gistfile1.cpp

    size_t i;
    for(i = 0; i < facesCount; ++i) {
        memcpy(&verticiesPrepared[i*9 + 0], &verticies[(faces[i*9 + 0] - 1)*3 + 0], 3*sizeof(double));
        memcpy(&verticiesPrepared[i*9 + 3], &verticies[(faces[i*9 + 3] - 1)*3 + 0], 3*sizeof(double));
        memcpy(&verticiesPrepared[i*9 + 6], &verticies[(faces[i*9 + 6] - 1)*3 + 0], 3*sizeof(double));

        memcpy(&textureCoordinatesPrepared[i*6 + 0], &textureCoordinates[(faces[i*9 + 1] - 1)*2 + 0], 2*sizeof(double));
        memcpy(&textureCoordinatesPrepared[i*6 + 2], &textureCoordinates[(faces[i*9 + 4] - 1)*2 + 0], 2*sizeof(double));
        memcpy(&textureCoordinatesPrepared[i*6 + 4], &textureCoordinates[(faces[i*9 + 7] - 1)*2 + 0], 2*sizeof(double));

        memcpy(&normalsPrepared[i*9 + 0], &normals[(faces[i*9 + 2] - 1)*3 + 0], 3*sizeof(double));
        memcpy(&normalsPrepared[i*9 + 3], &normals[(faces[i*9 + 5] - 1)*3 + 0], 3*sizeof(double));
        memcpy(&normalsPrepared[i*9 + 6], &normals[(faces[i*9 + 8] - 1)*3 + 0], 3*sizeof(double));
    }