CS123MeshObjLoader.h

Go to the documentation of this file.

/*
 *
 * This class will load meshes in standard obj format and 
 * provides an interface to get at the polygons in the file.
 *
 * @author nli
 */

#ifndef __CS123_MESH_OBJ_LOADER__
#define __CS123_MESH_OBJ_LOADER__

/** Includes */
#include <vector>

//! Simple Struct to store uv's
struct CS123MeshUV
{
    float u, v;
    CS123MeshUV(float u, float v);
};

//! Struct to contain 3 floats
struct float3
{
    float x, y, z;
};

//! Generic Polygon Struct.
/*!- Polygon will be stored in counter clockwise order
 * There will be in normal and uv for each vertex. */
struct CS123Polygon
{
    float* vertices;
    float* normals;
    CS123MeshUV* uvs;
    unsigned int num_vertices;
};

//! Utility class that will parse and load mesh files in standard obj format
class CS123MeshObjLoader
{
    public:
   //! Constructor for the mesh loader.  Initializes values.
   CS123MeshObjLoader();
   //! Clean up memory resources
   ~CS123MeshObjLoader();

   //! Returns true if mesh loaded successfully and false otherwise */
   bool loadMesh(const char* filename);

   //! Returns a list of polygons.
   /*! On return, numPolygons will store the 
    *  number of polygons in the list.  You are responsible for cleaning
    *  up the memory associated with the array of polygons.  (you must
    *  clean up the array and each of the arrays within the struct) */
   CS123Polygon* getPolygons(unsigned int& numPolygons);

    private:
   CS123Polygon* m_polygons;
   unsigned int m_numPolygons;
   unsigned int m_size;
   bool m_cleanMemory;

   std::vector<float3> m_vertexList;
   std::vector<CS123MeshUV> m_uvList;
   std::vector<float3> m_normalList;
};

#endif