[animgraph] Added animgraph.Resource, fixed compilation

hrt/animgraph/AnimGraphInstance.hx

@@ -56,7 +56,7 @@ class AnimGraphInstance extends h3d.anim.Animation {
 	}
 
 	public function getParam(name: String) : Null<Float> {
-		return parameterMap.get(name);
+		return parameterMap.get(name)?.runtimeValue;
 	}
 
 	public function resetParam(name: String) {

hrt/animgraph/Resource.hx

@@ -0,0 +1,48 @@
+package hrt.animgraph;
+
+@:access(hrt.prefab.AnimGraph)
+class Resource extends hxd.res.Resource {
+
+	var animGraph : AnimGraph;
+	var cacheVersion : Int;
+	var isWatched : Bool;
+
+	function loadData() {
+		var isBSON = entry.fetchBytes(0,1).get(0) == 'H'.code;
+		return isBSON ? new hxd.fmt.hbson.Reader(entry.getBytes(),false).read() : haxe.Json.parse(entry.getText());
+	}
+
+	override function watch( onChanged: Null<Void -> Void> ) {
+		if( entry == null )
+			return;
+		if( onChanged == null ) {
+			super.watch(null);
+			isWatched = false;
+			return;
+		}
+		isWatched = true;
+		super.watch(function() {
+			if( animGraph != null ) {
+				var data = try loadData() catch( e : Dynamic ) return; // parsing error (conflict ?)
+				animGraph.reload(data);
+			}
+			onChanged();
+		});
+	}
+
+	public function load() : hrt.animgraph.AnimGraph {
+		if( animGraph != null && cacheVersion == CACHE_VERSION )
+			return animGraph;
+		var data = loadData();
+		animGraph = Std.downcast(@:privateAccess hrt.prefab.Prefab.createFromDynamic(data, new hrt.prefab.ContextShared(entry.path, false)), hrt.animgraph.AnimGraph);
+		cacheVersion = CACHE_VERSION;
+		watch(function() {}); // auto lib reload
+		return animGraph;
+	}
+
+	public function loadAnim() : AnimGraphInstance {
+		return load().getAnimation();
+	}
+
+	public static var CACHE_VERSION = 0;
+}