[Chortorn]

[Alan Lorence] “I don’t think you can do it automatically. “Align to motion” is for particles — aligns them to the direction they are moving (not the direction the emitter is moving). It might work to check the “attached to emitter” option and move the slider to the far left, but it might not work and even if it does it may not be exactly what you want.

I think you’ll have to manually keyframe the emission angle (with a low emission range) to get the results you want.”

>>

Yes, that was what I concluded too. I tried to export the emitter’s position data and manipulate them in AE by this expression in rotation:

radiansToDegrees(Math.atan2(this.position[1] – this.position.valueAtTime(time – 0.03)[1], this.position[0] – this.position.valueAtTime(time – 0.03)[0]))

It makes the object point it’s nose forward all the time. Then I converted the expression into keyframes and copied it. However, Particle Illusion does not allow import of anything but position data, which means – as you have said – it has to be done manually.

[Chortorn]

Why do you want to use PI? I would use After Effects and use a mask with some feather (3-5 pixels) over a picture of the clawmarks with an alpha. The mask should reveal them during 1-3 frames.

I suppose you want the marks on the screen – or do you want it to be like sword tracing lines in combat games?

Chortorn

[Chortorn]

I have solved it with a workaround – animationspeed changes and stops. However the animation has to be made precisely for this method.

Should I upload the file?

Chortorn

[Chortorn]

I was tired when I wrote it. I meant with particles. Is it possible to make an animated particle stop at the last frame? I.e. flowers growing, branches growing, etc.

Chortorn

[Chortorn]

Yes, I want it to be made with Time Remap – in the end I would not do it with colors. I will replace the sequence in the time remapped comp with whatever: A morph between two pictures, a jpeg-sequence or something else.

It saves me from making one mask per frame, which would be likely to kill my computer and require a lot of work.

[Chortorn]

If the links fails, try this:

http://www.cybinart.com/misc/TwoWMVfiles.zip

chortorn

[Chortorn]

Thanks for the answers. It is not what I want though. I am not looking for the effect of Time Displacement itself – or Time Remapping – but perhabs a combination thereof or something completely different.
My array of words in english (I am from Denmark) seems to be insufficient to explain what I want to do – therefore I have illustrated it at:

http://www.cybinart.com/misc/desiredResult.wmv
http://www.cybinart.com/misc/source.wmv

The way I have reached the desired result is fake – and it will only work for this example.
If the result was created from a Time Remapped layer, containing a red solid with a Hue/Saturation (frame 0 – Hue = 0; frame 25 – Hue = 350), then I would be happy.

Chortorn