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Custom attributes for the back wheels and connecting the back rails
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Delano Athias

Pluralsight

Delano Athias
In this lesson, we will create custom attributes to control the spinning of the back wheels, and we'll also constrain down the back rails. We'll get started by first heading over to our Outliner, and we'll make sure that our root joint is going to be stored underneath its group. OK, great. Next, let's select our chest control and create our custom attributes. So we know the first one is going to be displayable. We'll name it extra controls. Following that will be Spin A, and it will be animatable, as well as Spin B. With the chest control selected, let's load up the Connection Editor, making sure it's on output-- which it should be by default. And now we can grab our two back joints, load those in, and connect the Rotate X of Wheel A into Spin A. The same for Spin B. Now we can test these out. OK, great. So everything's working just fine. All right, so next, we can constrain down our back rails. Let's get to our Outliner. We'll grab one of our rail pieces. Hit the up arrow a few times to get to the Rail group. We'll frame it. So they're both contained in one group, and they have each a group of their own. So let's get these constrained down. We could always constrain them to the back tire. So if we were to select our tire mesh and grab one of the rail groups, we can use our Object Offset tool. You'll see that it does inherit values because of the offset that the wheel has, but it's not too big of a deal. I'm not too concerned with these animation controls, as they will only be used to, let's say, finesse the transformation. But it's not going to be taken too far. So if you wanted to, feel free to freeze transforms on those values, but I'm not going to do that. But what I will do is make sure that these curves are easy to grab. So I'm going to set the size to about a value of 70, and then grab the curve shape and just kind of move that over, rotate it down so matches the angle of the rail. Then we can start to translate it over. Another thing you could also do is use the Object Offset tool between the rail group and Joint B. That would also give you zero values. But again, because of how limited the animation will be on these objects, I'm not going to worry too much about that. All, right, great. So one is in place. We can recolor it from here. So that will be red. Let's take care of that. All right, great. So that just leaves us with one more. So we'll grab the tire again, we'll grab the left rail-- here it is, Rail LF. Run our Object Offset tool. Let's set the size to 70. And we will now bring over the shape. Then we'll want to rotate it down and have it match to the control on the right side. So we'll probably want to rotate it down just a little more on the x-axis and translate it over a little bit more, also in the X. I'd say we're good to go here. OK. Great. Well, let's recolor this. That'll be our last task. So find blue. And now we can test these out. So we can start to rotate these around. All right, great. So that's just fine. The pivot is, of course, going to be at the center of the wheel we've constrained them to. If you try to go in and center the pivot, there's going to be offset, of course. So again, we don't necessarily need to do that at all. The animation on these will be very limited. So we can go ahead and call the rails finished. And what I mean by limited is, just to make that very clear, we might use the control to kind of have the rail pop up to be put in place when the robot goes to biped mode. And when he is in truck mode, you may not even see these objects, not until it's time to show them when the robot is again near his final transformation for the shot sequence. So with something like that, it's not a big deal at all to spend too much time on a control logic that will be hardly used. Well, with that said, that's going to finish this lesson off. We do need to dynamically parent the back wheels to the character's torso, so we can work on that in the following lesson.
In this tutorial, we will learn the methods that were used to rig the transforming robot. Throughout these lessons, we will learn the tools and techniques used in the setup process of both our robot and truck. The goal is to break this complex idea down into a simple, and manageable form. We'll cover the rigging process in its entirety, and along this journey, we'll be introduced to several tools that will help make this all come together efficiently. By the end of the course, you'll have the set of skills needed to rig your own transforming robot.
Partner
Partner
Introduction and project overview
1

Introduction and project overview

 
00:49
Starting on the robot's rig
2

Starting on the robot's rig

 
08:10
Rigging the robot's left leg
3

Rigging the robot's left leg

 
13:49
Completing the left leg's base rig
4

Completing the left leg's base rig

 
15:30
Creating a hip joint and mirroing the left leg
5

Creating a hip joint and mirroing the left leg

 
05:38
Starting the foot roll rig
6

Starting the foot roll rig

 
09:51
Connecting the reverse foot rig
7

Connecting the reverse foot rig

 
10:26
Extra joints for toe bend control
8

Extra joints for toe bend control

 
04:56
Connecting the leg and hip meshs
9

Connecting the leg and hip meshs

 
13:59
Primary leg controls
10

Primary leg controls

 
08:54
Organizing the rig
11

Organizing the rig

 
04:42
Starting on an animator-friendly foot roll rig
12

Starting on an animator-friendly foot roll rig

 
07:34
Wiring the foot roll's plusMinusAverage nodes
13

Wiring the foot roll's plusMinusAverage nodes

 
09:26
Finishing the foot roll rig
14

Finishing the foot roll rig

 
06:21
Toe bend controls
15

Toe bend controls

 
10:51
Knee controls
16

Knee controls

 
07:54
Cleaning up the leg rig
17

Cleaning up the leg rig

 
07:45
Rigging the wheels connected to the robot's legs
18

Rigging the wheels connected to the robot's legs

 
07:37
Finalizing the leg wheels
19

Finalizing the leg wheels

 
10:53
Creating a hip control
20

Creating a hip control

 
07:13
Rigging the wheels connected to the robot's hip
21

Rigging the wheels connected to the robot's hip

 
06:48
Constraining the wheel geometry connected to the robot's hip
22

Constraining the wheel geometry connected to the robot's hip

 
04:23
Dynamically parenting the hip wheels
23

Dynamically parenting the hip wheels

 
10:03
Chest control
24

Chest control

 
08:21
Completing the chest rig
25

Completing the chest rig

 
10:15
Setting up the wheels connected to the back
26

Setting up the wheels connected to the back

 
06:13
Custom attributes for the back wheels and connecting the back rails
27

Custom attributes for the back wheels and connecting the back rails

 
06:30
Dynamically parenting the back wheels
28

Dynamically parenting the back wheels

 
03:00
Constraining the spine geometry
29

Constraining the spine geometry

 
05:45
Creating a center-of-gravity control
30

Creating a center-of-gravity control

 
03:36
Rigging the neck's base plates
31

Rigging the neck's base plates

 
06:12
Setting up the robot's main neck plates
32

Setting up the robot's main neck plates

 
06:48
Re-orienting the neck joints
33

Re-orienting the neck joints

 
01:56
Rigging the neck with inverse kinematics
34

Rigging the neck with inverse kinematics

 
07:36
Optimizing the scene
35

Optimizing the scene

 
02:03
Rigging the robot's head
36

Rigging the robot's head

 
08:49
Custom attribute for the neck's base plates
37

Custom attribute for the neck's base plates

 
02:41
Starting on the arms
38

Starting on the arms

 
07:27
Setting up the elbows
39

Setting up the elbows

 
09:07
Adding arm controls
40

Adding arm controls

 
05:08
Constraining the arm groups and connect curves for the elbows
41

Constraining the arm groups and connect curves for the elbows

 
10:14
Dynamically parenting the arms
42

Dynamically parenting the arms

 
02:27
Rigging the fingers
43

Rigging the fingers

 
08:01
Connecting the fingers
44

Connecting the fingers

 
03:11
Creating finger controls
45

Creating finger controls

 
05:38
Wrapping up the hands
46

Wrapping up the hands

 
12:29
Starting to rig the arm pistons.
47

Starting to rig the arm pistons.

 
06:39
Finalizing the pistons
48

Finalizing the pistons

 
12:20
Finishing the robot's rig
49

Finishing the robot's rig

 
08:00
Beginning the truck's rig
50

Beginning the truck's rig

 
03:14
Rigging the truck's wheels
51

Rigging the truck's wheels

 
04:13
Automating the wheel rotation of the truck
52

Automating the wheel rotation of the truck

 
07:14
Finishing the wheel rotation expression
53

Finishing the wheel rotation expression

 
02:53
Rigging the truck's body and controlling the front tires
54

Rigging the truck's body and controlling the front tires

 
05:14
A technique for simulating tire pressure
55

A technique for simulating tire pressure

 
03:21
Wrapping up the tires
56

Wrapping up the tires

 
08:40
Finalizing the transforming robot's rig
57

Finalizing the transforming robot's rig

 
07:08