Fixed some bugs with fx init and added a way to force init of prefabs…

… without root2d/3d

hrt/prefab/ContextShared.hx

@@ -36,6 +36,12 @@ class ContextShared {
 	// Parent prefab if the object if it was created as a reference
 	public var parent : Prefab = null;
 
+	/**
+		Disable some checks at the prefab instanciation time. Used to initialize prefabs that
+		don't need locals2d/3d like shaders
+	**/
+	public var forceInstanciate : Bool = false;
+
 	var bakedData : Map<String, haxe.io.Bytes>;
 
 	public function new( ?res : hxd.res.Resource, ?root2d: h2d.Object = null, ?root3d: h3d.scene.Object = null) {

hrt/prefab/Prefab.hx

@@ -123,7 +123,7 @@ class Prefab {
 
 	// Create the hierarchy of heaps objects from this prefab. Can only be done on cloned prefabs or if forceInstanciate is true ()
 	public function instanciate() {
-		if (shared.root2d == null || shared.root3d == null)
+		if (shared.root2d == null && shared.root3d == null && !shared.forceInstanciate)
 			throw "Can't instanciate a template prefab.";
 
 		var old2d = shared.current2d;
@@ -557,7 +557,7 @@ class Prefab {
 	*/
 
 	function shouldBeInstanciated() : Bool {
-		if (shared.root2d == null || shared.root3d == null)
+		if (shared.root2d == null && shared.root3d == null && !shared.forceInstanciate)
 			throw "Prefab is missing a shared context for instanciation";
 
 		if (!enabled) return false;

hrt/prefab/fx/FX.hx

@@ -282,7 +282,7 @@ class FXAnimation extends h3d.scene.Object {
 	}
 
 	function initObjAnimations(elt: PrefabElement) {
-		if(!elt.enabled) return;
+		if(@:privateAccess !elt.shouldBeInstanciated()) return;
 		if(Std.downcast(elt, hrt.prefab.fx.Emitter) == null) {
 			// Don't extract animations for children of Emitters
 			for(c in elt.children) {
@@ -335,8 +335,7 @@ class FXAnimation extends h3d.scene.Object {
 
 		var ap : AdditionalProperies = null;
 		var local3d = Object3D.getLocal3d(elt);
-		if (local3d == null)
-			trace("break");
+
 		if( Std.isOfType(local3d, h3d.scene.pbr.PointLight)) {
 			ap = PointLight(makeColor("color"), makeVal("power", null), makeVal("size", null), makeVal("range", null) );
 		}