forked from Hartmut/paradiso
62 lines
No EOL
1.6 KiB
C++
62 lines
No EOL
1.6 KiB
C++
#ifndef PARADISO_VECTOR_HPP
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#define PARADISO_VECTOR_HPP
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#include "matrix.hpp"
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namespace paradiso {
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/**
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* Basic vector types used in pixwerx.
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*/
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template <typename T> struct Vector2 : Matrix<2, 1, T> {
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using base_type = Matrix<2, 1, T>;
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constexpr const T& x() const noexcept { return (*this)[0]; }
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constexpr T& x() { return (*this)[0]; }
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constexpr const T& y() const { return (*this)[1]; }
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constexpr T& y() { return (*this)[1]; }
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inline auto homogenous(T w = 1) const {
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return Matrix<3, 1, T>({x(), y(), w});
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}
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static T angle_between(const Vector2& a, const Vector2& b) {
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return std::acos(dot(a.normalized(), b.normalized()));
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}
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};
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template <typename T> struct Vector3 : Matrix<3, 1, T> {
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using base_type = Matrix<3, 1, T>;
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constexpr const T& x() const { return (*this)[0]; }
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constexpr T& x() { return (*this)[0]; }
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constexpr const T& y() const { return (*this)[1]; }
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constexpr T& y() { return (*this)[1]; }
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constexpr Vector2<T> xy() const noexcept { return {x(), y()}; }
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static constexpr Vector3 cross(const Vector3& lhs, const Vector3& rhs) {
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return vector3_({lhs[1] * rhs[2] - rhs[1] * lhs[2],
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lhs[2] * rhs[0] - rhs[2] * lhs[0],
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lhs[0] * rhs[1] - rhs[0] * lhs[1]});
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}
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static constexpr auto x_axis() noexcept {
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return Vector3::make(T{1}, T{0}, T{0});
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}
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static constexpr auto y_axis() noexcept {
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return Vector3::make(T{0}, T{1}, T{0});
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}
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static constexpr auto z_axis() noexcept {
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return Vector3<T>::make(T{0}, T{0}, T{1});
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}
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};
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}; // namespace paradiso
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#endif |