fracfill.cpp File Reference

(r1785/r1282)

#include "camtypes.h"
#include "bitmpinf.h"
#include "fracfill.h"

Go to the source code of this file.

Defines
#define	new   CAM_DEBUG_NEW
#define	DoRand(Seed1, Seed2, t)
	Find the next random number in a sequence as detailed ARM data manual p 2-51.
Functions
	DECLARE_SOURCE ("$Revision: 1282 $")
Variables
const INT32	MAX_FRACTAL_COORD = (1<<28)

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Define Documentation

#define DoRand (  Seed1, Seed2, t   )

Value: t = ((UINT32)(Seed1) >> 1 ) ^ ((UINT32)(Seed2)<<31); \ Seed2 = ((UINT32)(Seed1) & 1); \ t ^= (UINT32)(Seed1) << 12; \ Seed1 = ((UINT32)(t)) ^ ((UINT32)(t>>20)); Find the next random number in a sequence as detailed ARM data manual p 2-51. Author: Alex_Bligh (Xara Group Ltd) <camelotdev@xara.com> Date: 12/9/94 Parameters: NewSeed  - the new seed [INPUTS] a  random number & changes seed [OUTPUTS] Returns: Nothing Errors: - See also: - This is a Roger/Sophie Wilson routine port and thus incomprehensible ARM Code: ; Enter with seed in R0 (32 bits) R1 (1 bit in b0 only) TST R1, R1, LSR #1 ; b0 into carry MOVS R2, R0, RRX ; 33 bit rotate ADC R1, R1, R1 ; Carry into lsb of R1 (rest of it junked) EOR R2, R2, R0, LSL #12 ; dual EOR R0, R2, R2, LSR #20 ; tap ; exit as before Definition at line 180 of file fracfill.cpp.

#define new   CAM_DEBUG_NEW

Definition at line 124 of file fracfill.cpp.

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Function Documentation

DECLARE_SOURCE (  "$Revision: 1282 $"   )

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Variable Documentation

const INT32 MAX_FRACTAL_COORD = (1<<28)

Definition at line 127 of file fracfill.cpp.

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