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