Fix snapping object to the group in Editor to skip trigger volumes

#522

Source/Editor/SceneGraph/Actors/ColliderNode.cs

@@ -31,7 +31,8 @@ namespace FlaxEditor.SceneGraph
         public override bool RayCastSelf(ref RayCastData ray, out Real distance, out Vector3 normal)
         {
             // Check if skip raycasts
-            if ((ray.Flags & RayCastData.FlagTypes.SkipColliders) == RayCastData.FlagTypes.SkipColliders)
+            if (((ray.Flags & RayCastData.FlagTypes.SkipColliders) == RayCastData.FlagTypes.SkipColliders) ||
+                (((ray.Flags & RayCastData.FlagTypes.SkipTriggers) == RayCastData.FlagTypes.SkipTriggers) && ((Collider)Actor).IsTrigger))
             {
                 distance = 0;
                 normal = Vector3.Up;

Source/Editor/SceneGraph/SceneGraphNode.cs

@@ -194,6 +194,11 @@ namespace FlaxEditor.SceneGraph
                 /// The skip editor primitives. Use it to ignore editor icons and primitives intersections detection.
                 /// </summary>
                 SkipEditorPrimitives = 2,
+
+                /// <summary>
+                /// The skip trigger colliders flag. Use it to ignore physics trigger colliders intersections detection.
+                /// </summary>
+                SkipTriggers = 4,
             }
 
             /// <summary>