scrollFactor is useful for changing the rate at which a FlxObject moves in relation to the camera.
You can set the x and y scroll factors independently. A value of 1 means the object will move exactly as fast as the camera. A value of 0 means the object will not move at all as the camera scrolls.
// set the scroll factor of an object
object.scrollFactor.set(0.5, 0.75);
package;
import flixel.FlxCamera;
import flixel.FlxG;
import flixel.FlxSprite;
import flixel.FlxState;
import flixel.text.FlxText;
import flixel.tile.FlxTileblock;
import flixel.tile.FlxTilemap;
import flixel.tweens.FlxTween;
import flixel.util.FlxAxes;
import flixel.util.FlxColor;
class PlayState extends FlxState
{
override function create()
{
super.create();
var bg:FlxTileblock = new FlxTileblock(0, 0, FlxG.width * 2, FlxG.height);
bg.loadTiles("assets/tiles.png", 16, 16, 4);
bg.screenCenter();
bg.scrollFactor.set(.33, .33);
add(bg);
var darkener:FlxSprite = new FlxSprite();
darkener.makeGraphic(FlxG.width, FlxG.height, 0x33000000);
darkener.scrollFactor.set();
add(darkener);
for (i in 0...Std.int((FlxG.width * 2) / 50))
{
var s:FlxSprite = new FlxSprite(5 + (i * 50), FlxG.height - 80, "assets/bigbox.png");
s.scrollFactor.set(.66, .66);
add(s);
}
var darkener:FlxSprite = new FlxSprite();
darkener.makeGraphic(FlxG.width, FlxG.height, 0x33000000);
darkener.scrollFactor.set();
add(darkener);
var wall:FlxTileblock = new FlxTileblock(0, FlxG.height - 72, FlxG.width * 2, 40);
wall.loadTiles("assets/wall.png", 40, 40, 0);
add(wall);
var black:FlxSprite = new FlxSprite();
black.makeGraphic(FlxG.width, 32, 0xFF000000);
black.y = FlxG.height - 32;
black.scrollFactor.set();
add(black);
var floor:FlxTileblock = new FlxTileblock(0, FlxG.height - 32, FlxG.width * 2, 32);
floor.loadTiles("assets/tiles.png", 16, 16, 0);
add(floor);
var ball:FlxSprite = new FlxSprite(10, FlxG.height - 56, "assets/sprite.png");
add(ball);
var text:FlxText = new FlxText(10, 10, FlxG.width, "This Text could be a helpful HUD element.");
text.color = 0xffffffff;
text.size = 8;
text.setBorderStyle(FlxTextBorderStyle.SHADOW, 0xFF000000);
text.scrollFactor.set();
add(text);
FlxG.camera.setScrollBoundsRect(0, 0, FlxG.width * 2, FlxG.height, true);
FlxG.camera.follow(ball, FlxCameraFollowStyle.LOCKON);
FlxTween.linearMotion(ball, 10, ball.y, (FlxG.width * 2) - 34, ball.y, 5, true, {type: FlxTweenType.PINGPONG});
}
}