fCraft.Drawing.Fill3DDrawOperation.Prepare C# (CSharp) Method

        public override bool Prepare( Vector3I[] marks ) {
            if( marks == null ) throw new ArgumentNullException( "marks" );
            if( marks.Length < 1 ) throw new ArgumentException( "At least one mark needed.", "marks" );

            Marks = marks;
            Origin = marks[0];
            SourceBlock = Map.GetBlock( Origin );

            if( Player.Info.Rank.DrawLimit == 0 ) {
                // Unlimited!
                Bounds = Map.Bounds;

            } else {
                // Our fill limit is cube root of DrawLimit
                double pow = Math.Pow( Player.Info.Rank.DrawLimit, 1/3d );
                int maxLimit = (int)Math.Ceiling( pow / 2 );

                // Compute the largest possible extent
                if( maxLimit < 1 || maxLimit > 2048 ) maxLimit = 2048;
                Vector3I maxDelta = new Vector3I( maxLimit, maxLimit, maxLimit );
                Bounds = new BoundingBox( Origin - maxDelta, Origin + maxDelta );
                // Clip bounds to the map, used to limit fill extent
                Bounds = Bounds.GetIntersection( Map.Bounds );
            }

            // Set everything up for filling
            Coords = Origin;

            StartTime = DateTime.UtcNow;
            Context = BlockChangeContext.Drawn | BlockChangeContext.Filled;
            BlocksTotalEstimate = Bounds.Volume;

            coordEnumerator = BlockEnumerator().GetEnumerator();

            if( Brush == null ) throw new NullReferenceException( Name + ": Brush not set" );
            return Brush.Begin( Player, this );
        }