hou.hmath.rand() doesn't work with object seed

[Yorkst]

This works as a code for a python geometry operator:

node = hou.pwd()
print hou.hmath.rand(42.3);

 

This fails:

node = hou.pwd()
print hou.hmath.rand(node);

It prints TypeError: in hmath_rand argument 2 of type double

 

Is there a python RNG, which accepts houdini objects like seed?

[f1480187]

Python built-ins id(object) and hash(object). All inconsistent between Python (and Houdini) sessions. There is also hashlib module. Maybe Python or hom have something even better. I'm not into scripting a lot. There is hou.Node.sessionId() for Node's instances, but it works in similar way as aforenamed functions.

[Yorkst]

So, is Python limited in comparison to HScript?

[f1480187]

Is there any HScript/HScript Expression doing a better job? One I can find is similar to what hou.Node.sessionId() does. What's your situation, more precisely? Talking about limited-unlimited, there is bunch of this-still-not-implemented HScript equivalents I personally missed in HOM. Actually, found that they available, because I've never used "non-expression" HScript. You can invoke both from each other. hou.hscript() and bunch of other functions exists.

 

 

 

[dedeks3000]

May be you can use the uuid module to generate unique identifier and store the result on the node instance in a parameter or with userData ?

Edited October 25, 2015 by dedeks3000

[Yorkst]

I was absolutely sure that HScript rand works with non float seed. It turns out, that it doesn't.

 

Then it's just a matter of writing custom hash functions.

 

Sorry for confusion.