/*===============================================================================
Copyright (c) 2015-2016,2018 PTC Inc. All Rights Reserved.

Copyright (c) 2014 Qualcomm Connected Experiences, Inc. All Rights Reserved.

Vuforia is a trademark of PTC Inc., registered in the United States and other 
countries.

\file
    Mesh.h

\brief
    Header file for Mesh class.
===============================================================================*/

#ifndef _VUFORIA_MESH_H_
#define _VUFORIA_MESH_H_

// Include files
#include <Vuforia/System.h>
#include <Vuforia/Vectors.h>

namespace Vuforia
{

/// A triangular mesh with support for optional vertex positions, UVs, and normals.
class VUFORIA_API Mesh
{
public:

    /// Get the number of vertices.
    virtual int getNumVertices() const = 0;

    /// Returns true if the mesh contains positions.
    virtual bool hasPositions() const = 0;

    /// Provides access to the array of positions.
    virtual const Vec3F* getPositions() const = 0;
    
    /// Provides access to the array of positions.
    virtual const float* getPositionCoordinates() const = 0;

    /// Returns true if the mesh contains surface normals.
    virtual bool hasNormals() const = 0;

    /// Provides access to the array of surface normals.
    virtual const Vec3F* getNormals() const = 0;

    /// Provides access to the array of surface normals.
    virtual const float* getNormalCoordinates() const = 0;

    /// Returns true if the mesh contains texture coordinates.
    virtual bool hasUVs() const = 0;

    /// Provides access to the array of texture coordinates.
    virtual const Vec2F* getUVs() const = 0;

    /// Provides access to the array of texture coordinates.
    virtual const float* getUVCoordinates() const = 0;

    /// Returns the number of triangles.
    virtual int getNumTriangles() const = 0;

    /// Provides access to the array triangle indices.
    virtual const unsigned short* getTriangles() const = 0;
};

} // namespace Vuforia

#endif //_VUFORIA_MESH_H_