2 RetroRay - integrated standalone vintage modeller/renderer
3 Copyright (C) 2023 John Tsiombikas <nuclear@mutantstargoat.com>
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.
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.
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/>.
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,
38 static const char *tbn_icon_name[] = {
39 "new", "open", "save", 0,
40 "sel", "move", "rot", "scale", 0,
42 "union", "isect", "diff", 0,
43 "mtl", "rend", "rend-area", "viewrend", 0, "cfg"
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}
52 static int tbn_istool[] = {
59 static rtk_icon *tbn_icons[NUM_TOOL_BUTTONS];
60 static rtk_widget *tbn_buttons[NUM_TOOL_BUTTONS];
62 #define TOOLBAR_HEIGHT 26
65 TOOL_SEL, TOOL_MOVE, TOOL_ROT, TOOL_SCALE,
66 TOOL_UNION, TOOL_ISECT, TOOL_DIFF, TOOL_REND_AREA,
69 static rtk_widget *tools[NUM_TOOLS];
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);
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);
89 static void act_settool(int tidx);
90 static void act_addobj(void);
91 static void act_rmobj(void);
93 static void fix_rect(rtk_rect *rect);
94 static void draw_rband(void);
95 static void moveobj(struct object *obj, int px0, int py0, int px1, int py1);
97 static void inval_vport(void);
100 struct app_screen scr_model = {
102 mdl_init, mdl_destroy,
104 mdl_display, mdl_reshape,
105 mdl_keyb, mdl_mouse, mdl_motion
108 static rtk_widget *toolbar;
109 static rtk_iconsheet *icons;
111 static struct cmesh *mesh_sph;
113 static float cam_theta, cam_phi = 20, cam_dist = 8;
114 static float view_matrix[16], proj_matrix[16];
115 static float view_matrix_inv[16], proj_matrix_inv[16];
116 static int viewport[4];
117 static cgm_ray pickray;
119 static int cur_tool, prev_tool = -1;
120 static int selobj = -1;
122 static rtk_rect rband;
123 static int rband_valid;
125 static int rendering;
126 static rtk_rect rendrect;
129 static int mdl_init(void)
134 if(!(icons = rtk_load_iconsheet("data/icons.png"))) {
135 errormsg("failed to load iconsheet\n");
138 for(i=0; i<NUM_TOOL_BUTTONS; i++) {
139 if(tbn_icon_name[i]) {
140 tbn_icons[i] = rtk_define_icon(icons, tbn_icon_name[i],
141 tbn_icon_pos[i][0], tbn_icon_pos[i][1], 16, 16);
147 if(!(toolbar = rtk_create_window(0, "toolbar", 0, 0, win_width, TOOLBAR_HEIGHT))) {
150 rtk_win_layout(toolbar, RTK_HBOX);
153 for(i=0; i<NUM_TOOL_BUTTONS; i++) {
155 rtk_create_separator(toolbar);
157 if(!(w = rtk_create_iconbutton(toolbar, tbn_icons[i], 0))) {
161 rtk_set_callback(w, tbn_callback, (void*)(intptr_t)i);
163 rtk_bn_mode(w, RTK_TOGGLEBN);
164 tools[toolidx++] = w;
171 assert(toolidx == NUM_TOOLS);
173 if(!(mesh_sph = cmesh_alloc())) {
174 errormsg("failed to allocate sphere vis mesh\n");
177 gen_sphere(mesh_sph, 1.0f, 16, 8, 1.0f, 1.0f);
183 static void mdl_destroy(void)
185 cmesh_free(mesh_sph);
186 rtk_free_iconsheet(icons);
189 static int mdl_start(void)
191 gaw_clear_color(0.125, 0.125, 0.125, 1);
193 gaw_enable(GAW_DEPTH_TEST);
194 gaw_enable(GAW_CULL_FACE);
195 gaw_enable(GAW_LIGHTING);
196 gaw_enable(GAW_LIGHT0);
198 rend_pan(0, -TOOLBAR_HEIGHT);
202 static void mdl_stop(void)
206 static void mdl_display(void)
212 gaw_clear(GAW_COLORBUF | GAW_DEPTHBUF);
214 gaw_matrix_mode(GAW_MODELVIEW);
216 gaw_translate(0, 0, -cam_dist);
217 gaw_rotate(cam_phi, 1, 0, 0);
218 gaw_rotate(cam_theta, 0, 1, 0);
219 gaw_get_modelview(view_matrix);
220 cgm_mcopy(view_matrix_inv, view_matrix);
221 cgm_minverse(view_matrix_inv);
225 num = scn_num_objects(scn);
226 for(i=0; i<num; i++) {
227 setup_material(scn->objects[i]->mtl);
231 gaw_enable(GAW_POLYGON_OFFSET);
232 draw_object(scn->objects[i]);
233 gaw_disable(GAW_POLYGON_OFFSET);
236 gaw_disable(GAW_LIGHTING);
238 gaw_color3f(0, 1, 0);
239 draw_object(scn->objects[i]);
243 draw_object(scn->objects[i]);
248 /* dirty all GUI windows */
249 rtk_invalidate(toolbar);
254 if(!render(framebuf)) {
258 app_redisplay(rendrect.x, rendrect.y, rendrect.width, rendrect.height);
262 rtk_draw_widget(toolbar);
269 static void draw_object(struct object *obj)
273 if(!obj->xform_valid) {
274 calc_object_matrix(obj);
277 gaw_mult_matrix(obj->xform);
281 sph = (struct sphere*)obj;
282 gaw_scale(sph->rad, sph->rad, sph->rad);
283 cmesh_draw(mesh_sph);
293 static void setup_material(struct material *mtl)
295 gaw_mtl_diffuse(mtl->kd.x, mtl->kd.y, mtl->kd.z, 1.0f);
296 gaw_mtl_specular(mtl->ks.x, mtl->ks.y, mtl->ks.z, mtl->shin);
297 gaw_mtl_emission(mtl->ke.x, mtl->ke.y, mtl->ke.z);
300 static void draw_grid(void)
303 gaw_disable(GAW_LIGHTING);
305 gaw_begin(GAW_LINES);
306 gaw_color3f(0.5, 0, 0);
307 gaw_vertex3f(0, 0, 0);
308 gaw_vertex3f(-100, 0, 0);
309 gaw_vertex3f(0, 0, 0);
310 gaw_vertex3f(100, 0, 0);
311 gaw_color3f(0, 0.5, 0);
312 gaw_vertex3f(0, 0, 0);
313 gaw_vertex3f(0, 0, -100);
314 gaw_vertex3f(0, 0, 0);
315 gaw_vertex3f(0, 0, 100);
321 static void mdl_reshape(int x, int y)
323 float aspect = (float)x / (float)(y - TOOLBAR_HEIGHT);
326 viewport[1] = TOOLBAR_HEIGHT;
328 viewport[3] = y - TOOLBAR_HEIGHT;
329 gaw_viewport(viewport[0], viewport[1], viewport[2], viewport[3]);
331 gaw_matrix_mode(GAW_PROJECTION);
333 gaw_perspective(50, aspect, 0.5, 100.0);
334 gaw_get_projection(proj_matrix);
335 cgm_mcopy(proj_matrix_inv, proj_matrix);
336 cgm_minverse(proj_matrix_inv);
338 rtk_resize(toolbar, win_width, TOOLBAR_HEIGHT);
341 static void mdl_keyb(int key, int press)
343 if(rtk_input_key(toolbar, key, press)) {
350 act_settool(TOOL_SEL);
353 act_settool(TOOL_MOVE);
356 act_settool(TOOL_ROT);
359 act_settool(TOOL_SCALE);
363 act_settool(TOOL_REND_AREA);
378 static void mdl_mouse(int bn, int press, int x, int y)
381 if(!vpdrag && rtk_input_mbutton(toolbar, bn, press, x, y)) {
391 vpdrag &= ~(1 << bn);
396 if(cur_tool == TOOL_REND_AREA) {
398 act_settool(prev_tool);
401 rend_size(win_width, win_height);
404 rend_begin(rband.x, rband.y, rband.width, rband.height);
406 app_redisplay(rband.x, rband.y, rband.width, rband.height);
408 } else if(bn == 0 && x == rband.x && y == rband.y) {
409 primray(&pickray, x, y);
410 if(scn_intersect(scn, &pickray, &hit)) {
411 int newsel = scn_object_index(scn, hit.obj);
412 if(newsel != selobj) {
426 static void mdl_motion(int x, int y)
430 if(!vpdrag && rtk_input_mmotion(toolbar, x, y)) {
440 cam_theta += dx * 0.5f;
441 cam_phi += dy * 0.5f;
442 if(cam_phi < -90) cam_phi = -90;
443 if(cam_phi > 90) cam_phi = 90;
448 cam_dist += dy * 0.1f;
449 if(cam_dist < 0) cam_dist = 0;
457 if(rband.x != x || rband.y != y) {
458 rband.width = x - rband.x;
459 rband.height = y - rband.y;
466 struct object *obj = scn->objects[selobj];
467 moveobj(obj, mouse_x, mouse_y, x, y);
478 static void add_sphere(void)
482 if(!(obj = create_object(OBJ_SPHERE))) {
485 scn_add_object(scn, obj);
488 static void tbn_callback(rtk_widget *w, void *cls)
490 int id = (intptr_t)cls;
497 act_settool(id - TBN_SEL);
502 act_settool(id - TBN_UNION + TOOL_UNION);
505 act_settool(TOOL_REND_AREA);
521 static void act_settool(int tidx)
526 prev_tool = cur_tool;
528 for(i=0; i<NUM_TOOLS; i++) {
530 if(!rtk_get_value(tools[i])) {
531 rtk_set_value(tools[i], 1);
532 rtk_get_rect(tools[i], &r);
535 if(rtk_get_value(tools[i])) {
536 rtk_set_value(tools[i], 0);
537 rtk_get_rect(tools[i], &r);
543 static void act_addobj(void)
545 int idx = scn_num_objects(scn);
552 static void act_rmobj(void)
555 scn_rm_object(scn, selobj);
561 static void fix_rect(rtk_rect *rect)
568 if(rband.width < 0) {
574 if(rband.height < 0) {
587 static void draw_rband(void)
591 uint32_t *fbptr, *bptr;
596 fbptr = framebuf + rect.y * win_width + rect.x;
597 bptr = fbptr + win_width * (rect.height - 1);
599 for(i=0; i<rect.width; i++) {
600 fbptr[i] ^= 0xffffff;
604 for(i=0; i<rect.height-2; i++) {
605 fbptr[0] ^= 0xffffff;
606 fbptr[rect.width - 1] ^= 0xffffff;
609 app_redisplay(rect.x, rect.y, rect.width, rect.height);
612 void primray(cgm_ray *ray, int x, int y)
615 cgm_vec3 npos, farpt;
619 nx = (float)(x - viewport[0]) / (float)viewport[2];
620 ny = (float)(y - viewport[1]) / (float)viewport[3];
622 cgm_mcopy(inv_pv, proj_matrix_inv);
623 cgm_mmul(inv_pv, view_matrix_inv);
625 cgm_vcons(&npos, nx, ny, 0.0f);
626 cgm_unproject(&ray->origin, &npos, inv_pv);
628 cgm_unproject(&farpt, &npos, inv_pv);
630 ray->dir.x = farpt.x - ray->origin.x;
631 ray->dir.y = farpt.y - ray->origin.y;
632 ray->dir.z = farpt.z - ray->origin.z;
635 static void moveobj(struct object *obj, int px0, int py0, int px1, int py1)
641 primray(&ray, px0, py0);
642 cgm_vnormalize(&ray.dir);
643 dist = ray_object_dist(&ray, obj);
644 cgm_raypos(&p0, &ray, dist);
645 primray(&ray, px1, py1);
646 cgm_vnormalize(&ray.dir);
647 cgm_raypos(&p1, &ray, dist);
650 cgm_vadd(&obj->pos, &p1);
651 obj->xform_valid = 0;
656 static void inval_vport(void)
659 app_redisplay(0, 0, 0, 0);