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Classes | |
| class | lanelet::BasicPolygon2d |
| Primitive 2d polygon with basic points. More... | |
| class | lanelet::BasicPolygon3d |
| Primitive 3d polygon with basic points. More... | |
| class | lanelet::BasicPolygonWithHoles2d |
| A (basic) 2d polygon with holes insideThis class is thought for geometry calculations, it has no properties of a normal lanelet primitive. More... | |
| class | lanelet::BasicPolygonWithHoles3d |
| A (basic) 2d polygon with holes insideThis class is thought for geometry calculations, it has no properties of a normal lanelet primitive. More... | |
| class | lanelet::CompoundHybridPolygon2d |
| Combines multiple linestrings to one polygon in 2d that returns BasicPoint2d. More... | |
| class | lanelet::CompoundHybridPolygon3d |
| Combines multiple linestrings to one polygon in 3d that returns BasicPoint3d. More... | |
| class | lanelet::CompoundPolygon2d |
| Combines multiple linestrings to one polygon in 2d. More... | |
| class | lanelet::CompoundPolygon3d |
| Combines multiple linestrings to one polygon in 3d. More... | |
| class | lanelet::ConstHybridPolygon2d |
| Polygon with access to primitive points. More... | |
| class | lanelet::ConstHybridPolygon3d |
| Polygon with access to primitive points. More... | |
| class | lanelet::ConstPolygon2d |
| An immutable clockwise oriented, open (ie start point != end point) polygon in 2d. More... | |
| class | lanelet::ConstPolygon3d |
| An immutable clockwise oriented, open (ie start point != end point) polygon in 3d. More... | |
| class | lanelet::Polygon2d |
| An mutable clockwise oriented, open (ie start point != end point) polygon in 2d. More... | |
| class | lanelet::Polygon3d |
| A mutable clockwise oriented, open (ie start point != end point) polygon in 3d. More... | |
Detailed Description
General
Polygons are very similar to LineStringPrimitives. The only difference is their interpretation: LineStrings are a one-dimensional structure, Polygons are two-dimensional. They are assumed to be in clockwise order. An implicit edge is assumend between the last point and the first point of the polygon.
These polygons are second-class citisens of lanelet2. Most of the time, you will use Area instead. Their only role is for an annotation of a region in the map.
Design
The design of a Polygon is completely identical to LineStrings. They even share the same data structures and are directily convertible. The only difference is that polygons can not be inverted. This would not make sense.
As LineStrings and Polygons share the same data object, converting between the two is as cheap as copying a shared_ptr.
Compound versions
Similar to the CompoundLineString3d / CompoundLineString2d / ... classes, CompoundPolygon2d / CompoundPolygon3d exists that allows to combine multiple LineStrings3d to one closed polygon. They act like a normal polygon but internally access the data of multiple line strings.