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