Filename Parameter To A Sprite Shop, Possible ?

[chang]

I guess I can't assign a "string-typed" attribute to a pop.

What i want to do is assign different image (by frame number, or by rand(id)) to sprite shader.

so i wish i can pass file-name-parameter to sprite shader like this,

( filename a`padzero(3, $F)`.tga )

Is there any way that I can do this in pop?

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If that can't be an option, can i assign sprite shop on sop like i do point instancing with attributeCreate sop?

Thanks in advance

[edward]

Maybe you can modify your SHOP accordingly? Create a float attribute that indexes into an array of texture maps that gets used by your SHOP.

In theory, the Sprite POP only modifies attributes I think so it should be doable manually as well. Note that the Attribute POP is almost the same as the AttribCreate SOP.

[chang]

Maybe you can modify your SHOP accordingly?

Thanks Edward, i'll try that.

[MrBag]

Thanks Edward, i'll try that. 

17891[/snapback]

Just ran accross this same problem today. Peter Bowmar's tutorial is really good about explaining this exact problem. Basically it comes down to using the sprite procedural and exporting the attributes to the procedural, in this case "map_base" is the most likely attribute missing.

Here is a link to tutorial:

http://sidefx.vislab.usyd.edu.au/houdini_v...ects/index.html

Check out Sprite Stamping Part 1

Thanks,

Nathan