C / C++ / MFC

Re: how to compare one 3d vector with other 3d vector

16-Jun-09 9:06

Something like this?

struct Vec3D
{
   Vec3D(int x_, int y_, int z_) : x(x_), y(y_), z(z_) {}
   int x, y, z;
};

bool operator==(Vec3D const& left, Vec3D const& right)
{
   return left.x==right.x && left.y==right.y && left.z==right.z;
}

Then you can just do:

Vec3D v1, v2;
if (v1==v2) { /* they're the same!!! */ }

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

molesworth16-Jun-09 12:51

molesworth

16-Jun-09 12:51

Given the "accuracy" of floating point values, you might want an "abs(x1 - x2) < epsilon" test, rather than "==".

There are three kinds of people in the world - those who can count and those who can't...

Re: how to compare one 3d vector with other 3d vector

Stuart Dootson16-Jun-09 13:03

CString's GetBufer() and const

16-Jun-09 13:03

Waaaaay ahead of you - note the types I used for the vector co-ordinates Smile | :)

I'd rather tackle one problem at a time with the OP - comparison of structs/classes first, floating-point nastiness after that when he says 'but I'm using floating point numbers'.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

transoft16-Jun-09 2:45

transoft

16-Jun-09 2:45

Hi
The CString's GetBuffer() function can not be used with "const". Is there a workaround method to let it work?

Best regards,

David Crow16-Jun-09 2:48

David Crow

16-Jun-09 2:48

Are you referring to the LPCTSTR operator?

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transoft16-Jun-09 3:32

transoft

16-Jun-09 3:32

I am using it in a following function:

void Cmyclass::myfunction(ostream & outputStream) const
{
...
outputStream << static_cast <tchar *="">;(Identifier.GetBuffer());
...
}

Identifier is a CString variable.

Following is error message:

error C2663: 'ATL::CSimpleStringT<BaseType,t_bMFCDLL>::GetBuffer' : 2 overloads have no legal conversion for 'this' pointer
1> with
1> [
1> BaseType=char,
1> t_bMFCDLL=true
1> ]

Hi DavidCrow, I am sorry. I tried to vote "5". But I hited the "1"

David Crow16-Jun-09 3:36

David Crow

16-Jun-09 3:36

transoft wrote:
outputStream << static_cast ;(Identifier.GetBuffer());

Assuming Identifier is a CString object, this should suffice:

outputStream << Identifier;

transoft16-Jun-09 4:06

transoft

16-Jun-09 4:06

Sometime I am in hurry to fix something, this fix I should try myself. Thank you very much for your answer.

Best regards,

CPallini16-Jun-09 3:07

Re: Access denied to file

16-Jun-09 3:07

Usually GetBuffer is not needed when you need a const.
Moreover, you need explicit, written authorization by Mark Salsbery, before using GetBuffer... Roll eyes | :rolleyes:

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Access denied to file

hb_harshad16-Jun-09 2:25

hb_harshad

16-Jun-09 2:25

I have a file on NTFS drive, when I try to shift + delete that file I get a message access denied. I also checked ACL for that file in which administrator have full control on that file. I also tried to modify security attributes of that file. But every thing is disabled on security tab. When I try to take ownership of file I got message “You only have permission to view the current owner of the file”. (In this case it is Administrators group). I have logged in as an Administrator (which is member of Administrators group) but still I am not able to delete it.

I insured that the file is not loaded in memory, nor it is locked by any other process (I insured it through procmon.exe).

I thought explorer.exe might not have sufficient privileges to deal with that file so I create application having SE_TAKE_OWNERSHIP, SE_BACKUP_NAME and SE_RESTORE_NAME privileges and now try to get access rights or taking ownership of that file but still not get succeed in it.

So please let me know how to delete that file programmatically.

Thanks in advance.

David Crow16-Jun-09 2:50

David Crow

16-Jun-09 2:50

hb_harshad wrote:
So please let me know how to delete that file programmatically.

Until you find out why the file cannot be deleted via Explorer and the OS, I wouldn't worry about code.

Re: Access denied to file

hb_harshad16-Jun-09 3:50

hb_harshad

16-Jun-09 3:50

Hi DavidCrow,
Thanks for your reply.

I think it might be because of Security descriptor settings.
Can you please tell me in what cases Windows show message box "You only have permissions to view the current owner of file" when you try to change the owner of file. Also I am not able to add or delete any ACE. Is their any modification in local policy or group policy settings.

Thanks.

Error in Resource

MsmVc16-Jun-09 1:50

MsmVc

16-Jun-09 1:50

Hi All

I am getting fatal error in resource file.

Debug\RCa03488(576) : fatal error RC1120: out of memory, needed 2941934093 bytes

Plz help me

Re: Error in Resource

CPallini16-Jun-09 2:03

setting properties for mail

16-Jun-09 2:03

See [^].

and, please, switch ON Google... Roll eyes | :rolleyes:

Pardhu_M16-Jun-09 1:42

Pardhu_M

16-Jun-09 1:42

Hi Guys,

The problem with my application i want to set Properties for a message using Mapi(C++), and save the message the messae will be save in outlook. i am able to set BODY,SUBJECT, but iam not able to set email adress for it, so that mail property is not appearing when i opened in outlook and see TO Adress . can any body help me out .

Here is the sample code what i wrote.

SPropValue props[4] = {0} ;

props[0].ulPropTag = PR_BODY ;
props[0].Value.lpszW = _T("hai dolly") ;
props[1].ulPropTag = PR_SUBJECT ;
props[1].Value.lpszW = _T("how r u dolly");
props[2].ulPropTag = PR_SENDER_EMAIL_ADDRESS;//Problem here
props[2].Value.lpszW =_T("xyz@gmail.com") ;//problem here

props[3].ulPropTag = PR_MESSAGE_FLAGS ;
props[3].Value.ul = MSGFLAG_SUBMIT | MSGFLAG_READ ;

hr = pNewMessage->SetProps( 3, props, NULL ) ;
hr = pNewMessage->SaveChanges(0);

Re: setting properties for mail

Stuart Dootson16-Jun-09 2:42

16-Jun-09 2:42

Pardhu_M wrote:
see TO Adress

Pardhu_M wrote:
props[2].ulPropTag = PR_SENDER_EMAIL_ADDRESS;//Problem here
props[2].Value.lpszW =_T("xyz@gmail.com") ;//problem here

Those two seem to contradict each other - you're setting the 'sender' e-mail address, but looking at the 'TO' address field?

Anyway - to tell a MAPI message who it's addressed to, you use IMessage::ModifyRecipients[^], IIRC.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

add value to node..

p_196016-Jun-09 0:13

p_1960

16-Jun-09 0:13

Hi,
May i know how can i add a value for an Xmlnode.. using msxml..when im trying to use
BSTR bstr2;
Node1->get_text(&bstr2);
Node->put_text(&bstr2);

im getting the below error

error C2664:
L::IXMLDOMNode::put_text' : cannot convert parameter 1 from 'BSTR * ' to 'BSTR'

Re: add value to node..

CPallini16-Jun-09 0:25

Displaying Special symbols on the dialog window.

16-Jun-09 0:25

p_1960 wrote:
Node->put_text(&bstr2);

Should be

Node->put_text(bstr2);

aravind.sn15-Jun-09 23:34

aravind.sn

15-Jun-09 23:34

Hello
Im stuck with the problem of displaying special symbols
say
m_up_direction=　"↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑";
or
m_down_direction=　"↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ";
on the dialog window(im using vc++ 6.0)
could any please help ,e whether i need to type cast the expression or do any setting...??
-thanks

Re: Displaying Special symbols on the dialog window.

Stuart Dootson15-Jun-09 23:54

Re: Displaying Special symbols on the dialog window.

15-Jun-09 23:54

I'm presuming that the arrow symbols are in the symbols font?

In that case, you'll need something like this (it's taken pretty much verbatim from some of my own code):

class MyDialog : public CDialog
{
   CButton m_up_direction;
   CButton m_down_direction;
   CFont symbols_;
};

BOOL MyDialog::OnInitDialog()
{
   CDialog::OnInitDialog();
   if (symbols_.CreatePointFont(100, "Symbol"))
   {
      m_up_direction.SetFont(&symbols_);
      m_down_direction.SetFont(&symbols_);
   }
   else // If we can't create the font, use some ugly ASCII-art arrow-esque figures.
   {
      m_up_direction.SetWindowText("^");
      m_down_direction.SetWindowText("V");
   }
}

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

aravind.sn16-Jun-09 0:01

aravind.sn

16-Jun-09 0:01

hey Stuart,,
thanks ya for the reply,,
but actually im trying to put the unicode strings on the window.
also there is one more method to retrieve from an unicode file(where these ↑ and ↓ are being stored) and display it on the window..
since those stuffs make my project messy,, thought of putting direct unicode string in the code,, i thing may be the numeric value of the unicode may work...

Re: Displaying Special symbols on the dialog window.

Stuart Dootson16-Jun-09 0:06

Re: Displaying Special symbols on the dialog window.

16-Jun-09 0:06

aravind.sn wrote:
but actually im trying to put the unicode strings on the window.

I'm guessing that'll only work if IsWindowUnicode[^] returns TRUE for the window?

Also, you'll either want to #define UNICODE and _UNICODE to get the Unicode APIs, or use the xxxW variants of the API calls.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

aravind.sn16-Jun-09 2:32

aravind.sn

16-Jun-09 2:32

Thank you,,
i just did and array of (unsigned short)decimal values for the unicode.
then to CString.
thanks stuart for ya reply... Smile | :)

MSXML::IXMLDOMNodeListPtr

p_196015-Jun-09 21:32

p_1960

15-Jun-09 21:32

Hi,
when im trying to get the childs of an Xml node in a MSXML::IXMLDOMNodeListPtr ...ie

MSXML::IXMLDOMNodeListPtr NodeList;
MSXML::IXMLDOMNodePtr Node;//contains the address of sample1 node
MSXML::IXMLDOMNodeListPtr List=Node->get_childNodes(&pXMLNodeList);
long Length;
List->get_length(&lLength);

Length is showing as 1...but it should show 0 bcos there are no Xml childnodes..but it is treating "3" as a node which is a value...
The issue is how can i get the number of childnodes in an XML node...

<sample>
<sample1>3</sample1>
<sample2>4</sample2>
</sample>

Re: MSXML::IXMLDOMNodeListPtr

CPallini15-Jun-09 21:50