have you tried... siOnCreateShader? i generated this event from the wizard
and it seems to log a lot of relevant info. also there is siOnConnectShader
" *Question*: Can material assignment happen without this command being
run? In other words, is catching this command sufficient for monitoring
all the ways that a material can be assigned to an object? I'm not very
experienced with using Softimage, but I know that in Maya there are a
million and one ways to assign materials. "
-one could change the shader graph but not the material assignment.
-one could 'drag and drop' a material from the material view in the
explorer on to an object. that calls 'CopyPaste()' command. i have always
been on the fence whether that command is good or bad)
On Fri, May 4, 2012 at 4:39 PM, Nicolas Burtnyk <nico...@redshift3d.com>wrote:
> Hi list people!
>
> For my custom renderer, I'm trying to keep track of when materials get
> assigned to objects.
> This is part of an overall system which tracks changes to the scene so
> that I can incrementally process only the parts of the scene that change
> between renders.
>
> Since there is no specific event that gets fired when a material is
> assigned to an object (that I know of - please correct me if I'm wrong!),
> I'm trying to use *siOnEndCommand *to catch the *AssignMaterial *command.
> *By the way Softimage devs: please add a OnMaterialAssigned event :)*
>
> I have 1 question and 1 issue:
>
> *Question*: Can material assignment happen without this command being
> run? In other words, is catching this command sufficient for monitoring
> all the ways that a material can be assigned to an object? I'm not very
> experienced with using Softimage, but I know that in Maya there are a
> million and one ways to assign materials.
>
> *Issue*: While I'm correctly receiving the ApplyMaterial command in the
> siOnEndCommand callback, I'm having trouble deciphering the command
> arguments.
> Basically I want to know the Material that was assigned and the Object(s)
> it was assigned to. Simple, right?
> In the siOnEndCommand callback, I get the "Command" attribute from the
> context and create a Command object from it. I then retreive the arguments
> using Command::GetArguments(). The ArgumentArray always has a count of 2
> (whether I assign the material to 1 or more objects).
> The second argument (ActionWhenLocalMaterialsOverlap) is irrelevant to me.
> The first argument is a CValueArray that has a CRef for the Material being
> assigned as its first element and some mysterious CRef as its second item.
> *My issue is that I don't know what to do with this strange CRef*.
>
> Here is a concrete example:
>
> I have 2 objects and 1 material in my scene and assign the material to
> both objects in a single action:
> Application.AssignMaterial("Sources.Materials.DefaultLib.Material,sphere,cylinder",
> "siLetLocalMaterialsOverlap")
>
> In the siOnEndCommand callback I get:
>
> Command(Context(in_ctxt).GetAttribute(L"Command")).GetArguments()[0].GetValue()returns
> a CValueArray with 2 items.
>
> Item 0 : CValue, m_t=siRef - this is a CRef to the Material being
> assigned, as expected. GetAsText() return
> "Sources.Materials.DefaultLib.Material" and GetClassIDName() returns
> "Material". Good to go.
>
> Item 1 : CValue, m_t=siRef - this is some kind of weird CRef that I don't
> know how to handle. GetAsText() returns "sphere,cylinder" and
> GetClassIDName() returns "Object". What do I do now? How can I get those
> objects as CRefs? Do I have to tokenize the string and parse out the
> object names? It's not hard, but I'd like to do something cleaner if
> possible.
>
> Thanks!!
>
> -Nicolas
>
