change vertex z value through python caller

Hi,

 

 

have a look at the Python API documentation, it is installed with FME under <FME>/fmeobjects/python/apidoc/index.html

 

 

You can do something like:

 

 

coords = feature.getAllCoordinates()

 

if feature.hasGeometry() and len(coords) >= 4 and feature.getGeometry().is3D():

 

    coords[2] = (coords[2][0], coords[2][1], new_z_value1)

 

    coords[3] = (coords[3][0], coords[3][1], new_z_value2)

 

    feature.resetCoords()

 

    feature.addCoordinates(coords)

 

 

Be careful if you have multipart and/or aggregate geometries, though.

 

 

David

Please can Explain how to compare the vertex z value.I don't know python codes, but i can understand if you explain.

Hi Venu,

 

 

Assume that dimension of input polygon was 3D and you have retrieved coordinates list with this expression as David suggested.

 

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coords = feature.getAllCoordinates()

 

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"coords[i]" (i is 0-based index of vertices) represents a tuple which contains (x, y, z) of vertex(i).

 

Therefore "coords[i][2]" represents z value of vertex(i), you can compare it to other value in the script.

 

Just be aware that element index of Python list and tuple is 0-based. e.g. index of the 3rd element of list or tuple is 2 (not 3).

 

 

Takashi