Stalight Starbright

particles
#1

In this topic @Wingnut asked

But… WHAT IF… ANY mesh shape can be an emitter

Here is a step to step approach to trying to answer that question.

  1. Create a complex mesh shape Babylon.js Playground

  2. Add a function that calculates interior points of the mesh and then fill it with spheres for example, https://www.babylonjs-playground.com/#2K3T61#1

  3. Make the spheres with SPS, add color and wobble them about a bit https://www.babylonjs-playground.com/#2K3T61#2

  4. Return to the original question and emit particles based on the mesh shape https://www.babylonjs-playground.com/#2K3T61#4. BEWARE there is something wrong in my code. To rerun you MUST refresh the BROWSER. Clicking on RUN seems to add particles and so points[particle.id] tries to find an entry in the array larger than the number in the array. Perhaps someone can find my error!

EDIT
4 PG corrected https://www.babylonjs-playground.com/#2K3T61#7.

#2

Woot! This is really cool! I love it

#3

Wondering if this should be mentioned in the doc actually

#4

It is my intention to add the createInnerPoints function to the utilities sub-section of the snippets section probably just with the first PG. Any insight into the not being able to use the RUN would be welcomed.

#5

This is probably because you cannot reuse particle.id as the value will keep incrementing (It is not the particle index in the array unfortunately but a unique number: Babylon.js/babylon.particle.ts at master · BabylonJS/Babylon.js · GitHub)

#6

Note to self - stop making assumptions :woozy_face:

#7

that is so nice

#8

Hey @Dad72… here I needed the “agree” button, so I could agree with Naz. So, thats:

Like (old forum)
Thanks (old)
Laugh (old)
Confused (old)
Sad (old) (rarely used)
Agree (new button)

That’s a lot of data to store. :slight_smile:

But yeah, johnK… fabulous demos, THANK YOU! That’s VERY kind of you to remember, and follow-up-on one of my future-hopes. Well done! (hug) You have opened some very large and pretty doors.