MarchingCubes.h

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//
// Linearize OS specific macros
//
#if defined(__unix__) || defined(__linux__) || defined(__APPLE__) || defined(__MACH__)
#define OS_UNIX
#endif

#if defined(__APPLE__) || defined(__MACH__)
#define OS_OSX
#endif

#if defined(_MSC_VER)
#define OS_WINDOWS
#endif

//
// API export macro
//
#if defined(OS_OSX)
#define API __attribute__((visibility("default")))
#elif defined(OS_WINDOWS)
#define API __declspec(dllexport)
#else
#define API
#endif


typedef struct {
    int x;
    int y;
    int z;
} int3;

typedef struct {
    float x;
    float y;
    float z;
} float3;
 

typedef struct {
    int3 p[8];
    float3 n[8];
    float val[8];
} GRIDCELL;
 
typedef struct {
    float3 p[3];         /* Vertices */
    float3 c;            /* Centroid */
    float3 n[3];         /* Normal   */
} TRIANGLE;
 
#define ABS(x) (x < 0 ? -(x) : (x))
 
// Prototypes
int PolygoniseCube(GRIDCELL, float, TRIANGLE *);
float3 VertexInterp(float, int3, int3, float, float);
TRIANGLE *marchingCubes(const float *data, const int3 gridDim, int *nbTri);


//Unity calls these functions 
extern "C" {
    API void ComputeMesh(const float *gridVal, const int sizeX, const int sizeY, const int sizeZ, const float isoValue,
         int *vertnumber, int *facenumber);
    API float* getVertices();
    API int* getTriangles();
    API void freeMeshData();
}