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