voxel expression

[sonppw]

is there represent voxel expression like $PT ??(in field)

that is mean like each point have different value by using $PT

so i want to give to  different value at each voxel by using expression

i can't looking for voxel expression in Help document

 

sorry question is very simple

Edited May 1, 2014 by sonppw

[wick3dParticle]

Hi Sonppw,

 

To my knowledge there is no voxel expression. With that being said, you can generate a volume from attributes. Look at the Volume From Attrib sop node.

 

~Ilan

[anim]

Volume Wrangle in SOPs
Gas Field Wrangle in DOPs

then you can do whatever you want so either use @P to vary each voxel like

@density = rint(random(@P*1000));

or

@density = noise(@P*10);

or you can compute voxel id by @ix+@resx*@iz+@resx*@resz*@iy;
and use it for whatever like

int vxlid = @ix+@resx*@iz+@resx*@resz*@iy;
@density = random(vxlid);

all of this can be done with VOP nodes if you use Volume VOP or Gas Field VOP, it's just a matter of preference

Edited May 1, 2014 by anim

[wick3dParticle]

Good Call Tomas!

 

~Ilan

[sonppw]

thanks everybody !