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 static int vpdirty;
  72
  73
  74 static int mdl_init(void);
  75 static void mdl_destroy(void);
  76 static int mdl_start(void);
  77 static void mdl_stop(void);
  78 static void mdl_display(void);
  79 static void mdl_reshape(int x, int y);
  80 static void mdl_keyb(int key, int press);
  81 static void mdl_mouse(int bn, int press, int x, int y);
  82 static void mdl_motion(int x, int y);
  83
  84 static void draw_object(struct object *obj);
  85 static void setup_material(struct material *mtl);
  86 static void draw_grid(void);
  87 static void tbn_callback(rtk_widget *w, void *cls);
  88
  89 static void act_settool(int tidx);
  90 static void act_addobj(void);
  91 static void act_rmobj(void);
  92
  93 static void draw_rband(void);
  94 static void moveobj(struct object *obj, int px0, int py0, int px1, int py1);
  95
  96 static void inval_vport(void);
  97
  98
  99 struct app_screen scr_model = {
 100         "modeller",
 101         mdl_init, mdl_destroy,
 102         mdl_start, mdl_stop,
 103         mdl_display, mdl_reshape,
 104         mdl_keyb, mdl_mouse, mdl_motion
 105 };
 106
 107 static rtk_widget *toolbar;
 108 static rtk_iconsheet *icons;
 109
 110 static struct cmesh *mesh_sph;
 111
 112 static float cam_theta, cam_phi = 20, cam_dist = 8;
 113 static float view_matrix[16], proj_matrix[16];
 114 static float view_matrix_inv[16], proj_matrix_inv[16];
 115 static int viewport[4];
 116 static cgm_ray pickray;
 117
 118 static int cur_tool, prev_tool = -1;
 119 static int selobj = -1;
 120
 121 static rtk_rect rband;
 122 static int rband_valid;
 123
 124 static int rendering;
 125 static rtk_rect rendrect;
 126
 127
 128 static int mdl_init(void)
 129 {
 130         int i, toolidx;
 131         rtk_widget *w;
 132
 133         if(!(icons = rtk_load_iconsheet("data/icons.png"))) {
 134                 errormsg("failed to load iconsheet\n");
 135                 return -1;
 136         }
 137         for(i=0; i<NUM_TOOL_BUTTONS; i++) {
 138                 if(tbn_icon_name[i]) {
 139                         tbn_icons[i] = rtk_define_icon(icons, tbn_icon_name[i],
 140                                         tbn_icon_pos[i][0], tbn_icon_pos[i][1], 16, 16);
 141                 } else {
 142                         tbn_icons[i] = 0;
 143                 }
 144         }
 145
 146         if(!(toolbar = rtk_create_window(0, "toolbar", 0, 0, win_width, TOOLBAR_HEIGHT))) {
 147                 return -1;
 148         }
 149         rtk_win_layout(toolbar, RTK_HBOX);
 150
 151         toolidx = 0;
 152         for(i=0; i<NUM_TOOL_BUTTONS; i++) {
 153                 if(!tbn_icons[i]) {
 154                         rtk_create_separator(toolbar);
 155                 } else {
 156                         if(!(w = rtk_create_iconbutton(toolbar, tbn_icons[i], 0))) {
 157                                 return -1;
 158                         }
 159                         tbn_buttons[i] = w;
 160                         rtk_set_callback(w, tbn_callback, (void*)(intptr_t)i);
 161                         if(tbn_istool[i]) {
 162                                 rtk_bn_mode(w, RTK_TOGGLEBN);
 163                                 tools[toolidx++] = w;
 164                         }
 165                         if(i == TBN_SEL) {
 166                                 rtk_set_value(w, 1);
 167                         }
 168                 }
 169         }
 170         assert(toolidx == NUM_TOOLS);
 171
 172         if(!(mesh_sph = cmesh_alloc())) {
 173                 errormsg("failed to allocate sphere vis mesh\n");
 174                 return -1;
 175         }
 176         gen_sphere(mesh_sph, 1.0f, 16, 8, 1.0f, 1.0f);
 177
 178         vpdirty = 1;
 179         return 0;
 180 }
 181
 182 static void mdl_destroy(void)
 183 {
 184         cmesh_free(mesh_sph);
 185         rtk_free_iconsheet(icons);
 186 }
 187
 188 static int mdl_start(void)
 189 {
 190         gaw_clear_color(0.125, 0.125, 0.125, 1);
 191
 192         gaw_enable(GAW_DEPTH_TEST);
 193         gaw_enable(GAW_CULL_FACE);
 194         gaw_enable(GAW_LIGHTING);
 195         gaw_enable(GAW_LIGHT0);
 196
 197         rend_pan(0, -TOOLBAR_HEIGHT);
 198         return 0;
 199 }
 200
 201 static void mdl_stop(void)
 202 {
 203 }
 204
 205 static void mdl_display(void)
 206 {
 207         int i, num;
 208
 209         /* viewport */
 210         if(vpdirty) {
 211                 gaw_clear(GAW_COLORBUF | GAW_DEPTHBUF);
 212
 213                 gaw_matrix_mode(GAW_MODELVIEW);
 214                 gaw_load_identity();
 215                 gaw_translate(0, 0, -cam_dist);
 216                 gaw_rotate(cam_phi, 1, 0, 0);
 217                 gaw_rotate(cam_theta, 0, 1, 0);
 218                 gaw_get_modelview(view_matrix);
 219                 cgm_mcopy(view_matrix_inv, view_matrix);
 220                 cgm_minverse(view_matrix_inv);
 221
 222                 draw_grid();
 223
 224                 num = scn_num_objects(scn);
 225                 for(i=0; i<num; i++) {
 226                         setup_material(scn->objects[i]->mtl);
 227
 228                         if(i == selobj) {
 229                                 gaw_zoffset(1);
 230                                 gaw_enable(GAW_POLYGON_OFFSET);
 231                                 draw_object(scn->objects[i]);
 232                                 gaw_disable(GAW_POLYGON_OFFSET);
 233
 234                                 gaw_save();
 235                                 gaw_disable(GAW_LIGHTING);
 236                                 gaw_poly_wire();
 237                                 gaw_color3f(0, 1, 0);
 238                                 draw_object(scn->objects[i]);
 239                                 gaw_poly_gouraud();
 240                                 gaw_restore();
 241                         } else {
 242                                 draw_object(scn->objects[i]);
 243                         }
 244                 }
 245                 vpdirty = 0;
 246
 247                 /* dirty all GUI windows */
 248                 rtk_invalidate(toolbar);
 249         }
 250
 251         /* render layer */
 252         if(rendering) {
 253                 if(!render(framebuf)) {
 254                         rendering = 0;
 255                 }
 256                 app_redisplay(rendrect.x, rendrect.y, rendrect.width, rendrect.height);
 257         }
 258
 259         /* GUI */
 260         rtk_draw_widget(toolbar);
 261 }
 262
 263 static void draw_object(struct object *obj)
 264 {
 265         struct sphere *sph;
 266
 267         if(!obj->xform_valid) {
 268                 calc_object_matrix(obj);
 269         }
 270         gaw_push_matrix();
 271         gaw_mult_matrix(obj->xform);
 272
 273         switch(obj->type) {
 274         case OBJ_SPHERE:
 275                 sph = (struct sphere*)obj;
 276                 gaw_scale(sph->rad, sph->rad, sph->rad);
 277                 cmesh_draw(mesh_sph);
 278                 break;
 279
 280         default:
 281                 break;
 282         }
 283
 284         gaw_pop_matrix();
 285 }
 286
 287 static void setup_material(struct material *mtl)
 288 {
 289         gaw_mtl_diffuse(mtl->kd.x, mtl->kd.y, mtl->kd.z, 1.0f);
 290         gaw_mtl_specular(mtl->ks.x, mtl->ks.y, mtl->ks.z, mtl->shin);
 291         gaw_mtl_emission(mtl->ke.x, mtl->ke.y, mtl->ke.z);
 292 }
 293
 294 static void draw_grid(void)
 295 {
 296         gaw_save();
 297         gaw_disable(GAW_LIGHTING);
 298
 299         gaw_begin(GAW_LINES);
 300         gaw_color3f(0.5, 0, 0);
 301         gaw_vertex3f(0, 0, 0);
 302         gaw_vertex3f(-100, 0, 0);
 303         gaw_vertex3f(0, 0, 0);
 304         gaw_vertex3f(100, 0, 0);
 305         gaw_color3f(0, 0.5, 0);
 306         gaw_vertex3f(0, 0, 0);
 307         gaw_vertex3f(0, 0, -100);
 308         gaw_vertex3f(0, 0, 0);
 309         gaw_vertex3f(0, 0, 100);
 310         gaw_end();
 311
 312         gaw_restore();
 313 }
 314
 315 static void mdl_reshape(int x, int y)
 316 {
 317         float aspect = (float)x / (float)(y - TOOLBAR_HEIGHT);
 318
 319         viewport[0] = 0;
 320         viewport[1] = TOOLBAR_HEIGHT;
 321         viewport[2] = x;
 322         viewport[3] = y - TOOLBAR_HEIGHT;
 323         gaw_viewport(viewport[0], viewport[1], viewport[2], viewport[3]);
 324
 325         gaw_matrix_mode(GAW_PROJECTION);
 326         gaw_load_identity();
 327         gaw_perspective(50, aspect, 0.5, 100.0);
 328         gaw_get_projection(proj_matrix);
 329         cgm_mcopy(proj_matrix_inv, proj_matrix);
 330         cgm_minverse(proj_matrix_inv);
 331
 332         rtk_resize(toolbar, win_width, TOOLBAR_HEIGHT);
 333 }
 334
 335 static void mdl_keyb(int key, int press)
 336 {
 337         if(rtk_input_key(toolbar, key, press)) {
 338                 return;
 339         }
 340
 341         if(press) {
 342                 switch(key) {
 343                 case 27:
 344                         act_settool(TOOL_SEL);
 345                         break;
 346                 case 'g':
 347                         act_settool(TOOL_MOVE);
 348                         break;
 349                 case 'r':
 350                         act_settool(TOOL_ROT);
 351                         break;
 352                 case 's':
 353                         act_settool(TOOL_SCALE);
 354                         break;
 355
 356                 case KEY_F6:
 357                         act_settool(TOOL_REND_AREA);
 358                         break;
 359
 360                 case KEY_DEL:
 361                         act_rmobj();
 362                         break;
 363
 364                 default:
 365                         break;
 366                 }
 367         }
 368 }
 369
 370 static int vpdrag;
 371
 372 static void mdl_mouse(int bn, int press, int x, int y)
 373 {
 374         struct rayhit hit;
 375         if(!vpdrag && rtk_input_mbutton(toolbar, bn, press, x, y)) {
 376                 return;
 377         }
 378
 379         if(press) {
 380                 rband_valid = 0;
 381                 rband.x = x;
 382                 rband.y = y;
 383                 vpdrag |= (1 << bn);
 384         } else {
 385                 vpdrag &= ~(1 << bn);
 386
 387                 if(rband_valid) {
 388                         rband_valid = 0;
 389                         app_rband(0, 0, 0, 0);
 390
 391                         if(cur_tool == TOOL_REND_AREA) {
 392                                 if(prev_tool >= 0) {
 393                                         act_settool(prev_tool);
 394                                 }
 395                                 rendering = 1;
 396                                 rend_size(win_width, win_height);
 397                                 rtk_fix_rect(&rband);
 398                                 rendrect = rband;
 399                                 rend_begin(rband.x, rband.y, rband.width, rband.height);
 400                         }
 401                         app_redisplay(rband.x, rband.y, rband.width, rband.height);
 402
 403                 } else if(bn == 0 && x == rband.x && y == rband.y) {
 404                         primray(&pickray, x, y);
 405                         if(scn_intersect(scn, &pickray, &hit)) {
 406                                 int newsel = scn_object_index(scn, hit.obj);
 407                                 if(newsel != selobj) {
 408                                         selobj = newsel;
 409                                         inval_vport();
 410                                 }
 411                         } else {
 412                                 if(selobj != -1) {
 413                                         inval_vport();
 414                                 }
 415                                 selobj = -1;
 416                         }
 417                 }
 418         }
 419 }
 420
 421 static void mdl_motion(int x, int y)
 422 {
 423         int dx, dy;
 424
 425         if(!vpdrag && rtk_input_mmotion(toolbar, x, y)) {
 426                 return;
 427         }
 428
 429         dx = x - mouse_x;
 430         dy = y - mouse_y;
 431
 432         if(modkeys) {
 433                 /* navigation */
 434                 if(mouse_state[0]) {
 435                         cam_theta += dx * 0.5f;
 436                         cam_phi += dy * 0.5f;
 437                         if(cam_phi < -90) cam_phi = -90;
 438                         if(cam_phi > 90) cam_phi = 90;
 439                         inval_vport();
 440                 }
 441
 442                 if(mouse_state[2]) {
 443                         cam_dist += dy * 0.1f;
 444                         if(cam_dist < 0) cam_dist = 0;
 445                         inval_vport();
 446                 }
 447         } else {
 448                 if(mouse_state[0]) {
 449                         switch(cur_tool) {
 450                         case TOOL_SEL:
 451                         case TOOL_REND_AREA:
 452                                 if(rband.x != x || rband.y != y) {
 453                                         rband.width = x - rband.x;
 454                                         rband.height = y - rband.y;
 455                                         rband_valid = 1;
 456                                         app_rband(rband.x, rband.y, rband.width, rband.height);
 457                                 }
 458                                 break;
 459
 460                         case TOOL_MOVE:
 461                                 if(selobj >= 0) {
 462                                         struct object *obj = scn->objects[selobj];
 463                                         moveobj(obj, mouse_x, mouse_y, x, y);
 464                                 }
 465                                 break;
 466
 467                         default:
 468                                 break;
 469                         }
 470                 }
 471         }
 472 }
 473
 474 static void add_sphere(void)
 475 {
 476         struct object *obj;
 477
 478         if(!(obj = create_object(OBJ_SPHERE))) {
 479                 return;
 480         }
 481         scn_add_object(scn, obj);
 482 }
 483
 484 static void tbn_callback(rtk_widget *w, void *cls)
 485 {
 486         int id = (intptr_t)cls;
 487
 488         switch(id) {
 489         case TBN_SEL:
 490         case TBN_MOVE:
 491         case TBN_ROT:
 492         case TBN_SCALE:
 493                 act_settool(id - TBN_SEL);
 494                 break;
 495         case TBN_UNION:
 496         case TBN_ISECT:
 497         case TBN_DIFF:
 498                 act_settool(id - TBN_UNION + TOOL_UNION);
 499                 break;
 500         case TBN_REND_AREA:
 501                 act_settool(TOOL_REND_AREA);
 502                 break;
 503
 504         case TBN_ADD:
 505                 act_addobj();
 506                 break;
 507
 508         case TBN_RM:
 509                 act_rmobj();
 510                 break;
 511
 512         default:
 513                 break;
 514         }
 515 }
 516
 517 static void act_settool(int tidx)
 518 {
 519         int i;
 520         rtk_rect r;
 521
 522         prev_tool = cur_tool;
 523         cur_tool = tidx;
 524         for(i=0; i<NUM_TOOLS; i++) {
 525                 if(i == cur_tool) {
 526                         if(!rtk_get_value(tools[i])) {
 527                                 rtk_set_value(tools[i], 1);
 528                                 rtk_get_rect(tools[i], &r);
 529                         }
 530                 } else {
 531                         if(rtk_get_value(tools[i])) {
 532                                 rtk_set_value(tools[i], 0);
 533                                 rtk_get_rect(tools[i], &r);
 534                         }
 535                 }
 536         }
 537 }
 538
 539 static void act_addobj(void)
 540 {
 541         int idx = scn_num_objects(scn);
 542         add_sphere();
 543         selobj = idx;
 544
 545         inval_vport();
 546 }
 547
 548 static void act_rmobj(void)
 549 {
 550         if(selobj >= 0) {
 551                 scn_rm_object(scn, selobj);
 552                 selobj = -1;
 553                 inval_vport();
 554         }
 555 }
 556
 557
 558 void primray(cgm_ray *ray, int x, int y)
 559 {
 560         float nx, ny;
 561         cgm_vec3 npos, farpt;
 562         float inv_pv[16];
 563
 564         y = win_height - y;
 565         nx = (float)(x - viewport[0]) / (float)viewport[2];
 566         ny = (float)(y - viewport[1]) / (float)viewport[3];
 567
 568         cgm_mcopy(inv_pv, proj_matrix_inv);
 569         cgm_mmul(inv_pv, view_matrix_inv);
 570
 571         cgm_vcons(&npos, nx, ny, 0.0f);
 572         cgm_unproject(&ray->origin, &npos, inv_pv);
 573         npos.z = 1.0f;
 574         cgm_unproject(&farpt, &npos, inv_pv);
 575
 576         ray->dir.x = farpt.x - ray->origin.x;
 577         ray->dir.y = farpt.y - ray->origin.y;
 578         ray->dir.z = farpt.z - ray->origin.z;
 579 }
 580
 581 static void moveobj(struct object *obj, int px0, int py0, int px1, int py1)
 582 {
 583         cgm_ray ray;
 584         float dist;
 585         cgm_vec3 p0, p1;
 586
 587         primray(&ray, px0, py0);
 588         cgm_vnormalize(&ray.dir);
 589         dist = ray_object_dist(&ray, obj);
 590         cgm_raypos(&p0, &ray, dist);
 591         primray(&ray, px1, py1);
 592         cgm_vnormalize(&ray.dir);
 593         cgm_raypos(&p1, &ray, dist);
 594
 595         cgm_vsub(&p1, &p0);
 596         cgm_vadd(&obj->pos, &p1);
 597         obj->xform_valid = 0;
 598
 599         inval_vport();
 600 }
 601
 602 static void inval_vport(void)
 603 {
 604         vpdirty = 1;
 605         app_redisplay(0, 0, 0, 0);
 606 }