Re: help needed for encoding / saving "*.raw" images. - C / C++ / MFC Discussion Boards

Re: Avoid use of page file

RomTibi3-Feb-09 8:51

RomTibi

3-Feb-09 8:51

Thanks!

36. When you surround an army, leave an outlet free.
...
Do not press a desperate foe too hard.

SUN-TZU - Art of War

Can't reference COM type library in x64 visual studio?

Will58013-Feb-09 4:14

Will5801

3-Feb-09 4:14

http://www.codeproject.com/KB/IP/SENSNetworkEvents.aspx[^]

When attempting to load this project on x64, the SENS type libary is not available in the COM tab of the References dialog.

SENS.DLL seems to be correctly registered in the registry as a type library but is not recognized in Visual Studio.

The example project is C# but the problem persists in C++ projects too.

It works fine on 32 bit.

Have tested this on several x64 boxes, same result.

Is the Visual Studio builder broken?

Re: Can't reference COM type library in x64 visual studio?

«_Superman_»3-Feb-09 18:42

«_Superman_»

3-Feb-09 18:42

Looks like SENS.dll is built as a 32-bit binary.
If so, 64-bit EXEs cannot load 32-bit DLLs and vice versa.

«_Superman_»

Re: Can't reference COM type library in x64 visual studio?

Will58015-Feb-09 1:10

Will5801

5-Feb-09 1:10

I have two versions of SENS.DLL both version 5.2.3790.3959

According to WinMerge they are binary identical. However, they are different sizes on disk?

C:\windows\system32\sens.dll (65,024 bytes)
C:\windows\sysWOW64\sens.dll (37,376 bytes)

I also loaded them both into TextPad and they appear identical, both have length of 37,376

Why they appear different sizes on disk?

It appears that MS has accidentally released a 32 bit build of the DLL for both 32 bit and 64 bit use?

help needed for encoding / saving "*.raw" images.

cool guy Tmk3-Feb-09 3:37

cool guy Tmk

3-Feb-09 3:37

Hi,

I would like to know how to encode an image ( BMP / JPG) to raw images using VC++ 6.0. Presently I am using CxImage to read and display images in my application. We can read "*.raw" images using CxImage, but we can't save in "*.raw" format. It would be great help if some one can guide me regarding this.

Thanks and Regards,
Kishan

Re: help needed for encoding / saving "*.raw" images.

Stuart Dootson3-Feb-09 5:52

Stuart Dootson

3-Feb-09 5:52

You've got access to the source, haven't you? That should make writing a raw image saver simple enough.

Re: help needed for encoding / saving "*.raw" images.

Saurabh.Garg3-Feb-09 16:34

Saurabh.Garg

3-Feb-09 16:34

I might be wrong but it doesn't makes sense to write an image back to raw format. Raw file is supposed to contain the raw unprocessed data from a camera. If you process it then its no longer raw data, and you shouldn't save to as raw format.

-Saurabh

Re: help needed for encoding / saving "*.raw" images.

Hamid_RT3-Feb-09 20:59

Hamid_RT

3-Feb-09 20:59

See here[^] for more info about RAW file format.

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

Euler's Contant To The X Power

little_missy3-Feb-09 2:11

little_missy

3-Feb-09 2:11

How do you make a program in C++ that computes for this:

e^x = 1 + (x/1!) + ([x^2]/2!) + ([x^3]/3!) + ... + ([x^n]/n!)

where e is the euler's contant, x is the input

there should be 500 addends (so n = 499)

Thank you Big Grin | :-D

Re: Euler's Contant To The X Power

toxcct3-Feb-09 2:34

toxcct

3-Feb-09 2:34

#include <cmath>
 
::exp(x);

also, you could have a look here[^]

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

Re: Euler's Contant To The X Power

little_missy3-Feb-09 23:53

little_missy

3-Feb-09 23:53

I don't understand what I have to do with the link you gave me. I really need this tonight. Please please please help me. I'm a noob in C++

Re: Euler's Contant To The X Power

toxcct4-Feb-09 0:02

toxcct

4-Feb-09 0:02

I gave you the solution to get it calculated easily, by using the exp() function.

the link was an additional tip to see it used in a real context.

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

Re: Euler's Contant To The X Power

cmk3-Feb-09 6:09

cmk

3-Feb-09 6:09

You need to use a bignum library to calc the large exponents/factorals and maintain precision.

http://en.wikipedia.org/wiki/Arbitrary-precision_arithmetic[^]

...cmk

The idea that I can be presented with a problem, set out to logically solve it with the tools at hand, and wind up with a program that could not be legally used because someone else followed the same logical steps some years ago and filed for a patent on it is horrifying.
- John Carmack

Re: Euler's Contant To The X Power

Luc Pattyn3-Feb-09 6:21

Luc Pattyn

3-Feb-09 6:21

Hi,

this is elementary.

as always, express each term of the series as a product of the previous term and some factors;
that will give you:
- the most efficient way to perform the calculations
- the fact that the terms decrease as soon as n exceeds x
- a reasonable test for early termination of the series (for small x that is)

there is no need for special libraries, just use doubles.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

- before you ask a question here, search CodeProject, then Google
- the quality and detail of your question reflects on the effectiveness of the help you are likely to get
- use the code block button (PRE tags) to preserve formatting when showing multi-line code snippets

Re: Euler's Contant To The X Power

cmk3-Feb-09 21:12

cmk

3-Feb-09 21:12

(S)He stated (s)he wants to expand to ~500.
(S)He will likely exceed the precision of a double by the mid teens.

keyboard event

hrishiS3-Feb-09 1:18

hrishiS

3-Feb-09 1:18

Hi everyone...
Could anyone please tell me how to check for an keyboard event in win32 consol application...
I have an while loop
while(1)
{
}

I need to check each time if I have pressed a particular key....say "h"

Thanks in advance

I am a learner Always

Re: keyboard event

CPallini3-Feb-09 1:40

CPallini

3-Feb-09 1:40

Are you looking for this [^]?
Smile | :)

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]

Re: keyboard event

hrishiS3-Feb-09 1:46

hrishiS

3-Feb-09 1:46

thanks...
But those are blocked call.....I want something like this...
My while loop keeps running.....and it checks for a key...if it was pressd it exits....But if it wasnot pressed also, my while loop keep running(iterating..)
Basically i need a nonblocking function....asynchronous

Thanks

I am a learner Always

Re: keyboard event

CPallini3-Feb-09 2:05

CPallini

3-Feb-09 2:05

See here [^].
Smile | :)

Re: keyboard event

Stuart Dootson3-Feb-09 2:06

Stuart Dootson

3-Feb-09 2:06

You could try using _kbhit[^].

Re: keyboard event

Nibu babu thomas3-Feb-09 2:03

Nibu babu thomas

3-Feb-09 2:03

himangshuS wrote:
I need to check each time if I have pressed a particular key....say "h"

Use _kbhit() in combination with getch().

Nibu babu thomas
Microsoft MVP for VC++

Code must be written to be read, not by the compiler, but by another human being.

Programming Blog: http://nibuthomas.wordpress.com

Re: keyboard event

hrishiS3-Feb-09 2:42

hrishiS

3-Feb-09 2:42

thanks...

I am a learner Always

Platform SDK: Get domain name

Stefan Spenz3-Feb-09 1:18

Stefan Spenz

3-Feb-09 1:18

I need to get the domain name for the currently logged on user.
::GetUserName gets me the user name, but how do I get the domain name for that user?

Thanks!

Re: Platform SDK: Get domain name

Supriya Tonape3-Feb-09 1:43

Supriya Tonape

3-Feb-09 1:43

With, Win32_LogonSession you will get 'LogonId' use this logonId to query the Win32_LoggedOnUser. After querying 'Win32_LoggedOnUser' you will get all the fields, like - Domain, Name etc

Supriya

Re: Platform SDK: Get domain name

Stuart Dootson3-Feb-09 1:59

Stuart Dootson

3-Feb-09 1:59

Use NetWkstaUserGetInfo[^] and retrieve level 1 information, as below. Requires Windows NT 3.1, 2000, XP, Vista.

#include <Windows.h>
#include <lm.h>

std::wstring GetDomainName()
{
   WKSTA_USER_INFO_1* workstationInfo;
   const NET_API_STATUS status = NetWkstaUserGetInfo(NULL, 1, (LPBYTE*)&workstationInfo);
   if (status == NERR_Success)
   {
      return workstationInfo->wkui1_logon_domain;
      NetApiBufferFree((LPBYTE*)&workstationInfo);
   }
   return std::wstring();
}

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.