40 lines
801 B
C++
40 lines
801 B
C++
#ifndef RTWEEKEND_H
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#define RTWEEKEND_H
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#include <cmath>
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#include <limits>
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#include <memory>
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#include <cstdlib>
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// Usings
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using std::shared_ptr;
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using std::make_shared;
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using std::sqrt;
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// Constants
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const double infinity = std::numeric_limits<double>::infinity();
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const double pi = 3.1415926535897932385;
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// Utility functions
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inline double degrees_to_radians(double degrees) {
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return degrees * pi / 180.0;
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}
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// Returns a random number between (0,1]
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inline double random_double() {
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return rand() / (RAND_MAX + 1.0);
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}
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inline double clamp(double x, double min, double max) {
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if (x < min) return min;
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if (x > max) return max;
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return x;
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}
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// Returns a random number between (min,max]
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inline double random_double(double min, double max) {
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return min + (max - min) * random_double();
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}
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#endif
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