Global Mapper Pro

How to declare the struct FeatureClass_t16?

JerryLia Global Mapper User
edited August 2008 in SDK
Hi Mike,

Will the wrong struct declaration cause the program crashing or unstable running?
Please help me find out whether the following declarations are correct:

public struct GM_AreaStyle_t
public GM_PenStyle_t16 mBorderPenStyle; // border pen style (i.e. solid, dash, etc.)
public UInt16 mBorderPenWidth; // width to draw border pen in
public UInt32 mBorderPenColor; // color to use for border pen
public UInt32 mBrushColor; // color of brush to fill area with (when applicable to brush style)
public GM_BrushStyle_t16 mBrushStyle; // style of brush to fill area with
public bool mDrawLabel; // render the label for this area if there is one
public bool mDrawLabelAlways; // render the label for this area even if it collides with another display label
public GM_FontDef_t mFont; // font to use to render label

public struct GM_AreaFeature_t
public GM_VectorFeature_t mFeatureInfo; // General feature info
public IntPtr mPointList;
// List of points in the area (global coordinates when getting, native when adding feature)

public UInt32 mNumPoints; // Number of points in the list
public IntPtr mHoleList; // List of holes in the area
public UInt32 mNumHoles; // Number of holes in the list of holes
public GM_AreaStyle_t mAreaStyle; // Area render style
//public unsafe float* mVertexElevList;
public IntPtr mVertexElevList;//float* mVertexElevList
} ;

public struct GM_VectorFeature_t
public string Name; // Name of the feature
public string Desc; // Description of the feature
public UInt16 Class; // Global Mapper classification assigned to the feature
public IntPtr AttrList; // List of attributes associated with feature
public UInt16 NumAttrs; // Number of attributes in mAttrList
} ;


  • global_mapper
    global_mapper Administrator
    edited August 2008
    Yes, an incorrect structure definition will likely cause problems. The only problem that I see in your definitions is that I believe the C# 'bool' type is a 32-bit integer, while in C++ the SDK is using the 'boolean' type, which is defined as a 8-bit value. Try replacing your 'bool' values with 'byte' and see if that helps out.

    Your definition of GM_FeatureClass_t16 as a UInt16 is correct.

    Let me know if I can be of further assistance.


    Global Mapper Support
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