[Shapelib] Multipatch creation error

[Frank Warmerdam]

Oscar Gomez Mateu wrote:
> Hi,
> 
> I am new to ShapeLib. I am ussing the .net wrapper available at the 
> project webpage. I have extended the wrapper to include the 
> SHPRewindObject() of version 1.2.10. My objective is to create a simple 
> multipatch building representation. Having a 2D building shape with an 
> elevation property, create a real 3D block (with min 6 faces) imitating 
> the building extrusion. I am able to do this with many polygonZ, but 
> then every building is composed of N different polygons. I want the 
> whole building to be a unique multipatch feature.
> 
> I am having problems with the Multipatch creation. As an example, I 
> create a Multipatch composed of 2 triangles in a TriangleFan (a 
> horizontal square -4points-) and a Ring (a vertical square sharing on of 
> the triangles lines -5 points-).
> 
>             NVERTICES = 9;
>             double[] bX = new double[NVERTICES] { 0,  10, 10,  0,  0,  
> 0,  0,  0,  0 };
>             double[] bY = new double[NVERTICES] { 0, 0, 10, 10, 0, 10, 
> 10, 0, 0 };
>             double[] bZ = new double[NVERTICES] { 10, 10, 10, 10, 10, 
> 10, 0, 0, 10 };
>             double[] bM = new double[NVERTICES] { 5, 5, 5, 5, 5, 5, 5, 
> 5, 5 };
>             ShapeLib.ShapeType shpType3 = ShapeLib.ShapeType.MultiPatch;
> 
>             int[] apartStart2 = new int[2] { 0, 4};
>             ShapeLib.PartType[] apartType2 = new ShapeLib.PartType[2] { 
> ShapeLib.PartType.TriangleFan, ShapeLib.PartType.Ring};
> 
>             pshpObj = ShapeLib.SHPCreateObject(shpType3, -1, 2, 
> apartStart2, apartType2, NVERTICES, bX, bY, bZ, bM);
> 
>             int j = ShapeLib.SHPRewindObject(hShp, pshpObj);
>             iRet = ShapeLib.SHPWriteObject(hShp, -1, pshpObj);
>             ShapeLib.SHPDestroyObject(pshpObj);
> 
> The resulting file (the dbf is filled in a different part of the sample 
> application) is interpreted right by GlobalMapper (a simple GIS package) 
> but it is not rendered (even when the load launched no errors) by ArcScene.
> 
> Any idea why is this?

Oscar,

Can you provide access to the generated file and/or show the shpdump
result from this process?

Best regards,
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