Avoid issue while using RegionPlot?

Questions
, ,
1

My simple code

o1 = Rectangle[{0, 0}, {3, 2}];
o2 = Disk[{3, 1}, 0.5];
o = RegionDifference[o1, o2];
RegionPlot[o, PlotRange -> Full]
DiscretizeRegion[o]

Produces this strange output. It seems to me, that the RegionPlot output is not OK, beacuse the shape of the region is different. Function DiscretizeRegion works as expected..

regionplot.jpg
regionplot.jpg628×922 95 KB

2

Try with an explicit PlotRange:

RegionPlot[
 RegionDifference[Rectangle[{0, 0}, {3, 2}], Disk[{3, 1}, 1/2]], 
 PlotRange -> {{-1, 4}, {-1, 4}}]
3

My mistake!
The problem is only in the PlotRange parameter. In former version of Mathematica, teh full region was visible vithout explicit PlotRange specification, now it is necessary to specify propper PlotRange.
Thanks!

4

To visualize it you can simply do it like so:

Region[o]