ddmyx/scripts/FlyingAI/FlyingAI.gml

function enemy_flying_ai()
{
	// 索敌
    var _target = noone;
    if instance_exists(oPlayer)
        if distance_to_object(oPlayer) < chase_range
            _target = oPlayer;

    // 行为逻辑
    if _target != noone
    {
        state = "CHASE";
        var _dir = point_direction(x, y, _target.x, _target.y);
        
        // 施加加速度
        x_spd += lengthdir_x(accel, _dir) * global.time_scale;
        y_spd += lengthdir_y(accel, _dir) * global.time_scale;
        
        // 面向处理
        facing = (x < _target.x) ? 1 : -1;
    } 
    else 
    {
        state = "IDLE";
        var _dist_to_spawn = point_distance(x, y, spawn_x, spawn_y);
        
        if (_dist_to_spawn > 5) {
            var _dir_home = point_direction(x, y, spawn_x, spawn_y);
            x_spd += lengthdir_x(accel * 0.5, _dir_home) * global.time_scale;
            y_spd += lengthdir_y(accel * 0.5, _dir_home) * global.time_scale;
        } else {
            // 接近出生点时，应用空气阻力让它停下
            x_spd = lerp(x_spd, 0, air_friction);
            y_spd = lerp(y_spd, 0, air_friction);
        }
    }

    // 3. 速度限制 (Clamp)
    var _current_spd = point_distance(0, 0, x_spd, y_spd);
    if (_current_spd > max_spd) {
        var _scale = max_spd / _current_spd;
        x_spd *= _scale;
        y_spd *= _scale;
    }
    
    // 4. 动画更新 (之前讨论的手动控制)
    set_sprite(sEnemyFlying_Fly);
}