Trigometric function

[Vytas]

Hi,

Currently am working with FWH 2.7 January 2007 version Using Harbour Alpha build 45.0 Intl. (Flex).
I require access to the ArcTan function. Is there a library that I can link in to provide the missing trigonometric functions?

Thanks,

Vytas

[Verhoven]

Here is the solution for nearly every function you need: The Taylor series.

http://es.wikipedia.org/wiki/Serie_de_Taylor

This message is in Spanish but you can be sure to find it in English too.

[nageswaragunupudi]

All the necessary Trigonometric functions are available in CT.LIB of XHarbour or HBCT.LIB for Harbour. These libraries come along with xHarbour and Harbour. We just need to link these libraries also to use the functions.

We have SIN, COS, TAN, ASIN, ACOS, ATAN, ATAN2, TANH, etc

[Vytas]

Thanks for pointing me to the newer Harbour software. I cannot link it in using a modified FWH 2.7 link script. Perhaps I need a more current rmk file. If so where can I get one? Or do I have to upgrade my FWH software?

Thanks,

Vytas

[James Bott]

Go to this page and look for trig.zip and triglib.zip.

http://www.the-oasis.net/ftpmaster.php3 ... pgenrl.htm

Regards,
James

[nageswaragunupudi]

Thanks for pointing me to the newer Harbour software. I cannot link it in using a modified FWH 2.7 link script. Perhaps I need a more current rmk file. If so where can I get one? Or do I have to upgrade my FWH software?

Thanks,

Vytas

You can use the FWH 2.7 also.
You need to change your link script to include 'hbct.lib' if you are using Harbour and 'ct.lib' if you are using xHarbour. These libraries should be available in (x)Harbour\lib folder.

Are you using Harbour or xHarbour and which version?

All these trigonometric functions were available from the days of Clipper. Clipper users were required to purchase CA Tools lib separately.

Now (x)Harbour provides these functions free of cost.

[Biel EA6DD]

Include in your PRG, and ready to use. (Tang(n),Atn(),Cos(),Sin(),Acos())

Code: Select all

#pragma BEGINDUMP
#include "windows.h"
#include "math.h"
#include "hbapi.h"

HB_FUNC( TANG )
{
   hb_retnd((double) tan((double)hb_parnd(1) ));
}

HB_FUNC( ATN )
{
   hb_retnd((double) atan((double)hb_parnd(1)));
}
HB_FUNC( COS )
{
   hb_retnd((double) cos((double)hb_parnd(1)));
}
HB_FUNC( ACOS )
{
   hb_retnd((double) acos((double)hb_parnd(1)));
}
HB_FUNC( SIN )
{
   hb_retnd((double) sin((double)hb_parnd(1)));
}

#pragma ENDDUMP