First use

[Giacomo Piva]

Hi All,
I just found the GEOS library, i have just installed and i have my code
(in C) ready to use GEOS.
I see that the C API documentation isn't clear enough for my experience
so I prefer to ask to you to help me to get started with the first lines.

My problem is that I need to get the intersection between two polygons.
So i figure that i can use the:

GEOSGeometry GEOS_DLL *GEOSIntersection function.

So my first problem is to create the Geometry.
Is there a function such as GeometryFromText() wich accept the coordinates of the corners of the polygon?

Thank to all.

P.S. If someone know a simple tutorial to get started, please send me a link.


--
Giacomo Piva

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[Jo-4]

So my first problem is to create the Geometry.
Is there a function such as GeometryFromText() wich accept the coordinates of the corners of the polygon?

Thank to all.

P.S. If someone know a simple tutorial to get started, please send me a link.

Hi,

I think you can use the WKTReader class; instantiate the object, and then use the method read(), passing a stl string with the Well Known Geometry

http://geos.refractions.net/ro/doxygen_docs/html/classgeos_1_1io_1_1WKTReader.html

              cheers,

                         Jo

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"#define QUESTION ((bb) || !(bb))"  (Shakespeare)


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