ST_FlipCoords #12
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ST_FlipCoords #12
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kylebarron
commented
Sep 16, 2025
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| fn flip_interleaved_coords(coords: &InterleavedCoordBuffer) -> InterleavedCoordBuffer { | ||
| let mut builder = InterleavedCoordBufferBuilder::with_capacity(coords.len(), coords.dim()); | ||
| let raw_coord_buffer = coords.coords(); | ||
| for coord_idx in 0..coords.len() { | ||
| match coords.dim() { | ||
| Dimension::XY => { | ||
| let x = raw_coord_buffer.get(coord_idx * 2).unwrap(); | ||
| let y = raw_coord_buffer.get(coord_idx * 2 + 1).unwrap(); | ||
| let flipped = geo::Coord { x: *y, y: *x }; | ||
| builder.push_coord(&flipped); | ||
| } | ||
| Dimension::XYZ => { | ||
| let x = raw_coord_buffer.get(coord_idx * 3).unwrap(); | ||
| let y = raw_coord_buffer.get(coord_idx * 3 + 1).unwrap(); | ||
| let z = raw_coord_buffer.get(coord_idx * 3 + 2).unwrap(); | ||
| let flipped = wkt::types::Coord { | ||
| x: *y, | ||
| y: *x, | ||
| z: Some(*z), | ||
| m: None, | ||
| }; | ||
| builder.push_coord(&flipped); | ||
| } | ||
| Dimension::XYM => { | ||
| let x = raw_coord_buffer.get(coord_idx * 3).unwrap(); | ||
| let y = raw_coord_buffer.get(coord_idx * 3 + 1).unwrap(); | ||
| let m = raw_coord_buffer.get(coord_idx * 3 + 2).unwrap(); | ||
| let flipped = wkt::types::Coord { | ||
| x: *y, | ||
| y: *x, | ||
| z: None, | ||
| m: Some(*m), | ||
| }; | ||
| builder.push_coord(&flipped); | ||
| } | ||
| Dimension::XYZM => { | ||
| let x = raw_coord_buffer.get(coord_idx * 4).unwrap(); | ||
| let y = raw_coord_buffer.get(coord_idx * 4 + 1).unwrap(); | ||
| let z = raw_coord_buffer.get(coord_idx * 4 + 2).unwrap(); | ||
| let m = raw_coord_buffer.get(coord_idx * 4 + 3).unwrap(); | ||
| let flipped = wkt::types::Coord { | ||
| x: *y, | ||
| y: *x, | ||
| z: Some(*z), | ||
| m: Some(*m), | ||
| }; | ||
| builder.push_coord(&flipped); | ||
| } | ||
| } | ||
| } | ||
| builder.finish() | ||
| } |
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This should use the newly-public accessors for coordinates in geoarrow/geoarrow-rs#1332
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Still a draft because I need to iterate through the geometry objects yielded by wkb/wkt