57 lines
1 KiB
C++
57 lines
1 KiB
C++
#ifndef RTWEEKEND_H
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#define RTWEEKEND_H
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#include <math.h>
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#include <memory>
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/* Utility functions */
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double degrees_to_radians(double d)
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{
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return d * M_PI / 180;
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}
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/* Returns a double in the range [0,1) */
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inline double random_double()
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{
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return rand() * (1.0 / RAND_MAX);
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}
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/* Returns a double in the range [min,max) */
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inline double random_double(double min, double max)
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{
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return min + (max-min) * random_double();
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}
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/* Clamps a value between [min,max] */
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inline double clamp(double v, double min, double max)
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{
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return v < min ? min : v > max ? max : v;
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}
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/* Common internal headers */
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#include "ray.hpp"
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#include "vec3.hpp"
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struct material;
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/* Common data structures */
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struct hit_record {
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point3 p;
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vec3 normal;
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std::shared_ptr<material> mat_ptr;
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double t;
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bool front_face;
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inline void set_face_normal(const ray& r, const vec3& outward_normal)
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{
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front_face = dot(r.direction, outward_normal) < 0;
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normal = front_face ? outward_normal : -outward_normal;
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}
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};
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#endif
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