Also, if you really want to make this easier then you can add an attribute to
the cone as a keyable integer.
Call it “StickTo” for example.
Then create a MEL expression as follows:
string $stick_to = pCone1.StickTo;
if ( $stick_to == 1 ) {
pCone1_pointConstraint1.pSphere1W0=1;
pCone1_pointConstraint1.pSphere2W1=0;
pCone1_pointConstraint1.pSphere3W2=0;
} else if ( $stick_to == 2 ) {
pCone1_pointConstraint1.pSphere1W0=0;
pCone1_pointConstraint1.pSphere2W1=1;
pCone1_pointConstraint1.pSphere3W2=0;
} else if ( $stick_to == 3 ) {
pCone1_pointConstraint1.pSphere1W0=0;
pCone1_pointConstraint1.pSphere2W1=0;
pCone1_pointConstraint1.pSphere3W2=1;
} else
print ("No constraint assigned!\n");
Keyframe “StickTo” in the cone attributes to 1 for pSphere 1, 2 for pSphere2,
and so on.
By doing this, all you have to do is keyframe the new StickTo attribute in the
Cone from 1, to 2, to 3 at the appropriate time to use the relevant constraint
to change who “owns” the cone as it moves from one item to the next.
This is probably closer to what you are wanting anyway since I suspect you will
only want the weights to go from 0 directly to 1 at the same frame rather
transition over time. You can do it without the expression but this just
manages it down to one attribute and may also reduce the number of keyframes
you’ll have to create.
Joey
From: [email protected]
[mailto:[email protected]] On Behalf Of Ponthieux, Joseph
G. (LARC-E1A)[LITES II]
Sent: Sunday, September 10, 2017 11:07 AM
To: [email protected]
Subject: RE: maya constrain from SI perspective
Mirko,
Create 3 spheres and randomly place them in an empty scene
Create a cone
Select the objects in the following order via ctrl->left click select
1.pSphere1
2.pSphere2
3.pSphere3
4.pCone1
Execute ANIMATION->Constrain->Point (make sure you are using the defaults for
this constraint)
You will find that a pCone1_pointConstraint1 operator has been placed under the
pCone1 object and the cone should take a position central in space to the
position all three spheres. If so, it is now position constrained to those
spheres.
Select pCone1
In the Channel Editor you will see the constraint operator in the shape list
and it will possess 3 weight parameters for the constraint
(W0,W1, and W2 for sphere 1, 2 & 3 respectively)
At frame 1 keyframe the following:
w0 = 1, w1 = 0, w2 = 0
At frame 15 keyframe the following:
w0 = 0, w1 = 1, w2 = 0
At frame 30 keyframe the following:
w0 = 0, w1 = 0, w2 = 1
When you play it back the cone will transition via constraint from sphere 1 to
2 to 3 over the 30 frame period
Now animate all the sphere positions in whatever way you choose over that 30
frame period. The cone will still follow the spheres according to the weights
previously keyframed.
Does that help?
If you need more control than this make a copy of the cone. Constrain cone 1 to
sphere 1 & 2. Constrain cone 2 to sphere 2&3. Animate the weights to control
each. Write an expression to set visibility for each cone when the constraint
weight is less than 1 or greater than 0 for example so that the cones hide
automatically. In other words when the first cone arrives at sphere 2 cone 1
should hide and the cone 2 should unhide. You can write one expression to
evaluate all objects and weights simultaneously.
Joey
From:
[email protected]<mailto:[email protected]>
[mailto:[email protected]] On Behalf Of Mirko Jankovic
Sent: Sunday, September 10, 2017 3:39 AM
To: [email protected]<mailto:[email protected]>
Subject: maya constrain from SI perspective
Ok, please,, how the F you live in maya with it's constrains and worse more
animating them??
Am I so stuck in SI workflow that I simply can;t go down the rabbit hole in
maya on this or are they really taht retarded and complicxated for simple
animation?
Constraing object A on object B,m then translate it to object C and then on to
object D...
Something as simple as for exmaple pick up hat from the head, and give it to
another guy and he puts it in his head.... The F!!! the HORROR!
Any tips and advice please?
Also I did try like zv parent script which is kinda good but it doesn;t really
work with referenced objects so. no go..
[https://mailfoogae.appspot.com/t?sender=abWlya29qLmFuaW1hdG9yQGdtYWlsLmNvbQ%3D%3D&type=zerocontent&guid=8fabcf63-42b4-4212-a7b0-d54921aaef61]ᐧ
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