Masayuki Akamatsu

jit.p.bounds (mode 0) seems to be incompatible with 8-planes matrix.

in jit.p.bounds.help, particles do not bounce in mode 0.

jit.p.bounds (mode 0) seems to be incompatible with  8-planes matrix.

For example,when I change
     jit.matrix brahma 5 float32 1000 2
to
     jit.matrix brahma 8 float32 1000 2
in jit.p.bounds.help, particles do not bounce in mode 0.

jit-p-bounds-with-8-planes-matrix

This is a conflict between jit.p.bounds and jit.vishnu. When a 

particle matrix has planes 5, 6 and 7, vishnu interprets these planes 

as velocity and calculates a new position for the particle based on 

this. bounds, when it bounces a particle, is changing the position by 

an amount approximately equal to (-velocity). So, the particle stops 

moving along one of its axes. A cleverer implementation of bounds 

would take the 8-plane case into account as well, instead of applying 

the bounce behavior to every plane after plane 1. I'll add it to the 

Am 07.12.2006 um 10:43 schrieb Masayuki Akamatsu:

> jit.p.bounds (mode 0) seems to be incompatible with 8-planes matrix.

> in jit.p.bounds.help, particles do not bounce in mode 0.

This is a conflict between jit.p.bounds and jit.vishnu. When a  
particle matrix has planes 5, 6 and 7, vishnu interprets these planes  
as velocity and calculates a new position for the particle based on  
this. bounds, when it bounces a particle, is changing the position by  
an amount approximately equal to (-velocity). So, the particle stops  
moving along one of its axes. A cleverer implementation of bounds  
would take the 8-plane case into account as well, instead of applying  
the bounce behavior to every plane after plane 1. I'll add it to the  
list for future updates.

> Hi,
>
> jit.p.bounds (mode 0) seems to be incompatible with  8-planes matrix.
>
> For example,when I change
>     jit.matrix brahma 5 float32 1000 2
> to
>     jit.matrix brahma 8 float32 1000 2
> in jit.p.bounds.help, particles do not bounce in mode 0.
>
> mode 1, 2 and 3 works fine.
>
> Should I set any other parameters ?
>
> Thank you.
> Masayuki Akamatsu
>


Sorry for the dumb question, but I didn't understand your solution... could you explain in other words?

The part when you say "A cleverer implementation..."

When I'm using a 8 plane matrix I get the same problem, the particles doesn't bounce back in the boundaries of jit.p.bounds, and apart from that I want to invert the direction of the particles that collides with another object in the field. I tried a lot of things to invert manually the direction the particles but I had no success.

Sorry for the dumb question, but I didn't understand your solution... could you explain in other words?
The part when you say "A cleverer implementation..."
When I'm using a 8 plane matrix I get the same problem, the particles doesn't bounce back in the boundaries of jit.p.bounds, and apart from that I want to invert the direction of the particles that collides with another object in the field. I tried a lot of things to invert manually the direction the particles but I had no success.
Does anyone have a solution? Thanks!

Oops! Now I understand what do you mean! :P Sorry my clumsy english!

But I see that this post has 3 years old and unfortunately the update wasn't made yet... :(

Is there a way to solve this problem with jitter objects?

Oops! Now I understand what do you mean! :P Sorry my clumsy english!
But I see that this post has 3 years old and unfortunately the update wasn't made yet... :(
Is there a way to solve this problem with jitter objects?
Thanks!

jit.p.bounds with 8-planes matrix