public override void copy(MPxData src)
{
blindDoubleData srcdata = src as blindDoubleData;
if (srcdata != null)
{
fValue = srcdata.fValue;
}
}
public override void redoIt()
{
MObject dependNode = new MObject();
MOStream stdoutstream = MStreamUtils.stdOutStream();
for (; !iter.isDone; iter.next())
{
// Get the selected dependency node and create
// a function set for it
//
try
{
iter.getDependNode(dependNode);
}
catch (System.Exception)
{
MStreamUtils.writeCharBuffer(MStreamUtils.stdErrorStream(), "Error getting the dependency node");
continue;
}
MFnDependencyNode fnDN;
try
{
fnDN = new MFnDependencyNode(dependNode);
}
catch (System.Exception)
{
MStreamUtils.writeCharBuffer(MStreamUtils.stdErrorStream(), "Error creating MFnDependencyNode");
continue;
}
MFnTypedAttribute fnAttr = new MFnTypedAttribute();
MObject newAttr = fnAttr.create("blindDoubleData", "BDD", blindDoubleData.tid);
try
{
fnDN.addAttribute(newAttr, MFnDependencyNode.MAttrClass.kLocalDynamicAttr);
}
catch (System.Exception)
{
// do nothing
// addAttribute only need call once, the redundant calls will return false (throw exception)
}
// Create a plug to set and retrieve value off the node.
//
MPlug plug = new MPlug(dependNode, newAttr);
// ----------------------------------- Attention ------------------------------------
// --------------------------------- Downcast Begin -----------------------------------
// the following codes are used to get the c# object
//
MFnPluginData pdFnCreator = new MFnPluginData();
// 1. you cannot gain blindDoubleData by the following code
// {code}
// blindDoubleData newData = new blindDoubleData()
// {code}
// As we need to keep the relationship between c# impl and c++ instance pointer
// We cannot use the above ctor codes, otherwise, the mandatory information used for down casting is omitted
// 2. you cannot use the tempData gained by the following code
// {code}
// MObject tempData = pdFnCreator.create(blindDoubleData.tid);
// {code}
// reason:
// tempData is useless, we cannot use tempData to do downcast
// the create function gains the tempData by the following code
//
// {code}
// newHandle = new MObject(mayaHandle);
// {code}
//
// the mayaHandle is the actual pointer, which we store. But we have no information about the newHandle
// the return object is useless. the data we needed is stored in pdFnCreator
pdFnCreator.create(blindDoubleData.tid);
// 3. get "the data" we needed
blindDoubleData newData = pdFnCreator.data() as blindDoubleData;
// ---------------------------------- Downcast End -----------------------------------
if (newData == null)
{
continue;
}
newData.value = 3.2;
plug.setValue(newData);
// Now try to retrieve the value of the plug as an MObject.
//
MObject sData = new MObject();
try
{
plug.getValue(sData);
}
catch (System.Exception)
{
continue;
}
// Convert the data back to MPxData.
//
MFnPluginData pdFn = new MFnPluginData(sData);
blindDoubleData data = pdFn.data() as blindDoubleData;
// Get the value.
//
if (null == data)
{
// error
MStreamUtils.writeCharBuffer(MStreamUtils.stdErrorStream(), "error: failed to retrieve data.");
}
MStreamUtils.writeLine(stdoutstream);
MStreamUtils.writeCharBuffer(stdoutstream, ">>>>>>>>>>>>>>>>>>>>>>>> blindDoubleData binary >>>>>>>>>>>>>>>>>>>>");
MStreamUtils.writeLine(stdoutstream);
data.writeBinary(stdoutstream);
MStreamUtils.writeLine(stdoutstream);
MStreamUtils.writeCharBuffer(stdoutstream, ">>>>>>>>>>>>>>>>>>>>>>>> blindDoubleData ascii >>>>>>>>>>>>>>>>>>>>");
MStreamUtils.writeLine(stdoutstream);
data.writeASCII(stdoutstream);
}
return;
}