initial commit

ScopEngine/Runtime/Includes/Graphics/Loaders/OBJ.h

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+#ifndef __SCOP_OBJ_LOADER__
+#define __SCOP_OBJ_LOADER__
+
+#include <map>
+#include <set>
+#include <string>
+#include <vector>
+#include <cstdint>
+#include <optional>
+#include <filesystem>
+
+#include <Maths/Vec2.h>
+#include <Maths/Vec3.h>
+#include <Maths/Vec4.h>
+
+namespace Scop
+{
+	struct ObjData
+	{
+		struct FaceVertex
+		{
+			FaceVertex() : v(-1), t(-1), n(-1) {}
+			std::int32_t v;
+			std::int32_t t;
+			std::int32_t n;
+
+			inline bool operator<(const FaceVertex& rhs) const
+			{
+				return (v < rhs.v) || (v == rhs.v && t < rhs.t ) || (v == rhs.v && t == rhs.t && n < rhs.n);
+			}
+			inline bool operator==(const FaceVertex& rhs) const
+			{
+				return (v == rhs.v && t == rhs.t && n == rhs.n);
+			}
+		};
+
+		using FaceList = std::pair<std::vector<FaceVertex>, std::vector<std::uint32_t>>;
+
+		std::vector<Vec4f> color;
+		std::vector<Vec3f> vertex;
+		std::vector<Vec3f> normal;
+		std::vector<Vec2f> tex_coord;
+
+		std::map<std::string, FaceList> faces;
+	};
+
+	struct ObjModel
+	{
+		std::vector<Vec4f> color;
+		std::vector<Vec3f> vertex;
+		std::vector<Vec3f> normal;
+		std::vector<Vec2f> tex_coord;
+
+		std::map<std::string, std::vector<std::uint32_t>> faces;
+	};
+
+	std::optional<ObjData> LoadObjFromFile(const std::filesystem::path& path);
+	void TesselateObjData(ObjData& data);
+	ObjModel ConvertObjDataToObjModel(const ObjData& data);
+
+	template<typename T>
+	inline std::istream& operator>>(std::istream& in, std::vector<T>& vec);
+
+	template<typename T>
+	inline std::istream& operator>>(std::istream& in, std::set<T>& vec);
+
+	inline std::istream& operator>>(std::istream& in, ObjData::FaceVertex& f);
+}
+
+#include <Graphics/Loaders/OBJ.inl>
+
+#endif