pub fn from_readable(mut readable: impl Read) -> Result<Self, Error> {
        let mut buf = [0u8; 4];
        readable.read_exact(&mut buf[0..1])?;
        let version = buf[0];
        if version != 1 {
            return Err(Error::new(ErrorKind::InvalidData, "wrong version"));
        }

        readable.read_exact(&mut buf)?;
        let nrows = u32::from_be_bytes(buf) as usize;

        readable.read_exact(&mut buf)?;
        let ncols = u32::from_be_bytes(buf) as usize;

        let size = nrows * ncols;

        readable.read_exact(&mut buf)?;
        let nforests = u32::from_be_bytes(buf) as usize;

        readable.read_exact(&mut buf)?;
        let forest_size = u32::from_be_bytes(buf) as usize;

        readable.read_exact(&mut buf)?;
        let tree_depth = u32::from_be_bytes(buf);

        readable.read_exact(&mut buf)?;
        let nfeatures = u32::from_be_bytes(buf) as usize;

        let leafs_count = 2u32.pow(tree_depth) as usize;
        let splits_count = leafs_count - 1;

        // dbg!(nrows, ncols, nforests, forest_size, tree_depth, nfeatures);
        let initial_shape: Vec<Point2<f32>> = shape_from_readable(readable.by_ref(), size)?
            .column_iter()
            .map(|col| Point2::new(col.x, col.y))
            .collect();

        let mut forests: Vec<Forest> = Vec::with_capacity(nforests);
        for _ in 0..nforests {
            let mut trees = Vec::with_capacity(forest_size);
            for _ in 0..forest_size {
                let mut nodes = Vec::with_capacity(splits_count);
                for _ in 0..splits_count {
                    nodes.push(ThresholdNode::from_readable(readable.by_ref())?);
                }

                let mut shifts = Vec::with_capacity(leafs_count);
                for _ in 0..leafs_count {
                    let shift: Vec<Vector2<f32>> = shape_from_readable(readable.by_ref(), size)?
                        .column_iter()
                        .map(|col| Vector2::new(col.x, col.y))
                        .collect();
                    shifts.push(shift);
                }

                trees.push(Tree { nodes, shifts });
            }

            let mut anchors = Vec::with_capacity(nfeatures);
            for _ in 0..nfeatures {
                readable.read_exact(&mut buf)?;
                anchors.push(u32::from_be_bytes(buf) as usize);
            }

            let mut deltas = Vec::with_capacity(nfeatures);
            for _ in 0..nfeatures {
                readable.read_exact(&mut buf)?;
                let x = f32::from_be_bytes(buf);
                readable.read_exact(&mut buf)?;
                let y = f32::from_be_bytes(buf);
                deltas.push(Vector2::new(x, y));
            }

            forests.push(Forest {
                trees,
                anchors,
                deltas,
            });
        }

        Ok(Self {
            initial_shape,
            forests,
            _depth: tree_depth as usize,
            _dsize: splits_count,
            _features: nfeatures,
        })
    }
/// Create a shaper object from a readable source.
Create a shaper object from a readable source.
Create a shaper object from a readable source .
pub fn from_readable(mut readable: impl Read) -> Result<Self, Error> {
        let mut buf = [0u8; 4];
        readable.read_exact(&mut buf[0..1])?;
        let version = buf[0];
        if version != 1 {
            return Err(Error::new(ErrorKind::InvalidData, "wrong version"));
        }
        readable.read_exact(&mut buf)?;
        let nrows = u32::from_be_bytes(buf) as usize;
        readable.read_exact(&mut buf)?;
        let ncols = u32::from_be_bytes(buf) as usize;
        let size = nrows * ncols;
        readable.read_exact(&mut buf)?;
        let nforests = u32::from_be_bytes(buf) as usize;
        readable.read_exact(&mut buf)?;
        let forest_size = u32::from_be_bytes(buf) as usize;
        readable.read_exact(&mut buf)?;
        let tree_depth = u32::from_be_bytes(buf);
        readable.read_exact(&mut buf)?;
        let nfeatures = u32::from_be_bytes(buf) as usize;
        let leafs_count = 2u32.pow(tree_depth) as usize;
        let splits_count = leafs_count - 1;
        // dbg!(nrows, ncols, nforests, forest_size, tree_depth, nfeatures);
        let initial_shape: Vec<Point2<f32>> = shape_from_readable(readable.by_ref(), size)?
            .column_iter()
            .map(|col| Point2::new(col.x, col.y))
            .collect();
        let mut forests: Vec<Forest> = Vec::with_capacity(nforests);
        for _ in 0..nforests {
            let mut trees = Vec::with_capacity(forest_size);
            for _ in 0..forest_size {
                let mut nodes = Vec::with_capacity(splits_count);
                for _ in 0..splits_count {
                    nodes.push(ThresholdNode::from_readable(readable.by_ref())?);
                }
                let mut shifts = Vec::with_capacity(leafs_count);
                for _ in 0..leafs_count {
                    let shift: Vec<Vector2<f32>> = shape_from_readable(readable.by_ref(), size)?
                        .column_iter()
                        .map(|col| Vector2::new(col.x, col.y))
                        .collect();
                    shifts.push(shift);
                }
                trees.push(Tree { nodes, shifts });
            }
            let mut anchors = Vec::with_capacity(nfeatures);
            for _ in 0..nfeatures {
                readable.read_exact(&mut buf)?;
                anchors.push(u32::from_be_bytes(buf) as usize);
            }
            let mut deltas = Vec::with_capacity(nfeatures);
            for _ in 0..nfeatures {
                readable.read_exact(&mut buf)?;
                let x = f32::from_be_bytes(buf);
                readable.read_exact(&mut buf)?;
                let y = f32::from_be_bytes(buf);
                deltas.push(Vector2::new(x, y));
            }
            forests.push(Forest {
                trees,
                anchors,
                deltas,
            });
        }
        Ok(Self {
            initial_shape,
            forests,
            _depth: tree_depth as usize,
            _dsize: splits_count,
            _features: nfeatures,
        })
    }
pub fn from_readable ( mut readable : impl Read ) -> Result < Self , Error > { let mut buf = [ 0u8 ; 4 ] ; readable . read_exact ( & mut buf [ 0 .. 1 ] ) ? ; let version = buf [ 0 ] ; if version != 1 { return Err ( Error :: new ( ErrorKind :: InvalidData , " " ) ) ; } readable . read_exact ( & mut buf ) ? ; let nrows = u32 :: from_be_bytes ( buf ) as usize ; readable . read_exact ( & mut buf ) ? ; let ncols = u32 :: from_be_bytes ( buf ) as usize ; let size = nrows * ncols ; readable . read_exact ( & mut buf ) ? ; let nforests = u32 :: from_be_bytes ( buf ) as usize ; readable . read_exact ( & mut buf ) ? ; let forest_size = u32 :: from_be_bytes ( buf ) as usize ; readable . read_exact ( & mut buf ) ? ; let tree_depth = u32 :: from_be_bytes ( buf ) ; readable . read_exact ( & mut buf ) ? ; let nfeatures = u32 :: from_be_bytes ( buf ) as usize ; let leafs_count = 2u32 . pow ( tree_depth ) as usize ; let splits_count = leafs_count - 1 ; // dbg!(nrows, ncols, nforests, forest_size, tree_depth, nfeatures); let initial_shape : Vec < Point2 < f32 > > = shape_from_readable ( readable . by_ref ( ) , size ) ? . column_iter ( ) . map ( | col | Point2 :: new ( col . x , col . y ) ) . collect ( ) ; let mut forests : Vec < Forest > = Vec :: with_capacity ( nforests ) ; for _ in 0 .. nforests { let mut trees = Vec :: with_capacity ( forest_size ) ; for _ in 0 .. forest_size { let mut nodes = Vec :: with_capacity ( splits_count ) ; for _ in 0 .. splits_count { nodes . push ( ThresholdNode :: from_readable ( readable . by_ref ( ) ) ? ) ; } let mut shifts = Vec :: with_capacity ( leafs_count ) ; for _ in 0 .. leafs_count { let shift : Vec < Vector2 < f32 > > = shape_from_readable ( readable . by_ref ( ) , size ) ? . column_iter ( ) . map ( | col | Vector2 :: new ( col . x , col . y ) ) . collect ( ) ; shifts . push ( shift ) ; } trees . push ( Tree { nodes , shifts } ) ; } let mut anchors = Vec :: with_capacity ( nfeatures ) ; for _ in 0 .. nfeatures { readable . read_exact ( & mut buf ) ? ; anchors . push ( u32 :: from_be_bytes ( buf ) as usize ) ; } let mut deltas = Vec :: with_capacity ( nfeatures ) ; for _ in 0 .. nfeatures { readable . read_exact ( & mut buf ) ? ; let x = f32 :: from_be_bytes ( buf ) ; readable . read_exact ( & mut buf ) ? ; let y = f32 :: from_be_bytes ( buf ) ; deltas . push ( Vector2 :: new ( x , y ) ) ; } forests . push ( Forest { trees , anchors , deltas , } ) ; } Ok ( Self { initial_shape , forests , _depth : tree_depth as usize , _dsize : splits_count , _features : nfeatures , } ) }
Create a shaper object from a readable source.
Create a shaper object from a readable source .
readable
impl Read
readable
impl Read