git.mutantstargoat.com Git - retroray/blob - src/scr_mod.c

   1 /*
   2 RetroRay - integrated standalone vintage modeller/renderer
   3 Copyright (C) 2023  John Tsiombikas <nuclear@mutantstargoat.com>
   4
   5 This program is free software: you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation, either version 3 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program.  If not, see <https://www.gnu.org/licenses/>.
  17 */
  18 #include <assert.h>
  19 #include "gaw/gaw.h"
  20 #include "app.h"
  21 #include "rtk.h"
  22 #include "scene.h"
  23 #include "geom.h"
  24 #include "cmesh.h"
  25 #include "meshgen.h"
  26 #include "font.h"
  27 #include "rend.h"
  28
  29 enum {
  30         TBN_NEW, TBN_OPEN, TBN_SAVE, TBN_SEP1,
  31         TBN_SEL, TBN_MOVE, TBN_ROT, TBN_SCALE, TBN_SEP2,
  32         TBN_ADD, TBN_RM, TBN_SEP3,
  33         TBN_UNION, TBN_ISECT, TBN_DIFF, TBN_SEP4,
  34         TBN_MTL, TBN_REND, TBN_REND_AREA, TBN_VIEWREND, TBN_SEP5, TBN_CFG,
  35
  36         NUM_TOOL_BUTTONS
  37 };
  38 static const char *tbn_icon_name[] = {
  39         "new", "open", "save", 0,
  40         "sel", "move", "rot", "scale", 0,
  41         "add", "remove", 0,
  42         "union", "isect", "diff", 0,
  43         "mtl", "rend", "rend-area", "viewrend", 0, "cfg"
  44 };
  45 static int tbn_icon_pos[][2] = {
  46         {0,0}, {16,0}, {32,0}, {-1,-1},
  47         {48,0}, {64,0}, {80,0}, {96,0}, {-1,-1},
  48         {112,0}, {112,16}, {-1,-1},
  49         {0,16}, {16,16}, {32,16}, {-1,-1},
  50         {48,16}, {64,16}, {64, 32}, {80,16}, {-1,-1}, {96,16}
  51 };
  52 static int tbn_istool[] = {
  53         0, 0, 0, 0,
  54         1, 1, 1, 1, 0,
  55         0, 0, 0,
  56         1, 1, 1, 0,
  57         0, 0, 1, 0, 0, 0
  58 };
  59 static rtk_icon *tbn_icons[NUM_TOOL_BUTTONS];
  60 static rtk_widget *tbn_buttons[NUM_TOOL_BUTTONS];
  61
  62 #define TOOLBAR_HEIGHT  26
  63
  64 enum {
  65         TOOL_SEL, TOOL_MOVE, TOOL_ROT, TOOL_SCALE,
  66         TOOL_UNION, TOOL_ISECT, TOOL_DIFF, TOOL_REND_AREA,
  67         NUM_TOOLS
  68 };
  69 static rtk_widget *tools[NUM_TOOLS];
  70
  71
  72 static int mdl_init(void);
  73 static void mdl_destroy(void);
  74 static int mdl_start(void);
  75 static void mdl_stop(void);
  76 static void mdl_display(void);
  77 static void mdl_reshape(int x, int y);
  78 static void mdl_keyb(int key, int press);
  79 static void mdl_mouse(int bn, int press, int x, int y);
  80 static void mdl_motion(int x, int y);
  81
  82 static void draw_object(struct object *obj);
  83 static void setup_material(struct material *mtl);
  84 static void draw_grid(void);
  85 static void tbn_callback(rtk_widget *w, void *cls);
  86
  87 static void act_settool(int tidx);
  88 static void act_addobj(void);
  89 static void act_rmobj(void);
  90
  91 static void fix_rect(rtk_rect *rect);
  92 static void draw_rband(void);
  93 static void moveobj(struct object *obj, int px0, int py0, int px1, int py1);
  94
  95
  96 struct app_screen scr_model = {
  97         "modeller",
  98         mdl_init, mdl_destroy,
  99         mdl_start, mdl_stop,
 100         mdl_display, mdl_reshape,
 101         mdl_keyb, mdl_mouse, mdl_motion
 102 };
 103
 104 static rtk_widget *toolbar;
 105 static rtk_iconsheet *icons;
 106
 107 static struct cmesh *mesh_sph;
 108
 109 static float cam_theta, cam_phi = 20, cam_dist = 8;
 110 static float view_matrix[16], proj_matrix[16];
 111 static float view_matrix_inv[16], proj_matrix_inv[16];
 112 static int viewport[4];
 113 static cgm_ray pickray;
 114
 115 static int cur_tool, prev_tool = -1;
 116 static int selobj = -1;
 117
 118 static rtk_rect rband;
 119 static int rband_valid;
 120
 121 static int rendering;
 122
 123
 124 static int mdl_init(void)
 125 {
 126         int i, toolidx;
 127         rtk_widget *w;
 128
 129         if(!(icons = rtk_load_iconsheet("data/icons.png"))) {
 130                 errormsg("failed to load iconsheet\n");
 131                 return -1;
 132         }
 133         for(i=0; i<NUM_TOOL_BUTTONS; i++) {
 134                 if(tbn_icon_name[i]) {
 135                         tbn_icons[i] = rtk_define_icon(icons, tbn_icon_name[i],
 136                                         tbn_icon_pos[i][0], tbn_icon_pos[i][1], 16, 16);
 137                 } else {
 138                         tbn_icons[i] = 0;
 139                 }
 140         }
 141
 142         if(!(toolbar = rtk_create_window(0, "toolbar", 0, 0, win_width, TOOLBAR_HEIGHT))) {
 143                 return -1;
 144         }
 145         rtk_win_layout(toolbar, RTK_HBOX);
 146
 147         toolidx = 0;
 148         for(i=0; i<NUM_TOOL_BUTTONS; i++) {
 149                 if(!tbn_icons[i]) {
 150                         rtk_create_separator(toolbar);
 151                 } else {
 152                         if(!(w = rtk_create_iconbutton(toolbar, tbn_icons[i], 0))) {
 153                                 return -1;
 154                         }
 155                         tbn_buttons[i] = w;
 156                         rtk_set_callback(w, tbn_callback, (void*)(intptr_t)i);
 157                         if(tbn_istool[i]) {
 158                                 rtk_bn_mode(w, RTK_TOGGLEBN);
 159                                 tools[toolidx++] = w;
 160                         }
 161                         if(i == TBN_SEL) {
 162                                 rtk_set_value(w, 1);
 163                         }
 164                 }
 165         }
 166         assert(toolidx == NUM_TOOLS);
 167
 168         if(!(mesh_sph = cmesh_alloc())) {
 169                 errormsg("failed to allocate sphere vis mesh\n");
 170                 return -1;
 171         }
 172         gen_sphere(mesh_sph, 1.0f, 16, 8, 1.0f, 1.0f);
 173         return 0;
 174 }
 175
 176 static void mdl_destroy(void)
 177 {
 178         cmesh_free(mesh_sph);
 179         rtk_free_iconsheet(icons);
 180 }
 181
 182 static int mdl_start(void)
 183 {
 184         gaw_clear_color(0.125, 0.125, 0.125, 1);
 185
 186         gaw_enable(GAW_DEPTH_TEST);
 187         gaw_enable(GAW_CULL_FACE);
 188         gaw_enable(GAW_LIGHTING);
 189         gaw_enable(GAW_LIGHT0);
 190
 191         rend_pan(0, -TOOLBAR_HEIGHT);
 192         return 0;
 193 }
 194
 195 static void mdl_stop(void)
 196 {
 197 }
 198
 199 static void mdl_display(void)
 200 {
 201         int i, num;
 202         static int frameno;
 203
 204         gaw_clear(GAW_COLORBUF | GAW_DEPTHBUF);
 205
 206         rtk_draw_widget(toolbar);
 207
 208         gaw_matrix_mode(GAW_MODELVIEW);
 209         gaw_load_identity();
 210         gaw_translate(0, 0, -cam_dist);
 211         gaw_rotate(cam_phi, 1, 0, 0);
 212         gaw_rotate(cam_theta, 0, 1, 0);
 213         gaw_get_modelview(view_matrix);
 214         cgm_mcopy(view_matrix_inv, view_matrix);
 215         cgm_minverse(view_matrix_inv);
 216
 217         draw_grid();
 218
 219         num = scn_num_objects(scn);
 220         for(i=0; i<num; i++) {
 221                 setup_material(scn->objects[i]->mtl);
 222
 223                 if(i == selobj) {
 224                         gaw_zoffset(1);
 225                         gaw_enable(GAW_POLYGON_OFFSET);
 226                         draw_object(scn->objects[i]);
 227                         gaw_disable(GAW_POLYGON_OFFSET);
 228
 229                         gaw_save();
 230                         gaw_disable(GAW_LIGHTING);
 231                         gaw_poly_wire();
 232                         gaw_color3f(0, 1, 0);
 233                         draw_object(scn->objects[i]);
 234                         gaw_poly_gouraud();
 235                         gaw_restore();
 236                 } else {
 237                         draw_object(scn->objects[i]);
 238                 }
 239         }
 240
 241         if(rendering) {
 242                 if(render(framebuf)) {
 243                         app_redisplay();
 244                 } else {
 245                         rendering = 0;
 246                 }
 247         }
 248
 249         use_font(uifont);
 250         dtx_position(550, 475);
 251         dtx_color(0.3, 0.3, 0.1, 1);
 252         dtx_printf("update: %ld", frameno++);
 253
 254         if(rband_valid) {
 255                 draw_rband();
 256         }
 257 }
 258
 259 static void draw_object(struct object *obj)
 260 {
 261         struct sphere *sph;
 262
 263         if(!obj->xform_valid) {
 264                 calc_object_matrix(obj);
 265         }
 266         gaw_push_matrix();
 267         gaw_mult_matrix(obj->xform);
 268
 269         switch(obj->type) {
 270         case OBJ_SPHERE:
 271                 sph = (struct sphere*)obj;
 272                 gaw_scale(sph->rad, sph->rad, sph->rad);
 273                 cmesh_draw(mesh_sph);
 274                 break;
 275
 276         default:
 277                 break;
 278         }
 279
 280         gaw_pop_matrix();
 281 }
 282
 283 static void setup_material(struct material *mtl)
 284 {
 285         gaw_mtl_diffuse(mtl->kd.x, mtl->kd.y, mtl->kd.z, 1.0f);
 286         gaw_mtl_specular(mtl->ks.x, mtl->ks.y, mtl->ks.z, mtl->shin);
 287         gaw_mtl_emission(mtl->ke.x, mtl->ke.y, mtl->ke.z);
 288 }
 289
 290 static void draw_grid(void)
 291 {
 292         gaw_save();
 293         gaw_disable(GAW_LIGHTING);
 294
 295         gaw_begin(GAW_LINES);
 296         gaw_color3f(0.5, 0, 0);
 297         gaw_vertex3f(0, 0, 0);
 298         gaw_vertex3f(-100, 0, 0);
 299         gaw_vertex3f(0, 0, 0);
 300         gaw_vertex3f(100, 0, 0);
 301         gaw_color3f(0, 0.5, 0);
 302         gaw_vertex3f(0, 0, 0);
 303         gaw_vertex3f(0, 0, -100);
 304         gaw_vertex3f(0, 0, 0);
 305         gaw_vertex3f(0, 0, 100);
 306         gaw_end();
 307
 308         gaw_restore();
 309 }
 310
 311 static void mdl_reshape(int x, int y)
 312 {
 313         float aspect = (float)x / (float)(y - TOOLBAR_HEIGHT);
 314
 315         viewport[0] = 0;
 316         viewport[1] = TOOLBAR_HEIGHT;
 317         viewport[2] = x;
 318         viewport[3] = y - TOOLBAR_HEIGHT;
 319         gaw_viewport(viewport[0], viewport[1], viewport[2], viewport[3]);
 320
 321         gaw_matrix_mode(GAW_PROJECTION);
 322         gaw_load_identity();
 323         gaw_perspective(50, aspect, 0.5, 100.0);
 324         gaw_get_projection(proj_matrix);
 325         cgm_mcopy(proj_matrix_inv, proj_matrix);
 326         cgm_minverse(proj_matrix_inv);
 327
 328         rtk_resize(toolbar, win_width, TOOLBAR_HEIGHT);
 329 }
 330
 331 static void mdl_keyb(int key, int press)
 332 {
 333         if(rtk_input_key(toolbar, key, press)) {
 334                 app_redisplay();
 335                 return;
 336         }
 337
 338         if(press) {
 339                 switch(key) {
 340                 case 27:
 341                         act_settool(TOOL_SEL);
 342                         break;
 343                 case 'g':
 344                         act_settool(TOOL_MOVE);
 345                         break;
 346                 case 'r':
 347                         act_settool(TOOL_ROT);
 348                         break;
 349                 case 's':
 350                         act_settool(TOOL_SCALE);
 351                         break;
 352
 353                 case KEY_DEL:
 354                         act_rmobj();
 355                         break;
 356
 357                 default:
 358                         break;
 359                 }
 360         }
 361 }
 362
 363 static int vpdrag;
 364
 365 static void mdl_mouse(int bn, int press, int x, int y)
 366 {
 367         struct rayhit hit;
 368         if(!vpdrag && rtk_input_mbutton(toolbar, bn, press, x, y)) {
 369                 app_redisplay();
 370                 return;
 371         }
 372
 373         if(press) {
 374                 rband_valid = 0;
 375                 rband.x = x;
 376                 rband.y = y;
 377                 vpdrag |= (1 << bn);
 378         } else {
 379                 vpdrag &= ~(1 << bn);
 380
 381                 if(rband_valid) {
 382                         rband_valid = 0;
 383
 384                         if(cur_tool == TOOL_REND_AREA) {
 385                                 if(prev_tool >= 0) {
 386                                         act_settool(prev_tool);
 387                                 }
 388                                 rendering = 1;
 389                                 rend_size(win_width, win_height);
 390                                 fix_rect(&rband);
 391                                 rend_begin(rband.x, rband.y, rband.width, rband.height);
 392                         }
 393
 394                 } else if(bn == 0 && x == rband.x && y == rband.y) {
 395                         primray(&pickray, x, y);
 396                         if(scn_intersect(scn, &pickray, &hit)) {
 397                                 selobj = scn_object_index(scn, hit.obj);
 398                         } else {
 399                                 selobj = -1;
 400                         }
 401                 }
 402                 app_redisplay();
 403         }
 404 }
 405
 406 static void mdl_motion(int x, int y)
 407 {
 408         int dx, dy;
 409
 410         if(!vpdrag && rtk_input_mmotion(toolbar, x, y)) {
 411                 app_redisplay();
 412                 return;
 413         }
 414
 415         dx = x - mouse_x;
 416         dy = y - mouse_y;
 417
 418         if(modkeys) {
 419                 /* navigation */
 420                 if(mouse_state[0]) {
 421                         cam_theta += dx * 0.5f;
 422                         cam_phi += dy * 0.5f;
 423                         if(cam_phi < -90) cam_phi = -90;
 424                         if(cam_phi > 90) cam_phi = 90;
 425                         app_redisplay();
 426                 }
 427
 428                 if(mouse_state[2]) {
 429                         cam_dist += dy * 0.1f;
 430                         if(cam_dist < 0) cam_dist = 0;
 431                         app_redisplay();
 432                 }
 433         } else {
 434                 if(mouse_state[0]) {
 435                         switch(cur_tool) {
 436                         case TOOL_SEL:
 437                         case TOOL_REND_AREA:
 438                                 if(rband.x != x || rband.y != y) {
 439                                         rband.width = x - rband.x;
 440                                         rband.height = y - rband.y;
 441                                         rband_valid = 1;
 442                                 }
 443                                 break;
 444
 445                         case TOOL_MOVE:
 446                                 if(selobj >= 0) {
 447                                         struct object *obj = scn->objects[selobj];
 448                                         moveobj(obj, mouse_x, mouse_y, x, y);
 449                                 }
 450                                 break;
 451
 452                         default:
 453                                 break;
 454                         }
 455                         app_redisplay();
 456                 }
 457         }
 458 }
 459
 460 static void add_sphere(void)
 461 {
 462         struct object *obj;
 463
 464         if(!(obj = create_object(OBJ_SPHERE))) {
 465                 return;
 466         }
 467         scn_add_object(scn, obj);
 468 }
 469
 470 static void tbn_callback(rtk_widget *w, void *cls)
 471 {
 472         int id = (intptr_t)cls;
 473
 474         switch(id) {
 475         case TBN_SEL:
 476         case TBN_MOVE:
 477         case TBN_ROT:
 478         case TBN_SCALE:
 479                 act_settool(id - TBN_SEL);
 480                 break;
 481         case TBN_UNION:
 482         case TBN_ISECT:
 483         case TBN_DIFF:
 484                 act_settool(id - TBN_UNION + TOOL_UNION);
 485                 break;
 486         case TBN_REND_AREA:
 487                 act_settool(TOOL_REND_AREA);
 488                 break;
 489
 490         case TBN_ADD:
 491                 act_addobj();
 492                 break;
 493
 494         case TBN_RM:
 495                 act_rmobj();
 496                 break;
 497
 498         default:
 499                 break;
 500         }
 501 }
 502
 503 static void act_settool(int tidx)
 504 {
 505         int i;
 506         prev_tool = cur_tool;
 507         cur_tool = tidx;
 508         for(i=0; i<NUM_TOOLS; i++) {
 509                 if(i == cur_tool) {
 510                         rtk_set_value(tools[i], 1);
 511                 } else {
 512                         rtk_set_value(tools[i], 0);
 513                 }
 514         }
 515         app_redisplay();
 516 }
 517
 518 static void act_addobj(void)
 519 {
 520         int idx = scn_num_objects(scn);
 521         add_sphere();
 522         selobj = idx;
 523
 524         app_redisplay();
 525 }
 526
 527 static void act_rmobj(void)
 528 {
 529         if(selobj >= 0) {
 530                 scn_rm_object(scn, selobj);
 531                 selobj = -1;
 532                 app_redisplay();
 533         }
 534 }
 535
 536 static void fix_rect(rtk_rect *rect)
 537 {
 538         int x, y, w, h;
 539
 540         x = rband.x;
 541         y = rband.y;
 542
 543         if(rband.width < 0) {
 544                 w = -rband.width;
 545                 x += rband.width;
 546         } else {
 547                 w = rband.width;
 548         }
 549         if(rband.height < 0) {
 550                 h = -rband.height;
 551                 y += rband.height;
 552         } else {
 553                 h = rband.height;
 554         }
 555
 556         rect->x = x;
 557         rect->y = y;
 558         rect->width = w;
 559         rect->height = h;
 560 }
 561
 562 static void draw_rband(void)
 563 {
 564         int i;
 565         rtk_rect rect;
 566         uint32_t *fbptr, *bptr;
 567
 568         rect = rband;
 569         fix_rect(&rect);
 570
 571         fbptr = framebuf + rect.y * win_width + rect.x;
 572         bptr = fbptr + win_width * (rect.height - 1);
 573
 574         for(i=0; i<rect.width; i++) {
 575                 fbptr[i] ^= 0xffffff;
 576                 bptr[i] ^= 0xffffff;
 577         }
 578         fbptr += win_width;
 579         for(i=0; i<rect.height-2; i++) {
 580                 fbptr[0] ^= 0xffffff;
 581                 fbptr[rect.width - 1] ^= 0xffffff;
 582                 fbptr += win_width;
 583         }
 584 }
 585
 586 void primray(cgm_ray *ray, int x, int y)
 587 {
 588         float nx, ny;
 589         cgm_vec3 npos, farpt;
 590         float inv_pv[16];
 591
 592         y = win_height - y;
 593         nx = (float)(x - viewport[0]) / (float)viewport[2];
 594         ny = (float)(y - viewport[1]) / (float)viewport[3];
 595
 596         cgm_mcopy(inv_pv, proj_matrix_inv);
 597         cgm_mmul(inv_pv, view_matrix_inv);
 598
 599         cgm_vcons(&npos, nx, ny, 0.0f);
 600         cgm_unproject(&ray->origin, &npos, inv_pv);
 601         npos.z = 1.0f;
 602         cgm_unproject(&farpt, &npos, inv_pv);
 603
 604         ray->dir.x = farpt.x - ray->origin.x;
 605         ray->dir.y = farpt.y - ray->origin.y;
 606         ray->dir.z = farpt.z - ray->origin.z;
 607 }
 608
 609 static void moveobj(struct object *obj, int px0, int py0, int px1, int py1)
 610 {
 611         cgm_ray ray;
 612         float dist;
 613         cgm_vec3 p0, p1;
 614
 615         primray(&ray, px0, py0);
 616         cgm_vnormalize(&ray.dir);
 617         dist = ray_object_dist(&ray, obj);
 618         cgm_raypos(&p0, &ray, dist);
 619         primray(&ray, px1, py1);
 620         cgm_vnormalize(&ray.dir);
 621         cgm_raypos(&p1, &ray, dist);
 622
 623         cgm_vsub(&p1, &p0);
 624         cgm_vadd(&obj->pos, &p1);
 625         obj->xform_valid = 0;
 626 }