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(0.2, 0.2, 0.2, 1.0);
 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(-250, 150, 250));
 123         blobs->node->set_scaling(Vec3(20, 20, 20));
 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
 130         if(!(sdr_ltmap = create_program_load("sdr/lightmap.v.glsl", "sdr/lightmap-tex.p.glsl"))) {
 131                 return false;
 132         }
 133         set_uniform_int(sdr_ltmap, "texmap", 0);
 134         set_uniform_int(sdr_ltmap, "lightmap", 1);
 135
 136         if(!fb_srgb) {
 137                 sdr_post_gamma = create_program_load("sdr/post_gamma.v.glsl", "sdr/post_gamma.p.glsl");
 138         }
 139
 140         glUseProgram(0);
 141
 142         if(opt.vr || opt.fullscreen) {
 143                 app_grab_mouse(true);
 144         }
 145         return true;
 146 }
 147
 148 void app_cleanup()
 149 {
 150         app_grab_mouse(false);
 151         if(opt.vr) {
 152                 goatvr_shutdown();
 153         }
 154
 155         blobs->destroy();
 156         delete blobs->node;
 157         delete blobs;
 158
 159         texman.clear();
 160         sceneman.clear();
 161 }
 162
 163 static bool constrain_walk_mesh(const Vec3 &v, Vec3 *newv)
 164 {
 165         Mesh *wm = mscn->walk_mesh;
 166         if(!wm) {
 167                 *newv = v;
 168                 return true;
 169         }
 170
 171         Ray downray = Ray(v, Vec3(0, -1, 0));
 172         HitPoint hit;
 173         if(mscn->walk_mesh->intersect(downray, &hit)) {
 174                 *newv = hit.pos;
 175                 newv->y += user_eye_height;
 176                 return true;
 177         }
 178         return false;
 179 }
 180
 181 static void update(float dt)
 182 {
 183         texman.update();
 184         sceneman.update();
 185
 186         mscn->update(dt);
 187         if(show_blobs) {
 188                 blobs->update(dt);
 189         }
 190
 191         float speed = walk_speed * dt;
 192         Vec3 dir;
 193
 194         // joystick
 195         float jdeadsq = joy_deadzone * joy_deadzone;
 196         float jmove_lensq = length_sq(joy_move);
 197         float jlook_lensq = length_sq(joy_look);
 198
 199         if(jmove_lensq > jdeadsq) {
 200                 float len = sqrt(jmove_lensq);
 201                 jmove_lensq -= jdeadsq;
 202
 203                 float mag = len * len;
 204                 dir.x += mag * joy_move.x / len * 2.0 * speed;
 205                 dir.z += mag * joy_move.y / len * 2.0 * speed;
 206         }
 207         if(jlook_lensq > jdeadsq) {
 208                 float len = sqrt(jlook_lensq);
 209                 jlook_lensq -= jdeadsq;
 210
 211                 float mag = len * len;
 212                 cam_theta += mag * joy_look.x / len * 200.0 * dt;
 213                 cam_phi += mag * joy_look.y / len * 100.0 * dt;
 214                 if(cam_phi < -90.0f) cam_phi = -90.0f;
 215                 if(cam_phi > 90.0f) cam_phi = 90.0f;
 216         }
 217
 218         // keyboard move
 219         if(keystate[(int)'w']) {
 220                 dir.z -= speed;
 221         }
 222         if(keystate[(int)'s']) {
 223                 dir.z += speed;
 224         }
 225         if(keystate[(int)'d']) {
 226                 dir.x += speed;
 227         }
 228         if(keystate[(int)'a']) {
 229                 dir.x -= speed;
 230         }
 231         if(keystate[(int)'q'] || gpad_bnstate[GPAD_UP]) {
 232                 cam_pos.y += speed;
 233         }
 234         if(keystate[(int)'z'] || gpad_bnstate[GPAD_DOWN]) {
 235                 cam_pos.y -= speed;
 236         }
 237
 238         float theta = M_PI * cam_theta / 180.0f;
 239         Vec3 newpos;
 240         newpos.x = cam_pos.x + cos(theta) * dir.x - sin(theta) * dir.z;
 241         newpos.y = cam_pos.y;
 242         newpos.z = cam_pos.z + sin(theta) * dir.x + cos(theta) * dir.z;
 243
 244         if(noclip) {
 245                 cam_pos = newpos;
 246         } else {
 247                 if(!constrain_walk_mesh(newpos, &cam_pos)) {
 248                         float dtheta = M_PI / 32.0;
 249                         float theta = dtheta;
 250                         Vec2 dir2d = newpos.xz() - cam_pos.xz();
 251
 252                         for(int i=0; i<16; i++) {
 253                                 Vec2 dvec = rotate(dir2d, theta);
 254                                 Vec3 pos = cam_pos + Vec3(dvec.x, 0, dvec.y);
 255                                 if(constrain_walk_mesh(pos, &cam_pos)) {
 256                                         break;
 257                                 }
 258                                 dvec = rotate(dir2d, -theta);
 259                                 pos = cam_pos + Vec3(dvec.x, 0, dvec.y);
 260                                 if(constrain_walk_mesh(pos, &cam_pos)) {
 261                                         break;
 262                                 }
 263                                 theta += dtheta;
 264                         }
 265                 }
 266                 floor_y = cam_pos.y - user_eye_height;
 267         }
 268
 269         // calculate mouselook view matrix
 270         mouse_view_matrix = Mat4::identity;
 271         mouse_view_matrix.pre_translate(0, 0, -cam_dist);
 272         if(!have_headtracking) {
 273                 mouse_view_matrix.pre_rotate_x(deg_to_rad(cam_phi));
 274         }
 275         mouse_view_matrix.pre_rotate_y(deg_to_rad(cam_theta));
 276         mouse_view_matrix.pre_translate(-cam_pos.x, -cam_pos.y, -cam_pos.z);
 277 }
 278
 279 static void set_light(int idx, const Vec3 &pos, const Vec3 &color)
 280 {
 281         unsigned int lt = GL_LIGHT0 + idx;
 282         float posv[] = { pos.x, pos.y, pos.z, 1 };
 283         float colv[] = { color.x, color.y, color.z, 1 };
 284
 285         glEnable(lt);
 286         glLightfv(lt, GL_POSITION, posv);
 287         glLightfv(lt, GL_DIFFUSE, colv);
 288         glLightfv(lt, GL_SPECULAR, colv);
 289 }
 290
 291 void app_display()
 292 {
 293         float dt = (float)(time_msec - prev_msec) / 1000.0f;
 294         prev_msec = time_msec;
 295
 296         update(dt);
 297
 298         if(opt.vr) {
 299                 // VR mode
 300                 goatvr_draw_start();
 301                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 302
 303                 for(int i=0; i<2; i++) {
 304                         // for each eye
 305                         goatvr_draw_eye(i);
 306
 307                         proj_matrix = goatvr_projection_matrix(i, NEAR_CLIP, FAR_CLIP);
 308                         glMatrixMode(GL_PROJECTION);
 309                         glLoadMatrixf(proj_matrix[0]);
 310
 311                         view_matrix = mouse_view_matrix * Mat4(goatvr_view_matrix(i));
 312                         glMatrixMode(GL_MODELVIEW);
 313                         glLoadMatrixf(view_matrix[0]);
 314
 315                         draw_scene();
 316                 }
 317                 goatvr_draw_done();
 318
 319                 if(should_swap) {
 320                         app_swap_buffers();
 321                 }
 322
 323         } else {
 324                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 325
 326                 proj_matrix.perspective(deg_to_rad(50.0), win_aspect, NEAR_CLIP, FAR_CLIP);
 327                 glMatrixMode(GL_PROJECTION);
 328                 glLoadMatrixf(proj_matrix[0]);
 329
 330                 view_matrix = mouse_view_matrix;
 331                 glMatrixMode(GL_MODELVIEW);
 332                 glLoadMatrixf(view_matrix[0]);
 333
 334                 draw_scene();
 335
 336                 if(!fb_srgb && sdr_post_gamma) {
 337                         slow_post(sdr_post_gamma);
 338                         glUseProgram(0);
 339                 }
 340                 app_swap_buffers();
 341         }
 342         assert(glGetError() == GL_NO_ERROR);
 343
 344         calc_framerate();
 345 }
 346
 347
 348 static void draw_scene()
 349 {
 350         static const Vec3 lpos[] = { Vec3(-50, 75, 100), Vec3(100, 0, 30), Vec3(-10, -10, 60) };
 351         set_light(0, lpos[0], Vec3(1.0, 0.8, 0.7) * 0.8);
 352         set_light(1, lpos[1], Vec3(0.6, 0.7, 1.0) * 0.6);
 353         set_light(2, lpos[2], Vec3(0.8, 1.0, 0.8) * 0.3);
 354
 355         mscn->draw();
 356         if(show_blobs) {
 357                 blobs->draw();
 358         }
 359
 360         if(show_walk_mesh && mscn->walk_mesh) {
 361                 glPushAttrib(GL_ENABLE_BIT);
 362                 glEnable(GL_BLEND);
 363                 glBlendFunc(GL_ONE, GL_ONE);
 364                 glDisable(GL_LIGHTING);
 365                 glEnable(GL_POLYGON_OFFSET_FILL);
 366
 367                 glUseProgram(0);
 368
 369                 glPolygonOffset(-1, 1);
 370                 glDepthMask(0);
 371
 372                 glColor3f(0.3, 0.08, 0.01);
 373                 mscn->walk_mesh->draw();
 374
 375                 glDepthMask(1);
 376
 377                 glPopAttrib();
 378         }
 379
 380         print_text(Vec2(9 * win_width / 10, 20), Vec3(1, 1, 0), "fps: %.1f", framerate);
 381         draw_ui();
 382 }
 383
 384
 385 void app_reshape(int x, int y)
 386 {
 387         glViewport(0, 0, x, y);
 388         goatvr_set_fb_size(x, y, 1.0f);
 389 }
 390
 391 void app_keyboard(int key, bool pressed)
 392 {
 393         unsigned int mod = app_get_modifiers();
 394
 395         if(pressed) {
 396                 switch(key) {
 397                 case 27:
 398                         app_quit();
 399                         break;
 400
 401                 case '\n':
 402                 case '\r':
 403                         if(mod & MOD_ALT) {
 404                                 app_toggle_fullscreen();
 405                         }
 406                         break;
 407
 408                 case '`':
 409                         app_toggle_grab_mouse();
 410                         show_message("mouse %s", app_is_mouse_grabbed() ? "grabbed" : "released");
 411                         break;
 412
 413                 case 'w':
 414                         if(mod & MOD_CTRL) {
 415                                 show_walk_mesh = !show_walk_mesh;
 416                                 show_message("walk mesh: %s", show_walk_mesh ? "on" : "off");
 417                         }
 418                         break;
 419
 420                 case 'c':
 421                         if(mod & MOD_CTRL) {
 422                                 noclip = !noclip;
 423                                 show_message(noclip ? "no clip" : "clip");
 424                         }
 425                         break;
 426
 427                 case 'f':
 428                         toggle_flight();
 429                         break;
 430
 431                 case 'p':
 432                         if(mod & MOD_CTRL) {
 433                                 fb_srgb = !fb_srgb;
 434                                 show_message("gamma correction for non-sRGB framebuffers: %s\n", fb_srgb ? "off" : "on");
 435                         }
 436                         break;
 437
 438                 case '=':
 439                         walk_speed *= 1.25;
 440                         show_message("walk speed: %g", walk_speed);
 441                         break;
 442
 443                 case '-':
 444                         walk_speed *= 0.75;
 445                         show_message("walk speed: %g", walk_speed);
 446                         break;
 447
 448                 case ']':
 449                         mouse_speed *= 1.2;
 450                         show_message("mouse speed: %g", mouse_speed);
 451                         break;
 452
 453                 case '[':
 454                         mouse_speed *= 0.8;
 455                         show_message("mouse speed: %g", mouse_speed);
 456                         break;
 457
 458                 case 'b':
 459                         show_blobs = !show_blobs;
 460                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 461                         break;
 462                 }
 463         }
 464
 465         if(key < 256 && !(mod & (MOD_CTRL | MOD_ALT))) {
 466                 keystate[key] = pressed;
 467         }
 468 }
 469
 470 void app_mouse_button(int bn, bool pressed, int x, int y)
 471 {
 472         prev_mx = x;
 473         prev_my = y;
 474         bnstate[bn] = pressed;
 475 }
 476
 477 static inline void mouse_look(float dx, float dy)
 478 {
 479         float scrsz = (float)win_height;
 480         cam_theta += dx * 512.0 / scrsz;
 481         cam_phi += dy * 512.0 / scrsz;
 482
 483         if(cam_phi < -90) cam_phi = -90;
 484         if(cam_phi > 90) cam_phi = 90;
 485 }
 486
 487 static void mouse_zoom(float dx, float dy)
 488 {
 489         cam_dist += dy * 0.1;
 490         if(cam_dist < 0.0) cam_dist = 0.0;
 491 }
 492
 493 void app_mouse_motion(int x, int y)
 494 {
 495         int dx = x - prev_mx;
 496         int dy = y - prev_my;
 497         prev_mx = x;
 498         prev_my = y;
 499
 500         if(!dx && !dy) return;
 501
 502         if(bnstate[0]) {
 503                 mouse_look(dx, dy);
 504         }
 505         if(bnstate[2]) {
 506                 mouse_zoom(dx, dy);
 507         }
 508 }
 509
 510 void app_mouse_delta(int dx, int dy)
 511 {
 512         if(bnstate[2]) {
 513                 mouse_zoom(dx * mouse_speed, dy * mouse_speed);
 514         } else {
 515                 mouse_look(dx * mouse_speed, dy * mouse_speed);
 516         }
 517 }
 518
 519 void app_gamepad_axis(int axis, float val)
 520 {
 521         switch(axis) {
 522         case 0:
 523                 joy_move.x = val;
 524                 break;
 525         case 1:
 526                 joy_move.y = val;
 527                 break;
 528
 529         case 2:
 530                 joy_look.x = val;
 531                 break;
 532         case 3:
 533                 joy_look.y = val;
 534                 break;
 535         }
 536 }
 537
 538 void app_gamepad_button(int bn, bool pressed)
 539 {
 540         gpad_bnstate[bn] = pressed;
 541
 542         if(pressed) {
 543                 switch(bn) {
 544                 case GPAD_LSTICK:
 545                         toggle_flight();
 546                         break;
 547
 548                 case GPAD_X:
 549                         show_blobs = !show_blobs;
 550                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 551                         break;
 552
 553                 default:
 554                         break;
 555                 }
 556         }
 557 }
 558
 559 static void toggle_flight()
 560 {
 561         static float prev_walk_speed = -1.0;
 562         if(prev_walk_speed < 0.0) {
 563                 noclip = true;
 564                 prev_walk_speed = walk_speed;
 565                 walk_speed = 1000.0;
 566                 show_message("fly mode\n");
 567         } else {
 568                 noclip = false;
 569                 walk_speed = prev_walk_speed;
 570                 prev_walk_speed = -1.0;
 571                 show_message("walk mode\n");
 572         }
 573 }
 574
 575 static void calc_framerate()
 576 {
 577         static int nframes;
 578         static long prev_upd;
 579
 580         long elapsed = time_msec - prev_upd;
 581         if(elapsed >= 1000) {
 582                 framerate = (float)nframes / (float)(elapsed * 0.001);
 583                 nframes = 1;
 584                 prev_upd = time_msec;
 585         } else {
 586                 ++nframes;
 587         }
 588 }