52 lines
1.1 KiB
C++
52 lines
1.1 KiB
C++
/*
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* DoRayMe - a quick and dirty Raytracer
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* Tuples implementation
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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 <tuple.h>
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#include <math.h>
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double Tuple::magnitude()
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{
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return sqrt(pow(this->x, 2) + pow(this->y, 2) + pow(this->z, 2) + pow(this->w, 2));
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}
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Tuple Tuple::normalise()
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{
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double mag = this->magnitude();
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if (mag == 0)
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{
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return Tuple(0, 0, 0, 0);
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}
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return Tuple(this->x / mag, this->y / mag, this->z / mag, this->w / mag);
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}
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double Tuple::dot(const Tuple &b)
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{
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return this->x * b.x + this->y * b.y + this->z * b.z + this->w * b.w;
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}
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Tuple Tuple::cross(const Tuple &b) const
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{
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return Tuple(this->y * b.z - this->z * b.y,
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this->z * b.x - this->x * b.z,
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this->x * b.y - this->y * b.x,
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0);
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}
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Tuple Tuple::reflect(const Tuple &normal)
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{
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return *this - normal * 2 * this->dot(normal);
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}
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bool Tuple::isRepresentable()
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{
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return !(isnan(this->x) || isnan(this->y) || isnan(this->z) ||
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isinf(this->x) || isinf(this->y) || isinf(this->z));
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} |