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101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
#ifndef SLAMACHDEF
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#define SLAMACHDEF
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/*
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** - - - - - - - - -
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** s l a m a c . h
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** - - - - - - - - -
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**
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** Macros used by slalib library.
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**
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** Last revision: 5 June 1996
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**
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** Copyright P.T.Wallace. All rights reserved.
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*/
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/* max(A,B) - larger (most +ve) of two numbers (generic) */
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#define gmax(A,B) ((A)>(B)?(A):(B))
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/* min(A,B) - smaller (least +ve) of two numbers (generic) */
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#define gmin(A,B) ((A)<(B)?(A):(B))
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/* dint(A) - truncate to nearest whole number towards zero (double) */
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#define dint(A) ((A)<0.0?ceil(A):floor(A))
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/* aint(A) - truncate to nearest whole number towards zero (float) */
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#define aint(A) ((A)<0.0f?(float)ceil((double)(A)):(float)floor((double)(A)))
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/* dnint(A) - round to nearest whole number (double) */
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#define dnint(A) ((A)<0.0?ceil((A)-0.5):floor((A)+0.5))
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/* anint(A) - round to nearest whole number (float) */
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#define anint(A) ((float)dnint((double)(A)))
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/* dsign(A,B) - magnitude of A with sign of B (double) */
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#define dsign(A,B) ((B)<0.0?-(A):(A))
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/* dmod(A,B) - A modulo B (double) */
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#define dmod(A,B) ((B)!=0.0?((A)*(B)>0.0?(A)-(B)*floor((A)/(B))\
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:(A)+(B)*floor(-(A)/(B))):(A))
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/* logicals */
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#if !defined(FALSE) || ((FALSE)!=0)
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#define FALSE 0
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#endif
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#if !defined(TRUE) || ((TRUE)!=1)
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#define TRUE 1
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#endif
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/* pi */
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#define DPI 3.1415926535897932384626433832795028841971693993751
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/* 2pi */
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#define D2PI 6.2831853071795864769252867665590057683943387987502
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/* 1/(2pi) */
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#define D1B2PI 0.15915494309189533576888376337251436203445964574046
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/* 4pi */
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#define D4PI 12.566370614359172953850573533118011536788677597500
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/* 1/(4pi) */
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#define D1B4PI 0.079577471545947667884441881686257181017229822870228
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/* pi^2 */
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#define DPISQ 9.8696044010893586188344909998761511353136994072408
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/* sqrt(pi) */
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#define DSQRPI 1.7724538509055160272981674833411451827975494561224
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/* pi/2: 90 degrees in radians */
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#define DPIBY2 1.5707963267948966192313216916397514420985846996876
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/* pi/180: degrees to radians */
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#define DD2R 0.017453292519943295769236907684886127134428718885417
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/* 180/pi: radians to degrees */
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#define DR2D 57.295779513082320876798154814105170332405472466564
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/* pi/(180*3600): arcseconds to radians */
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#define DAS2R 4.8481368110953599358991410235794797595635330237270e-6
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/* 180*3600/pi : radians to arcseconds */
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#define DR2AS 2.0626480624709635515647335733077861319665970087963e5
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/* pi/12: hours to radians */
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#define DH2R 0.26179938779914943653855361527329190701643078328126
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/* 12/pi: radians to hours */
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#define DR2H 3.8197186342054880584532103209403446888270314977709
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/* pi/(12*3600): seconds of time to radians */
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#define DS2R 7.2722052166430399038487115353692196393452995355905e-5
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/* 12*3600/pi: radians to seconds of time */
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#define DR2S 1.3750987083139757010431557155385240879777313391975e4
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/* 15/(2pi): hours to degrees x radians to turns */
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#define D15B2P 2.3873241463784300365332564505877154305168946861068
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#endif
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