我正在尝试使用 C++ API 编写一个 Maya 插件,该插件将识别选择中的网格,(计算一些东西),删除它们,然后在场景中插入一个新的网格。
我通过与objExporter插件示例相同的方式收集选定的网格。我正在使用 aMDagModifier
删除网格节点并尝试撤消这些更改。但undoIt
它不起作用......
这是我的简化代码:
#include <maya/MArgList.h>
#include <maya/MObject.h>
#include <maya/MGlobal.h>
#include <maya/MPxCommand.h>
#include <maya/MDagModifier.h>
class LibiglBoolean : public MPxCommand
{
private:
MDagModifier dgModifier;
public:
LibiglBoolean() {};
virtual MStatus doIt(const MArgList& argList);
virtual MStatus redoIt();
virtual MStatus undoIt();
virtual bool isUndoable() const;
static void* creator();
};
和
#include "LibiglBoolean.h"
#include <maya/MDagPath.h>
#include <maya/MFnDagNode.h>
#include <maya/MFnPlugin.h>
#include <maya/MItDag.h>
#include <maya/MItSelectionList.h>
#include <maya/MSelectionList.h>
void* LibiglBoolean::creator() { return new LibiglBoolean; }
MStatus LibiglBoolean::doIt(const MArgList& /*argList*/)
{
return redoIt();
}
MStatus LibiglBoolean::redoIt()
{
MSelectionList slist;
MGlobal::getActiveSelectionList(slist);
MItSelectionList iter(slist);
for(MItDag dagIterator(MItDag::kDepthFirst, MFn::kInvalid);
!iter.isDone();
iter.next())
{
MDagPath objectPath;
iter.getDagPath( objectPath );
dagIterator.reset(objectPath.node());
// DAG iteration beginning at at selected node
for ( ; !dagIterator.isDone(); dagIterator.next() )
{
MDagPath dagPath;
dagIterator.getPath(dagPath);
// skip over intermediate objects
MFnDagNode dagNode(dagPath);
if(dagNode.isIntermediateObject())
{
continue;
}else if((dagPath.hasFn(MFn::kMesh)) && (dagPath.hasFn(MFn::kTransform)))
{
continue;
}else if( dagPath.hasFn(MFn::kMesh))
{
dgModifier.deleteNode(dagPath.node());
}
}
}
dgModifier.doIt();
return MS::kSuccess;
}
MStatus LibiglBoolean::undoIt()
{
return dgModifier.undoIt();
}
bool LibiglBoolean::isUndoable() const
{
return true;
}
MStatus initializePlugin(MObject obj)
{
MFnPlugin plugin(obj, "Name", "1.0", "Any");
return plugin.registerCommand("LibiglBoolean", LibiglBoolean::creator);
}
MStatus uninitializePlugin(MObject obj)
{
MFnPlugin plugin(obj);
return plugin.deregisterCommand("LibiglBoolean");
}
(我想坚持使用 C++ API 并避免使用 MEL/Python 接口)。
如何deleteNode
正确撤消操作?