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