56 lines
1.6 KiB
C++
Executable File
56 lines
1.6 KiB
C++
Executable File
#pragma once
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#include <iostream>
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#include "math.h"
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class vec3
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{
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public:
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static vec3 random();
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static vec3 random(double min, double max);
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static vec3 random_in_unit_disk();
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static vec3 random_unit_vector();
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static vec3 random_in_unit_sphere();
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static vec3 random_in_hemisphere(const vec3& normal);
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vec3() : e{0,0,0} {}
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vec3(double e0, double e1, double e2) : e{e0, e1, e2} {}
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double x() const { return e[0]; }
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double y() const { return e[1]; }
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double z() const { return e[2]; }
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double length() const;
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double length_squared() const;
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vec3 operator-() const { return vec3(-e[0], -e[1], -e[2]); }
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double operator[](int i) const { return e[i]; }
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double& operator[](int i) { return e[i]; }
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vec3& operator+=(const vec3 &v);
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vec3& operator*=(const double t);
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vec3& operator/=(const double t);
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friend std::ostream& operator<<(std::ostream &out, const vec3 &v);
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friend vec3 operator+(const vec3 &u, const vec3 &v);
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friend vec3 operator-(const vec3 &u, const vec3 &v);
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friend vec3 operator*(const vec3 &u, const vec3 &v);
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friend vec3 operator*(double t, const vec3 &v);
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friend vec3 operator*(const vec3 &v, double t);
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friend vec3 operator/(vec3 v, double t);
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friend vec3 lerp(const vec3 &a, const vec3 &b, double t);
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friend vec3 reflect(const vec3& v, const vec3& n);
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friend vec3 refract(const vec3& uv, const vec3& n, double etai_over_etat);
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friend double dot(const vec3 &u, const vec3 &v);
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friend vec3 cross(const vec3 &u, const vec3 &v);
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friend vec3 normalize(vec3 v);
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private:
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double e[3];
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};
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// type aliases for vec3
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using point3 = vec3; // 3D point
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