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