bits functions (set, unset, test)

freddix wrote:
I've checked over the net and on my C book to understand how I can set/clear or test a bit in an int value but it remain unclear for me :(

I've found how to test !

int TestBit( int Var, int itID ){
return Var & ( 1<<BitID );
}

But not how to set/clear.

Can someone help me ?

EDIT :
I think I've found a solution :


void SetBit( int *Var, int BitID ){
*Var = *Var | ( 1<<BitID );
}

void ClearBit( int *Var, int BitID ){
*Var = *Var ^ ( 1<<BitID );
}

Do you think it's correct ?


Regards,
Freddix / AmiDARK

void ClearBit( int *Var, int BitID ){
*Var = *Var ^ ( 1<<BitID );
}

2009.12.04:
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- Addition of internal management functions of bits (set / clear / test)
- Added function DESyncMask () and its management in the Proceedings of cameras.

2009.11.29:
------------
- Added playback functions of free memory
- Added functions to enable / disable the Escape key to exit the application.
- Placing orders DESyncOn () DESyncOff () DESyncRate (VAL);

2009.11.27:
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- Fix the glClear mode multi-cameras to delete only the area of the current camera.

2009.11.25:
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- Added timer.device to manage functions of frame rate and animations.
- Added functions DEScreenFPS () and DEStatistics ()

2009.11.23:
-----------
- Improved user function DEKeyState ()
- Improved internal function MyKeyboardFunc () management via the keyboard MiniGL.
- Fix for managing the backdrop for the cameras not to erase the traces Basic2D.
- Added function: DEBoxEx (Left, Top, Right, Bottom, Color1, Color2, color3, color4)
- Added support for background color cameras (Backdrop)
- Added support for the close button of window to exit the application.
- Addition of various orders of "core".

2009.11.11:
------------
- If object 3D insensitive to light, turning off the global illumination on the object.


2009.11.08:
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- Amendments to applications textures to match DarkBASIC Professional
- Change the camera to move as default DarkBASIC Professional
- Change the camera to move as default DarkBASIC Professional

2009.11.03:
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- Added support for various keyboard functions (scancode, Keystation, special keys: up, down, left, right, function keys F1 to F12

2009.10.25;
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BASIC 3D
- Added command: DEScrollObjectTexture (ObjectID, Uf, Vf)
- Added command: DEScaleObjectTexture (ObjectID, XScale.f, yScale f)

2009.10.17:
-----------
BASIC 3D
- Added support for bilinear / trilinear / no filtering on 3D objects.
- Added support for extra propoerties (fog, light, ambient 3D objects sensitivity)
- Added support for object Ambience, Specular, Diffuse and Emissive Properties functions.
SETUP
- Added support for switching from windowed to fullscreen and reverse.

2009.10.16:
------------------
BASIC 3D
- Added support for Ghost Object functions (On / Off Ex with support for dark ghost mode too)
- Added support for ScaleObject () function
IMAGE
- Added DrawToFront & DrawToBack priority function to change between 2D and 3D drawing.

2009.10.12:
------------------
BASIC 3D
- Added support for transparency using BLENDING command set: Set One Alpha Mapping.

2009.10.05:
------------------
BASIC 3D
- Fixed Camera & Objects rotation to be the same than Default DarkBASIC Professional ones.
- Added support for 3D Objects bodies.

2009.10.05:
------------------
FILE
- Added support for FILES command set (OpenToRead, OpenToWrite, Close, MakeMemblockFromfile)


2009.09.01:
-----------------
Basic3D
- Support for Loading Images as Images & Textures
- Support for Objects Texturing, Lighting (Light 0) Normals.
LIGHTS
- Adding Ambient light support
IMAGE
- Adding some IMAGE command set
MEMBLOCK
- Adding some MEMBLOCK command set
SYSTEM
- Internal structure object development.