pyqgis-point-cloud-layer-laz-ign.py

from qgis.core import QgsProject, QgsPointCloudLayer

# File url from the demo to download and uncompress
# https://wxs.ign.fr/c90xknypoz1flvgojchbphgt/telechargement/prepackage/LIDARHD_PACK_NP_2021$LIDARHD_1-0_LAZ_NP-0808_6307-2021/file/LIDARHD_1-0_LAZ_NP-0808_6307-2021.7z
# Add layer and add index automatically if not present
cl1 = QgsPointCloudLayer('LIDARHD_1-0_LAZ_NP-0808_6307-2021/Semis_2021_0808_6306_LA93_IGN69.laz', 'Semis_2021_0808_6306_LA93_IGN69', 'pdal')

if cl1.isValid():
    QgsProject.instance().addMapLayer(cl1)

print('cl1 indexed ?', cl1.dataProvider().indexingState() == QgsPointCloudDataProvider.NotIndexed)

# Set option to not index by default
cl2LayerOptions = QgsPointCloudLayer.LayerOptions();
cl2LayerOptions.skipIndexGeneration = True

cl2 = QgsPointCloudLayer('LIDARHD_1-0_LAZ_NP-0808_6307-2021/Semis_2021_0809_6307_LA93_IGN69.laz', 'Semis_2021_0809_6307_LA93_IGN69', 'pdal', cl2LayerOptions)
QgsProject.instance().addMapLayer(cl2)

print('cl2 indexed ?', cl2.dataProvider().indexingState() == QgsPointCloudDataProvider.NotIndexed)
cl2.dataProvider().generateIndex()
print('cl2 indexed ?', cl2.dataProvider().indexingState() == QgsPointCloudDataProvider.NotIndexed)

print(cl2.dataProvider().polygonBounds()) # QgsGeometry
print(cl2.dataProvider().polygonBounds().asWkt()) # WKT
print(cl2.dataProvider().pointCount()) # Point count via provider
print(cl2.pointCount()) # Point count via layer
print(cl2.crs().authid()) # Empty, not sure why
print(cl2.renderer()) # QgsPointCloudClassifiedRenderer
# For manipulation, see https://github.com/qgis/QGIS/blob/master/tests/src/python/test_qgspointcloudclassifiedrenderer.py for example