Page 1 of 1
Script command returning a value
Posted: 11 Oct 2012, 13:13
by stan
Something I've been trying to do that illudes me.
The only example there is that's even close is exampledataobject.cpp and Clinton's dataobjects. I want to return a value to a command not a dataobject. I assume it's done on the RiExamplesPlugin.cpp. I'm trying to pass a float. See my image
Code: Select all
STDMETHODIMP CRiExamplesPlugin::ParameterPassing(float *fFlt/*, BSTR *szStr*/)
{
//create hello world command
CComPtr<IRsCommand> spCmd;
HRESULT hr = CRpExamplesPlugin::CreateCommand(DEF_GUIDNAME_PTR(IRcParameterPassing), &spCmd);
if (FAILED(hr))
return hr;
CComVariant vFlt;
//pass input parameter using command node connector
CComQIPtr<IRsNode> spNode = spCmd;
spNode->GetValue(CON_PP_FLOAT_PARAM, &CComVariant(vFlt));
if (vFlt.ChangeType(VT_R4) != S_OK)
return E_INVALIDARG;
//spNode->SetValue(CON_PP_FLOAT_PARAM, CComVariant(*fFlt));
fFlt=vFlt.fltVal ;/
//execute it
return CRpExamplesPlugin::ExecuteCommand(spCmd);
//return spNode->SetValue(CON_PP_FLOAT_PARAM, CComVariant(vFlt));
};
Re: Script command returning a value
Posted: 11 Oct 2012, 21:32
by stan
well I finally got some results, I had my extern variable in the wrong place. There is still an issue as I have to click twice on my command to get the value I set, because my global variable needed to be initialized with a value, maybe I just have it in the wrong place too.
Re: Script command returning a value
Posted: 12 Oct 2012, 14:23
by stan
I'm still having issues with getting my value to show on the first click. Anyone have any ideas?
Code: Select all
STDMETHODIMP CRiExamplesPlugin::ParameterPassing(float *fFlt/*, BSTR *szStr*/)
{
*fFlt= myflt; //extern float myflt;
CComPtr<IRsCommand> spCmd;
HRESULT hr = CRpExamplesPlugin::CreateCommand(DEF_GUIDNAME_PTR(IRcParameterPassing), &spCmd);
if (FAILED(hr))
return hr;
//execute it
return CRpExamplesPlugin::ExecuteCommand(spCmd);
};
Re: Script command returning a value
Posted: 12 Oct 2012, 20:59
by trueBlue
Run the Command twice in your script?
Re: Script command returning a value
Posted: 12 Oct 2012, 21:24
by stan
I thought about that, but it would be better to know how it's done.
Maybe I need a second command created and executed that passes the variable to the command before the parameterpassing command executes.
Re: Script command returning a value
Posted: 12 Oct 2012, 21:52
by clintonman
Can you post more code?
Re: Script command returning a value
Posted: 12 Oct 2012, 23:38
by stan
Clinton, the command test is just a value(myflt=5.0f) to pass from itself to RiExamplesPlugin.cpp. I have extern float myflt; at the end of both .h files.
My global float myflt; is on the parameterpassng.cpp where my value originated but not in the function where my value is:
STDMETHODIMP CRcParameterPassing::Execute()
I don't seem to be able to use the connectors in the sample to pass the value either.
So my second bit of posted code goes with this.
Re: Script command returning a value
Posted: 13 Oct 2012, 19:32
by stan
Code: Select all
STDMETHODIMP CRiExamplesPlugin::ParameterPassing(float *fFlt/*, BSTR *szStr*/)
{
CComPtr<IRsCommand> spCmd, spCmd2;
HRESULT hr = CRpExamplesPlugin::CreateCommand(DEF_GUIDNAME_PTR(IRcParameterPassing2), &spCmd2);
if (FAILED(hr))
return hr;
CRpExamplesPlugin::ExecuteCommand(spCmd2);
*fFlt= myflt;//
hr = CRpExamplesPlugin::CreateCommand(DEF_GUIDNAME_PTR(IRcParameterPassing), &spCmd);
if (FAILED(hr))
return hr;
//execute it
return CRpExamplesPlugin::ExecuteCommand(spCmd);
};
This seems to work. Using a second command, first one creates the value(IRcParameterPassing2) and then it's there for the second one that uses it.
So my original IRcParameterPassing is only a dummy command, but I suppose it too could do stuff.
Re: Script command returning a value
Posted: 15 Jul 2016, 13:18
by stan
I found a good way of doing this while trying to figure out how to return an IRdNumArray:
On RiExamplesPlugin.cpp
Code: Select all
STDMETHODIMP CRiExamplesPlugin::ParameterPassing(float *fFlt)
{
HRESULT hr;
hr = CRpExamplesPlugin::CreateCommand(DEF_GUIDNAME_PTR(IRcParameterPassing), &spCmd);
if (FAILED(hr))
return hr;
CRpExamplesPlugin::ExecuteCommand(spCmd);
*fFlt = myflt;
//execute it
return S_OK;
}
On RiExamplesPlugin.h
Code: Select all
[id(2), helpstring("method ParameterPassing")] HRESULT ParameterPassing([out, retval]float *fFlt);
STDMETHOD(ParameterPassing)(float *fFlt);
//at end of file
extern float myflt;
On RcParameterPassing.cpp
Code: Select all
//global under includes
float myflt;
STDMETHODIMP CRcParameterPassing::Execute(void)
{
//this is just a random int to test code.
int a = rand()%10000;
myflt = (float)a;
return S_OK;
}