the split screen demonstrated is really cool

I come back to reference this talk every now and then so 0:00 Overview 2:41 Juice intro 3:27 Camera shake 6:40 Camera shake 2D 7:27 Camera shake 3D 9:53 Camera shake implementation 15:07 Camera shake takeaways 15:37 Smoothed motion 21:26 Framing 27:00 Voronoi split-screen cameras

Holy frick this is an insanely good presentation. You don't think about these things when you play games but they make a world of a difference. Even his silly little platformer demo for this instantly gave me a "polished" vibe just because of the smooth camera.

A tiny improvement on asymptotic averaging for anyone who comes by: if you're doing the timestep-dependent variant, i.e. x += (targetx - x) * smoothness * timestep, it's better to do x += (targetx - x) * min(1.0, smoothness * timestep) so that you don't overshoot when your timestep gets too large (e.g. unexpected lags, framerate drops, etc).

Squirrel Eiserloh was my game programming professor at SMU Guildhall. He was the best teacher I ever had. The most amazing person, who explained complex concepts in such a cool, interesting and easy-to-understand manner. Everyone has their No. 1 teacher that they remember fondly for the rest of their lives. For me, that teacher is Squirrel Eiserloh.

The part about camera shake was very insightful

This talk deserved to be a full hour; great talk and especially good for the limited time allowed.

Great talk, very well explained and no wasting time

Instead of Asymptotic Averaging, I would recommend using damping, which is effectively the same, but takes a delta time into account so it's not framerate dependent. Equation is very simple: (src * factor + dest * dt) / (factor + dt), where src is the source (starting) value, dest is the destination (target) value, factor is the damping factor (0 = instant, and you can go up from there), and dt is the delta time or frame time.

Great talk! I keep coming back to it every now and then. Using perlin noise instead of simple random numbers or designing different rules for camera movement in certain directions are the things that are easy to overlook and not even consider but they could make a huge difference in making sure that your game just feels right. One interesting thing to point out is that for some games you can choose not to shake the camera itself but rather to shake the UI. I've just noticed this in Doom (2016) and it appears to work well. The player's camera does not move at all, but all the interface elements do. Great way to add "weight" and "juice" to explosions and hits without messing with the player's aim or spatial awareness. There's still vertical recoil from some of your own shots but that's rather standard and expected by players anyway. I assume shaking the UI works best if you have UI elements in most if not every corner of the screen so that it feels more immersive.

The Voronoi split screen technique is bloody brilliant!

This is a FANTASTIC talk. Concise and extremely helpful.

Excellent talk, very clear and detailed yet focused and concise.

Screen Shake is so important that early arcade games used to make up for the hardware's inability to do screen shake by flashing the colors of the screen. The effect can be really intense and deadly to epileptics. I'm really glad that we can now do screen shake. This effect is subtler, and by that I mean that it's still intense but only as intense as it needs to be.

that was really helpful, especially since you had visual examples. Thank you for sharing

Superb!!! This is a brilliant example of how to make an interesting and informative presentation.

Cool stuff! Would love to see more details about that Voronoi screen-splitting.

1) Camera shake in 3D, Translation helps show how it effects your hero in a 3rd person game and foreground, while Rotation is mostly going to effect things in the distance or background. Typically in 3D you also want to reduce the amount of roll you do, as that tends to make people sick. While your argument for no translation movement (or is very bad) might be accurate for a First Person game, I think it's incorrect with a 3rd person game. 2) Camera shake in VR can be done, but in general you want to use all translation changes Vs rotation (because Rotation will make people sick). We had camera shake in Lone Echo 1 & 2 with just translation and it worked very well. Overall an amazing talk!

I am not at all in the game development area, I am just a mere gamer, but this was extremely interesting and very well explained. Great presentation of a very interesting aspect of games !

Terrific talk. Lots of very practical and useful information.

Actually on my forth beer when 9:00 . Was gettin a bit dizzy, TY for killing that slide.

Great and very efficient talk. Thanks a lot

Wow, well done presentation!

Awesome talk, thank you. I don't remember seeing this kind of split in any game. One famous game that unfortunately messed up the multiplayer camera is Spelunky.

Amazing video, full of excellent programming tips and tricks !

Very interesting talk, I've been thinking of making a splitscreen of this sot for some time now.

the demos are so high quality

awesome talk. every point was useful

The talks that he referenced: The Art of Screenshake: ukposts.info/have/v-deo/eXqVeaeqqoSLjok.html Juice it or Lose it: ukposts.info/have/v-deo/fqlhlXl7pJ2f2Zs.html

That star wars camera always blew me away. I'd love to do that myself someday.

This was fantastic and really useful!

Thunbs up fo split scrren demonstration :)

note: in practice, for 3d (projected onto a 2d screen), pitch and yaw _are like_ "2d translation" and roll _like_ "2d rotation", so 3d rotation by itself is "equal to" 2d's rotation+translation, which is preferred, and 3d translation a bad kinda jittering ground effect dependant on perspective that, if you even _could_ do in 2d, _you would avoid like the plague_ so in essence, good camera shake in 2d and 3d "work the same"

These are great resources

Very good presentation! I used to work at Tt Games (didn't implement the split-screen myself though). A friend of mine told me that the split-screen in Lego Star Wars made him dizzy though. Luckily, it can be disabled in settings.

The exponential increase shake feels wrong when implemented in rapid shooting weapon. The early shoots will have no noticeable recoil feel. But it seems great to emphasize killing streak or successive combo. I think we should have several instances of shake in different intensity and amplitude for various context such as explosions, shoots, constant shake etc.

The slides are at mathforgameprogrammers dot com

Super interesting. I'd love to look more into the split-screen thing, but the site mentioned doesn't have this talk...

This is great

This guy blows it out of the water every year

that focal point could be a good idea for a classic resident evil, the camera can move, but every area could have a point of interest making that cinematic camera effect

For vr, why not use a post processing blur variance to make it feel like a camera shake without causing the person to dispose of their recent meal.

learned a new word today: "asthmatotic"

One more comment for shake screen in 3D - dont mess up the players aim (what their cross hairs point at or what they would interact with if clicking) unless its your specific intent that their aim be thrown off. Its likely you would do both, but make sure whatever happens is on purpose not an accident or side effect.

You could make a whole game centered around the splitscreen technique!

5:34 now that's I call teaching 😃

How do you choose which perpendiculars to use to create the boundary edges?

Anyone know where the mentioned "Interpolations and Splines" GDC video from 2012 referenced at 17:08 is at?

I hope he didn't quite rudely kicked out the previous speaker...

Does anybody know where to find the talks mentioned at the end? "Fast and Funky 1D Nonlinear Transforms (GDC 2015)" "Random Numbers (GDC 2014)" "Interpolation and splines (GDC 2012)"

Are they using clip-on stereo mics ... ?

The 4 player voronoi regions look like they could have been made more accurate. I don't blame him for not doing it though, that sounds like it'd be a real pain.

31:23 Interesting stuff. Where is his "Interpolations and Splines" video? (last text from that slide)

Graphs I have seen of Perlin noise look like smoothly connected "hills" and "valleys". Wouldn't the small offset of +1 for the seeds result in only a small variation in values since it will get the values of a parallel set of points only slightly offset from the series "above" and "below" it?

Do somebody have a link to the slides?

So, how would that awesome split-screen work in a 3D environment?

Where I can get this asymptotic averaging tool

I just wonder why it wasn’t mentioned that asymptotic averaging can just be implemented with Lerp, it’s an easy way to let people understand lerp if you describe it like the talk did, but then quickly point to the function as the shorthand afterwards.

20:50 Wait, can't this be done with power function?

trama, parabula, and cetera

Split screen was wow! The rest pretty standard.

Only rotational in 2D is pretty good for failed actions or locked choices.

Good talk. I keep seeing Ben Affleck looking at the speaker

You would think the GDC team could find better audio technicians! take the left Chanel, compress it then copy it to the right channel, that will eliminate the phasing and panning!!!! :)

The intro sound feels like you're eating a cockroach

You could do camera shake in vr with a shader that only effects the edge of the player's vision, keeping their focus clear and having the effect more in the background

Good knowledge in the shake and follow sections but that voronoi split, while being conceptually 'cool' because it's new and different, seems just awful in every other way.

Who is Math and why does want to juice me?!

At 28:32 'player' become male. Both of them. They each get half the screen.

that's barbaric that they dont let people finish their presentations, Im sure no one of the audience wouldn't mind

please dont do the "lazy" camera follow in platformers that was shown at the start of this talk. instead you want the camera to do the opposite, the center of the camera ought to be IN FRONT of the player respective to what direction they're moving, not behind as is the case in this video.

17:08 for later me

Pro tip for screen shake: Put a toggle in the game options and don't put too much effort into the actual effect cause 95% of players will set it to off.

shaking - author is confounding feeling with visual effect. As a player I HATE this type of shit, but I bet marketing types find it looking great in demos.

yes, screen shake. the option EVERYONE turns off if available, why do devs continue to do this.

Those are nice technics, but where is the math?

Somebody tell this guy that translation includes rotation!

I always disable the shitty diagonal splitscreen garbage lmao

Him clearing his throat every few sentences is very distracting.