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automatic 0 does not remove the origianl


Cheng Chien-Wen
July 3, 2010 | 7:04 am

I made a particle patch with jit.gl.multiple, but failed to get rid of the original shape by setting "automatic" to 0 for jit.gl.gridshape. I was wondering if there is some error in my patch. Please help.

Thank you so much.

Attachments:
  1. particle_basics_2.maxpat

Cheng Chien-Wen
July 4, 2010 | 2:22 am

I have another patch of particles (from Jitter reference) that does not uses jit.gl.multiple, and the matrix size is set to 1000 * 2. (See the attachement)

Does that mean that I will have to reduce the matrix size because I am using jit.gl.multiple ?

Thank you so much.

Attachments:
  1. particles_basic_2-1.maxpat

Cheng Chien-Wen
July 4, 2010 | 4:22 pm

Hi, Olives

Thanks for the patch. It looks better than the patch I posted.

But I still don’t quite understand what you mean by "if you are emitting 50 particles per cycle in a 1000 long matrix with a short life, hundreds are still zero and then you ask [jit.gl.multiple] to draw them !!!".

According to the help file of jit.p.shiva:
"Emit" decides the maximum particles emitted per frame.
The first dimension of the matrix represents the number of particles (per cycle ?).

I can’t figure out how these two parameters affect each other mathematically.
Could you explain more ?

Thanks.

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