IK demo: Fixed bug in FABRIK IK that would cause the right arm to freak out by changing the middle joint code.

3d/ik/addons/sade/ik_fabrik.gd

@@ -190,8 +190,9 @@ func solve_chain():
 	# If we are using middle joint target (and have more than 2 bones), move our middle joint towards it!
 	if use_middle_joint_target == true:
 		if bone_nodes.size() > 2:
-			var middle_point_pos = middle_joint_target.global_transform
-			bone_nodes[bone_nodes.size()/2].global_transform.origin = middle_point_pos.origin
+			var middle_point_pos = middle_joint_target.global_transform.origin
+			var middle_point_pos_diff = (middle_point_pos - bone_nodes[bone_nodes.size()/2].global_transform.origin)
+			bone_nodes[bone_nodes.size()/2].global_transform.origin += middle_point_pos_diff.normalized()
 	
 	# Get the difference between our end effector (the final bone in the chain) and the target
 	var dif = (bone_nodes[bone_nodes.size()-1].global_transform.origin - target_pos).length()

3d/ik/fabrik_ik.tscn

@@ -95,7 +95,6 @@ __meta__ = {
 skeleton_path = NodePath("../../../BattleBot/Armature/Skeleton")
 bones_in_chain = PoolStringArray( "Left_UpperArm", "Left_LowerArm" )
 bones_in_chain_lengths = PoolRealArray( 1.97, 3 )
-chain_iterations = 10
 limit_chain_iterations = false
 use_middle_joint_target = true
 

3d/ik/look_at_ik.tscn

@@ -133,6 +133,9 @@ margin_right = -5.0
 margin_bottom = -10.0
 text = "Next scene"
 script = ExtResource( 8 )
+__meta__ = {
+"_edit_use_anchors_": false
+}
 scene_to_change_to = "res://fabrik_ik.tscn"
 
 [editable path="BattleBot"]