git.mutantstargoat.com Git - ld37_one_room/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       0.5
  19 #define FAR_CLIP        1000.0
  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_shadow, sdr_shadow_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 = 1.65;
  41
  42 static float walk_speed = 3.0f;
  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
  81                 goatvr_startvr();
  82                 should_swap = goatvr_should_swap() != 0;
  83                 user_eye_height = goatvr_get_eye_height();
  84                 have_headtracking = goatvr_have_headtracking();
  85
  86                 goatvr_recenter();
  87         }
  88
  89         int srgb_capable;
  90         glGetIntegerv(GL_FRAMEBUFFER_SRGB_CAPABLE_EXT, &srgb_capable);
  91         printf("Framebuffer %s sRGB-capable\n", srgb_capable ? "is" : "is not");
  92         fb_srgb = srgb_capable != 0;
  93         glEnable(GL_FRAMEBUFFER_SRGB);
  94
  95         glEnable(GL_MULTISAMPLE);
  96         glEnable(GL_DEPTH_TEST);
  97         glEnable(GL_CULL_FACE);
  98         glEnable(GL_LIGHTING);
  99         glEnable(GL_NORMALIZE);
 100
 101         Mesh::use_custom_sdr_attr = false;
 102
 103         float ambient[] = {0.0, 0.0, 0.0, 0.0};
 104         glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);
 105
 106         glClearColor(0.1, 0.1, 0.1, 1.0);
 107
 108         mscn = new MetaScene;
 109         if(!mscn->load(opt.scenefile ? opt.scenefile : "data/room.scene")) {
 110                 return false;
 111         }
 112
 113         cam_pos = mscn->start_pos;
 114         debug_log("start_pos: [%g %g %g]\n", cam_pos.x, cam_pos.y, cam_pos.z);
 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(0, 1, 0));
 123         blobs->node->set_scaling(Vec3(0.1, 0.1, 0.1));
 124         blobs->node->update(0);
 125
 126         if(!(sdr_shadow_notex = create_program_load("sdr/shadow.v.glsl", "sdr/shadow-notex.p.glsl"))) {
 127                 return false;
 128         }
 129         set_uniform_int(sdr_shadow_notex, "shadowmap", 1);
 130         set_uniform_int(sdr_shadow_notex, "envmap", 2);
 131
 132         if(!fb_srgb) {
 133                 sdr_post_gamma = create_program_load("sdr/post_gamma.v.glsl", "sdr/post_gamma.p.glsl");
 134         }
 135
 136         glUseProgram(0);
 137
 138         if(opt.vr || opt.fullscreen) {
 139                 app_grab_mouse(true);
 140         }
 141         return true;
 142 }
 143
 144 void app_cleanup()
 145 {
 146         app_grab_mouse(false);
 147         if(opt.vr) {
 148                 goatvr_shutdown();
 149         }
 150
 151         blobs->destroy();
 152         delete blobs->node;
 153         delete blobs;
 154
 155         texman.clear();
 156         sceneman.clear();
 157 }
 158
 159 static bool constrain_walk_mesh(const Vec3 &v, Vec3 *newv)
 160 {
 161         Mesh *wm = mscn->walk_mesh;
 162         if(!wm) {
 163                 *newv = v;
 164                 return true;
 165         }
 166
 167         Ray downray = Ray(v, Vec3(0, -1, 0));
 168         HitPoint hit;
 169         if(mscn->walk_mesh->intersect(downray, &hit)) {
 170                 *newv = hit.pos;
 171                 newv->y += user_eye_height;
 172                 return true;
 173         }
 174         return false;
 175 }
 176
 177 static void update(float dt)
 178 {
 179         texman.update();
 180         sceneman.update();
 181
 182         mscn->update(dt);
 183         if(show_blobs) {
 184                 blobs->update(dt);
 185         }
 186
 187         float speed = walk_speed * dt;
 188         Vec3 dir;
 189
 190         // joystick
 191         float jdeadsq = joy_deadzone * joy_deadzone;
 192         float jmove_lensq = length_sq(joy_move);
 193         float jlook_lensq = length_sq(joy_look);
 194
 195         if(jmove_lensq > jdeadsq) {
 196                 float len = sqrt(jmove_lensq);
 197                 jmove_lensq -= jdeadsq;
 198
 199                 float mag = len * len;
 200                 dir.x += mag * joy_move.x / len * 2.0 * speed;
 201                 dir.z += mag * joy_move.y / len * 2.0 * speed;
 202         }
 203         if(jlook_lensq > jdeadsq) {
 204                 float len = sqrt(jlook_lensq);
 205                 jlook_lensq -= jdeadsq;
 206
 207                 float mag = len * len;
 208                 cam_theta += mag * joy_look.x / len * 200.0 * dt;
 209                 cam_phi += mag * joy_look.y / len * 100.0 * dt;
 210                 if(cam_phi < -90.0f) cam_phi = -90.0f;
 211                 if(cam_phi > 90.0f) cam_phi = 90.0f;
 212         }
 213
 214         // keyboard move
 215         if(keystate[(int)'w']) {
 216                 dir.z -= speed;
 217         }
 218         if(keystate[(int)'s']) {
 219                 dir.z += speed;
 220         }
 221         if(keystate[(int)'d']) {
 222                 dir.x += speed;
 223         }
 224         if(keystate[(int)'a']) {
 225                 dir.x -= speed;
 226         }
 227         if(keystate[(int)'q'] || gpad_bnstate[GPAD_UP]) {
 228                 cam_pos.y += speed;
 229         }
 230         if(keystate[(int)'z'] || gpad_bnstate[GPAD_DOWN]) {
 231                 cam_pos.y -= speed;
 232         }
 233
 234         float theta = M_PI * cam_theta / 180.0f;
 235         Vec3 newpos;
 236         newpos.x = cam_pos.x + cos(theta) * dir.x - sin(theta) * dir.z;
 237         newpos.y = cam_pos.y;
 238         newpos.z = cam_pos.z + sin(theta) * dir.x + cos(theta) * dir.z;
 239
 240         if(noclip) {
 241                 cam_pos = newpos;
 242         } else {
 243                 if(!constrain_walk_mesh(newpos, &cam_pos)) {
 244                         float dtheta = M_PI / 32.0;
 245                         float theta = dtheta;
 246                         Vec2 dir2d = newpos.xz() - cam_pos.xz();
 247
 248                         for(int i=0; i<16; i++) {
 249                                 Vec2 dvec = rotate(dir2d, theta);
 250                                 Vec3 pos = cam_pos + Vec3(dvec.x, 0, dvec.y);
 251                                 if(constrain_walk_mesh(pos, &cam_pos)) {
 252                                         break;
 253                                 }
 254                                 dvec = rotate(dir2d, -theta);
 255                                 pos = cam_pos + Vec3(dvec.x, 0, dvec.y);
 256                                 if(constrain_walk_mesh(pos, &cam_pos)) {
 257                                         break;
 258                                 }
 259                                 theta += dtheta;
 260                         }
 261                 }
 262                 floor_y = cam_pos.y - user_eye_height;
 263         }
 264
 265         // calculate mouselook view matrix
 266         mouse_view_matrix = Mat4::identity;
 267         mouse_view_matrix.pre_translate(0, 0, -cam_dist);
 268         if(!have_headtracking) {
 269                 mouse_view_matrix.pre_rotate_x(deg_to_rad(cam_phi));
 270         }
 271         mouse_view_matrix.pre_rotate_y(deg_to_rad(cam_theta));
 272         mouse_view_matrix.pre_translate(-cam_pos.x, -cam_pos.y, -cam_pos.z);
 273 }
 274
 275 static void set_light(int idx, const Vec3 &pos, const Vec3 &color)
 276 {
 277         unsigned int lt = GL_LIGHT0 + idx;
 278         float posv[] = { pos.x, pos.y, pos.z, 1 };
 279         float colv[] = { color.x, color.y, color.z, 1 };
 280
 281         glEnable(lt);
 282         glLightfv(lt, GL_POSITION, posv);
 283         glLightfv(lt, GL_DIFFUSE, colv);
 284         glLightfv(lt, GL_SPECULAR, colv);
 285 }
 286
 287 void app_display()
 288 {
 289         float dt = (float)(time_msec - prev_msec) / 1000.0f;
 290         prev_msec = time_msec;
 291
 292         update(dt);
 293
 294         if(opt.vr) {
 295                 // VR mode
 296                 goatvr_draw_start();
 297                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 298
 299                 for(int i=0; i<2; i++) {
 300                         // for each eye
 301                         goatvr_draw_eye(i);
 302
 303                         proj_matrix = goatvr_projection_matrix(i, NEAR_CLIP, FAR_CLIP);
 304                         glMatrixMode(GL_PROJECTION);
 305                         glLoadMatrixf(proj_matrix[0]);
 306
 307                         view_matrix = mouse_view_matrix * Mat4(goatvr_view_matrix(i));
 308                         glMatrixMode(GL_MODELVIEW);
 309                         glLoadMatrixf(view_matrix[0]);
 310
 311                         draw_scene();
 312                 }
 313                 goatvr_draw_done();
 314
 315                 if(should_swap) {
 316                         app_swap_buffers();
 317                 }
 318
 319         } else {
 320                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 321
 322                 proj_matrix.perspective(deg_to_rad(60.0), win_aspect, NEAR_CLIP, FAR_CLIP);
 323                 glMatrixMode(GL_PROJECTION);
 324                 glLoadMatrixf(proj_matrix[0]);
 325
 326                 view_matrix = mouse_view_matrix;
 327                 glMatrixMode(GL_MODELVIEW);
 328                 glLoadMatrixf(view_matrix[0]);
 329
 330                 draw_scene();
 331
 332                 if(!fb_srgb && sdr_post_gamma) {
 333                         slow_post(sdr_post_gamma);
 334                         glUseProgram(0);
 335                 }
 336                 app_swap_buffers();
 337         }
 338         assert(glGetError() == GL_NO_ERROR);
 339
 340         calc_framerate();
 341 }
 342
 343
 344 static void draw_scene()
 345 {
 346         static const Vec3 lpos[] = { Vec3(-50, 75, 100), Vec3(100, 0, 30), Vec3(-10, -10, 60) };
 347         set_light(0, lpos[0], Vec3(1.0, 0.8, 0.7) * 0.8);
 348         set_light(1, lpos[1], Vec3(0.6, 0.7, 1.0) * 0.6);
 349         set_light(2, lpos[2], Vec3(0.8, 1.0, 0.8) * 0.3);
 350
 351         mscn->draw();
 352         if(show_blobs) {
 353                 blobs->draw();
 354         }
 355
 356         if(show_walk_mesh && mscn->walk_mesh) {
 357                 glPushAttrib(GL_ENABLE_BIT);
 358                 glEnable(GL_BLEND);
 359                 glBlendFunc(GL_ONE, GL_ONE);
 360                 glDisable(GL_LIGHTING);
 361                 glEnable(GL_POLYGON_OFFSET_FILL);
 362
 363                 glUseProgram(0);
 364
 365                 glPolygonOffset(-1, 1);
 366                 glDepthMask(0);
 367
 368                 glColor3f(0.3, 0.08, 0.01);
 369                 mscn->walk_mesh->draw();
 370
 371                 glDepthMask(1);
 372
 373                 glPopAttrib();
 374         }
 375
 376         print_text(Vec2(9 * win_width / 10, 20), Vec3(1, 1, 0), "fps: %.1f", framerate);
 377         draw_ui();
 378 }
 379
 380
 381 void app_reshape(int x, int y)
 382 {
 383         glViewport(0, 0, x, y);
 384         goatvr_set_fb_size(x, y, 1.0f);
 385 }
 386
 387 void app_keyboard(int key, bool pressed)
 388 {
 389         unsigned int mod = app_get_modifiers();
 390
 391         if(pressed) {
 392                 switch(key) {
 393                 case 27:
 394                         app_quit();
 395                         break;
 396
 397                 case '\n':
 398                 case '\r':
 399                         if(mod & MOD_ALT) {
 400                                 app_toggle_fullscreen();
 401                         }
 402                         break;
 403
 404                 case '`':
 405                         app_toggle_grab_mouse();
 406                         show_message("mouse %s", app_is_mouse_grabbed() ? "grabbed" : "released");
 407                         break;
 408
 409                 case 'w':
 410                         if(mod & MOD_CTRL) {
 411                                 show_walk_mesh = !show_walk_mesh;
 412                                 show_message("walk mesh: %s", show_walk_mesh ? "on" : "off");
 413                         }
 414                         break;
 415
 416                 case 'c':
 417                         if(mod & MOD_CTRL) {
 418                                 noclip = !noclip;
 419                                 show_message(noclip ? "no clip" : "clip");
 420                         }
 421                         break;
 422
 423                 case 'f':
 424                         toggle_flight();
 425                         break;
 426
 427                 case 'p':
 428                         if(mod & MOD_CTRL) {
 429                                 fb_srgb = !fb_srgb;
 430                                 show_message("gamma correction for non-sRGB framebuffers: %s\n", fb_srgb ? "off" : "on");
 431                         }
 432                         break;
 433
 434                 case '=':
 435                         walk_speed *= 1.25;
 436                         show_message("walk speed: %g", walk_speed);
 437                         break;
 438
 439                 case '-':
 440                         walk_speed *= 0.75;
 441                         show_message("walk speed: %g", walk_speed);
 442                         break;
 443
 444                 case ']':
 445                         mouse_speed *= 1.2;
 446                         show_message("mouse speed: %g", mouse_speed);
 447                         break;
 448
 449                 case '[':
 450                         mouse_speed *= 0.8;
 451                         show_message("mouse speed: %g", mouse_speed);
 452                         break;
 453
 454                 case 'b':
 455                         show_blobs = !show_blobs;
 456                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 457                         break;
 458                 }
 459         }
 460
 461         if(key < 256 && !(mod & (MOD_CTRL | MOD_ALT))) {
 462                 keystate[key] = pressed;
 463         }
 464 }
 465
 466 void app_mouse_button(int bn, bool pressed, int x, int y)
 467 {
 468         prev_mx = x;
 469         prev_my = y;
 470         bnstate[bn] = pressed;
 471 }
 472
 473 static inline void mouse_look(float dx, float dy)
 474 {
 475         float scrsz = (float)win_height;
 476         cam_theta += dx * 512.0 / scrsz;
 477         cam_phi += dy * 512.0 / scrsz;
 478
 479         if(cam_phi < -90) cam_phi = -90;
 480         if(cam_phi > 90) cam_phi = 90;
 481 }
 482
 483 static void mouse_zoom(float dx, float dy)
 484 {
 485         cam_dist += dy * 0.1;
 486         if(cam_dist < 0.0) cam_dist = 0.0;
 487 }
 488
 489 void app_mouse_motion(int x, int y)
 490 {
 491         int dx = x - prev_mx;
 492         int dy = y - prev_my;
 493         prev_mx = x;
 494         prev_my = y;
 495
 496         if(!dx && !dy) return;
 497
 498         if(bnstate[0]) {
 499                 mouse_look(dx, dy);
 500         }
 501         if(bnstate[2]) {
 502                 mouse_zoom(dx, dy);
 503         }
 504 }
 505
 506 void app_mouse_delta(int dx, int dy)
 507 {
 508         if(bnstate[2]) {
 509                 mouse_zoom(dx * mouse_speed, dy * mouse_speed);
 510         } else {
 511                 mouse_look(dx * mouse_speed, dy * mouse_speed);
 512         }
 513 }
 514
 515 void app_gamepad_axis(int axis, float val)
 516 {
 517         switch(axis) {
 518         case 0:
 519                 joy_move.x = val;
 520                 break;
 521         case 1:
 522                 joy_move.y = val;
 523                 break;
 524
 525         case 2:
 526                 joy_look.x = val;
 527                 break;
 528         case 3:
 529                 joy_look.y = val;
 530                 break;
 531         }
 532 }
 533
 534 void app_gamepad_button(int bn, bool pressed)
 535 {
 536         gpad_bnstate[bn] = pressed;
 537
 538         if(pressed) {
 539                 switch(bn) {
 540                 case GPAD_LSTICK:
 541                         toggle_flight();
 542                         break;
 543
 544                 case GPAD_X:
 545                         show_blobs = !show_blobs;
 546                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 547                         break;
 548
 549                 default:
 550                         break;
 551                 }
 552         }
 553 }
 554
 555 static void toggle_flight()
 556 {
 557         static float prev_walk_speed = -1.0;
 558         if(prev_walk_speed < 0.0) {
 559                 noclip = true;
 560                 prev_walk_speed = walk_speed;
 561                 walk_speed = 10.0;
 562                 show_message("fly mode\n");
 563         } else {
 564                 noclip = false;
 565                 walk_speed = prev_walk_speed;
 566                 prev_walk_speed = -1.0;
 567                 show_message("walk mode\n");
 568         }
 569 }
 570
 571 static void calc_framerate()
 572 {
 573         //static int ncalc;
 574         static int nframes;
 575         static long prev_upd;
 576
 577         long elapsed = time_msec - prev_upd;
 578         if(elapsed >= 1000) {
 579                 framerate = (float)nframes / (float)(elapsed * 0.001);
 580                 nframes = 1;
 581                 prev_upd = time_msec;
 582
 583                 /*if(++ncalc >= 5) {
 584                         printf("fps: %f\n", framerate);
 585                         ncalc = 0;
 586                 }*/
 587         } else {
 588                 ++nframes;
 589         }
 590 }