Hi Curtis, Le 29/07/2013 23:37, Curtis Jensen a écrit : > The 2D Euclidean union function sometimes produces an extra, in-line, vertex. > > For example, in the "testUnion" function in the > org.apache.commons.math3.geometry.euclidean.twod.PolygonsSetTest, the > "set" produced by the union of "set1" and "set2" has 9 vertices. I > believe that there should only be 8. The extra vertex is 3,2; which > is in-line between the vertices 3,1 and 3,3. > > The overall shape of the union is correct; however, there is a vertex > that really is not a vertex (an intersection of two distinct line > segments). > > Is this the intended behavior or perhaps a bug?
It is an artefact of the way the outline is built. The inner representation is not an outline (it's a BSP tree) so there is a transformation to recover the boundary. Extra points may occur here. For now, we don't renormalize the boundary representation after building it. best regards, Luc > > Thanks, > Curtis > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
