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 = 1;
  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->update(0);
 124
 125         if(!(sdr_shadow_notex = create_program_load("sdr/shadow.v.glsl", "sdr/shadow-notex.p.glsl"))) {
 126                 return false;
 127         }
 128         set_uniform_int(sdr_shadow_notex, "shadowmap", 1);
 129         set_uniform_int(sdr_shadow_notex, "envmap", 2);
 130
 131         if(!fb_srgb) {
 132                 sdr_post_gamma = create_program_load("sdr/post_gamma.v.glsl", "sdr/post_gamma.p.glsl");
 133         }
 134
 135         glUseProgram(0);
 136
 137         if(opt.vr || opt.fullscreen) {
 138                 app_grab_mouse(true);
 139         }
 140         return true;
 141 }
 142
 143 void app_cleanup()
 144 {
 145         app_grab_mouse(false);
 146         if(opt.vr) {
 147                 goatvr_shutdown();
 148         }
 149
 150         blobs->destroy();
 151         delete blobs->node;
 152         delete blobs;
 153
 154         texman.clear();
 155         sceneman.clear();
 156 }
 157
 158 static bool constrain_walk_mesh(const Vec3 &v, Vec3 *newv)
 159 {
 160         Mesh *wm = mscn->walk_mesh;
 161         if(!wm) {
 162                 *newv = v;
 163                 return true;
 164         }
 165
 166         Ray downray = Ray(v, Vec3(0, -1, 0));
 167         HitPoint hit;
 168         if(mscn->walk_mesh->intersect(downray, &hit)) {
 169                 *newv = hit.pos;
 170                 newv->y += user_eye_height;
 171                 return true;
 172         }
 173         return false;
 174 }
 175
 176 static void update(float dt)
 177 {
 178         texman.update();
 179         sceneman.update();
 180
 181         mscn->update(dt);
 182         if(show_blobs) {
 183                 blobs->update(dt);
 184         }
 185
 186         float speed = walk_speed * dt;
 187         Vec3 dir;
 188
 189         // joystick
 190         float jdeadsq = joy_deadzone * joy_deadzone;
 191         float jmove_lensq = length_sq(joy_move);
 192         float jlook_lensq = length_sq(joy_look);
 193
 194         if(jmove_lensq > jdeadsq) {
 195                 float len = sqrt(jmove_lensq);
 196                 jmove_lensq -= jdeadsq;
 197
 198                 float mag = len * len;
 199                 dir.x += mag * joy_move.x / len * 2.0 * speed;
 200                 dir.z += mag * joy_move.y / len * 2.0 * speed;
 201         }
 202         if(jlook_lensq > jdeadsq) {
 203                 float len = sqrt(jlook_lensq);
 204                 jlook_lensq -= jdeadsq;
 205
 206                 float mag = len * len;
 207                 cam_theta += mag * joy_look.x / len * 200.0 * dt;
 208                 cam_phi += mag * joy_look.y / len * 100.0 * dt;
 209                 if(cam_phi < -90.0f) cam_phi = -90.0f;
 210                 if(cam_phi > 90.0f) cam_phi = 90.0f;
 211         }
 212
 213         // keyboard move
 214         if(keystate[(int)'w']) {
 215                 dir.z -= speed;
 216         }
 217         if(keystate[(int)'s']) {
 218                 dir.z += speed;
 219         }
 220         if(keystate[(int)'d']) {
 221                 dir.x += speed;
 222         }
 223         if(keystate[(int)'a']) {
 224                 dir.x -= speed;
 225         }
 226         if(keystate[(int)'q'] || gpad_bnstate[GPAD_UP]) {
 227                 cam_pos.y += speed;
 228         }
 229         if(keystate[(int)'z'] || gpad_bnstate[GPAD_DOWN]) {
 230                 cam_pos.y -= speed;
 231         }
 232
 233         float theta = M_PI * cam_theta / 180.0f;
 234         Vec3 newpos;
 235         newpos.x = cam_pos.x + cos(theta) * dir.x - sin(theta) * dir.z;
 236         newpos.y = cam_pos.y;
 237         newpos.z = cam_pos.z + sin(theta) * dir.x + cos(theta) * dir.z;
 238
 239         if(noclip) {
 240                 cam_pos = newpos;
 241         } else {
 242                 if(!constrain_walk_mesh(newpos, &cam_pos)) {
 243                         float dtheta = M_PI / 32.0;
 244                         float theta = dtheta;
 245                         Vec2 dir2d = newpos.xz() - cam_pos.xz();
 246
 247                         for(int i=0; i<16; i++) {
 248                                 Vec2 dvec = rotate(dir2d, theta);
 249                                 Vec3 pos = cam_pos + Vec3(dvec.x, 0, dvec.y);
 250                                 if(constrain_walk_mesh(pos, &cam_pos)) {
 251                                         break;
 252                                 }
 253                                 dvec = rotate(dir2d, -theta);
 254                                 pos = cam_pos + Vec3(dvec.x, 0, dvec.y);
 255                                 if(constrain_walk_mesh(pos, &cam_pos)) {
 256                                         break;
 257                                 }
 258                                 theta += dtheta;
 259                         }
 260                 }
 261                 floor_y = cam_pos.y - user_eye_height;
 262         }
 263
 264         // calculate mouselook view matrix
 265         mouse_view_matrix = Mat4::identity;
 266         mouse_view_matrix.pre_translate(0, 0, -cam_dist);
 267         if(!have_headtracking) {
 268                 mouse_view_matrix.pre_rotate_x(deg_to_rad(cam_phi));
 269         }
 270         mouse_view_matrix.pre_rotate_y(deg_to_rad(cam_theta));
 271         mouse_view_matrix.pre_translate(-cam_pos.x, -cam_pos.y, -cam_pos.z);
 272 }
 273
 274 static void set_light(int idx, const Vec3 &pos, const Vec3 &color)
 275 {
 276         unsigned int lt = GL_LIGHT0 + idx;
 277         float posv[] = { pos.x, pos.y, pos.z, 1 };
 278         float colv[] = { color.x, color.y, color.z, 1 };
 279
 280         glEnable(lt);
 281         glLightfv(lt, GL_POSITION, posv);
 282         glLightfv(lt, GL_DIFFUSE, colv);
 283         glLightfv(lt, GL_SPECULAR, colv);
 284 }
 285
 286 void app_display()
 287 {
 288         float dt = (float)(time_msec - prev_msec) / 1000.0f;
 289         prev_msec = time_msec;
 290
 291         update(dt);
 292
 293         if(opt.vr) {
 294                 // VR mode
 295                 goatvr_draw_start();
 296                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 297
 298                 for(int i=0; i<2; i++) {
 299                         // for each eye
 300                         goatvr_draw_eye(i);
 301
 302                         proj_matrix = goatvr_projection_matrix(i, NEAR_CLIP, FAR_CLIP);
 303                         glMatrixMode(GL_PROJECTION);
 304                         glLoadMatrixf(proj_matrix[0]);
 305
 306                         view_matrix = mouse_view_matrix * Mat4(goatvr_view_matrix(i));
 307                         glMatrixMode(GL_MODELVIEW);
 308                         glLoadMatrixf(view_matrix[0]);
 309
 310                         draw_scene();
 311                 }
 312                 goatvr_draw_done();
 313
 314                 if(should_swap) {
 315                         app_swap_buffers();
 316                 }
 317
 318         } else {
 319                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 320
 321                 proj_matrix.perspective(deg_to_rad(50.0), win_aspect, NEAR_CLIP, FAR_CLIP);
 322                 glMatrixMode(GL_PROJECTION);
 323                 glLoadMatrixf(proj_matrix[0]);
 324
 325                 view_matrix = mouse_view_matrix;
 326                 glMatrixMode(GL_MODELVIEW);
 327                 glLoadMatrixf(view_matrix[0]);
 328
 329                 draw_scene();
 330
 331                 if(!fb_srgb && sdr_post_gamma) {
 332                         slow_post(sdr_post_gamma);
 333                         glUseProgram(0);
 334                 }
 335                 app_swap_buffers();
 336         }
 337         assert(glGetError() == GL_NO_ERROR);
 338
 339         calc_framerate();
 340 }
 341
 342
 343 static void draw_scene()
 344 {
 345         static const Vec3 lpos[] = { Vec3(-50, 75, 100), Vec3(100, 0, 30), Vec3(-10, -10, 60) };
 346         set_light(0, lpos[0], Vec3(1.0, 0.8, 0.7) * 0.8);
 347         set_light(1, lpos[1], Vec3(0.6, 0.7, 1.0) * 0.6);
 348         set_light(2, lpos[2], Vec3(0.8, 1.0, 0.8) * 0.3);
 349
 350         mscn->draw();
 351         if(show_blobs) {
 352                 blobs->draw();
 353         }
 354
 355         if(show_walk_mesh && mscn->walk_mesh) {
 356                 glPushAttrib(GL_ENABLE_BIT);
 357                 glEnable(GL_BLEND);
 358                 glBlendFunc(GL_ONE, GL_ONE);
 359                 glDisable(GL_LIGHTING);
 360                 glEnable(GL_POLYGON_OFFSET_FILL);
 361
 362                 glUseProgram(0);
 363
 364                 glPolygonOffset(-1, 1);
 365                 glDepthMask(0);
 366
 367                 glColor3f(0.3, 0.08, 0.01);
 368                 mscn->walk_mesh->draw();
 369
 370                 glDepthMask(1);
 371
 372                 glPopAttrib();
 373         }
 374
 375         print_text(Vec2(9 * win_width / 10, 20), Vec3(1, 1, 0), "fps: %.1f", framerate);
 376         draw_ui();
 377 }
 378
 379
 380 void app_reshape(int x, int y)
 381 {
 382         glViewport(0, 0, x, y);
 383         goatvr_set_fb_size(x, y, 1.0f);
 384 }
 385
 386 void app_keyboard(int key, bool pressed)
 387 {
 388         unsigned int mod = app_get_modifiers();
 389
 390         if(pressed) {
 391                 switch(key) {
 392                 case 27:
 393                         app_quit();
 394                         break;
 395
 396                 case '\n':
 397                 case '\r':
 398                         if(mod & MOD_ALT) {
 399                                 app_toggle_fullscreen();
 400                         }
 401                         break;
 402
 403                 case '`':
 404                         app_toggle_grab_mouse();
 405                         show_message("mouse %s", app_is_mouse_grabbed() ? "grabbed" : "released");
 406                         break;
 407
 408                 case 'w':
 409                         if(mod & MOD_CTRL) {
 410                                 show_walk_mesh = !show_walk_mesh;
 411                                 show_message("walk mesh: %s", show_walk_mesh ? "on" : "off");
 412                         }
 413                         break;
 414
 415                 case 'c':
 416                         if(mod & MOD_CTRL) {
 417                                 noclip = !noclip;
 418                                 show_message(noclip ? "no clip" : "clip");
 419                         }
 420                         break;
 421
 422                 case 'f':
 423                         toggle_flight();
 424                         break;
 425
 426                 case 'p':
 427                         if(mod & MOD_CTRL) {
 428                                 fb_srgb = !fb_srgb;
 429                                 show_message("gamma correction for non-sRGB framebuffers: %s\n", fb_srgb ? "off" : "on");
 430                         }
 431                         break;
 432
 433                 case '=':
 434                         walk_speed *= 1.25;
 435                         show_message("walk speed: %g", walk_speed);
 436                         break;
 437
 438                 case '-':
 439                         walk_speed *= 0.75;
 440                         show_message("walk speed: %g", walk_speed);
 441                         break;
 442
 443                 case ']':
 444                         mouse_speed *= 1.2;
 445                         show_message("mouse speed: %g", mouse_speed);
 446                         break;
 447
 448                 case '[':
 449                         mouse_speed *= 0.8;
 450                         show_message("mouse speed: %g", mouse_speed);
 451                         break;
 452
 453                 case 'b':
 454                         show_blobs = !show_blobs;
 455                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 456                         break;
 457                 }
 458         }
 459
 460         if(key < 256 && !(mod & (MOD_CTRL | MOD_ALT))) {
 461                 keystate[key] = pressed;
 462         }
 463 }
 464
 465 void app_mouse_button(int bn, bool pressed, int x, int y)
 466 {
 467         prev_mx = x;
 468         prev_my = y;
 469         bnstate[bn] = pressed;
 470 }
 471
 472 static inline void mouse_look(float dx, float dy)
 473 {
 474         float scrsz = (float)win_height;
 475         cam_theta += dx * 512.0 / scrsz;
 476         cam_phi += dy * 512.0 / scrsz;
 477
 478         if(cam_phi < -90) cam_phi = -90;
 479         if(cam_phi > 90) cam_phi = 90;
 480 }
 481
 482 static void mouse_zoom(float dx, float dy)
 483 {
 484         cam_dist += dy * 0.1;
 485         if(cam_dist < 0.0) cam_dist = 0.0;
 486 }
 487
 488 void app_mouse_motion(int x, int y)
 489 {
 490         int dx = x - prev_mx;
 491         int dy = y - prev_my;
 492         prev_mx = x;
 493         prev_my = y;
 494
 495         if(!dx && !dy) return;
 496
 497         if(bnstate[0]) {
 498                 mouse_look(dx, dy);
 499         }
 500         if(bnstate[2]) {
 501                 mouse_zoom(dx, dy);
 502         }
 503 }
 504
 505 void app_mouse_delta(int dx, int dy)
 506 {
 507         if(bnstate[2]) {
 508                 mouse_zoom(dx * mouse_speed, dy * mouse_speed);
 509         } else {
 510                 mouse_look(dx * mouse_speed, dy * mouse_speed);
 511         }
 512 }
 513
 514 void app_gamepad_axis(int axis, float val)
 515 {
 516         switch(axis) {
 517         case 0:
 518                 joy_move.x = val;
 519                 break;
 520         case 1:
 521                 joy_move.y = val;
 522                 break;
 523
 524         case 2:
 525                 joy_look.x = val;
 526                 break;
 527         case 3:
 528                 joy_look.y = val;
 529                 break;
 530         }
 531 }
 532
 533 void app_gamepad_button(int bn, bool pressed)
 534 {
 535         gpad_bnstate[bn] = pressed;
 536
 537         if(pressed) {
 538                 switch(bn) {
 539                 case GPAD_LSTICK:
 540                         toggle_flight();
 541                         break;
 542
 543                 case GPAD_X:
 544                         show_blobs = !show_blobs;
 545                         show_message("blobs: %s\n", show_blobs ? "on" : "off");
 546                         break;
 547
 548                 default:
 549                         break;
 550                 }
 551         }
 552 }
 553
 554 static void toggle_flight()
 555 {
 556         static float prev_walk_speed = -1.0;
 557         if(prev_walk_speed < 0.0) {
 558                 noclip = true;
 559                 prev_walk_speed = walk_speed;
 560                 walk_speed = 10.0;
 561                 show_message("fly mode\n");
 562         } else {
 563                 noclip = false;
 564                 walk_speed = prev_walk_speed;
 565                 prev_walk_speed = -1.0;
 566                 show_message("walk mode\n");
 567         }
 568 }
 569
 570 static void calc_framerate()
 571 {
 572         //static int ncalc;
 573         static int nframes;
 574         static long prev_upd;
 575
 576         long elapsed = time_msec - prev_upd;
 577         if(elapsed >= 1000) {
 578                 framerate = (float)nframes / (float)(elapsed * 0.001);
 579                 nframes = 1;
 580                 prev_upd = time_msec;
 581
 582                 /*if(++ncalc >= 5) {
 583                         printf("fps: %f\n", framerate);
 584                         ncalc = 0;
 585                 }*/
 586         } else {
 587                 ++nframes;
 588         }
 589 }