Thanks guys - there is plenty to investigate here :) //MB
> Den 11. september 2017 klokken 16:50 skrev "Ponthieux, Joseph G. > (LARC-E1A)[LITES II]" <j.ponthi...@nasa.gov>: > > > Here is another example which is probably closer to what you really want. I'm > making that assumption of course with no knowledge of your scene. (BTW, > ignore the cone2 and pipe2, they are left behind as a result of my editing > the MEL. > > There are some details in the original MEL which are left out or cryptic. > This is an attempt to explain that. > > What you can't easily see in the MEL that I am doing at several steps, is > that when the Pipe and Cone are resting as children to locator2 I am > executing Freeze Transformations then Reset Transformations on both the Pipe > and Cone after all repositioning is final. This effectively zeroes them out > in relation to their parent. This works if everything is aligned properly in > original construction. > > The MEL command below that represents that freezing action on the transforms > is "makeIdentity". I use Freeze then Reset because Freeze zeroes out the > pivots, Reset zeroes out the transforms sending the transform "center" back > to "world zero". The actual MEL commands are : > > FreezeTransformations; > ResetTransformations; > > They are normally executed from Modify. They can be seen in MEL if you set > the script editor to Echo All Commands. It may not look like Reset is doing > anything if you have not moved the object away from world center. Reset's > action will only be evident if you move the object to something of non-zero > translation. Generally its just habit after 20 years, I always execute Freeze > then Reset as a default part of the process. If the object wasn't moved, it > wont hurt it. > > > A synopsis of the process is as follows: > > Create, rotate and move the pipe. Preferably at world center and its length > aligned with z axis. > Create, rotate, and move the cone (analog for a bullet I guess). Also at > world center and also aligned with z axis for z translation in relation to > the pipe. > Parent both under a locator. Also at World center. Do not move or change its > position or orientation. > Execute Freeze/Reset on both Pipe and Cone. > Move & rotate the locator at will. Cone should follow the pipe and be keyable > as translation only in the z axis to follow the pipe. > > > Here is the MEL to demonstrate. > > > > file -f -new; > CreatePolygonCone; > polyCone -r 1 -h 2 -sx 20 -sy 1 -sz 0 -ax 0 1 0 -rcp 0 -cuv 3 -ch 1; > setAttr "pCone1.rotateX" -90; > CreatePolygonPipe; > polyPipe -r 1 -h 2 -t 0.5 -sa 20 -sh 1 -sc 0 -ax 0 1 0 -cuv 1 -rcp 0 -ch 1; > setAttr "pPipe1.rotateX" -90; > select -cl ; > spaceLocator -p 0 0 0; > spaceLocator -p 0 0 0; > select -r locator1 ; > selectKey -clear ; > select -r locator2 ; > selectKey -clear ; > parent locator2 locator1 ; > parent pPipe1 locator2 ; > select -r pCone1 ; > selectKey -clear ; > parent pCone1 locator2 ; > select -r locator2 ; > selectKey -clear ; > select -r pPipe1 ; > selectKey -clear ; > makeIdentity -apply true -t 1 -r 1 -s 1 -n 0 -pn 1; > select -r pCone1 ; > selectKey -clear ; > makeIdentity -apply true -t 1 -r 1 -s 1 -n 0 -pn 1; > select -r pPipe1 ; > selectKey -clear ; > setAttr "pPipe1.scaleZ" 10; > select -addFirst polyPipe1 ; > setAttr "polyPipe1.thickness" .1; > makeIdentity -apply true -t 1 -r 1 -s 1 -n 0 -pn 1; > select -r locator1 ; > selectKey -clear ; > rotate -r -os -fo 32.234531 0 0 ; > rotate -r -os -fo 0 33.615086 0 ; > select -r pCone1 ; > selectKey -clear ; > if( `getAttr -k "pCone1.tz"`||`getAttr -channelBox "pCone1.tz"` )setKeyframe > "pCone1.tz"; > currentTime 30 ; > move -r -ls -wd 0 0 -37.704086 ; > if( `getAttr -k "pCone1.tz"`||`getAttr -channelBox "pCone1.tz"` )setKeyframe > "pCone1.tz"; > > > > > Joey > > > > > > > -----Original Message----- > From: softimage-boun...@listproc.autodesk.com > [mailto:softimage-boun...@listproc.autodesk.com] On Behalf Of Ponthieux, > Joseph G. (LARC-E1A)[LITES II] > Sent: Monday, September 11, 2017 9:52 AM > To: softimage@listproc.autodesk.com > Subject: RE: Maya - what were they thinking 2 - transforms > > More than likely this has something to do with the way your hierarchy is > organized. There is no reason why you can't do this. The key to making this > work is that the gun cannot have had its pivot or transforms modified in > relation to the child. The object as child to the gun must be zero-centric to > it. In other words, the gun must be the "world" coordinates for the gun. Does > that make sense? > > Run the MEL commands below in your script editor in an empty scene. See > specifically the angle of locator2 and the keyframed z translation of pCone1. > Move locator1 around at will, and you can change the orientation of locator2 > if you desire, but the cone's motion is always maintained on Z axis relative > everything it is parented to. And it is only animated explicitly on Z. See > the Graph editor for pCone1. Is this similar to what you are trying to > accomplish? > > > > > file -f -new; > spaceLocator -p 0 0 0; > updateRenderOverride; > spaceLocator -p 0 0 0; > CreatePolygonCone; > polyCone -r 1 -h 2 -sx 20 -sy 1 -sz 0 -ax 0 1 0 -rcp 0 -cuv 3 -ch 1; parent > pCone1 locator2 ; select -r locator2 ; selectKey -clear ; parent locator2 > locator1 ; select -r locator2 ; selectKey -clear ; rotate -r -os -fo 9.453111 > 0 0 ; setAttr "locator2.rotateX" 45; select -r pCone1 ; selectKey -clear ; > if( `getAttr -k "pCone1.tz"`||`getAttr -channelBox "pCone1.tz"` )setKeyframe > "pCone1.tz"; currentTime 30 ; move -r -ls -wd 0 0 -8.127347 ; if( `getAttr -k > "pCone1.tz"`||`getAttr -channelBox "pCone1.tz"` )setKeyframe "pCone1.tz"; > currentTime 22 ; selectKey -clear ; currentTime 15 ; select -r locator2 ; > selectKey -clear ; select -r locator2 pCone1 ; selectKey -clear ; select -r > pCone1 ; selectKey -clear ; > > > > > > Joey Ponthieux > __________________________________________________ > Opinions stated here-in are strictly those of the author and do not > represent the opinions of NASA or any other party. > > > > > > > -----Original Message----- > From: softimage-boun...@listproc.autodesk.com > [mailto:softimage-boun...@listproc.autodesk.com] On Behalf Of Morten Bartholdy > Sent: Monday, September 11, 2017 6:17 AM > To: Userlist, Softimage <softimage@listproc.autodesk.com> > Subject: Maya - what were they thinking 2 - transforms > > So I understand (to some degree) that there are fundamental differences > between the way transformations are handled in Maya vs Soft, but I just ran > into something which on the surface looks simple, but is quite mindboggling. > Hopefully it is just a case of Mayas way of hiding useful stuff in some > obscure submenu or relationship editor, but here goes: > > I am doing some very simple keyframe animation in Maya (one of the few things > that does not drive me entirely crazy) and am animating a thingy which is > parented to a gun which is pointed in a particular direction. I just want it > to fly of on its local z-axis so I select it, set Transform Tool Settings, > Axis Orientation to Object, key frame translate out along z-axis and > keyframe. Now I want to edit the function curves to make sure it accelerates > as desired, open the graph editor and see graph representation of its motion > is in world space, ie. it is not only animated on the z-axis, but also on x > and Y. Obviously editing these curves manually will easily lead to having > the object not flying in a straight line... > > In this case I could draw a curve to use as motion path, but is is more > cumbersome (like so many things in Maya) and for many reasons I would really > prefer to be able to switch between World space and Object space in the Graph > Editor. Our resident Maya artist has looked for similar functionality many > times through different Maya versions, so far without luck, so she can not > offer relief from this specific lack of brainpower on the part of the Maya > devs. > > Can Maya knowledgeable people here confirm this fundamental lack of > functionality or perhaps tell where I find it, or barring that, offer advice > regarding how to achieve something similar? > > Thanks (sigh) > > Morten > ------ > Softimage Mailing List. > To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com with > "unsubscribe" in the subject, and reply to confirm. > > ------ > Softimage Mailing List. > To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com with > "unsubscribe" in the subject, and reply to confirm. > > ------ > Softimage Mailing List. > To unsubscribe, send a mail to softimage-requ...@listproc.autodesk.com with > "unsubscribe" in the subject, and reply to confirm. ------ Softimage Mailing List. 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