[Nicolas Guionnet]

Right !

4 fps :

2 fps :

… and there we see, finally, the particle moving in its quantum wave. Nice.

I would be surprised if it was the math accuracy considering the number of digits delivered by AE when I display a value in a Text Layer.
But these days, I am surprised 10 times a day …

Now i try to evaluate the [ output as frames, and import as footage into a new comp ] process in term of feasibility.

Tweaking the code could be another option …

Thanks

[Nicolas Guionnet]

Great,

In my code, there was an inversion between the 2 parameters. The valid code is below where …
– T is the time passing and causing the animation and
– s is the parameter that draws the curve.

The result is very promising.

One thing though :

I couldn’t increase the number of dots.

Increasing the number of particles did nothing but superpose the old ones with new ones … It is as if there was a limitation in time definition.
Is it the case ? … I wonder if it can be changed.

Thanks a lot … This is going to be useful.

fps = 1/thisComp.frameDuration;
cur_frame = time*fps;

T = Math.floor(fps*time)/fps/100;
s = cur_frame%1*10;

x= 100*Math.exp(-(s-5)*(s-5)*T)*Math.cos(20.01*s+T*450);
y = 100*Math.exp(-(s-5)*(s-5)*T)*Math.sin(20.01*s+T*450);
z = 50*s-150;
[x,y,z]

[Nicolas Guionnet]

… time to go to bed before this thing drives me crazy … I tried every option that could be connected with the problem, mainly in the Emitter group.
I get a tiny segment turning around …

[Nicolas Guionnet]

… strange, I don’t get the whole curve. In fact, just a tiny piece of it.

I created a solid and applied Particular to it.
Particule life : thisComp.frameDuration
Part/sec : 30 000
Velocity and associated parameters : 0
Emitter size: 1
Emitter type : lights

I created a point light named Emitter.
I put you code in its Transform.position

I keep on searching … I guess 4 hours is not enough to master Particular …

13255_quantum3dwithparticularkalleheikki.aep.zip

[Nicolas Guionnet]

Great ! Great ! !

It’s such a relief for me to see it is finally possible.
You did it with particular, didn’t you ?

I went to bed yesterday, really late, deducing from my failureS that it was not possible, which is really vain, for after 3 hours of work on a piece of software like Particular, you can’t deduce much of its real possibilities.

Now, I am on my way to (try to) reproduce your success …

Thank you so much Kalleheikki …

[Nicolas Guionnet]

… and I forgot to say that lambda is the parameter to be animated.

[Nicolas Guionnet]

I think I am going to try Particular, in the way you described up there. As you said, Stardust has no real documentation …

An example formula ? A nice one :

x(t) = 100.exp ( – (t-5)² . lambda ) . cos (10*t)
y(t) = 100.exp ( – (t-5)² . lambda ) . sin (10*t)
z(t) = 20t

0 < t < 10
0 < lambda < 30

[Nicolas Guionnet]

(Not being able to) Animate a 3D curve with TAO

I finally installed Trapcode trial and tried to use TAO to animate a 3d curve.

I used a light to draw my 3D-curve. In fact, it is a series of 3D Curves concatenated (tricky) … that would be used for the animation.

I just needed to find a way to tell TAO to :
Draw only a part of the curve, the one for :
lambda < time < lambda + myComp.frame.duration
(… and then animate lambda.)

It seems there is no way in TAO . I could try to implement a kind of non-robust hacky floppy tricky workaround using … size offset to reveal only the wanted part of my curve and animate it. But … no

Let’s try Stardust

[Nicolas Guionnet]

> “You have to draw the entire shape in one frame”

Well, I don’t really get it.

I could do it with a 2D shape (drawn in a layer with some simple expressions with a loop on createPath and depending on time). But I need a 3D curve …

And everywhere I saw a 3D curve defined with a mathematical function it was this way : x(time), y(time), z(time) with time as variable … and to animate it I would need this :

x( time , lamdda ) , y( time , lamdda ) , z( time , lamdda )
… where lamda is a parameter changing the curve …

BUT … to animate the curve I need to change lamdda : labda = lamdda(time) … and I don’t think it is possible to tell Trapcode or Stardust : “draw the curve acting as if lamdda was a constant.” … and animate lamda “under the table” hidden from Trapcode or Stardust ….

I begin to think that the only way to do this is outside of AE : Blender Script and then import the OBJ … but what a pain in the … hips … to animate it and synchronize it with the audio …

[Nicolas Guionnet]

Thanks Kalleheikki,

I first thought : That’s it ! … then came another question :
How can you animate the path then ? … as the time variable already defines the path … and the problem is the same in Trapcode and Stardust …