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added origin to Vec3

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This commit is contained in:
Moritz Gmeiner 2023-12-31 13:47:27 +01:00
commit dff32371d7
1 changed files with 9 additions and 18 deletions
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27
src/vec3.h
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@ -10,6 +10,8 @@
class Vec3 {
public:
static const Vec3 origin;
static const Vec3 e_x;
static const Vec3 e_y;
static const Vec3 e_z;
@ -79,6 +81,7 @@ class Vec3 {
std::array<f64, 3> xyz_;
};
constexpr Vec3 Vec3::origin{0.0, 0.0, 0.0};
constexpr Vec3 Vec3::e_x{1.0, 0.0, 0.0};
constexpr Vec3 Vec3::e_y{0.0, 1.0, 0.0};
constexpr Vec3 Vec3::e_z{0.0, 0.0, 1.0};
@ -95,9 +98,7 @@ constexpr Vec3 operator+(const Vec3& u, const Vec3& v) {
return out;
}
constexpr Vec3 operator-(const Vec3& u, const Vec3& v) {
return u + (-v);
}
constexpr Vec3 operator-(const Vec3& u, const Vec3& v) { return u + (-v); }
constexpr Vec3 operator*(const Vec3& u, const Vec3& v) {
return {u.x() * v.x(), u.y() * v.y(), u.z() * v.z()};
@ -109,9 +110,7 @@ constexpr Vec3 operator*(f64 t, const Vec3& v) {
return out;
}
constexpr Vec3 operator/(const Vec3& v, f64 t) {
return (1 / t) * v;
}
constexpr Vec3 operator/(const Vec3& v, f64 t) { return (1 / t) * v; }
constexpr f64 dot(const Vec3& u, const Vec3& v) {
Vec3 tmp = u * v;
@ -123,21 +122,13 @@ constexpr Vec3 cross(const Vec3& u, const Vec3& v) {
u.x() * v.y() - u.y() - v.x()};
}
constexpr f64 Vec3::squared() const {
return dot(*this, *this);
}
constexpr f64 Vec3::squared() const { return dot(*this, *this); }
constexpr f64 Vec3::norm() const {
return std::sqrt(squared());
}
constexpr f64 Vec3::norm() const { return std::sqrt(squared()); }
constexpr Vec3 Vec3::normed() const {
return *this / norm();
}
constexpr Vec3 Vec3::normed() const { return *this / norm(); }
constexpr Vec3 Vec3::reflect(Vec3 normal) const {
return *this - 2 * dot(*this, normal) * normal;
}
constexpr Vec3 Vec3::reflect(Vec3 normal) const { return *this - 2 * dot(*this, normal) * normal; }
constexpr Vec3 Vec3::refract(Vec3 normal, f64 eta) const {
f64 cos_theta = dot(-*this, normal);