QTS no. 9 - Primitive arrow drawing function

/*
-----------------------------------------
* Game hacking QTS ( Quickie Tip Series )
* no. 9 - Primitive arrow drawing function
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* Author: SEGnosis  - GHAnon.net
* Thanks to:
* bitterbanana      - No known site
* Drunken Cheetah   - No known site
* fatboy88      - No known site
* Geek4Ever         - No known site
* learn_more        - www.uc-forum.com
* Novocaine         - http://ilsken.net/blog/?page_id=64
* Philly0494        - No known site
* Roverturbo        - www.uc-forum.com
* SilentKarma       - www.halocoders.com - offline
* Strife        - www.uc-forum.com
* Wieter20      - No known site
*/

#define PI 3.14159265
#define TWO_PI ( PI * 2 )

#define DegreeToRadian(a)( ( ( a * PI ) / 180.0f ) )
#define LimitTwoPI(a)while( a > TWO_PI )a -= TWO_PI
#define Limit360(a)while( a > 360.0f )a -= 360.0f

//----------------------------------//
void DrawArrow( long x, long y, float fDegrees, DWORD dwLength, DWORD dwAngleDivisor, DWORD dwLineWidth, D3DCOLOR Color )
{
    Limit360( fDegrees );

    DWORD dwAngleLength = dwLength/dwAngleDivisor;

    float fRightAngle = 135.0f + fDegrees,
          fLeftAngle  = 225.0f + fDegrees;

    Limit360(fRightAngle);
    Limit360(fLeftAngle);

    fRightAngle = DegreeToRadian( fRightAngle );
    fLeftAngle  = DegreeToRadian( fLeftAngle );
    fDegrees    = DegreeToRadian( fDegrees );

    POINT pt = { cos( fDegrees ) * dwLength + x, sin( fDegrees ) * dwLength + y };

    CDraw.Line( x, y, pt.x, pt.y, dwLineWidth, Color );

    CDraw.Line( pt.x, pt.y, cos( fRightAngle ) * dwAngleLength + pt.x,
                            sin( fRightAngle ) * dwAngleLength + pt.y, dwLineWidth, Color );

    CDraw.Line( pt.x, pt.y, cos( fLeftAngle ) * dwAngleLength + pt.x,
                            sin( fLeftAngle ) * dwAngleLength + pt.y, dwLineWidth, Color );
}
//----------------------------------//