pscale : is there any way to filtering the negative values?

[cloudfx]

Hi all,

I have an expression

.5 - (($LIFE)* 0.6)  * 4

in pointsop:particle scale value

to reduce particle's size to be smaller by its$LIFE.

when it gets to negative values, particle starts grow up again later..

Is there any way to filter the negative values and remove them or make it dead when the particle scale gets value of 0.0 in pop or sop..?

Here is the hip file. ver9.1

copySopQuestion_houdini9.1.004.hipnc

Thanks,

[edward]

I don't have time to look at the .hip file but use a Kill POP using the following rule?

.5 - (($LIFE)* 0.6)  * 4 < 0

[symek]

Hi all,

I have an expression

.5 - (($LIFE)* 0.6)  * 4

in pointsop:particle scale value

to reduce particle's size to be smaller by its$LIFE.

when it gets to negative values, particle starts grow up again later..

Is there any way to filter the negative values and remove them or make it dead when the particle scale gets value of 0.0 in pop or sop..?

Here is the hip file. ver9.1

Thanks,

Just to add what Edward said, you could possibly reorganize your expression to keep under control:

Even

0.5 * (1-$LIFE)

should work unless you don't expect more from that.

Secondly, one great thing for particles in general are CHOPS. Here you can *see all attributes changing in time and tweak it as you like. Very powerful. You can import point attributes to CHOPs and post-process them like you would do with pictures in compositing.

See attachment for not terrible interesting example.

Cheers,

sy.

chops_pops.hipnc