first render

[retroray] / src / scene.c

diff --git a/src/scene.c b/src/scene.c
index 48279cc..36c9fba 100644 (file)
--- a/src/scene.c
+++ b/src/scene.c
@@ -22,6 +22,8 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #include "darray.h"
 #include "logger.h"
 
+static struct material *default_material(void);
+
 struct scene *create_scene(void)
 {
        struct scene *scn;
@@ -31,7 +33,8 @@ struct scene *create_scene(void)
                return 0;
        }
        scn->objects = darr_alloc(0, sizeof *scn->objects);
-
+       scn->lights = darr_alloc(0, sizeof *scn->lights);
+       scn->mtl = darr_alloc(0, sizeof *scn->mtl);
        return scn;
 }
 
@@ -45,6 +48,18 @@ void free_scene(struct scene *scn)
                free_object(scn->objects[i]);
        }
        darr_free(scn->objects);
+
+       for(i=0; i<darr_size(scn->lights); i++) {
+               free_light(scn->lights[i]);
+       }
+       darr_free(scn->lights);
+
+       for(i=0; i<darr_size(scn->mtl); i++) {
+               mtl_destroy(scn->mtl[i]);
+               free(scn->mtl[i]);
+       }
+       darr_free(scn->mtl);
+
        free(scn);
 }
 
@@ -87,6 +102,119 @@ int scn_object_index(const struct scene *scn, const struct object *obj)
        return -1;
 }
 
+
+
+int scn_add_material(struct scene *scn, struct material *mtl)
+{
+       darr_push(scn->mtl, &mtl);
+       return 0;
+}
+
+int scn_rm_material(struct scene *scn, struct material *mtl)
+{
+       int idx, num_mtl;
+
+       if((idx = scn_material_index(scn, mtl)) == -1) {
+               return -1;
+       }
+
+       num_mtl = darr_size(scn->mtl);
+
+       if(idx < num_mtl - 1) {
+               scn->mtl[idx] = scn->mtl[num_mtl - 1];
+       }
+       darr_pop(scn->mtl);
+       return 0;
+}
+
+int scn_num_materials(const struct scene *scn)
+{
+       return darr_size(scn->mtl);
+}
+
+int scn_material_index(const struct scene *scn, const struct material *mtl)
+{
+       int i, num_mtl;
+
+       num_mtl = darr_size(scn->mtl);
+       for(i=0; i<num_mtl; i++) {
+               if(scn->mtl[i] == mtl) {
+                       return i;
+               }
+       }
+       return -1;
+}
+
+struct material *scn_find_material(const struct scene *scn, const char *mname)
+{
+       int i, num_mtl;
+
+       num_mtl = darr_size(scn->mtl);
+       for(i=0; i<num_mtl; i++) {
+               if(strcmp(scn->mtl[i]->name, mname) == 0) {
+                       return scn->mtl[i];
+               }
+       }
+       return 0;
+}
+
+/* manage lights */
+
+int scn_add_light(struct scene *scn, struct light *light)
+{
+       darr_push(scn->lights, &light);
+       return 0;
+}
+
+int scn_rm_light(struct scene *scn, struct light *light)
+{
+       int idx, num_lights;
+
+       if((idx = scn_light_index(scn, light)) == -1) {
+               return -1;
+       }
+
+       num_lights = darr_size(scn->lights);
+
+       if(idx < num_lights - 1) {
+               scn->lights[idx] = scn->lights[num_lights - 1];
+       }
+       darr_pop(scn->lights);
+       return 0;
+}
+
+int scn_num_lights(const struct scene *scn)
+{
+       return darr_size(scn->lights);
+}
+
+int scn_light_index(const struct scene *scn, const struct light *light)
+{
+       int i, num_lights;
+
+       num_lights = darr_size(scn->lights);
+       for(i=0; i<num_lights; i++) {
+               if(scn->lights[i] == light) {
+                       return i;
+               }
+       }
+       return -1;
+}
+
+struct light *scn_find_light(const struct scene *scn, const char *mname)
+{
+       int i, num_lights;
+
+       num_lights = darr_size(scn->lights);
+       for(i=0; i<num_lights; i++) {
+               if(strcmp(scn->lights[i]->name, mname) == 0) {
+                       return scn->lights[i];
+               }
+       }
+       return 0;
+}
+
+
 int scn_intersect(const struct scene *scn, const cgm_ray *ray, struct rayhit *hit)
 {
        int i, numobj;
@@ -109,6 +237,9 @@ int scn_intersect(const struct scene *scn, const cgm_ray *ray, struct rayhit *hi
        return 0;
 }
 
+
+/* --- object functions --- */
+
 struct object *create_object(int type)
 {
        struct object *obj;
@@ -143,6 +274,7 @@ struct object *create_object(int type)
        cgm_midentity(obj->xform);
        cgm_midentity(obj->inv_xform);
        obj->xform_valid = 1;
+       obj->mtl = default_material();
 
        set_object_name(obj, buf);
        objid++;
@@ -198,3 +330,65 @@ void calc_object_matrix(struct object *obj)
 
        obj->xform_valid = 1;
 }
+
+/* --- lights --- */
+struct light *create_light(void)
+{
+       struct light *lt;
+       static int ltidx;
+       char buf[64];
+
+       if(!(lt = malloc(sizeof *lt))) {
+               return 0;
+       }
+       cgm_vcons(&lt->pos, 0, 0, 0);
+
+       set_light_color(lt, 1, 1, 1);
+       set_light_energy(lt, 1);
+
+       sprintf(buf, "light%03d", ltidx++);
+       set_light_name(lt, buf);
+
+       return lt;
+}
+
+void free_light(struct light *lt)
+{
+       if(!lt) return;
+       free(lt->name);
+       free(lt);
+}
+
+int set_light_name(struct light *lt, const char *name)
+{
+       char *tmp = strdup(name);
+       if(!tmp) return -1;
+       free(lt->name);
+       lt->name = tmp;
+       return 0;
+}
+
+void set_light_color(struct light *lt, float r, float g, float b)
+{
+       cgm_vcons(&lt->orig_color, r, g, b);
+       lt->color = lt->orig_color;
+       cgm_vscale(&lt->color, lt->energy);
+}
+
+void set_light_energy(struct light *lt, float e)
+{
+       lt->energy = e;
+       lt->color = lt->orig_color;
+       cgm_vscale(&lt->color, e);
+}
+
+static struct material *default_material(void)
+{
+       static struct material defmtl;
+
+       if(!defmtl.name) {
+               mtl_init(&defmtl);
+               mtl_set_name(&defmtl, "default_mtl");
+       }
+       return &defmtl;
+}