Yeah, I missed the part where the "frame" was triangular. That explains the
seemingly massive points.
I did know about the different getEdges methods, I just hadn't found the
right one yet. It looks like getVertexUniqueEdges is what I need for this
situation.
Thanks for the help.
On Tue, Jul 30, 2013 at 3:33 PM, Martin Davis <[email protected]> wrote:
> The DelaunayBuilder creates a triangular "frame" around the input points.
> This is because the Incremental Delaunay Algorithm assumes that it is
> always inserting points into a convex subdivision.
>
> There are several methods on the QuadEdgeSubdivision that retrieve edges
> and triangles and allow specifying whether or not the frame edges and
> triangles should included. For example:
>
>
> http://tsusiatsoftware.net/jts/javadoc/com/vividsolutions/jts/triangulate/quadedge/QuadEdgeSubdivision.html#getPrimaryEdges(boolean)
>
>
>
> On Tue, Jul 30, 2013 at 12:39 PM, Blake Peno <[email protected]>wrote:
>
>> Hey everyone. I'm fairly new to JTS, and I've finally hit a wall I think.
>>
>> I'm working with the QuadEdge structure and attempting to work with a
>> delaunay triangulated grid of points. I'm currently attempting to merge two
>> QuadEdgeSubdivisions into a single new subdivision, but I'm having a lot of
>> issues with the way the Delaunay builder seems to connect all of the outer
>> points of my grid to seemingly arbitrary points way out of my grid bounds.
>>
>> My first question is: Why does this happen? Is there some reason that
>> these outer points need to connect the outward points of my grid?
>>
>> Second question: Is there an easy way to iterate over these outer
>> quadedges so I can deal with them myself?
>>
>> Thanks in advance.
>>
>>
>>
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