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update readme to include developer build instructions
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hobu committed Oct 4, 2024
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19 changes: 17 additions & 2 deletions README.rst
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Expand Up @@ -20,6 +20,21 @@ PDAL Python support is installable via PyPI:
pip install PDAL
Developers can control many settings including debug builds and where the libraries are installed
using `scikit-build-core <https://scikit-build-core.readthedocs.io>`_ settings:

.. code-block::
python -m pip install \
-Cbuild-dir=build \
-e \
. \
--config-settings=cmake.build-type="Debug" \
-vv \
--no-deps \
--no-build-isolation
GitHub
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Expand Down Expand Up @@ -168,7 +183,7 @@ PDAL and Python:
print(len(intensity)) # 704 points
# Now use pdal to clamp points that have intensity 100 <= v < 300
pipeline = pdal.Filter.range(limits="Intensity[100:300)").pipeline(intensity)
pipeline = pdal.Filter.expression(expression="Intensity >= 100 && Intensity < 300").pipeline(intensity)
print(pipeline.execute()) # 387 points
clamped = pipeline.arrays[0]
Expand Down Expand Up @@ -203,7 +218,7 @@ returns an iterator object that yields Numpy arrays of up to ``chunk_size`` size
.. code-block:: python
import pdal
pipeline = pdal.Reader("test/data/autzen-utm.las") | pdal.Filter.range(limits="Intensity[80:120)")
pipeline = pdal.Reader("test/data/autzen-utm.las") | pdal.Filter.expression(expression="Intensity > 80 && Intensity < 120)")
for array in pipeline.iterator(chunk_size=500):
print(len(array))
# or to concatenate all arrays into one
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