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/>.
23 struct scene *create_scene(void)
27 if(!(scn = malloc(sizeof *scn))) {
28 errormsg("failed to allocate scene\n");
31 scn->objects = darr_alloc(0, sizeof *scn->objects);
36 void free_scene(struct scene *scn)
42 for(i=0; i<darr_size(scn->objects); i++) {
43 free_object(scn->objects[i]);
45 darr_free(scn->objects);
49 int scn_add_object(struct scene *scn, struct object *obj)
51 darr_push(scn->objects, &obj);
55 int scn_num_objects(struct scene *scn)
57 return darr_size(scn->objects);
60 struct object *create_object(int type)
67 if(!(obj = malloc(sizeof *obj))) {
68 errormsg("failed to allocate object\n");
73 cgm_vcons(&obj->pos, 0, 0, 0);
74 cgm_qcons(&obj->rot, 0, 0, 0, 1);
75 cgm_vcons(&obj->scale, 1, 1, 1);
76 cgm_vcons(&obj->pivot, 0, 0, 0);
77 cgm_midentity(obj->xform);
81 sph = (struct sphere*)obj;
83 sprintf(buf, "sphere%03d", objid);
87 sprintf(buf, "object%03d", objid);
91 set_object_name(obj, buf);
96 void free_object(struct object *obj)
104 int set_object_name(struct object *obj, const char *name)
106 char *str = strdup(name);
114 void calc_object_matrix(struct object *obj)
118 float *mat = obj->xform;
120 cgm_mtranslation(mat, obj->pivot.x, obj->pivot.y, obj->pivot.z);
121 cgm_mrotation_quat(rmat, &obj->rot);
125 mat[4 + i] = rmat[4 + i];
126 mat[8 + i] = rmat[8 + i];
129 mat[0] *= obj->scale.x; mat[4] *= obj->scale.y; mat[8] *= obj->scale.z; mat[12] += obj->pos.x;
130 mat[1] *= obj->scale.x; mat[5] *= obj->scale.y; mat[9] *= obj->scale.z; mat[13] += obj->pos.y;
131 mat[2] *= obj->scale.x; mat[6] *= obj->scale.y; mat[10] *= obj->scale.z; mat[14] += obj->pos.z;
133 cgm_mpretranslate(mat, -obj->pivot.x, -obj->pivot.y, -obj->pivot.z);
135 /* that's basically: pivot * rotation * translation * scaling * -pivot */