b4l commented on code in PR #471: URL: https://github.com/apache/sedona-db/pull/471#discussion_r2693476206
########## rust/sedona-pointcloud/src/laz/builder.rs: ########## @@ -0,0 +1,569 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +use std::{fmt::Debug, sync::Arc}; + +use arrow_array::{ + builder::{ + ArrayBuilder, BooleanBuilder, FixedSizeBinaryBuilder, Float32Builder, Float64Builder, + Int16Builder, Int32Builder, Int64Builder, Int8Builder, UInt16Builder, UInt32Builder, + UInt64Builder, UInt8Builder, + }, + Array, ArrayRef, BooleanArray, FixedSizeBinaryArray, Float32Array, Float64Array, StructArray, + UInt16Array, UInt8Array, +}; +use arrow_buffer::ScalarBuffer; +use arrow_schema::DataType; +use geoarrow_array::{ + array::{CoordBuffer, PointArray, SeparatedCoordBuffer}, + builder::WkbBuilder, + capacity::WkbCapacity, + GeoArrowArray, +}; +use geoarrow_schema::{Dimension, WkbType}; +use las::{Header, Point}; + +use crate::laz::{ + metadata::ExtraAttribute, + options::{LasExtraBytes, LasPointEncoding}, + schema::schema_from_header, +}; + +#[derive(Debug)] +pub struct RowBuilder { + x: Float64Builder, + y: Float64Builder, + z: Float64Builder, + intensity: UInt16Builder, + return_number: UInt8Builder, + number_of_returns: UInt8Builder, + is_synthetic: BooleanBuilder, + is_key_point: BooleanBuilder, + is_withheld: BooleanBuilder, + is_overlap: BooleanBuilder, + scanner_channel: UInt8Builder, + scan_direction: UInt8Builder, + is_edge_of_flight_line: BooleanBuilder, + classification: UInt8Builder, + user_data: UInt8Builder, + scan_angle: Float32Builder, + point_source_id: UInt16Builder, + gps_time: Float64Builder, + red: UInt16Builder, + green: UInt16Builder, + blue: UInt16Builder, + nir: UInt16Builder, + extra: FixedSizeBinaryBuilder, + header: Arc<Header>, + point_encoding: LasPointEncoding, + extra_bytes: LasExtraBytes, + extra_attributes: Arc<Vec<ExtraAttribute>>, +} + +impl RowBuilder { + pub fn new(capacity: usize, header: Arc<Header>) -> Self { + Self { + x: Float64Array::builder(capacity), + y: Float64Array::builder(capacity), + z: Float64Array::builder(capacity), + intensity: UInt16Array::builder(capacity), + return_number: UInt8Array::builder(capacity), + number_of_returns: UInt8Array::builder(capacity), + is_synthetic: BooleanArray::builder(capacity), + is_key_point: BooleanArray::builder(capacity), + is_withheld: BooleanArray::builder(capacity), + is_overlap: BooleanArray::builder(capacity), + scanner_channel: UInt8Array::builder(capacity), + scan_direction: UInt8Array::builder(capacity), + is_edge_of_flight_line: BooleanArray::builder(capacity), + classification: UInt8Array::builder(capacity), + user_data: UInt8Array::builder(capacity), + scan_angle: Float32Array::builder(capacity), + point_source_id: UInt16Array::builder(capacity), + gps_time: Float64Array::builder(capacity), + red: UInt16Array::builder(capacity), + green: UInt16Array::builder(capacity), + blue: UInt16Array::builder(capacity), + nir: UInt16Array::builder(capacity), + extra: FixedSizeBinaryBuilder::with_capacity( + capacity, + header.point_format().extra_bytes as i32, + ), + + header, + point_encoding: Default::default(), + extra_bytes: Default::default(), + extra_attributes: Arc::new(Vec::new()), + } + } + + pub fn with_point_encoding(mut self, point_encoding: LasPointEncoding) -> Self { + self.point_encoding = point_encoding; + self + } + + pub fn with_extra_attributes( + mut self, + attributes: Arc<Vec<ExtraAttribute>>, + extra_bytes: LasExtraBytes, + ) -> Self { + self.extra_attributes = attributes; + self.extra_bytes = extra_bytes; + self + } + + pub fn append(&mut self, p: Point) { + self.x.append_value(p.x); + self.y.append_value(p.y); + self.z.append_value(p.z); + self.intensity.append_option(Some(p.intensity)); + self.return_number.append_value(p.return_number); + self.number_of_returns.append_value(p.number_of_returns); + self.is_synthetic.append_value(p.is_synthetic); + self.is_key_point.append_value(p.is_key_point); + self.is_withheld.append_value(p.is_withheld); + self.is_overlap.append_value(p.is_overlap); + self.scanner_channel.append_value(p.scanner_channel); + self.scan_direction.append_value(p.scan_direction as u8); + self.is_edge_of_flight_line + .append_value(p.is_edge_of_flight_line); + self.classification.append_value(u8::from(p.classification)); + self.user_data.append_value(p.user_data); + self.scan_angle.append_value(p.scan_angle); + self.point_source_id.append_value(p.point_source_id); + if self.header.point_format().has_gps_time { + self.gps_time.append_value(p.gps_time.unwrap()); + } + if self.header.point_format().has_color { + let color = p.color.unwrap(); + self.red.append_value(color.red); + self.green.append_value(color.green); + self.blue.append_value(color.blue); + } + if self.header.point_format().has_nir { + self.nir.append_value(p.nir.unwrap()); + } + if self.header.point_format().extra_bytes > 0 { + self.extra.append_value(p.extra_bytes).unwrap(); + } + } + + /// Note: returns StructArray to allow nesting within another array if desired + pub fn finish(&mut self) -> StructArray { + let schema = schema_from_header(&self.header, self.point_encoding, self.extra_bytes); + + let mut columns = match self.point_encoding { + LasPointEncoding::Plain => vec![ + Arc::new(self.x.finish()) as ArrayRef, + Arc::new(self.y.finish()) as ArrayRef, + Arc::new(self.z.finish()) as ArrayRef, + ], + LasPointEncoding::Wkb => { + const POINT_SIZE: usize = 29; + + let n: usize = self.x.len(); + + let capacity = WkbCapacity::new(POINT_SIZE * n, 4 * n); + let mut builder = WkbBuilder::<i32>::with_capacity(WkbType::default(), capacity); + + let x = self.x.finish(); + let y = self.y.finish(); + let z = self.z.finish(); + + let mut wkb_bytes = [0_u8; POINT_SIZE]; + wkb_bytes[0] = 0x01; // Little-endian + wkb_bytes[1..5].copy_from_slice(&[0xE9, 0x03, 0x00, 0x00]); // Point Z type (1001) + + for i in 0..n { + let x = unsafe { x.value_unchecked(i) }; + let y = unsafe { y.value_unchecked(i) }; + let z = unsafe { z.value_unchecked(i) }; + + wkb_bytes[5..13].copy_from_slice(x.to_le_bytes().as_slice()); + wkb_bytes[13..21].copy_from_slice(y.to_le_bytes().as_slice()); + wkb_bytes[21..29].copy_from_slice(z.to_le_bytes().as_slice()); + + unsafe { builder.push_wkb_unchecked(Some(&wkb_bytes)) }; + } Review Comment: Done in https://github.com/apache/sedona-db/pull/471/commits/a3211f8fd2e4d4ac662cb1adec5d83f15284b5ec -- This is an automated message from the Apache Git Service. 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