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Re: matrix Rotation

Luc Pattyn20-May-11 1:42

20-May-11 1:42

I'm assuming you have an affine transformation matrix M as defined here[^].

The translation component is in the last column. When you add some number to M[0,2] you shift horizontally; to M[1,2] you shift vertically.

Therefore, if the object gets translated (not rotated, not scaled, not sheared) from one position to another, just look at the difference of the respective M[0,2] and M[1,2] values. BTW: Once a rotation/scaling/shearing occurs in between, the "translation" becomes ambiguous.

Suggestion: whatever transformation you do, watch what it does to the matrix, and things should become pretty clear.

Smile | :)

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.

Re: matrix Rotation

002comp20-May-11 2:56

20-May-11 2:56

Hello Luc, You are Right..I am using transformation Matrix.

I am having two matrix one with original value and other iwth final matrix values but no idea of getting the difference between them.

Thanks for your reply.

regards
yogesh

Re: matrix Rotation

David Crow20-May-11 3:06

20-May-11 3:06

yogeshs wrote:
I know this is not related to c++...i have to implement it in c++

Yeah, that's not confusing at all. Unsure | :~

Unsure | :~

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File creation time

tasumisra19-May-11 22:56

19-May-11 22:56

Hi Guys,

Looking for help in finding Timestamp of a text file.
i have tried googling ,seems Stat can help but dont know how to use it.

any help is much apprciated.

Thank you.

vikas da

Re: File creation time

Richard MacCutchan19-May-11 23:18

Richard MacCutchan

19-May-11 23:18

stat is probably not used so much theses days, GetFileTime()[^] will probably be what you need.

The best things in life are not things.

Re: File creation time

mosealex20-May-11 3:55

20-May-11 3:55

Sorry! Dint get your question.
Do you want file creation time?

Re: File creation time

Richard MacCutchan20-May-11 4:23

Richard MacCutchan

20-May-11 4:23

I didn't post a question, I posted an answer.

The best things in life are not things.

Re: File creation time

Chandrasekharan P19-May-11 23:25

Chandrasekharan P

19-May-11 23:25

Have a look at this
http://msdn.microsoft.com/en-us/library/ms724320%28v=vs.85%29.aspx[^]

john563219-May-11 21:53

19-May-11 21:53

Hi,

I am drwaing image using Image::DrawImage and same image using CDC::BitBlt with same x,y position.
But both methods are drawing image on diffrent axis(x,y). How could I draw on same position for both?

Cool_Dev19-May-11 22:17

19-May-11 22:17

show code snippet or give more info..

john563219-May-11 23:07

19-May-11 23:07

using BitMlt:

CRect rect;
	this->GetWindowRect( &rect );
	this->GetParent()->ScreenToClient( rect );
 CBitmap img;
   CDC dc;
   BITMAP bmp;
   img.LoadBitmap(m_nImageID);
   img.GetBitmap(&bmp);
   CDC* pDC = this->GetDC();
   dc.CreateCompatibleDC(pDC);
   CBitmap* pOld = dc.SelectObject(&img);
pDC->BitBlt(rect.left, rect.top, bmp.bmWidth, bmp.bmHeight, &dc, 0, 0, SRCCOPY);

using Image::DrawImage

CRect rect;
	this->GetWindowRect( &rect );
	this->GetParent()->ScreenToClient( rect );
m_img = Gdiplus::Bitmap::FromResource(GetModuleHandle(0),MAKEINTRESOURCE(nImage));
grpx.DrawImage(m_img, 0, 0, m_img->GetWidth(),m_img->GetHeight());

Richard MacCutchan19-May-11 23:21

Richard MacCutchan

19-May-11 23:21

What are the values of rect.left and rect.top in case 1?

The best things in life are not things.

john563219-May-11 23:26

19-May-11 23:26

left = 50 and top = 50 in both cases

Richard MacCutchan19-May-11 23:54

Richard MacCutchan

19-May-11 23:54

Fine, but in the second case you are drawing at Point(0, 0)!

The best things in life are not things.

tagopi19-May-11 23:27

19-May-11 23:27

grpx.DrawImage(m_img, 0, 0, m_img->GetWidth(),m_img->GetHeight());

why don't you try using same rect.left and rect.top instead of 0,0 in drawimage??

Regards,
Gopinath.

How can i create one button for two events in C# 2008 vs?

FeniksReborn19-May-11 21:27

19-May-11 21:27

Hello

How can i create one button for two events?
For example: I want to have one button for start/stop.
At the beginning of the application button name is start (start the event ), when I click the button second time it change the name to Stop (stop the event)????

I am very new to C# programming, i know to do this in VB6... Sorry for my bad english!
ThankYou

Re: How can i create one button for two events in C# 2008 vs?

Rhuros19-May-11 21:44

19-May-11 21:44

This is in the wrong forum, try the C# forum next door...

Re: How can i create one button for two events in C# 2008 vs?

Peter_in_278019-May-11 22:31

19-May-11 22:31

About the best redirect I've seen here. +5 Smile | :)

Smile | :)

Peter

Software rusts. Simon Stephenson, ca 1994.

Re: How can i create one button for two events in C# 2008 vs?

Rhuros19-May-11 22:37

19-May-11 22:37

glad you liked it... Smile | :)

Smile | :)

Re: How can i create one button for two events in C# 2008 vs?

Malli_S20-May-11 1:08

20-May-11 1:08

Laugh | :laugh:

[Delegates] [Virtual Desktop] [Tray Me !]

-Malli...!

How send/reseive SMS with a GSM Modem in C++(MFC)

Hadi Dayvary19-May-11 21:26

19-May-11 21:26

Hi Any sample or help?

Thanks

www.logicsims.ir

Re: How send/reseive SMS with a GSM Modem in C++(MFC)

Rhuros19-May-11 21:47

19-May-11 21:47

Hi,

Take a look at thisexample, it does detail the AT codes etc that may help you...

Open and display any image on dialog

manju 319-May-11 20:54

19-May-11 20:54

Hi all,
How can i browse image and display on dialog.Any good links for this.

Thanks
Manju

Re: Open and display any image on dialog

ShilpiP19-May-11 21:14

19-May-11 21:14

Check this link ->[^]

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May we find Hundreds of Reasons to Smile Everyday... and
May WE be the Reason for someone else to smile always!" (ICAN)

MFC, How to activate one document template among multiple document templates

swandream19-May-11 15:11

19-May-11 15:11

the problem of mine is: I defined four document templates "A B C D" in my program and I set the document template "A" as master document template others as slaves.that means I use the master document template to open data and transfer data to other document templates. so I only implement the OnOpenDocument() function of the master document template. after I have finished all the framework. my leader tell me that the view from the "B" document template should be display firstly or on top after the data is opened. so I have to hide the view of master document template and show the view of slave "B" document template. but I found the "B" is not activate, that means all the menu or toolbar command message loop are still clue to master document template. please tell me how to active the B document template and let it to response all the menu commands.

swandream

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