If you can provide runnable Java test code that will make it easier to help.
On Thu, Jun 20, 2013 at 3:23 PM, SK <[email protected]> wrote:
> Hi,
> I have simple test data
> //[[(x, y, (sin x -sin y)*10)| x <- [-6..6]] | y <- [-3..3]]
> static String sinXminusSinY = "MULTIPOINT ("
> + " (-6.0 -3.0 4.205355062587931 ),"
> + "(-5.0 -3.0 11.000442827230057 ),"
> + "(-4.0 -3.0 8.979225033677954 ),"
> + "(-3.0 -3.0 0.0 ),"
> + "(-2.0 -3.0 -7.681774187658145 ),"
> + "(-1.0 -3.0 -7.003509767480293 ),"
> + "(0.0 -3.0 1.4112000805986722 ),"
> + "(1.0 -3.0 9.825909928677637 ),"
> + "(2.0 -3.0 10.50417434885549 ),"
> + "(3.0 -3.0 2.8224001611973444 ),"
> + "(4.0 -3.0 -6.15682487248061 ),"
> + "(5.0 -3.0 -8.178042666032713 ),"
> + "(6.0 -3.0 -1.3829549013905864) ," etc
>
> Next I triangulate this and get subdivision
>
> QuadEdgeSubdivision subdiv = builder.getSubdivision();
>
> Now I need to fill an array [-6, 6]x[-3, 3]
>
> and I try to interpolate my data in cycle
> double val = interpolateZ(subdiv, new Coordinate(myX, myY));
>
> //(I found this on Stackoverflow)
> public static double interpolateZ(QuadEdgeSubdivision quadEdgeSubdivision,
> Coordinate coordinate) {
> QuadEdge edge = quadEdgeSubdivision.locate(coordinate);
> System.out.println(edge.toString());///!!!See below
> return new Vertex(coordinate.x,
> coordinate.y).interpolateZValue(edge.orig(), edge.dest(),
> edge.oNext().dest());
> }
>
> But I have a NaN processing column of my sample data.
> When I print edge I get strange result. I have no any 126, 123 in my
> programm.
> LINESTRING ( -126.0 -123.0, -6.0 -3.0 )
> LINESTRING ( -126.0 -123.0, -6.0 -2.0 )
> LINESTRING ( -126.0 -123.0, -6.0 -1.0 )
> LINESTRING ( -126.0 -123.0, -6.0 0.0 )
> LINESTRING ( -126.0 -123.0, -6.0 1.0 )
> LINESTRING ( -126.0 -123.0, -6.0 2.0 )
> LINESTRING ( -126.0 -123.0, -6.0 3.0 )
>
> Is it normal or I did something wrong?
> Thank you
> CK
>
>
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