#include #include typedef struct { float x, y; } Position; int main(int argc, char *argv[]) { ecs_world_t *ecs = ecs_init_w_args(argc, argv); // Register component as usual ECS_COMPONENT(ecs, Position); // Add reflection data to component ecs_struct(ecs, { .entity = ecs_id(Position), // Make sure to use existing id .members = { { .name = "x", .type = ecs_id(ecs_f32_t) }, // builtin float type { .name = "y", .type = ecs_id(ecs_f32_t) } } }); // Create entity with Position as usual ecs_entity_t ent = ecs_entity(ecs, { .name = "ent" }); ecs_set(ecs, ent, Position, {10, 20}); // Convert position component to JSON const Position *ptr = ecs_get(ecs, ent, Position); char *str = ecs_ptr_to_json(ecs, ecs_id(Position), ptr); printf("Position = %s\n", str); ecs_os_free(str); // Convert entity & all its components to json str = ecs_entity_to_json(ecs, ent, NULL); printf("ent = %s\n", str); ecs_os_free(str); // { // "path":"ent", // "ids":[["Position"]], // "values":[{ // "x":10, // "y":20 // }] // } ecs_fini(ecs); }