Technische Universität Wien
Orientation and Processing of Airborne Laser Scanning data
Department of Geodesy and Geoinformation - Research Groups Photogrammetry and Remote Sensing
interface to a 2.5d polygon of arbitrary complexity More...
Inheritance diagram for Polygon:Public Member Functions | |
| def | cloneAddInfoFullLayout (self) |
| def | cloneAddInfoView (self, arg1, arg2) |
| possible calls: More... | |
| def | eraseLayout (self, arg1) |
| def | faces (self) |
| iterate over all faces More... | |
| def | getAddInfo (self) |
| def | getArea (self) |
| def | getAsDoubleByView (self, arg1, arg2, arg3) |
| def | getMaxDepth (self, ignorDegeneratedFaces=False) |
| returns the maximum hierarchy depth for this poylgon More... | |
| def | getPointAddInfoStatistics (self) |
| def | hasInfo (self) |
| def | info (self) |
| def | isEmpty (self) |
| def | parts (self) |
| iterate over all level 0-parts More... | |
| def | points (self) |
| iterate over all points More... | |
| def | restoreAddInfoFullLayout (self) |
| def | setAddInfo (self, arg1) |
| def | setAddInfoView (self, arg1, arg2) |
| def | sizeFace (self) |
| def | sizePart (self) |
| def | sizePoint (self) |
| def | type (self) |
| Public Member Functions inherited from Geometry | |
| def | getScopSemantic (self) |
| def | setScopSemantic (self, arg1) |
interface to a 2.5d polygon of arbitrary complexity
The DM polygon object can handle arbitrary nested polygons (often called multi part polygons). The implementation is based on the CGAL nef polygons, a 2d polyhedron representation. Hence, positive regions (=part of the polygon) may contain an arbitrary number of negative regions (=not part of the polygon. also called holes) contains positive regions again and so on defining a hierarchy (=levels of polygons) Additionally the number of level 0 polygons (top level hierarchy) is not limited.
Such polygon objects can only be constructed by a corresponding polygon factory object. However, it has to be considered that there are some prerequisites regarding the topological correctness of the input data. see the IPolylineFactory for details
The polygon object is structured in a hierarchy and can be traversed with the corresponding part iterators. To identify positive and negative region use the IFace::positveFace member function of the corresponding part object. The part object has no nested parts if the IPart::sizePart retruns zero or the distance of the part iterators is empty.
For accessing the points of part object use the corresponding point iterator functions. Note that points of positive regions are sorted counterclockwise and points of negative regions clockwise.
For listing all polygon points in a non-hierarchical manner use the point iterator function of the polygon object itself
| def cloneAddInfoFullLayout | ( | self | ) |
| self | (type: Polygon) self pointer |
| def cloneAddInfoView | ( | self, | |
| arg1, | |||
| arg2 | |||
| ) |
possible calls:
| self | (type: Polygon) self pointer |
| arg1 | (type: AddInfoLayout) mandatory parameter |
| arg2 | (type: object | AddInfoLayout) mandatory parameter |
| def eraseLayout | ( | self, | |
| arg1 | |||
| ) |
| self | (type: Polygon) self pointer |
| arg1 | (type: AddInfoLayout) mandatory parameter |
| def faces | ( | self | ) |
iterate over all faces
| self | (type: Polygon) self pointer |
| def getArea | ( | self | ) |
| self | (type: Polygon) self pointer |
| def getAsDoubleByView | ( | self, | |
| arg1, | |||
| arg2, | |||
| arg3 | |||
| ) |
| self | (type: Polygon) self pointer |
| arg1 | (type: AddInfoLayout) mandatory parameter |
| arg2 | (type: object) mandatory parameter |
| arg3 | (type: object) mandatory parameter |
| def getMaxDepth | ( | self, | |
ignorDegeneratedFaces = False |
|||
| ) |
returns the maximum hierarchy depth for this poylgon
If a polygon is empty, then 0 is returned. If the polygon consists of one part or spatially separated parts (=positive faces) only, the depth is 1. If parts have one or multiples holes (=negative face) than the depth is 2. If holes contains islands then the depth is 2 and so on.
| ignorDegeneratedFaces | flag if degenerated faces should be considered or not |
| def getPointAddInfoStatistics | ( | self | ) |
| self | (type: Polygon) self pointer |
| def hasInfo | ( | self | ) |
| self | (type: Polygon) self pointer |
| def isEmpty | ( | self | ) |
| self | (type: Polygon) self pointer |
| def parts | ( | self | ) |
iterate over all level 0-parts
| self | (type: Polygon) self pointer |
| def points | ( | self | ) |
| def restoreAddInfoFullLayout | ( | self | ) |
| self | (type: Polygon) self pointer |
| def setAddInfo | ( | self, | |
| arg1 | |||
| ) |
| def setAddInfoView | ( | self, | |
| arg1, | |||
| arg2 | |||
| ) |
| self | (type: Polygon) self pointer |
| arg1 | (type: AddInfoLayout) mandatory parameter |
| arg2 | (type: object) mandatory parameter |
| def sizeFace | ( | self | ) |
| self | (type: Polygon) self pointer |
| def sizePart | ( | self | ) |
| self | (type: Polygon) self pointer |
| def sizePoint | ( | self | ) |
| self | (type: Polygon) self pointer |
| def type | ( | self | ) |
| self | (type: Polygon) self pointer |
Reimplemented from Geometry.
1.8.17
