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];
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);
82 static void draw_object(struct object *obj);
83 static void draw_grid(void);
84 static void tbn_callback(rtk_widget *w, void *cls);
86 static void act_settool(int tidx);
87 static void act_addobj(void);
88 static void act_rmobj(void);
90 static void draw_rband(void);
91 static void moveobj(struct object *obj, int px0, int py0, int px1, int py1);
94 struct app_screen scr_model = {
96 mdl_init, mdl_destroy,
98 mdl_display, mdl_reshape,
99 mdl_keyb, mdl_mouse, mdl_motion
102 static rtk_widget *toolbar;
103 static rtk_iconsheet *icons;
105 static struct cmesh *mesh_sph;
107 static float cam_theta, cam_phi = 20, cam_dist = 8;
108 static float view_matrix[16], proj_matrix[16];
109 static float view_matrix_inv[16], proj_matrix_inv[16];
110 static int viewport[4];
111 static cgm_ray pickray;
113 static int cur_tool, prev_tool = -1;
114 static int selobj = -1;
116 static rtk_rect rband;
117 static int rband_valid;
119 static int rendering;
122 static int mdl_init(void)
127 if(!(icons = rtk_load_iconsheet("data/icons.png"))) {
128 errormsg("failed to load iconsheet\n");
131 for(i=0; i<NUM_TOOL_BUTTONS; i++) {
132 if(tbn_icon_name[i]) {
133 tbn_icons[i] = rtk_define_icon(icons, tbn_icon_name[i],
134 tbn_icon_pos[i][0], tbn_icon_pos[i][1], 16, 16);
140 if(!(toolbar = rtk_create_window(0, "toolbar", 0, 0, win_width, TOOLBAR_HEIGHT))) {
143 rtk_win_layout(toolbar, RTK_HBOX);
146 for(i=0; i<NUM_TOOL_BUTTONS; i++) {
148 rtk_create_separator(toolbar);
150 if(!(w = rtk_create_iconbutton(toolbar, tbn_icons[i], 0))) {
154 rtk_set_callback(w, tbn_callback, (void*)(intptr_t)i);
156 rtk_bn_mode(w, RTK_TOGGLEBN);
157 tools[toolidx++] = w;
164 assert(toolidx == NUM_TOOLS);
166 if(!(mesh_sph = cmesh_alloc())) {
167 errormsg("failed to allocate sphere vis mesh\n");
170 gen_sphere(mesh_sph, 1.0f, 16, 8, 1.0f, 1.0f);
174 static void mdl_destroy(void)
176 cmesh_free(mesh_sph);
177 rtk_free_iconsheet(icons);
180 static int mdl_start(void)
182 gaw_clear_color(0.125, 0.125, 0.125, 1);
184 gaw_enable(GAW_DEPTH_TEST);
185 gaw_enable(GAW_CULL_FACE);
186 gaw_enable(GAW_LIGHTING);
187 gaw_enable(GAW_LIGHT0);
191 static void mdl_stop(void)
195 static void mdl_display(void)
200 gaw_clear(GAW_COLORBUF | GAW_DEPTHBUF);
202 rtk_draw_widget(toolbar);
204 gaw_matrix_mode(GAW_MODELVIEW);
206 gaw_translate(0, 0, -cam_dist);
207 gaw_rotate(cam_phi, 1, 0, 0);
208 gaw_rotate(cam_theta, 0, 1, 0);
209 gaw_get_modelview(view_matrix);
210 cgm_mcopy(view_matrix_inv, view_matrix);
211 cgm_minverse(view_matrix_inv);
215 gaw_mtl_diffuse(0.5, 0.5, 0.5, 1);
217 num = scn_num_objects(scn);
218 for(i=0; i<num; i++) {
221 gaw_enable(GAW_POLYGON_OFFSET);
222 draw_object(scn->objects[i]);
223 gaw_disable(GAW_POLYGON_OFFSET);
226 gaw_disable(GAW_LIGHTING);
228 gaw_color3f(0, 1, 0);
229 draw_object(scn->objects[i]);
233 draw_object(scn->objects[i]);
238 if(render(framebuf)) {
246 dtx_position(550, 475);
247 dtx_color(0.3, 0.3, 0.1, 1);
248 dtx_printf("update: %ld", frameno++);
255 static void draw_object(struct object *obj)
259 if(!obj->xform_valid) {
260 calc_object_matrix(obj);
263 gaw_mult_matrix(obj->xform);
267 sph = (struct sphere*)obj;
268 gaw_scale(sph->rad, sph->rad, sph->rad);
269 cmesh_draw(mesh_sph);
279 static void draw_grid(void)
282 gaw_disable(GAW_LIGHTING);
284 gaw_begin(GAW_LINES);
285 gaw_color3f(0.5, 0, 0);
286 gaw_vertex3f(0, 0, 0);
287 gaw_vertex3f(-100, 0, 0);
288 gaw_vertex3f(0, 0, 0);
289 gaw_vertex3f(100, 0, 0);
290 gaw_color3f(0, 0.5, 0);
291 gaw_vertex3f(0, 0, 0);
292 gaw_vertex3f(0, 0, -100);
293 gaw_vertex3f(0, 0, 0);
294 gaw_vertex3f(0, 0, 100);
300 static void mdl_reshape(int x, int y)
302 float aspect = (float)x / (float)(y - TOOLBAR_HEIGHT);
305 viewport[1] = TOOLBAR_HEIGHT;
307 viewport[3] = y - TOOLBAR_HEIGHT;
308 gaw_viewport(viewport[0], viewport[1], viewport[2], viewport[3]);
310 gaw_matrix_mode(GAW_PROJECTION);
312 gaw_perspective(50, aspect, 0.5, 100.0);
313 gaw_get_projection(proj_matrix);
314 cgm_mcopy(proj_matrix_inv, proj_matrix);
315 cgm_minverse(proj_matrix_inv);
317 rtk_resize(toolbar, win_width, TOOLBAR_HEIGHT);
320 static void mdl_keyb(int key, int press)
322 if(rtk_input_key(toolbar, key, press)) {
330 act_settool(TOOL_SEL);
333 act_settool(TOOL_MOVE);
336 act_settool(TOOL_ROT);
339 act_settool(TOOL_SCALE);
354 static void mdl_mouse(int bn, int press, int x, int y)
357 if(!vpdrag && rtk_input_mbutton(toolbar, bn, press, x, y)) {
368 vpdrag &= ~(1 << bn);
373 if(cur_tool == TOOL_REND_AREA) {
375 act_settool(prev_tool);
378 rend_size(win_width, win_height);
379 rend_begin(rband.x, rband.y, rband.width, rband.height);
382 } else if(bn == 0 && x == rband.x && y == rband.y) {
383 primray(&pickray, x, y);
384 if(scn_intersect(scn, &pickray, &hit)) {
385 selobj = scn_object_index(scn, hit.obj);
394 static void mdl_motion(int x, int y)
398 if(!vpdrag && rtk_input_mmotion(toolbar, x, y)) {
409 cam_theta += dx * 0.5f;
410 cam_phi += dy * 0.5f;
411 if(cam_phi < -90) cam_phi = -90;
412 if(cam_phi > 90) cam_phi = 90;
417 cam_dist += dy * 0.1f;
418 if(cam_dist < 0) cam_dist = 0;
426 if(rband.x != x || rband.y != y) {
427 rband.width = x - rband.x;
428 rband.height = y - rband.y;
435 struct object *obj = scn->objects[selobj];
436 moveobj(obj, mouse_x, mouse_y, x, y);
448 static void add_sphere(void)
452 if(!(obj = create_object(OBJ_SPHERE))) {
455 scn_add_object(scn, obj);
458 static void tbn_callback(rtk_widget *w, void *cls)
460 int id = (intptr_t)cls;
467 act_settool(id - TBN_SEL);
472 act_settool(id - TBN_UNION + TOOL_UNION);
475 act_settool(TOOL_REND_AREA);
491 static void act_settool(int tidx)
494 prev_tool = cur_tool;
496 for(i=0; i<NUM_TOOLS; i++) {
498 rtk_set_value(tools[i], 1);
500 rtk_set_value(tools[i], 0);
506 static void act_addobj(void)
508 int idx = scn_num_objects(scn);
515 static void act_rmobj(void)
518 scn_rm_object(scn, selobj);
524 static void draw_rband(void)
527 uint32_t *fbptr, *bptr;
532 if(rband.width < 0) {
538 if(rband.height < 0) {
545 fbptr = framebuf + y * win_width + x;
546 bptr = fbptr + win_width * (h - 1);
549 fbptr[i] ^= 0xffffff;
553 for(i=0; i<h-2; i++) {
554 fbptr[0] ^= 0xffffff;
555 fbptr[w - 1] ^= 0xffffff;
560 void primray(cgm_ray *ray, int x, int y)
563 cgm_vec3 npos, farpt;
567 nx = (float)(x - viewport[0]) / (float)viewport[2];
568 ny = (float)(y - viewport[1]) / (float)viewport[3];
570 cgm_mcopy(inv_pv, proj_matrix_inv);
571 cgm_mmul(inv_pv, view_matrix_inv);
573 cgm_vcons(&npos, nx, ny, 0.0f);
574 cgm_unproject(&ray->origin, &npos, inv_pv);
576 cgm_unproject(&farpt, &npos, inv_pv);
578 ray->dir.x = farpt.x - ray->origin.x;
579 ray->dir.y = farpt.y - ray->origin.y;
580 ray->dir.z = farpt.z - ray->origin.z;
583 static void moveobj(struct object *obj, int px0, int py0, int px1, int py1)
589 primray(&ray, px0, py0);
590 cgm_vnormalize(&ray.dir);
591 dist = ray_object_dist(&ray, obj);
592 cgm_raypos(&p0, &ray, dist);
593 primray(&ray, px1, py1);
594 cgm_vnormalize(&ray.dir);
595 cgm_raypos(&p1, &ray, dist);
598 cgm_vadd(&obj->pos, &p1);
599 obj->xform_valid = 0;