# driving rotation problem

 06 June 2013 Mambo4 not a jedi yet   portfolio Logan Bender Game Technical Artist Greater Seattle, USA driving rotation problem A and B are bones in 2 separate hierarchies. B rotation values are nonzero(and must remain thus). I need control the rotation of obj A from obj B in the following way: A rotation follows B rotation A is also still inherits everything from its on hierarchy. orient constraining A to B fails, because A loses its hierarchy orientation, becoming completely slaved to B I tried param wiring B to A, which got me close, But B is not at a zero value to start, so A is forced into the initial orientation of B. I need A to stay put when the connection is made. would a scripted rotation controller solve this problem? share quote
 06 June 2013 denisT MAX Doctor   portfolio Denis Trofimov CA, USA you can use rotation list controllers for both A and B nodes. list controllers has to have two subcontrollers: Initial and Zero. if you wire (or use the same instance) Zero controllers you will get what you want here is a sample `````` delete objects b0 = box name:"parent" width:1 length:1 height:5 wirecolor:red b1 = box name:"source" width:1 length:1 height:3 parent:b0 wirecolor:orange position:[0,0,5] b1[#transform][#rotation].value = eulerangles 0 40 0 b2 = box name:"target" width:1 length:1 height:3 wirecolor:green pos:[10,0,0] c1 = b1.rotation.controller = Rotation_List() c1.available.controller = Bezier_Rotation() c2 = b2.rotation.controller = Rotation_List() c2.available.controller = Bezier_Rotation() c2.setactive 2 paramWire.connect c2[2] c1[2] "Smooth_Rotation"`````` Last edited by denisT : 06 June 2013 at 05:44 PM. share quote
 06 June 2013 Mambo4 not a jedi yet   portfolio Logan Bender Game Technical Artist Greater Seattle, USA Thnak Dennis. your scritp works as advertised In my case, I was stuck with an object B that had a rotation.controller[2]=Euler_xyz. that I can't change (too many downstream things dependent) I was able to use my first attempt -param wiring the X_rotation, y_rotation, and z_rotation, and adjusting for the offset of A in the "Froze Rotation" controller. Last edited by Mambo4 : 06 June 2013 at 10:01 PM. share quote
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