#include "mesh.hpp"
#include <assimp/Importer.hpp>
#include <assimp/scene.h>
#include <assimp/postprocess.h>
#include "constraints.hpp"


Mesh::Mesh(const std::string &fileName) {
	Assimp::Importer importer;
	auto scene = importer.ReadFile(fileName, aiProcess_Triangulate);

	auto mesh = scene->mMeshes[0];

	for (size_t i = 0; i < mesh->mNumVertices; i++){
		glm::vec3 pos = *reinterpret_cast<glm::vec3*>(&mesh->mVertices[i]);
		glm::vec3 color = {0, 0, 0};
		glm::vec2 uv = {0, 0};
		if (mesh->mNumUVComponents[0] == 2)
			uv = *reinterpret_cast<glm::vec2*>(&mesh->mTextureCoords[0][i]);
		glm::vec3 normal = {0, 0, 0};
		if (mesh->mNormals != nullptr)
			normal = *reinterpret_cast<glm::vec3*>(&mesh->mNormals[i]);
		vertices.push_back({pos, color, uv, normal});
	}

	for (size_t i = 0; i < mesh->mNumFaces; i++){
		faces.push_back(*reinterpret_cast<Face*>(mesh->mFaces[i].mIndices));
	}

}