Exactly! The joint's are in hierarchy and just by reading the values of translation (local translation), you never get the proper vector, of joint direction.
2011/11/21 rudi <[email protected]> > By the way, why the translation data don´t workto get vectors?It is > because the translation data is in local space? > > On Nov 21, 5:49 pm, rudi <[email protected]> wrote: > > Thanks. I am going to try it out > > > > On Nov 21, 5:27 pm, Kamil Hepner <[email protected]> wrote: > > > > > > > > > > > > > > > > > It's quite simple, you must use decomposeMatrix node to get information > > > about postion of joint in the worldSpace. > > > > > lets say we have the decomposeMartix for jointBaseA, named jointBaseA > > > > > jointBaseA.worldMatrix -> jointBaseA.inputMatrix > > > jointBaseB.worldMatrix -> jointBaseB.inputMatrix > > > > > And for the end joints... > > > jointEndA.worldMatrix -> jointEndA.inputMatrix > > > jointEndB.worldMatrix -> jointEndB.inputMatrix > > > > > now we substract the value the outTranslation of jointBase from the > > > jointEnd and we get, the vector > > > so... > > > > > jointAVector is plusMinusAverage Node > > > > > jointEndA_M.outputTranslate -> jointAVector.input3D[0] > > > jointBaseA_M.outputTranslate -> jointAVector.input3D[1] > > > > > You do the same setup for jointB, and at the end you will be have two > > > vectors > > > jointAVector and jointBVector (which are plusMinusAverage Nodes), and > you > > > can easily connect it into angleBetween node > > > > > Cya! > > > > > 2011/11/21 rudi <[email protected]> > > > > > > Hi, > > > > > > Lets say that i have 2 joint chains: jointBaseA, jointEndA (child of > > > > joinBaseA) And jointBaseB, jointEndB (child of joinBaseB) > > > > I want to extract the vectorA created by jointBaseA, jointEndA and a > > > > vectorB by jointBaseB, jointEndB. > > > > Then I want to take vectorA and plug it in in the input vector1 of > the > > > > node angleBetween and take vectorB and plug it in in the input > > > > vector2. > > > > So the output of the angleBetween is the angle between the 2 chains. > > > > > > I tried to take the translation data of the jointBase and the > jointEnd > > > > to put them in plusMinus node with subtract operation, and plus the > > > > output > > > > of this plusMinus node to the vector1 and vector2...but I am getting > > > > wrong vectors, I don´t know why... > > > > > > To sum up, how can just get the angle between 2 joint chains? Is > there > > > > a node to get faster the vectors of the chains? > > > > > > Cheers > > > > > > -- > > > > view archives:http://groups.google.com/group/python_inside_maya > > > > change your subscription settings: > > > >http://groups.google.com/group/python_inside_maya/subscribe > > -- > view archives: http://groups.google.com/group/python_inside_maya > change your subscription settings: > http://groups.google.com/group/python_inside_maya/subscribe > -- view archives: http://groups.google.com/group/python_inside_maya change your subscription settings: http://groups.google.com/group/python_inside_maya/subscribe
