added horizontalAlign/verticalAlign

h2d/ObjectFollower.hx

@@ -13,6 +13,9 @@ class ObjectFollower extends Object {
 	public var offsetY = 0.;
 	public var offsetZ = 0.;
 
+	public var horizontalAlign : h2d.Flow.FlowAlign = Left;
+	public var verticalAlign : h2d.Flow.FlowAlign = Top;
+
 	public function new( obj, ?parent ) {
 		super(parent);
 		this.follow = obj;
@@ -28,11 +31,35 @@ class ObjectFollower extends Object {
 		var width = s2d == null ? h3d.Engine.getCurrent().width : s2d.width;
 		var height = s2d == null ? h3d.Engine.getCurrent().height : s2d.height;
 		var absPos = follow.getAbsPos();
-		var p = scene.camera.project(absPos._41 + offsetX, absPos._42 + offsetY, absPos._43 + offsetZ, width, height, pixelSnap);
+		var p = scene.camera.project(absPos._41 + offsetX, absPos._42 + offsetY, absPos._43 + offsetZ, width, height);
 		x = p.x;
 		y = p.y;
 		visible = p.z > 0;
 
+		if( horizontalAlign != Left || verticalAlign != Top ) {
+			var prev = follow;
+			follow = null;
+			var b = getBounds(this); // prevent recursive
+			follow = prev;
+
+			var w = b.width, h = b.height;
+			switch( horizontalAlign ) {
+			case Middle: x -= w * 0.5;
+			case Right: x -= w;
+			default:
+			}
+			switch( verticalAlign ) {
+			case Middle: y -= h * 0.5;
+			case Bottom: y -= h;
+			default:
+			}
+		}
+
+		if( pixelSnap ) {
+			x = Math.round(x);
+			y = Math.round(y);
+		}
+
 		if(followVisibility) {
 			var parent = follow;
 			while(parent != null) {