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From: Lewis_Evans@Playstation.sony.com
Newsgroups: scee.yaroze.beginners
Subject: I can'tuse math functions!!!!
Date: 25 Feb 1998 10:11:26 -0000
Organization: Sony Computer Entertainment Europe - 119.SS5
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From: Lewis_Evans@Playstation.sony.com
To: news@playstation.co.uk

Note that floating-point is not very fast.

You may be better off doing 'fractional fixed point'. eg using a 32-bit int
as u_short integer part (top 16 bits) and 0-4095 fractional part (lower 16
bits)

eg
     // second arg must be 0 to 4095
int MakeComposite (int integerPart, int fractionalPart)
{
     return( (integerPart << 16) + fractionalPart);
}

void DecomposeComposite (int composite, int *integerPart, int
*fractionalPart)
{
     *integerPart = composite >> 16;
     *fractionalPart = composite & 0xffff;
}

This way, you get the fractional functionality of float, running faster,
and no undefined conversion problems.

     Lewis


To:       Lewis Evans
cc:
From:     news @ playstation.co.uk
Subject:  I can'tuse math functions!!!!:scee.yaroze.beginners




From: "Emanuele Diotallevi" <g.mork@flashnet.it>
Newsgroups: scee.yaroze.beginners
Subject: I can'tuse math functions!!!!
Why with codewarrior i can't use math function ????
The Linker says every time  that are not defined convertion functions
FloatingPoint<----->no Floating Point types!!!!
If there's someone that have some sqrt or e^x function tables please help
me!!
                         Diotallevi Emanuele