float *devPtr; //this is device pointer that holds an array of floats
//6 floats represent a vertex, array size is vertsCount*6*sizeof(float).
//format is [v0x, v0y, v0z, n0x, n0y, n0z, v1x, v1y, v1z, n1x, ...]

typedef thrust::tuple<float, float, float, float, float, float> MCVertex;

thrust::device_vector<MCVertex> inputVertices(vertsCount);

//copy from *devPtr to inputVertices.

//use something like unique to get rid of redundancies.
thrust::unique(inputVertices.begin(), inputVertices.end());