Cop Generator/filter Questions

[hoknamahn]

I'm looking for examples of COP generator/filter. And one question: how to get access to an array of pixels?

[hoknamahn]

The second attempt: somebody can say, how to write/read to/from image planes?

I want to rewrite my VEX type Material COP filter with HDK.

http://www.cgtalk.ru/~hoknamahn/portfolio/...COP0.9aDemo.avi

Probably somebody has this file? toolkit/html/cop/index.html

Any help is appreciated.

[AndrewVK]

Hey Hok u have this one:

SOP_CopRaster

[hoknamahn]

Yes, I'll check this later.

Thanks, Andrew.

[hoknamahn]

I have one question. When I try to compile my custom cop, I receive the message

COP2_Material.c: In static member function `static OP_Node*

[Mario Marengo]

I'm not sure what does it mean.

Hey Hok,

Don't know the specifics of this case, but what the compiler is trying to tell you is that COP2_Material is an abstract class (has one or more pure virtual members) and therefore cannot be instantiated. I'm guessing that COP2_Material is your own custom class which derives from COP2_Node... but COP2_Node is abstract! (specifically, the method cookSequenceInfo(OP_ERROR&) is not implemented).

So, unless you know how to go about implementing the cookSequenceInfo(OP_ERROR&) method, I'd suggest deriving from something further down the hierarchy -- a quick scan of the hierarchy seems to suggest that any class below (and including) COP2_MultiBase, COP2_PixelBase, and COP2_TimingBase should be OK... though I'd probably go with one of the main leaf classes: COP2_Generator or COP2_PixelOp.

But I haven't written any cop stuff so I could be all wrong about this...