/** @file
 * Original ReactPhysics3D C++ library by Daniel Chappuis <http://www.reactphysics3d.com/> This code is re-licensed with permission from ReactPhysics3D author.
 * @author Daniel CHAPPUIS
 * @author Edouard DUPIN
 * @copyright 2010-2016, Daniel Chappuis
 * @copyright 2017, Edouard DUPIN
 * @license MPL v2.0 (see license file)
 */
#pragma once

#include <ephysics/configuration.hpp>
#include <etk/math/Vector3D.hpp>

namespace ephysics {
	class Triangle {
		public:
			vec3 value[3];
			vec3 operator[] (sizet id) {
				return value[id];
			}
	};
	/**
	 * This class is used to describe the vertices and faces of a triangular mesh.
	 * A TriangleVertexArray represents a continuous array of vertices and indexes
	 * of a triangular mesh. When you create a TriangleVertexArray, no data is copied
	 * into the array. It only stores pointer to the data. The purpose is to allow
	 * the user to share vertices data between the physics engine and the rendering
	 * part. Therefore, make sure that the data pointed by a TriangleVertexArray
	 * remains valid during the TriangleVertexArray life.
	 */
	class TriangleVertexArray {
		protected:
			etk::Vector<vec3> this.vertices; //!< Vertice list
			etk::Vector<int> this.triangles; //!< List of triangle (3 pos for each triangle)
		public:
			/**
			 * @brief Constructor
			 * @param[in] vertices List Of all vertices
			 * @param[in] triangles List of all linked points
			 */
			TriangleVertexArray( etk::Vector<vec3> vertices,
			                     etk::Vector<int> triangles);
			/**
			 * @brief Get the number of vertices
			 * @return Number of vertices
			 */
			sizet getNbVertices() ;
			/**
			 * @brief Get the number of triangle
			 * @return Number of triangles
			 */
			sizet getNbTriangles() ;
			/**
			 * @brief Get The table of the vertices
			 * @return reference on the vertices
			 */
			 etk::Vector<vec3> getVertices() ;
			/**
			 * @brief Get The table of the triangle indice
			 * @return reference on the triangle indice
			 */
			 etk::Vector<int> getIndices() ;
			/**
			 * @brief Get a triangle at the specific ID
			 * @return Buffer of 3 points
			 */
			ephysics::Triangle getTriangle(int id) ;
	};


}