70 lines
1.0 KiB
C++
70 lines
1.0 KiB
C++
/*
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* DoRayMe - a quick and dirty Raytracer
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* Math helping functions
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*
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* Created by Manoël Trapier
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* Copyright (c) 2020 986-Studio.
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*
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*/
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#include <math.h>
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#include <float.h>
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#include <math_helper.h>
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static double current_precision = FLT_EPSILON;
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void set_equal_precision(double v)
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{
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current_precision = v;
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}
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double getEpsilon()
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{
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return current_precision;
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}
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bool double_equal(double a, double b)
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{
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if (isinf(a) && isinf(b))
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return true;
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return fabs(a - b) < current_precision;
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}
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double deg_to_rad(double deg)
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{
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return deg * M_PI / 180.;
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}
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double min3(double a, double b, double c)
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{
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if (a <= b)
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{
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if (c < a) return c;
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return a;
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}
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if (b <= a)
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{
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if (c < b) return c;
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}
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return b;
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}
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double max3(double a, double b, double c)
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{
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if (a >= b)
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{
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if (c > a) return c;
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return a;
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}
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if (b >= a)
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{
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if (c > b) return c;
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}
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return b;
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}
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double frand()
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{
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return rand() / ((double) RAND_MAX);
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} |