setSelfTouchingRingFormingHoleValid method
Sets whether polygons using Self-Touching Rings to form holes are reported as valid. If this flag is set, the following Self-Touching conditions are treated as being valid:
- the shell ring self-touches to create a hole touching the shell
- a hole ring self-touches to create two holes touching at a point
The default (following the OGC SFS standard)
is that this condition is not valid (false
).
This does not affect whether Self-Touching Rings disconnecting the polygon interior are considered valid (these are considered to be invalid under the SFS, and many other spatial models as well). This includes "bow-tie" shells, which self-touch at a single point causing the interior to be disconnected, and "C-shaped" holes which self-touch at a single point causing an island to be formed.
@param isValid states whether geometry with this condition is valid
Implementation
void setSelfTouchingRingFormingHoleValid(bool isValid) {
isSelfTouchingRingFormingHoleValid = isValid;
}