How to use Behavior effects | HitFilm Pro

Welcome back to another tutorial everyone this week we’re going to be taking a look at the new behavior effects that were added in the latest version of hitfilm pro now this is not a comprehensive list since we plan to add more in the future but this should help you get started behaviors can be found in the effects panel or in their dedicated drop-down in the controls panel acceleration causes the lair to constantly be speeding up in a specified direction the value that you put in this field determines the rate of acceleration so if I set this to 100 it means that by the end of the first second the lair will be traveling at 100 pixels per second in this case I have a 3d model of a car that accelerates past the 3d camera the attract tube behavior allows you to have one layer move towards another here we have an earth and a moon PMG I’ll add the attract to behavior to the moon and under target select the earth the acceleration and the distance work together I’ll set the former to 200 pixels per second at the distance I choose now the moon will be accelerated towards the target object by the amount defined in the acceleration control if it’s outside the distance it’ll move slower in this case I wanted to start accelerating correctly right away so I’ll increase the distance to cover the moon now the target radius is easier to understand if I set it to zero which turns it off because of the underlying physics simulation that’s going on the attracting power of the earth will eventually fling the moon into infinity as it becomes too strong you want to set the target radius to the size of your attracting object this just makes the simulation more stable so it’s not exactly something that is meant to be customized but you can of course play around with it for different results the fall-off setting is pretty simple quadratic represents real life in terms of how the acceleration increases and decreases linear is smoother so again this setting depends on what look you’re going for the drag behavior is most useful when it’s applied to an object that is already in motion it’s like putting the brakes on when you’re driving the layer can come to a complete stop almost immediately or slow down over time it can also be used to just add resistance to whatever layer is in motion the follow behavior might make you think of parenting layers but it’s not quite the same thing here I have an animation with one layer moving around the screen the other image is currently stationary if I parent the non-moving dog layer to the adult it’ll stick directly to it rather than actually following the motion let’s undo that and add the follow behavior to the dog set the target to the adult and you should see in effect the attraction slider adjusts the strength and the target distance determines the minimum distance the dog will try to stay away from the adult if you need that to happen gravity is a downwards acceleration and it’s pretty straightforward there’s only one parameter that you can adjust and that is the starting acceleration of pixels per second for the object mix parent position is similar to parenting together but you get to choose exactly how much of the parents attribute that the child inherits here’s a stationary tennis ball and a basketball that bounces up and down if I add the mix parent position to the tennis ball then select the basketball as the source layer you’ll see the effect the tennis ball is currently taking 50% of the motion of the basketball I can raise that to 100% or take it even lower with the mixed slider here it’s taking the position of the basketball as well so you might have to move it if you make an adjustment to the mix the repeal from behavior will make one layer move away from another the settings are pretty much the same as a tract – but they just do the opposite the distance is the minimum separation between the main layer and the target layer once these two layers reach this distance from one another this layer will begin moving away from the target layer next up is rotate by layer here I have a simple clock setup created using planes the hour minute and second hands have all been masked into rectangle shapes which are currently not moving the anchor point has been moved to the bottom of each line after drawing the mask so that they’ll rotate appropriately if you want to download this project click the link in the description I’m going to use the rotate by layer behavior so that I only have to animate the second hand the minute and our hands will follow let’s go into the second hands control panel and activate keyframes for rotation skip to the end of the timeline and set it to something like 25 times over so that you can really see it spin with that done I’ll apply the rotate bilayer behavior to the minute hand first select the second layer in the first drop-down here it won’t do anything until you tell the layer which rotation axis to follow since the second hand is a 2d layer I’ll adjust the rotation Z amount if I set it to 100% the minute hand will stick to the second in this case I want it to move slower so I’ll set it to something more realistic like 15 percent playing it back you can now see the minute hand moving slower than the second let’s do the same for the our ad the behavior effect and tell it which layer to follow since the our hand is always the slowest I’ll set the rotation Z amount to 1% now we have a clock that is fully in motion the great thing about this setup is that if I want to make changes to the speed all I have to do is adjust the second hands keyframes let’s double that rotation speed and you can immediately see the resulting hour and minute hand positions the throw behavior is similar to acceleration but the lair will remain a constant speed which is set here so if you want your object to move but not always be accelerating use throw instead there is an acceleration time option if you want the lair to start a bit slower and gradually get faster over the first couple of seconds but once it hits the set speed it’ll stay there thanks for watching guys subscribe and follow on Twitter Facebook and Instagram for more visual effects and filmmaking content I’ll see you all in the next video you

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