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greg |
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/*
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** Author: Christian Reetz ([email protected])
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*/
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#ifndef __GBASIC_H
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#define __GBASIC_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <math.h>
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#ifndef g3Float
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#define g3Float double
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#define USE_DOUBLE 1
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#define GB_EPSILON 1e-6
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#else
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#define GB_EPSILON 1e-4
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#endif
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typedef unsigned char uchar;
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#define DEG2RAD(x) ((x)*M_PI/180.0)
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#define RAD2DEG(x) ((x)*180.0/M_PI)
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#define GB_SWAP(a,b) {g3Float temp=(a);(a)=(b);(b)=temp;}
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#define gb_swap(a,b) GB_SWAP(a,b)
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#define gb_random() (((g3Float) rand())/(RAND_MAX-1))
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int gb_epsorder(g3Float a,g3Float b);
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int gb_epseq(g3Float a,g3Float b);
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int gb_inrange(g3Float a,g3Float rb,g3Float re);
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int gb_signum(g3Float a);
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g3Float gb_max(g3Float a,g3Float b);
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g3Float gb_min(g3Float a,g3Float b);
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/* Roots of quadratic formula
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Returns zero if roots are not real, 1 for single root and 2 otherwise
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*/
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int gb_getroots(g3Float* r1,g3Float* r2,g3Float a,g3Float b,g3Float c);
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#ifdef __cplusplus
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}
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#endif
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#endif
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