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