QGIS Algorithm provided by QGIS (native c++) Extend lines (native:extendlines). Extends LineString geometries by extrapolating the start and end segments. This algorithm extends line geometries by a specified amount at the start and end of the line. Lines are extended using the bearing of the first and last segment in the line.
qgis_extendlines(
INPUT = qgisprocess:::qgis_default_value(),
START_DISTANCE = qgisprocess:::qgis_default_value(),
END_DISTANCE = qgisprocess:::qgis_default_value(),
OUTPUT = qgisprocess:::qgis_default_value(),
...,
.complete_output = .complete_output_option(),
.quiet = .quiet_option(),
.messages = .message_option()
)source - Input layer. Path to a vector layer.
distance - Start distance. A numeric value. field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field. expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression.
distance - End distance. A numeric value. field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field. expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression.
sink - Extended. Path for new vector layer.
further parameters passed to qgisprocess::qgis_run_algorithm()
logical specifying if complete out of qgisprocess::qgis_run_algorithm() should be used (TRUE) or first output (most likely the main) should read (FALSE). Default value is TRUE.
logical specifying if parameter .quiet for qgisprocess::qgis_run_algorithm() Default value is TRUE.
logical specifying if messages from qgisprocess::qgis_run_algorithm() should be printed (TRUE) or not (FALSE). Default value is FALSE.