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Adding an animation override

From: Creating Simulations in MassFX and 3ds Max

Video: Adding an animation override

As with the planning and preproduction phases of our simulation pipeline, taking the time to bake and then review a simulation is going to be an important factor, in terms of the quality we get from our final product. If we skimp on or even skip pass this stage, we may well end up with a substandard, maybe even unacceptable, final result. It is of course entirely possible to find that we have a perfectly good simulation at this point, especially if we are an experienced simulation artist. On the other hand though, we may find on close inspection that there are just one or two elements spoiling what we have.

Adding an animation override

As with the planning and preproduction phases of our simulation pipeline, taking the time to bake and then review a simulation is going to be an important factor, in terms of the quality we get from our final product. If we skimp on or even skip pass this stage, we may well end up with a substandard, maybe even unacceptable, final result. It is of course entirely possible to find that we have a perfectly good simulation at this point, especially if we are an experienced simulation artist. On the other hand though, we may find on close inspection that there are just one or two elements spoiling what we have.

In some such situations, rather than unbaking, tweaking parameters, resimulating, and then rebaking, we may well want to go ahead and simply add an animation override layer that will allow us to tweak those one or two elements just a little. As we have already noted from our review, we do have just such an element. Rather than have this single can seemingly pop out from behind the stack and then come to a somewhat odd stop, I would like to adjust the speed and final resting position just a little so that it doesn't draw quite so much attention to itself.

The first thing I want to do here is isolate the objects that I will be wanting to focus on. As I already have my can selected, I'm just going to hold down the Ctrl key and then add the stand geometry to my selection. Now, I can right-click in the viewport and use the Isolate Selection command. Something else that I want to do here, something that can be very helpful in terms of being able to work quickly and easily, is to switch over to an orthographic view. Now, I know that my stand geometry is aligned to my front view, so I'm just going to use the F keyboard shortcut to switch to that.

Now, we are ready to work with our animation layers. If we don't have the Animation Layers toolbar enabled, we can either follow the commands through the Animation menu to enable it or we could simply right-click in an empty area of a toolbar and select Animation Layers from the list. Once we have the floating toolbar, we may want to dock it to the user interface, which is exactly what I'll do here. Now first, most of our options are grayed out. This is because we need to specifically enable the animation layer system. We do this by means of this button on the far left of the toolbar.

Clicking it brings up a Layer Controller dialog. In this particular instance, the Position and Rotation options will be more than sufficient for us to work with, so let's uncheck Scale and click OK. Now, as you can see, the animation layer system comes to life and we can come over and click the Add Anim Layer button. We will of course want to give our new layer a descriptive name, so Can_Override should work nicely in this particular case. And we do want to choose the Default Controller option. Once that's done, we can click OK.

At this point, even with our animation layer system enabled, we can still scrub through our timeline so that we can observe the current animation applied to our geometry. We will be doing this so that we can determine just where we want to add our override keys. Frame 0 is naturally where we want to start, so let's enable our Set Key option. Before we add any keys though, I just want to make certain that we are only adding position and rotation keys. The fewer keys we create, the easier our data will be to edit, should we need to do so.

So, let's click on the Key Filters button and make certain that only Position and Rotation are checked. The final piece of prepwork needed here is to make certain that only our can is selected. With the stand selected, we would of course be adding keyframes to that geometry also. So, now that we're set up, we can just click the Add Key button while we are at frame 0 to add position and rotation keys there. And if we scrub forward with the Time slider now, I would think somewhere around about frame 59 is where we're going to want to add our next set of keys.

So, with the playhead parked there, we can again hit the Key button and then pushing forward, I think frame 73 seems to be just about where our can has finally come to its resting position, so we can add another set of keys here. Up to this point of course, all we've done is add placeholder keys to our animation timeline. We have set points that we either want to keep the position and rotation of our object as it currently is, or this is the spot at which we will want to make some alterations. In this particular instance, it really is only the last frame, the settled frame, that I need to make any changes to.

So, with our playhead at frame 73, I'm just going to enable the Move tool and then just pull our can back a little bit in the X axis. We'll of course want to then rekey its new position. Now, we can turn Set Key off. We can right-click and effectively un-isolate our scene. And if we switch back now to our main camera view, we can play the animation. And as you can see, our can doesn't look anywhere near as distracting as it did before.

The ability to somewhat post direct our simulations can be an extremely important and powerful feature. Being able to quickly add animation overrides using 3ds Max's animation layers means we can quickly and easily deal with slight motion discrepancies in our simulations without the need to go back into our simulation and rework all of its settings.

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This video is part of

Image for Creating Simulations in MassFX and 3ds Max
Creating Simulations in MassFX and 3ds Max

51 video lessons · 2469 viewers

Brian Bradley
Author

 
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  1. 3m 27s
    1. Welcome
      58s
    2. Working with the exercise files
      46s
    3. Setting up the 3ds Max project structure
      1m 43s
  2. 39m 20s
    1. Why simulate and not animate?
      3m 38s
    2. A look at gravity and drag
      3m 55s
    3. Understanding volume, mass, and density
      3m 45s
    4. What are Newton's laws of motion?
      3m 20s
    5. Finding believable frames per second and substeps
      3m 5s
    6. Understanding the difference between rigid and soft bodies
      3m 28s
    7. More about rigid body types
      3m 32s
    8. How collisions are calculated
      4m 35s
    9. Learning the difference between concave and convex meshes
      6m 24s
    10. What is a constraint and how do we use it?
      3m 38s
  3. 24m 20s
    1. A look at the MassFX and the 3ds Max user interfaces
      5m 52s
    2. Exploring the MassFX workflow
      5m 14s
    3. Discovering ground collision and gravity
      4m 49s
    4. Adjusting substeps and solver iterations
      3m 43s
    5. Using the Multi-Editor and the MassFX Visualizer
      4m 42s
  4. 44m 11s
    1. Breaking down the shot
      4m 51s
    2. Setting up the launchers
      3m 59s
    3. Setting up the drop system
      4m 30s
    4. Prepping the cans
      3m 33s
    5. Refining the simulation on the launchers
      5m 9s
    6. Refining the simulation on the colliders
      6m 5s
    7. Baking out the simulation for rendering
      5m 37s
    8. Reviewing the simulation with an animation sequence
      5m 3s
    9. Adding an animation override
      5m 24s
  5. 33m 32s
    1. Adding a rigid constraint and creating breakability
      8m 3s
    2. Creating a moving target with the Slide constraint
      4m 47s
    3. Creating springy targets with the Hinge constraint
      5m 59s
    4. Spinning targets using the Twist constraint
      4m 57s
    5. Creating crazy targets with the Ball & Socket constraint
      4m 58s
    6. Constructing a MassFX Ragdoll
      4m 48s
  6. 36m 51s
    1. Applying the mCloth modifier and pinning the hammock
      5m 55s
    2. Setting up the hammock's physical properties
      5m 39s
    3. Working with the mCloth interaction controls
      6m 14s
    4. Attaching the hammock to animated objects
      4m 5s
    5. Putting a rip in mCloth
      6m 14s
    6. Using mCloth to create a rope object
      4m 53s
    7. Creating a soft body object
      3m 51s
  7. 14m 47s
    1. Adding forces to a simulation
      5m 27s
    2. Putting forces to practical use
      5m 33s
    3. Using forces with mCloth
      3m 47s
  8. 35m 27s
    1. Walking through mParticles
      4m 38s
    2. Using fracture geometry
      6m 0s
    3. Creating breakable glue: Part 1
      4m 19s
    4. Creating breakable glue: Part 2
      5m 19s
    5. Creating a gloopy fluid: Part 1
      4m 14s
    6. Creating a gloopy fluid: Part 2
      4m 41s
    7. Adding forces to mParticles
      6m 16s
  9. 1m 5s
    1. What's next?
      1m 5s

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