed, dy * mouse_speed);
 521         } else {
 522                 mouse_look(dx * mouse_speed, dy * mouse_speed);
 523         }
 524 }
 525
 526 void app_gamepad_axis(int axis, float val)
 527 {
 528         switch(axis) {
 529         case 0:
 530                 joy_move.x = val;
 531                 break;
 532         case 1:
 533                 joy_move.y = val;
 534                 break;
 535
 536         case 2:
 537                 joy_look.x = val;
 538                 break;
 539         case 3:
 540                 joy_look.y = val;
 541                 break;
 542         }
 543 }
 544
 545 void app_gamepad_button(int bn, bool pressed)
 546 {
 547         gpad_bnstate[bn] = pressed;
 548
 549         if(pressed) {
 550                 switch(bn) {
 551                 case GPAD_LSTICK:
 552                         toggle_flight();
 553                         break;
 554
 555                 case GPAD_X:
 556                         show_blobs = !show_blobs;
 557                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 558                         break;
 559
 560                 case GPAD_START:
 561                         goatvr_recenter();
 562                         show_message("VR recenter\n");
 563                         break;
 564
 565                 default:
 566                         break;
 567                 }
 568         }
 569 }
 570
 571 static void toggle_flight()
 572 {
 573         static float prev_walk_speed = -1.0;
 574         if(prev_walk_speed < 0.0) {
 575                 noclip = true;
 576                 prev_walk_speed = walk_speed;
 577                 walk_speed = 1000.0;
 578                 show_message("fly mode\n");
 579         } else {
 580                 noclip = false;
 581                 walk_speed = prev_walk_speed;
 582                 prev_walk_speed = -1.0;
 583                 show_message("walk mode\n");
 584         }
 585 }
 586
 587 static void calc_framerate()
 588 {
 589         static int ncalc;
 590         static int nframes;
 591         static long prev_upd;
 592
 593         long elapsed = time_msec - prev_upd;
 594         if(elapsed >= 1000) {
 595                 framerate = (float)nframes / (float)(elapsed * 0.001);
 596                 nframes = 1;
 597                 prev_upd = time_msec;
 598
 599                 /*if(++ncalc >= 5) {
 600                         printf("fps: %f\n", framerate);
 601                         ncalc = 0;
 602                 }*/
 603         } else {
 604                 ++nframes;
 605         }
 606 }