3D Tracer Lines Animation | After Effects 2021

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Expressions for the video, sourced from videocopilot.net
X Position:
x=thisComp.layer("Null 1").transform.position[0]-thisComp.width/2;
x/thisComp.width
Y Position:
y=thisComp.layer("Null 1").transform.position[1]-thisComp.height/2;
y/thisComp.width
Z Position:
z=thisComp.layer("Null 1").transform.position[2];
z/thisComp.width
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[@FlatPackFX]

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[@Playaction_Jackson]

how do you keep the line that your null makes smooth? Mine are sharp vs your smooth line around 4:39

[@TaquitoBunny0523]

OMG! Thank you so much for this video. This is EXACTLY what I was needing. I love the way that you taught it. (I am kind of a beginner-mid user). And I can follow this perfectly. Now...off to create all of my video. I'm making a video for my BFA graduation reel for college. This makes me super excited to do that project. Thanks again!

[@LucilleATL]

Hey there, thank you so much for the tutorial, you're currently saving my uni-project!! BUT do you have any solution to the line appearing kind of edgy in curves, eventhough the Bézier curve underneath is perfectly round? :(

[@Timon2200]

Thank you for making the extra step of showing us how to make it in 3D. I watched a bunch of tutorials and yours was the only one that explained the true 3D method. Thank you!

[@danysthalincomunicador9494]

Soy de peru y no se ingles, me costo entender pero gracias me ayudo en mi proyecto

[@AdrianLiranRoll]

Thank you!

[@SamoanFarmer]

My path wont pick up the gradient ramp changes in colour. Love your videos

[@Playaction_Jackson]

Hey @FlatPackFx , how do you keep the line that your null makes smooth? Mine are sharp vs your smooth line around 4:39

[@marthamoore834]

Great video! For the second method - what to do if I don't want the line to reveal itself during the video, but instead be permanently on display?

[@nkazhst.portfolio]

How u did this rounded line at 4:37. I can only make a straight one🥲

[@dudedealsofficial]

same

[@medkarim7107]

you talking so much for simple trick

[@FEDERICOLEGORRETA]

I have a complete scene exported from 3ds max with nulls objects, i linke 3 axes from position, but i cant find how link rotate!, because my particle system is flat. can i do that with this method?

[@subhashdubey7146]

hello sir this course higher amount in India

[@360gez]

Why are subtitles off?

[@habeshakings15]

what software are you using . i could not make this thing in powerpoint.

[@FlatPackFX]

It’s Adobe after effects, not possible in power point.

[@habeshakings15]

Thank so so much.

[@Mr.Doruko]

We need subtitles,Ty for train

[@JohnnyBfromOKC]

This is exactly what I was wanting to learn! Thank you! You covered so much in so little time. 👍👍

[@AbdulSamad-ov1rx]

What if the drone is moving too fast and constantly the frame is changing what to to in such situation I'm trying alot but it ain't working

[@FlatPackFX]

I would use Mocha (follow the example in my latest UA-cam video). The only other option is to manually place a line.

[@AbdulSamad-ov1rx]

@@FlatPackFX The drone in the video is moving really fast and I have to track a golf course

[@hailongngo]

Thank you so much for your tutorial! It's so helpful

[@FlatPackFX]

No worries, I appreciate you watching and supporting the channel ✌️

[@johncrisoctaviano]

Very nice tutorial man. Goodjob keep it up!

[@FlatPackFX]

Thanks man ✌️

[@nahasibrahim8244]

Good

[@lammshots]

At 4:38, when you're creating the 3D path, how are you getting the path to curve between the keyframes instead of a straight line between each?

[@FlatPackFX]

Click and drag in stead of just clicking. This will create bezier points you can adjust.

[@206_golf]

press g on your keyboard and control click one of the points on the screen

[@artur_ry]

So cool trick! TnX!

[@JayBaggio]

great tut as usual thanks!! however at 4:38 for me it was not clear if u are also changing the z values or not? and if u are, how do you know the right values? thanks

[@FlatPackFX]

Hey Jay, yes i'm changing the z space as well as the x and y. The values will depend on your clip, just keep moving and then playing back to see how it looks. It's really just about positioning the curve based on your eye.

[@edlawton]

Hi there love your vids man, Ive tried doing this with a normal golf swing video to trace the ball in real time, however when I add the particle world it comes up with a syntax error. is there a way to fix this?
After Effects warning: Expression Disabled
Error at line 1 in property 'Position Z' of layer 3 ('Dark Gray Solid 1') in comp
'IMG 4154'.
SyntaxError: Invalid or unexpected token
z=thisComp.layer("Track Null 1").transform.position[2];
z/thisComp.width

[@MikeHamMan]

So with those expressions, you just copy and paste? Why though? What if there's a different scene? How would I know what type of expression to input? What do those expressions mean?

[@FlatPackFX]

The expressions are just there to keep the effect cantered it’s up to you to animate the effect. You can do this using the controls as shown not through the expression itself.

[@MikeHamMan]

@@FlatPackFX Ah, gotcha. Thanks for clarifying!

[@subhashdubey7146]

I need your course

[@martinbartos81]

Nice! Thank you ;)

[@joshdiditt]

Hey. I have been looking for a long time for the effect you did at 1:02-1:04 where the screen is following the line and the whole composition follows. I work in Resolve. Could you tell me how I could do that effect as best you can and I will try to replicate it in Davinci?

[@FlatPackFX]

Hey I’ve already done a step by step tutorial as part of my paid course. It’s not something I can upload online, but you might be able to find similar tutorials on UA-cam by combining a few tutorials. Try searching for line animation or similar

[@joshdiditt]

@@FlatPackFX Ok. Thank you!

[@avanzahid6195]

Thanks so much😍😍

[@altamirorosa6879]

Nice. Really nice!

[@allexsendro9560]

😍 love your videos i have learned so much from you

[@FlatPackFX]

That’s so good! Makes me happy to hear that.

[@gerrolaurioabarabar6758]

I love your videos, keep up!

[@FlatPackFX]

Thank you

[@moisesarrais6364]

Ball show friend, just lacked the translation?

[@ВладиславКовальчук-ъ8у]

слишком много твоего лица в видео-уроке.