#pragma once

class Tesselator
{
public:
	typedef std::vector<Vec3> VertexList;
	typedef std::unordered_map<Vec3, size_t> VertexIndexMap;
	typedef std::pair<Vec3, const texinfo_t*> VertexTexturePair;
	typedef std::map<VertexTexturePair, Vec3> VertexUVMap;

	struct Polygon
	{
		const texinfo_t* texinfo;
		std::vector<size_t> indices;
	};

	Tesselator(const world_t* world) : world(world)
	{
	}

	const VertexList& getVertices() const { return vertices; }
	const VertexIndexMap& getVertexIndices() const { return vertexIndices; }
	const VertexUVMap& getVertexUVs() const { return vertexUVs; }

	std::vector<Polygon> tesselateFace(const face_t* face);

private:
	const world_t* world;

	VertexList vertices;
	VertexIndexMap vertexIndices;
	VertexUVMap vertexUVs;
};