Add random tree generation

main.c

@@ -150,13 +150,20 @@ void setup_camera_scene()
     // struct object white_sphere = new_box(new_vec3(-0.75, 0, 8), 0, 1);
     // struct object other_white_sphere = new_sphere(new_vec3(0.75, 0, 8), 0, 1);
 
-    struct object* tree = new_tree(new_vec3(0, 0, 5), 0, 1);
-
-    struct object* scene_objects = malloc(2 * sizeof(struct object));
-    scene_objects[0] = tree[0];
-    scene_objects[1] = tree[1];
+    const double lower_pos_bound = -5;
+    const double upper_pos_bound = -5;
+    const int num_trees = 4;
+    struct object* scene_objects = malloc(2 * num_trees * sizeof(struct object));
+    for (int i = 0; i < 2 * num_trees; i+=2) {
+        struct vec* random_pos = new_random_vec(3, lower_pos_bound, upper_pos_bound);
+        random_pos->elements[1] = 0;
+
+        struct object* tree = new_tree(random_pos, 0, 1);
+        scene_objects[i] = tree[0];
+        scene_objects[i + 1] = tree[1];
+    }
     
-    scene_object = new_scene(2, scene_objects);
+    scene_object = new_scene(2 * num_trees, scene_objects);
     scene_object->sol.pos.dimension = 3;
     scene_object->sol.pos.elements = camera->pos->elements;
 }

vect.c

@@ -19,6 +19,18 @@ new_vec(int num_dimensions)
     return new_vector;
 }
 
+struct vec*
+new_random_vec(int num_dimensions, double min, double max) 
+{
+    struct vec* new_vector = new_vec(num_dimensions);
+    for (int i = 0; i < num_dimensions; i++) {
+        double rand_val = (double) rand() / RAND_MAX;
+        new_vector->elements[i] = min + rand_val * (max - min);
+    }
+
+    return new_vector;
+}
+
 struct vec* do_on_vec_ip(struct vec * v, double (*func)(double)) {
 
     for (int i = 0; i < v->dimension; i++) {
@@ -545,4 +557,3 @@ perpendicular_vec(int num_vectors, struct vec** vectors)
     return perpendicular;
 }
 
-

vect.h

@@ -26,6 +26,7 @@ struct mat2 {
 };
 
 struct vec* new_vec(int num_dimensions);
+struct vec* new_random_vec(int num_dimensions, double min, double max);
 struct vec* new_vec_of(int num_dimensions, double value);
 
 void free_vec(struct vec*);