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Xpresso (again)
Hi everyone,
I’m trying something fancy and not sure if it’s possible in Xpresso. I have a Null object controlling a robot arm, but the arm is attached to a door. Ideally, I’d like my Null object alongside my other controllers, grouped together, but when the door swings open, the arm’s end stays with the Null (naturally) – if I move the Null inside the arm, when the door swings open, the arm moves as you would expect (but is now buried deep inside the door group)
Is it possible using Xpresso, to have an ‘IF’ statement along the lines of:
IF User Data ‘door open’ > 1%
THEN Null X.position (range map to) X
ELSE Null X.position is freeObviously I could just animate the arm’s movement to match the door but it seems to make more sense not to have to.
Graham
http://www.YouTube.com/ShiveringCactus – Free FX for amateur films
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2 Replies
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Hey Graham,
Here’s a setup that does what I think you’re trying to do: https://www.3danvil.com/tutorials/Door_IK_Controller.c4d
Basically it just sets the position of the arm’s controller null to the position of another null that can be placed anywhere in your heirarchy, but only if the door open slider is set to zero.
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Thanks for responding Adam, but actually that file was sort of the reverse of what i was looking for. The robot arm has nothing to do with the door mechanism, I wanted to manipulate it’s target so that it wouldn’t change it’s angle when the door opened.
Actually I have just figured it out myself, I placed my target Null object inside another Null. Then using Xpresso, I can set the parent Null to move with the door bringing the target Null with it. This way I get my controller alongside my other controllers, and have it move correctly with the larger animation.
Graham
http://www.YouTube.com/ShiveringCactus – Free FX for amateur films
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