Forums Technical Discussion Expression problem vector/angle

Expression problem vector/angle

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mickyblue
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hi

need a the angle between to bones.

tried this…

vangle(vrorigin(“”,“../chain_bone1),vrorigin(”“,”../chain_bone2))


thanks
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tamte
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this is the expression you need
180-vangle(vector3(0,0,1),vtorigin(“../chain_bone2”, “../chain_bone1”))

make sure chain_bone2 is a child of chain_bone1 and not the other way around
Tomas Slancik
CG Supervisor
Framestore, NY
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mickyblue
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Thanks!
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edward
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There's also boneangle() btw.
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mickyblue
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Thanks!… Good to know! Its also good to know the general way.
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mickyblue
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Any chance to define just one axis with the boneangle expression?

Thanks
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edward
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Sorry, I don't understand. The boneangle() only returns a single angle, around the axis perpendicular to the two bone directions.
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mickyblue
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I want to isolate my focus on just one axis… Lets say i have an shoulder ball joint situation where i want to look at the axis seperatly. How would i go for that…

Seem like a case where i need to use the vangle and vector expressions…!?
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edward
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Then yes. The boneangle() expression is just convenient for the common case.
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