SEToolbox.Models.StructureVoxelModel.RotateAsteroid C# (CSharp) Method

        public void RotateAsteroid(VRageMath.Quaternion quaternion)
        {
            var sourceFile = SourceVoxelFilepath ?? VoxelFilepath;

            var asteroid = new MyVoxelMap();
            asteroid.Load(sourceFile, SpaceEngineersCore.Resources.GetDefaultMaterialName(), true);

            var newAsteroid = new MyVoxelMap();
            var transSize = Vector3I.Transform(asteroid.Size, quaternion);
            var newSize = Vector3I.Abs(transSize);
            newAsteroid.Init(Vector3D.Zero, newSize, SpaceEngineersCore.Resources.GetDefaultMaterialName());

            Vector3I coords;
            for (coords.Z = 0; coords.Z < asteroid.Size.Z; coords.Z++)
            {
                for (coords.Y = 0; coords.Y < asteroid.Size.Y; coords.Y++)
                {
                    for (coords.X = 0; coords.X < asteroid.Size.X; coords.X++)
                    {
                        byte volume = 0xff;
                        string cellMaterial;

                        asteroid.GetVoxelMaterialContent(ref coords, out cellMaterial, out volume);

                        var newCoord = Vector3I.Transform(coords, quaternion);
                        // readjust the points, as rotation occurs arround 0,0,0.
                        newCoord.X = newCoord.X < 0 ? newCoord.X - transSize.X : newCoord.X;
                        newCoord.Y = newCoord.Y < 0 ? newCoord.Y - transSize.Y : newCoord.Y;
                        newCoord.Z = newCoord.Z < 0 ? newCoord.Z - transSize.Z : newCoord.Z;
                        newAsteroid.SetVoxelContent(volume, ref newCoord);
                        newAsteroid.SetVoxelMaterialAndIndestructibleContent(cellMaterial, 0xff, ref newCoord);
                    }
                }
            }
            
            var tempfilename = TempfileUtil.NewFilename(MyVoxelMap.V2FileExtension);
            newAsteroid.Save(tempfilename);

            SourceVoxelFilepath = tempfilename;
        }