processing: Add extrude processing (Request in QGIS)

[qgis-bot]

Request for documentation

From pull request qgis/QGIS#65757
Author: @ptitjano
QGIS version: 4.2

processing: Add extrude processing

PR Description:

Description

This processing algorithm generates a 3D extrusion from polygon features. SFCGAL backend is needed.

This algorithm generates 3D geometries by extruding 2D polygon features along a specified direction.
Each feature is displaced according to the X, Y, and Z extrusion parameters:
X and Y control the horizontal displacement, while Z controls the vertical elevation.
Setting only the Z parameter produces vertical extrusions, whereas combining X, Y, and Z
allows the creation of non-vertical extrusions.
For MultiPolygon geometries, each part is extruded separately, producing one output feature per part.
Output geometries are of type PolyhedralSurfaceZ, representing the extruded surface of each input feature.

Result

input 2D polygon

output 3d extruded polyhedralsurface

AI tool usage

No AI tool used

Funded by Stadt Frankfurt am Main

Commits tagged with [need-docs] or [FEATURE]