[ANSWERED] Footprints following a performer randomly walking on a stage

[bonemap]

@mark_m said:

you must have done this sort of thing...

 Hi,

I do have something that I think will get you started... it is using the same principles suggested by @DusX, but packaged up in a demonstration patch. 

blob-particle-follow.zip

Best Wishes

Russell

[mark_m]

@bonemap @DusX

Great, thank you so much! Those are the very things! I'm so grateful!

Cheers

Mark

[DusX]

@mark_m

I think you will also what to use Pythagoras to calculate the distance between your 2 reference points, so that you don't update the rotation unless the distance is greater than a set threshold.
Bonemaps example is great, but if you stop moving the mouse you get some unwanted rotation changes with any small point updates.

[bonemap]

@dusx

Hi,

The javascript solution does efficiently resolve the issue of what happens when the movement stops. I have so much to learn - Thanks for sharing it! 

@mark_m here is a screengrab how I was able to integrate @DusX javascript. Apologies done with a beta version so I can't share the patch file.

Best Wishes

Russell

[mark_m]

@bonemap

Thanks a lot! Will try that..

Meanwhile, demonstrating that you can do anything many ways in Isadora... we used your (@bonemap's) original patch, and connected the 2D velocity actor to the blob tracker's X and Y output, and connected that to the pulse generator of the 3D Particle Generator. So that if the velocity was zero, no footsteps (particles) were emitted, and the faster you ran, the more footsteps got laid down.

We also used the technique that you shared with us a while ago in your excellent tutorial on sprite animation to make left and right footprints!

Here's a screen grab of this scene (the blob tracking itself is done in a secondary scene: the listeners get the x / y positions:

And the video of our first, crude attempts: a quick demo to the director to show we were on the right track (no pun intended!).

We'll get back to that and give it a go with the Javascript as well.

Thanks Russell and Ryan, you're both marvellous!

[DusX]

@bonemap said:

<p>@dusx</p><p>Hi,</p><p>The javascript solution does efficiently resolve the issue of what happens when the movement stops. I have so much to learn - Thanks for sharing it! </p><p>@mark_m here is a screengrab how I was able to integrate @DusX javascript. Apologies done with a beta version so I can't share the patch file.</p><img src="/assets/uploads/files/1634079469460-screen-shot-2021-10-13-at-8.50.35-am.png" /><p>Best Wishes</p><p>Russell</p>

 Nice approach!

[Woland]

@bonemap said:

Apologies done with a beta version so I can't share the patch file

 Now that 3.1 is released, I'm itching to get my hands on this file 

[bonemap]

@woland

Here it is! follow-particle.zip

Best Wishes

Russell

[Woland]

@bonemap

Awesome! Do you mind if we make some tweaks and add some Comment actors then upload it and credit you, or do you want to upload it yourself?

[bonemap]

@woland

The Javascript is from @DusX so I would say the credit goes there for this one.

Best Wishes

Russell