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Added some basic geometry functionality (only tangent generation for now).

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Patrick
2023-12-07 17:16:08 +01:00
parent b89f19ed98
commit 1d8ef0bac8
3 changed files with 242 additions and 0 deletions
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103
source/mijin/geo/geometry_traits.hpp Normal file
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#pragma once
#if !defined(MIJIN_GEO_GEOMETRY_TRAITS_HPP_INCLUDED)
#define MIJIN_GEO_GEOMETRY_TRAITS_HPP_INCLUDED 1
#include <concepts>
#include <ranges>
namespace mijin
{
template<typename T>
struct Vector2Traits;
template<typename T>
concept Vector2 = requires(const std::decay_t<T> constObject, std::decay_t<T> nonConstObject)
{
{ mijin::Vector2Traits<std::decay_t<T>>{}.getX(constObject) } -> std::convertible_to<float>;
{ mijin::Vector2Traits<std::decay_t<T>>{}.getY(constObject) } -> std::convertible_to<float>;
{ mijin::Vector2Traits<std::decay_t<T>>{}.setX(nonConstObject, 0.f) };
{ mijin::Vector2Traits<std::decay_t<T>>{}.setY(nonConstObject, 0.f) };
};
template<typename T>
struct Vector3Traits;
template<typename T>
concept Vector3 = requires(const std::decay_t<T> constObject, std::decay_t<T> nonConstObject)
{
{ mijin::Vector3Traits<std::decay_t<T>>{}.getX(constObject) } -> std::convertible_to<float>;
{ mijin::Vector3Traits<std::decay_t<T>>{}.getY(constObject) } -> std::convertible_to<float>;
{ mijin::Vector3Traits<std::decay_t<T>>{}.getZ(constObject) } -> std::convertible_to<float>;
{ mijin::Vector3Traits<std::decay_t<T>>{}.setX(nonConstObject, 0.f) };
{ mijin::Vector3Traits<std::decay_t<T>>{}.setY(nonConstObject, 0.f) };
{ mijin::Vector3Traits<std::decay_t<T>>{}.setZ(nonConstObject, 0.f) };
};
template<typename T>
concept Index = std::convertible_to<T, std::size_t>;
template<typename T>
concept Vector2Iterator = requires(T object)
{
{ std::iterator_traits<T>::value_type } -> Vector2;
};
template<typename T>
concept Vector3Iterator = requires(T object)
{
{ std::iterator_traits<T>::value_type } -> Vector3;
};
template<typename T>
concept Vector2Range = std::ranges::random_access_range<T> && Vector2<std::ranges::range_value_t<T>>;
template<typename T>
concept Vector3Range = std::ranges::random_access_range<T> && Vector3<std::ranges::range_value_t<T>>;
template<typename T>
concept IndexRange = std::ranges::random_access_range<T> && Index<std::ranges::range_value_t<T>>;
template<typename T>
struct Mesh3DTraits;
template<typename T>
concept Mesh3D = requires(const T constObject, T nonConstObject, mijin::Mesh3DTraits<T>::index_t index, mijin::Mesh3DTraits<T>::vector3_t vec3Value)
{
{ typename mijin::Mesh3DTraits<T>::index_t() } -> Index;
{ typename mijin::Mesh3DTraits<T>::vector3_t() } -> Vector3;
{ mijin::Mesh3DTraits<T>{}.getNumFaces(constObject) } -> std::convertible_to<std::size_t>;
{ mijin::Mesh3DTraits<T>{}.getNumVertices(constObject) } -> std::convertible_to<std::size_t>;
{ mijin::Mesh3DTraits<T>{}.getFaceNumVertices(constObject, index) } -> std::convertible_to<std::size_t>;
{ mijin::Mesh3DTraits<T>{}.getPosition(constObject, index, index) } -> Vector3;
{ mijin::Mesh3DTraits<T>{}.setPosition(nonConstObject, index, index, vec3Value) };
};
template<typename T>
concept Mesh3DWithNormals = Mesh3D<T> && requires(const T constObject, T nonConstObject, mijin::Mesh3DTraits<T>::index_t index, mijin::Mesh3DTraits<T>::vector3_t vec3Value)
{
{ mijin::Mesh3DTraits<T>{}.getNormal(constObject, index, index) } -> Vector3;
{ mijin::Mesh3DTraits<T>{}.setNormal(nonConstObject, index, index, vec3Value) };
};
template<typename T>
concept Mesh3DWithTangents = Mesh3D<T> && requires(const T constObject, T nonConstObject, mijin::Mesh3DTraits<T>::index_t index, mijin::Mesh3DTraits<T>::vector3_t vec3Value)
{
{ mijin::Mesh3DTraits<T>{}.getTangent(constObject, index, index) } -> Vector3;
{ mijin::Mesh3DTraits<T>{}.setTangent(nonConstObject, index, index, vec3Value) };
};
template<typename T>
concept Mesh3DWithTexCoords = Mesh3D<T> && requires(const T constObject, T nonConstObject, mijin::Mesh3DTraits<T>::index_t index, mijin::Mesh3DTraits<T>::vector2_t vec2Value)
{
{ mijin::Mesh3DTraits<T>{}.getTexCoord(constObject, index, index) } -> Vector2;
{ mijin::Mesh3DTraits<T>{}.setTexCoord(nonConstObject, index, index, vec2Value) };
};
template<typename T>
concept FullMesh3D = Mesh3DWithNormals<T> && Mesh3DWithTangents<T> && Mesh3DWithTexCoords<T>;
}
#endif // MIJIN_GEO_GEOMETRY_TRAITS_HPP_INCLUDED