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Resource forks are included only for .rsrc files. These are DeRezzed into their data fork. 'ckid' resources, from the Projector VCS, are not included. The Tools directory, containing mostly junk, is also excluded.
109 lines
3.6 KiB
Plaintext
109 lines
3.6 KiB
Plaintext
;
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; File: FixMath.a
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;
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; Contains: xxx put contents here xxx
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;
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; Written by: xxx put writers here xxx
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;
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; Copyright: © 1991-1992 by Apple Computer, Inc., all rights reserved.
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;
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; Change History (most recent first):
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;
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; <8> 2/11/92 MH Move conditional assembly directive to immediately following
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; copyright notice. This matches the public interface, and reduces
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; assembler overhead in case the file is included more than once.
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; <7> 1/30/91 gbm sab, #38: Change the Ôalready including this fileÕ variable to
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; all uppercase (for security reasons)
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;
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; To Do:
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;
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; Version: 2.94
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; Created: Friday, October 20, 1989 at 9:16:04 PM
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; File: FixMath.a
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;
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; Copyright Apple Computer, Inc. 1984-1988
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; All Rights Reserved
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;
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; 1.0 CCH 11/ 9/1988 Adding to EASE.
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; END EASE MODIFICATION HISTORY
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;¥1.1 CCH 9/14/1988 Updated EASE with the current rev of this file.
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IF &TYPE('__INCLUDINGFIXMATH__') = 'UNDEFINED' THEN
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__INCLUDINGFIXMATH__ SET 1
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; These calls support three types of fixed point numbers, each 32 bits long.
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; The bits are interpreted as shown. The '-' represents the sign bit.
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;
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; Type <---------Integer Portion--------> <-------Fractional Portion------>
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;LongInt -xxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx.
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;Fixed -xxxxxxx xxxxxxxx.xxxxxxxx xxxxxxxx
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;Fract -x.xxxxxxxx xxxxxxxx xxxxxxxx xxxxxx
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;
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; Type LongInt can represent integers between +/-2147483647. Type Fixed can
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; represent fractional quantities between +/-32768, with about 5 digits of
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; accuracy. Type Fract can represent fractional quantities between +/-2 with
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; about 9 digits of accuracy. These numeric representations are useful for
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; applications that do not require the accuracy of the floating point routines,
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; and which need to run as fast as possible. The Graf3D three dimensional
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; graphics package resides on top of these routines. Although FixMul is in the
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; file ToolTraps, it is shown below to show how it handles different types.
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; Additional fixed point routines are described in the Inside Macintosh chapter,
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; ÒToolbox Utilities.Ó
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; FUNCTION FixMul(x, y: Fixed): Fixed;
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; FixMul returns x * y. Note that FixMul effects "type * Fixed --> type":
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; Fixed * Fixed --> Fixed
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; LONGINT * Fixed --> LONGINT
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; Fixed * LONGINT --> LONGINT
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; Fract * Fixed --> Fract
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; Fixed * Fract --> Fract
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; FUNCTION FracMul(x, y: Fract): Fract;
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; FracMul returns x * y. Note that FracMul effects "type * Fract --> type":
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; Fract * Fract --> Fract
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; LONGINT * Fract --> LONGINT
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; Fract * LONGINT --> LONGINT
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; Fixed * Fract --> Fixed
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; Fract * Fixed --> Fixed
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; FUNCTION FixDiv(x, y: Fixed): Fixed;
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; FixDiv returns x / y. Note that FixDiv effects "type / type --> Fixed":
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; Fixed / Fixed --> Fixed
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; LONGINT / LONGINT --> Fixed
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; Fract / Fract --> Fixed
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; LONGINT / Fixed --> LONGINT
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; Fract / Fixed --> Fract
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; FUNCTION FracDiv(x, y: Fract): Fract;
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; FracDiv returns x / y. Note that FracDiv effects "type / type --> Fract":
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; Fract / Fract --> Fract
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; LONGINT / LONGINT --> Fract
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; Fixed / Fixed --> Fract
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; LONGINT / Fract --> LONGINT
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; Fixed / Fract --> Fixed
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; FUNCTION FracSqrt(x: Fract): Fract;
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; FracSqrt returns the square root of x. Both argument and result are regarded
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; as unsigned.
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; FUNCTION FracCos(x: Fixed): Fract;
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; FUNCTION FracSin(x: Fixed): Fract;
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; FracCos and FracSin return the cosine and sine, respectively, given the
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; argument x in radians.
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;The following routines are accessed via the glue code
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;which will call the trap on a 128K ROM machine
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_FracCos OPWORD $A847
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_FracSin OPWORD $A848
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_FracSqrt OPWORD $A849
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_FracMul OPWORD $A84A
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_FracDiv OPWORD $A84B
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_FixDiv OPWORD $A84D
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ENDIF ; ...already included
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