Highend3d Artists Discussion Forums

How Can I Get The Currently Selected Objects And Print Them?

Tags: #<Tag:0x00000006799518>

pythonboy 2007-12-21 07:48:10 UTC #1

Hey guys i am total noob to the api stuff.

How can i get the currently selected objects and print them?

I created a plugin command that prints hello in maya.

Now i want to make it print out the selected objects in maya.

I found the MSelectionList class in the API reference but i don't know how to use it.

Please help me start my way

thank you

pythonboy 2007-12-21 11:56:06 UTC #2

So i don't create another thread here are the problems I faced today learning maya API in c++ :

Code :

    MString BevelNode;	
MGlobal::executeCommand(BevelNode ="polyBevel");
MGlobal::displayInfo(Bevel);

I want to capture the result node polyBevel1 into a variable.Like this the variable BevelNode is just set to polyBevel,but not
the result of the command.How to do that?

More coming

Thank you

pythonboy 2007-12-21 12:13:02 UTC #3

How to make interfaces in maya with commands or whatever written in c++ ?

Will i have to write the interfaces in mel just with the MGlobal::executeCommand() ?

thanks

joojaa 2007-12-21 12:28:09 UTC #4

QUOTE(pythonBoy @ 12/21/07, 02:13 PM) [snapback]278548[/snapback]
Will i have to write the interfaces in mel just with the MGlobal::executeCommand() ?

Yes, windowed guii is not within the scope of the api. Thats what mel is for.

pythonboy 2007-12-21 15:03:30 UTC #5

Someone knows the first two ?

For the first :

I create a MSelectionList called selection and then with MGlobal::getActiveList(selection ) ... but what next,how to print the selected objects in maya?

And the second :

Basically i bevel a polygon and i want to get the return value of that ... in my case for example polyBevel1

thanks

f117f117f117677 2007-12-23 02:55:42 UTC #6

i wrote the Api to print the selected objects' name in maya's output window ,
print others in the same way , wish help you.

// Copyright © wxt
//
// File: selCmd.cpp
//
// MEL Command: sel
//
// Author: Maya Plug-in Wizard 2.0
//

// Includes everything needed to register a simple MEL command with Maya.
//
#include
#include
#include
#include
#include
#include

// Use helper macro to register a command with Maya. It creates and
// registers a command that does not support undo or redo. The
// created class derives off of MPxCommand.
//
DeclareSimpleCommand( sel, "wxt", "8.0");

MStatus sel::doIt( const MArgList& args )
//
// Description:
// implements the MEL sel command.
//
// Arguments:
// args - the argument list that was passes to the command from MEL
//
// Return Value:
// MS::kSuccess - command succeeded
// MS::kFailure - command failed (returning this value will cause the
// MEL script that is being run to terminate unless the
// error is caught using a "catch" statement.
//
{
MStatus stat = MS::kSuccess;

// Since this class is derived off of MPxCommand, you can use the 
// inherited methods to return values and set error messages
//
MSelectionList selection;
MGlobal::getActiveSelectionList( selection );

MDagPath	dagPath;
MFnDagNode	dagNode;

MItSelectionList iter( selection );
for ( ; !iter.isDone( ); iter.next( ) )
{
	iter.getDagPath( dagPath );
	dagNode.setObject( dagPath );
	cout<<dagNode.name( )<<endl;
}



setResult( "sel command executed!\n" );

return stat;

}

pythonboy 2007-12-24 20:06:55 UTC #7

Hello

for ( ; !iter.isDone( ); iter.next( ) )

Why is there nothing in the first part of the for statement,what that means? there is just ;

Thanks

f117f117f117677 2007-12-25 00:27:54 UTC #8

i think this is maya APi's rule, no reason why!

maybe you can get the reason in the docs about MItseletionList

joojaa 2007-12-25 14:33:16 UTC #9

its how c defines a for loop as a line with 3 components

for (initialization; check; incremetor)

now because the iter is a object and its initialized elsewhere

pythonboy 2007-12-25 18:53:23 UTC #10

Thanks guys

Here is another problem i have during today's api learning :

so i don't start another thread ...

bool isUndoable() const {return true;}

why this results in error :

C2084: function 'bool myCmd::isUndoable(void) const' already has a body

and when it is just like this it has no errors :

bool isUndoable() const ;

But i want to make it undoable.

Thanks

f117f117f117677 2007-12-26 00:50:43 UTC #11

you can try this:

virtual bool is Undoable() const { return false; }

pythonboy 2007-12-26 09:52:59 UTC #12

I get the same error

Anyways here is where that code is :

class myCmd : public MPxCommand
{

public:
myCmd();
virtual ~myCmd();

MStatus		doIt( const MArgList& );
MStatus		redoIt();
MStatus		undoIt();
bool isUndoable() const { return false; }

static		void* creator();
static MSyntax newSyntax();

private:
// Store the data you will need to undo the command here
//
MDGModifier dgMod;

};

pythonboy 2007-12-27 10:59:37 UTC #13

The solution to this was simple but i did not see it at the time.

in the

class myCmd : public MPxCommand

part,you just say :

bool isUndoable() const;

and then in the main .cpp file you say :

bool myCmd::isUndoable() const
{
return true;
}

Anyways so i don't start a new thread here is a new problem:

I installed visual assist and in the projects created by maya wizard in visual studio i have acess to everything when i say:

#include

but when i open a project from the project files from David Gould's book it does not show all.See these two images.The second is what i get in david gould projects.Because of that i get errors when i compile and it says stuff like :