void game_step()

in procgen/src/games/miner.cpp [247:314]
53 lines of code
27 McCabe index (conditional complexity)

    void game_step() override {
        BasicAbstractGame::game_step();

        if (action_vx > 0)
            agent->is_reflected = false;
        if (action_vx < 0)
            agent->is_reflected = true;

        handle_push();

        int agent_obj = get_obj(int(agent->x), int(agent->y));

        if (agent_obj == DIAMOND) {
            step_data.reward += DIAMOND_REWARD;
        }

        if (agent_obj == DIRT || agent_obj == DIAMOND) {
            set_obj(int(agent->x), int(agent->y), SPACE);
        }

        int main_area = main_width * main_height;

        int diamonds_count = 0;

        for (int idx = 0; idx < main_area; idx++) {
            int obj = get_obj(idx);

            int obj_x = idx % main_width;
            int agent_idx = (agent->y - .5) * main_width + (agent->x - .5);

            int stat_type = get_stationary_type(obj);

            if (stat_type == DIAMOND) {
                diamonds_count++;
            }

            if (obj == BOULDER || obj == MOVING_BOULDER || obj == DIAMOND || obj == MOVING_DIAMOND) {
                int below_idx = idx - main_width;
                int obj2 = get_obj(below_idx);
                bool agent_is_below = agent_idx == below_idx;

                if (obj2 == SPACE && !agent_is_below) {
                    set_obj(idx, SPACE);
                    set_obj(below_idx, get_moving_type(obj));
                } else if (agent_is_below && is_moving(obj)) {
                    step_data.done = true;
                } else if (is_round(obj2) && obj_x > 0 && is_free(idx - 1) && is_free(idx - main_width - 1)) {
                    set_obj(idx, SPACE);
                    set_obj(idx - 1, get_stationary_type(obj));
                } else if (is_round(obj2) && obj_x < main_width - 1 && is_free(idx + 1) && is_free(idx - main_width + 1)) {
                    set_obj(idx, SPACE);
                    set_obj(idx + 1, stat_type);
                } else {
                    set_obj(idx, stat_type);
                }
            }
        }

        diamonds_remaining = diamonds_count;

        for (auto ent : entities) {
            if (ent->type == ENEMY) {
                if (rand_gen.randn(6) == 0) {
                    choose_new_vel(ent);
                }
            }
        }
    }