Available in LEADTOOLS Vector Imaging toolkits. |
L_VecEnumVertices
#include "lvkrn.h"
L_LVKRN_API L_INT L_VecEnumVertices(pVector, pEnumProc, pUserData, dwFlags)
pVECTORHANDLE pVector; |
/* pointer to a vector handle */ |
pVECTORENUMVERTICESPROC pEnumProc; |
/* pointer to a callback function */ |
L_VOID * pUserData; |
/* pointer to more parameters for the callback */ |
L_UINT32 dwFlags; |
/* flags that determine which object's flags to enumerate */ |
Enumerates all vertices within the vector handle.
Parameter |
Description |
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pVector |
Pointer to a vector handle. All vertices within this vector handle will be enumerated. |
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pEnumProc |
Pointer to the callback function used to enumerate the vertices within the vector handle. The callback function must adhere to the function prototype described in VECTORENUMVERTICESPROC. |
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pUserData |
Void pointer that you can use to pass one or more additional parameters that the callback function needs. |
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To use this feature, assign a value to a variable or create a structure that contains as many fields as you need. Then, in this parameter, pass the address of the variable or structure, casting it to L_VOID *. The callback function, which receives the address in its own pUserData parameter, can cast it to a pointer of the appropriate data type to access your variable or structure. |
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If the additional parameters are not needed, you can pass NULL in this parameter. |
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dwFlags |
Flags that determine which object's vertices to enumerate. Possible values are: |
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Value |
Meaning |
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0 |
Enumerate the vertices of all objects. |
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VECTOR_FLAGS_SELECTED_ONLY |
Enumerate the vertices of selected objects only. |
Returns
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
Comments
This function will enumerate all the vertices in the given vector.
Required DLLs and Libraries
LVKRN For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
See Also
Functions: |
Example
/* This example will do a certain user-defined algorithm on all vertices inside the drawing. */ L_VOID DoSoAndSoWithVertex(pVECTORPOINT pVertex) { UNREFERENCED_PARAMETER(pVertex); return; } static L_INT EXT_CALLBACK MyEnumProc( pVECTORHANDLE pVector, pVECTORPOINT pVertex, L_VOID* pUserData) { UNREFERENCED_PARAMETER(pVector); UNREFERENCED_PARAMETER(pUserData); /* call our custom filter function */ DoSoAndSoWithVertex( pVertex ); return( 1 ); /* Continue enumeration */ } L_INT VecEnumVerticesExample(pVECTORHANDLE pVector) { L_INT nRet; /* enumerate vertices */ nRet = L_VecEnumVertices( pVector, MyEnumProc, NULL, 0L ); return nRet; }