Fade volume near object

[vrman]

i want fade my volume when its near to other objects , anyone know how can i do this with volume vop or other solutions ?

thanks

[Juraj]

Hi,
in your volume VOP / volume wrangle you can compute distance to closest point in geometry and based on that multiply your density value.

You can use xyzdist() or nearpoint() functions.

 

[Shinjipierre]

another way is to create a volume from your object, blur it and substract it using a volume wrangle or volume mix, whatever is faster on computation time  (as xyzdist can get slow)

[vrman]

6 hours ago, Juraj said:

Hi,
in your volume VOP / volume wrangle you can compute distance to closest point in geometry and based on that multiply your density value.

You can use xyzdist() or nearpoint() functions.

 

Thanks , Could you please give me a hip file for volume vop example ?

Edited September 6, 2016 by vrman

[vrman]

6 hours ago, Shinjipierre said:

another way is to create a volume from your object, blur it and substract it using a volume wrangle or volume mix, whatever is faster on computation time  (as xyzdist can get slow)

thanx great idea , could you tell me how can i do this via VEX ? i  cant get volume density from input 1 or 2 with this code prim(1,"density",0).

another question , when i try to blur my volume , it will goes into my objects, is this possible to pushing out my volume ? something similar to what peak sop do ?

Edited September 6, 2016 by vrman

[Juraj]

Hi, sure, check attached file.

jt_density.hiplc

[vrman]

2 hours ago, Juraj said:

Hi, sure, check attached file.

jt_density.hiplc

thanks alot Juraj