Facing

facing can be used to help set/determine the orientation of a FlxSprite. Combine this with FlxSprite.setFacingFlip() to have your sprite graphic flip depending on the way it’s facing.

// set sprite's facing to be FlxObject.RIGHT.
sprite.facing = FlxObject.RIGHT;

// whenever sprite is facing RIGHT, do NOT flip the sprite's graphic
sprite.setFacingFlip(FlxObject.RIGHT, false, false);

// whenever sprite is facing LEFT, flip the graphic horizontally
sprite.setFacingFlip(FlxObject.LEFT, true, false);

Demonstration

Source

package;

import flixel.FlxG;
import flixel.FlxObject;
import flixel.FlxSprite;
import flixel.FlxState;

class PlayState extends FlxState
{
    var sprite:FlxSprite;
    var flipTimer:Float = 1;

    override public function create()
    {
        super.create();

        sprite = new FlxSprite("assets/arrow.png");
        sprite.screenCenter();
        sprite.facing = FlxObject.RIGHT;
        sprite.setFacingFlip(FlxObject.RIGHT, false, false);
        sprite.setFacingFlip(FlxObject.LEFT, true, false);
        add(sprite);
    }

    override public function update(elapsed:Float)
    {
        flipTimer -= elapsed;
        if (flipTimer <= 0)
        {
            if (sprite.facing == FlxObject.RIGHT)
                sprite.facing = FlxObject.LEFT;
            else
                sprite.facing = FlxObject.RIGHT;

            flipTimer++;
        }
        super.update(elapsed);
    }
}
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