Is there any "Geometry Contour Line Algorithm"? -

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i want find & draw contour line this.

enter image description here

data list of (x,y,z) , few points (about 40~60) in there. ( x , y position , z height )

how can find contour line , point?

as first approximation, can admit function piecewise planar on triangulation of data points.

the delaunay triangulation technique can used, in case, given regular polar arrangement, guess simple rule based on polar arguments do.

interpolating inside triangles , obtaining horizontal sections simple matter. unfortunately, produce gross approximation , notice artifacts due coarseness of polylines.

a possible cure smooth polylines postprocessing step, instance turning them polybeziers.

another method, prefer, use higher order interpolation method. c1 continuity, can compute estimates of gradient @ given points , fit quadratic functions on triangles. subdivide triangles in sub-triangles, interpolate function @ sub-vertices, , switch planar model in these sub-triangles.





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