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
  17 #define NEAR_CLIP       5.0
  18 #define FAR_CLIP        10000.0
  19
  20 static void draw_scene();
  21 static void toggle_flight();
  22
  23 long time_msec;
  24 int win_width, win_height;
  25 float win_aspect;
  26 bool fb_srgb;
  27 bool opt_gear_wireframe;
  28
  29 unsigned int sdr_ltmap, sdr_ltmap_notex;
  30
  31 static float cam_dist = 0.0;
  32 static float cam_theta, cam_phi = 20;
  33 static Vec3 cam_pos;
  34 static float floor_y;   // last floor height
  35 static float user_eye_height = 165;
  36
  37 static float walk_speed = 300.0f;
  38 static float mouse_speed = 0.5f;
  39 static bool show_walk_mesh, noclip = false;
  40
  41 static bool have_headtracking, should_swap;
  42
  43 static int prev_mx, prev_my;
  44 static bool bnstate[8];
  45 static bool keystate[256];
  46 static bool gpad_bnstate[64];
  47 static Vec2 joy_move, joy_look;
  48 static float joy_deadzone = 0.01;
  49
  50 static Mat4 view_matrix, mouse_view_matrix, proj_matrix;
  51 static TextureSet texman;
  52 static Scene *scn;
  53 static unsigned int sdr_post_gamma;
  54
  55 static long prev_msec;
  56
  57
  58 bool app_init(int argc, char **argv)
  59 {
  60         if(!init_options(argc, argv, "demo.conf")) {
  61                 return false;
  62         }
  63         app_resize(opt.width, opt.height);
  64         app_fullscreen(opt.fullscreen);
  65
  66         if(opt.vr) {
  67                 if(goatvr_init() == -1) {
  68                         return false;
  69                 }
  70                 goatvr_set_origin_mode(GOATVR_HEAD);
  71                 goatvr_set_units_scale(100.0f);
  72
  73                 goatvr_startvr();
  74                 should_swap = goatvr_should_swap() != 0;
  75                 user_eye_height = goatvr_get_eye_height();
  76                 have_headtracking = goatvr_have_headtracking();
  77
  78                 goatvr_recenter();
  79         }
  80
  81         int srgb_capable;
  82         glGetIntegerv(GL_FRAMEBUFFER_SRGB_CAPABLE_EXT, &srgb_capable);
  83         printf("Framebuffer %s sRGB-capable\n", srgb_capable ? "is" : "is not");
  84         fb_srgb = srgb_capable != 0;
  85         glEnable(GL_FRAMEBUFFER_SRGB);
  86
  87         glEnable(GL_MULTISAMPLE);
  88         glEnable(GL_DEPTH_TEST);
  89         glEnable(GL_CULL_FACE);
  90         glEnable(GL_LIGHTING);
  91         glEnable(GL_NORMALIZE);
  92
  93         Mesh::use_custom_sdr_attr = false;
  94
  95         float ambient[] = {0.0, 0.0, 0.0, 0.0};
  96         glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);
  97
  98         glClearColor(0.2, 0.2, 0.2, 1.0);
  99
 100         scn = new Scene(&texman);
 101         if(!load_scene(scn, opt.scenefile ? opt.scenefile : "data/museum.scene")) {
 102                 return false;
 103         }
 104
 105         // set initial cam_pos above the center of the walk mesh (if any)
 106         if(scn->walk_mesh) {
 107                 Vec3 bcent;
 108                 float brad;
 109                 scn->walk_mesh->get_bsphere(&bcent, &brad);
 110
 111                 floor_y = bcent.y;
 112                 cam_pos = bcent + Vec3(0, user_eye_height, 0);
 113         }
 114
 115         if(!(sdr_ltmap_notex = create_program_load("sdr/lightmap.v.glsl", "sdr/lightmap-notex.p.glsl"))) {
 116                 return false;
 117         }
 118
 119         if(!(sdr_ltmap = create_program_load("sdr/lightmap.v.glsl", "sdr/lightmap-tex.p.glsl"))) {
 120                 return false;
 121         }
 122         set_uniform_int(sdr_ltmap, "texmap", 0);
 123         set_uniform_int(sdr_ltmap, "lightmap", 1);
 124
 125         if(!fb_srgb) {
 126                 sdr_post_gamma = create_program_load("sdr/post_gamma.v.glsl", "sdr/post_gamma.p.glsl");
 127         }
 128
 129         glUseProgram(0);
 130
 131         if(opt.vr || opt.fullscreen) {
 132                 app_grab_mouse(true);
 133         }
 134         return true;
 135 }
 136
 137 void app_cleanup()
 138 {
 139         app_grab_mouse(false);
 140         if(opt.vr) {
 141                 goatvr_shutdown();
 142         }
 143         texman.clear();
 144 }
 145
 146 static bool constrain_walk_mesh(const Vec3 &v, Vec3 *newv)
 147 {
 148         Mesh *wm = scn->walk_mesh;
 149         if(!wm) {
 150                 *newv = v;
 151                 return true;
 152         }
 153
 154         Ray downray = Ray(v, Vec3(0, -1, 0));
 155         HitPoint hit;
 156         if(scn->walk_mesh->intersect(downray, &hit)) {
 157                 *newv = hit.pos;
 158                 newv->y += user_eye_height;
 159                 return true;
 160         }
 161         return false;
 162 }
 163
 164 static void update(float dt)
 165 {
 166         texman.update();
 167
 168         scn->update(dt);
 169
 170         float speed = walk_speed * dt;
 171         Vec3 dir;
 172
 173         // joystick
 174         float jdeadsq = joy_deadzone * joy_deadzone;
 175         float jmove_lensq = length_sq(joy_move);
 176         float jlook_lensq = length_sq(joy_look);
 177
 178         if(jmove_lensq > jdeadsq) {
 179                 float len = sqrt(jmove_lensq);
 180                 jmove_lensq -= jdeadsq;
 181
 182                 float mag = len * len;
 183                 dir.x += mag * joy_move.x / len * 2.0 * speed;
 184                 dir.z += mag * joy_move.y / len * 2.0 * speed;
 185         }
 186         if(jlook_lensq > jdeadsq) {
 187                 float len = sqrt(jlook_lensq);
 188                 jlook_lensq -= jdeadsq;
 189
 190                 float mag = len * len;
 191                 cam_theta += mag * joy_look.x / len * 200.0 * dt;
 192                 cam_phi += mag * joy_look.y / len * 100.0 * dt;
 193                 if(cam_phi < -90.0f) cam_phi = -90.0f;
 194                 if(cam_phi > 90.0f) cam_phi = 90.0f;
 195         }
 196
 197         // keyboard move
 198         if(keystate[(int)'w']) {
 199                 dir.z -= speed;
 200         }
 201         if(keystate[(int)'s']) {
 202                 dir.z += speed;
 203         }
 204         if(keystate[(int)'d']) {
 205                 dir.x += speed;
 206         }
 207         if(keystate[(int)'a']) {
 208                 dir.x -= speed;
 209         }
 210         if(keystate[(int)'q'] || gpad_bnstate[GPAD_UP]) {
 211                 cam_pos.y += speed;
 212         }
 213         if(keystate[(int)'z'] || gpad_bnstate[GPAD_DOWN]) {
 214                 cam_pos.y -= speed;
 215         }
 216
 217         float theta = M_PI * cam_theta / 180.0f;
 218         Vec3 newpos;
 219         newpos.x = cam_pos.x + cos(theta) * dir.x - sin(theta) * dir.z;
 220         newpos.y = cam_pos.y;
 221         newpos.z = cam_pos.z + sin(theta) * dir.x + cos(theta) * dir.z;
 222
 223         if(noclip) {
 224                 cam_pos = newpos;
 225         } else {
 226                 if(!constrain_walk_mesh(newpos, &cam_pos)) {
 227                         float dtheta = M_PI / 32.0;
 228                         float theta = dtheta;
 229                         Vec2 dir2d = newpos.xz() - cam_pos.xz();
 230
 231                         for(int i=0; i<16; i++) {
 232                                 Vec2 dvec = rotate(dir2d, theta);
 233                                 Vec3 pos = cam_pos + Vec3(dvec.x, 0, dvec.y);
 234                                 if(constrain_walk_mesh(pos, &cam_pos)) {
 235                                         break;
 236                                 }
 237                                 dvec = rotate(dir2d, -theta);
 238                                 pos = cam_pos + Vec3(dvec.x, 0, dvec.y);
 239                                 if(constrain_walk_mesh(pos, &cam_pos)) {
 240                                         break;
 241                                 }
 242                                 theta += dtheta;
 243                         }
 244                 }
 245                 floor_y = cam_pos.y - user_eye_height;
 246         }
 247
 248         // calculate mouselook view matrix
 249         mouse_view_matrix = Mat4::identity;
 250         mouse_view_matrix.pre_translate(0, 0, -cam_dist);
 251         if(!have_headtracking) {
 252                 mouse_view_matrix.pre_rotate_x(deg_to_rad(cam_phi));
 253         }
 254         mouse_view_matrix.pre_rotate_y(deg_to_rad(cam_theta));
 255         mouse_view_matrix.pre_translate(-cam_pos.x, -cam_pos.y, -cam_pos.z);
 256 }
 257
 258 static void set_light(int idx, const Vec3 &pos, const Vec3 &color)
 259 {
 260         unsigned int lt = GL_LIGHT0 + idx;
 261         float posv[] = { pos.x, pos.y, pos.z, 1 };
 262         float colv[] = { color.x, color.y, color.z, 1 };
 263
 264         glEnable(lt);
 265         glLightfv(lt, GL_POSITION, posv);
 266         glLightfv(lt, GL_DIFFUSE, colv);
 267         glLightfv(lt, GL_SPECULAR, colv);
 268 }
 269
 270 void app_display()
 271 {
 272         float dt = (float)(time_msec - prev_msec) / 1000.0f;
 273         prev_msec = time_msec;
 274
 275         update(dt);
 276
 277         if(opt.vr) {
 278                 // VR mode
 279                 goatvr_draw_start();
 280                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 281
 282                 for(int i=0; i<2; i++) {
 283                         // for each eye
 284                         goatvr_draw_eye(i);
 285
 286                         proj_matrix = goatvr_projection_matrix(i, NEAR_CLIP, FAR_CLIP);
 287                         glMatrixMode(GL_PROJECTION);
 288                         glLoadMatrixf(proj_matrix[0]);
 289
 290                         view_matrix = mouse_view_matrix * Mat4(goatvr_view_matrix(i));
 291                         glMatrixMode(GL_MODELVIEW);
 292                         glLoadMatrixf(view_matrix[0]);
 293
 294                         draw_scene();
 295                 }
 296                 goatvr_draw_done();
 297
 298                 if(should_swap) {
 299                         app_swap_buffers();
 300                 }
 301
 302         } else {
 303                 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 304
 305                 proj_matrix.perspective(deg_to_rad(50.0), win_aspect, NEAR_CLIP, FAR_CLIP);
 306                 glMatrixMode(GL_PROJECTION);
 307                 glLoadMatrixf(proj_matrix[0]);
 308
 309                 view_matrix = mouse_view_matrix;
 310                 glMatrixMode(GL_MODELVIEW);
 311                 glLoadMatrixf(view_matrix[0]);
 312
 313                 draw_scene();
 314
 315                 if(!fb_srgb && sdr_post_gamma) {
 316                         slow_post(sdr_post_gamma);
 317                         glUseProgram(0);
 318                 }
 319                 app_swap_buffers();
 320         }
 321         assert(glGetError() == GL_NO_ERROR);
 322 }
 323
 324
 325 static void draw_scene()
 326 {
 327         static const Vec3 lpos[] = { Vec3(-50, 75, 100), Vec3(100, 0, 30), Vec3(-10, -10, 60) };
 328         set_light(0, lpos[0], Vec3(1.0, 0.8, 0.7) * 0.8);
 329         set_light(1, lpos[1], Vec3(0.6, 0.7, 1.0) * 0.6);
 330         set_light(2, lpos[2], Vec3(0.8, 1.0, 0.8) * 0.3);
 331
 332         scn->draw();
 333
 334         if(show_walk_mesh && scn->walk_mesh) {
 335                 glPushAttrib(GL_ENABLE_BIT);
 336                 glEnable(GL_BLEND);
 337                 glBlendFunc(GL_ONE, GL_ONE);
 338                 glDisable(GL_LIGHTING);
 339                 glEnable(GL_POLYGON_OFFSET_FILL);
 340
 341                 glUseProgram(0);
 342
 343                 glPolygonOffset(-1, 1);
 344                 glDepthMask(0);
 345
 346                 glColor3f(0.3, 0.08, 0.01);
 347                 scn->walk_mesh->draw();
 348
 349                 glDepthMask(1);
 350
 351                 glPopAttrib();
 352         }
 353
 354         draw_ui();
 355 }
 356
 357
 358 void app_reshape(int x, int y)
 359 {
 360         glViewport(0, 0, x, y);
 361         goatvr_set_fb_size(x, y, 1.0f);
 362 }
 363
 364 void app_keyboard(int key, bool pressed)
 365 {
 366         unsigned int mod = app_get_modifiers();
 367
 368         if(pressed) {
 369                 switch(key) {
 370                 case 27:
 371                         app_quit();
 372                         break;
 373
 374                 case '\n':
 375                 case '\r':
 376                         if(mod & MOD_ALT) {
 377                                 app_toggle_fullscreen();
 378                         }
 379                         break;
 380
 381                 case '`':
 382                         app_toggle_grab_mouse();
 383                         show_message("mouse %s", app_is_mouse_grabbed() ? "grabbed" : "released");
 384                         break;
 385
 386                 case 'w':
 387                         if(mod & MOD_CTRL) {
 388                                 show_walk_mesh = !show_walk_mesh;
 389                                 show_message("walk mesh: %s", show_walk_mesh ? "on" : "off");
 390                         }
 391                         break;
 392
 393                 case 'c':
 394                         if(mod & MOD_CTRL) {
 395                                 noclip = !noclip;
 396                                 show_message(noclip ? "no clip" : "clip");
 397                         }
 398                         break;
 399
 400                 case 'f':
 401                         toggle_flight();
 402                         break;
 403
 404                 case 'p':
 405                         if(mod & MOD_CTRL) {
 406                                 fb_srgb = !fb_srgb;
 407                                 show_message("gamma correction for non-sRGB framebuffers: %s\n", fb_srgb ? "off" : "on");
 408                         }
 409                         break;
 410
 411                 case '=':
 412                         walk_speed *= 1.25;
 413                         show_message("walk speed: %g", walk_speed);
 414                         break;
 415
 416                 case '-':
 417                         walk_speed *= 0.75;
 418                         show_message("walk speed: %g", walk_speed);
 419                         break;
 420
 421                 case ']':
 422                         mouse_speed *= 1.2;
 423                         show_message("mouse speed: %g", mouse_speed);
 424                         break;
 425
 426                 case '[':
 427                         mouse_speed *= 0.8;
 428                         show_message("mouse speed: %g", mouse_speed);
 429                         break;
 430                 }
 431         }
 432
 433         if(key < 256 && !(mod & (MOD_CTRL | MOD_ALT))) {
 434                 keystate[key] = pressed;
 435         }
 436 }
 437
 438 void app_mouse_button(int bn, bool pressed, int x, int y)
 439 {
 440         prev_mx = x;
 441         prev_my = y;
 442         bnstate[bn] = pressed;
 443 }
 444
 445 static inline void mouse_look(float dx, float dy)
 446 {
 447         float scrsz = (float)win_height;
 448         cam_theta += dx * 512.0 / scrsz;
 449         cam_phi += dy * 512.0 / scrsz;
 450
 451         if(cam_phi < -90) cam_phi = -90;
 452         if(cam_phi > 90) cam_phi = 90;
 453 }
 454
 455 static void mouse_zoom(float dx, float dy)
 456 {
 457         cam_dist += dy * 0.1;
 458         if(cam_dist < 0.0) cam_dist = 0.0;
 459 }
 460
 461 void app_mouse_motion(int x, int y)
 462 {
 463         int dx = x - prev_mx;
 464         int dy = y - prev_my;
 465         prev_mx = x;
 466         prev_my = y;
 467
 468         if(!dx && !dy) return;
 469
 470         if(bnstate[0]) {
 471                 mouse_look(dx, dy);
 472         }
 473         if(bnstate[2]) {
 474                 mouse_zoom(dx, dy);
 475         }
 476 }
 477
 478 void app_mouse_delta(int dx, int dy)
 479 {
 480         if(bnstate[2]) {
 481                 mouse_zoom(dx * mouse_speed, dy * mouse_speed);
 482         } else {
 483                 mouse_look(dx * mouse_speed, dy * mouse_speed);
 484         }
 485 }
 486
 487 void app_gamepad_axis(int axis, float val)
 488 {
 489         switch(axis) {
 490         case 0:
 491                 joy_move.x = val;
 492                 break;
 493         case 1:
 494                 joy_move.y = val;
 495                 break;
 496
 497         case 2:
 498                 joy_look.x = val;
 499                 break;
 500         case 3:
 501                 joy_look.y = val;
 502                 break;
 503         }
 504 }
 505
 506 void app_gamepad_button(int bn, bool pressed)
 507 {
 508         gpad_bnstate[bn] = pressed;
 509
 510         if(pressed) {
 511                 switch(bn) {
 512                 case GPAD_LSTICK:
 513                         toggle_flight();
 514                         break;
 515
 516                 default:
 517                         break;
 518                 }
 519         }
 520 }
 521
 522 static void toggle_flight()
 523 {
 524         static float prev_walk_speed = -1.0;
 525         if(prev_walk_speed < 0.0) {
 526                 noclip = true;
 527                 prev_walk_speed = walk_speed;
 528                 walk_speed = 1000.0;
 529                 show_message("fly mode\n");
 530         } else {
 531                 noclip = false;
 532                 walk_speed = prev_walk_speed;
 533                 prev_walk_speed = -1.0;
 534                 show_message("walk mode\n");
 535         }
 536 }