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- /*
- * DoRayMe - a quick and dirty Raytracer
- * Tuples implementation
- *
- * Created by Manoël Trapier
- * Copyright (c) 2020 986-Studio.
- *
- */
- #include <tuple.h>
- #include <math.h>
- double Tuple::magnitude()
- {
- return sqrt(pow(this->x, 2) + pow(this->y, 2) + pow(this->z, 2) + pow(this->w, 2));
- }
- Tuple Tuple::normalise()
- {
- double mag = this->magnitude();
- if (mag == 0)
- {
- return Tuple(0, 0, 0, 0);
- }
- return Tuple(this->x / mag, this->y / mag, this->z / mag, this->w / mag);
- }
- /*
- double Tuple::dot(const Tuple &b)
- {
- return this->x * b.x + this->y * b.y + this->z * b.z + this->w * b.w;
- }
- Tuple Tuple::cross(const Tuple &b) const
- {
- return Tuple(this->y * b.z - this->z * b.y,
- this->z * b.x - this->x * b.z,
- this->x * b.y - this->y * b.x,
- 0);
- }
- */
- Tuple Tuple::reflect(const Tuple &normal)
- {
- return *this - normal * 2 * this->dot(normal);
- }
- bool Tuple::isRepresentable()
- {
- return !(isnan(this->x) || isnan(this->y) || isnan(this->z) ||
- isinf(this->x) || isinf(this->y) || isinf(this->z));
- }
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