L_VecEnumVertices

#include "lvkrn.h"

L_INT EXT_FUNCTION L_VecEnumVertices(pVector, pEnumProc, pUserData, dwFlags)

pVECTORHANDLE pVector;	/* pointer to a vector handle */
pVECTORENUMVERTICESPROC pEnumProc;	/* pointer to a callback function */
L_VOID L_FAR * 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
pVector	Pointer to a vector handle. All vertices within this vector handle will be enumerated.
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.
pUserData	Void pointer that you can use to pass one or more additional parameters that the callback function needs.
	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 L_FAR . 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.
	If the additional parameters are not needed, you can pass NULL in this parameter.
dwFlags	Flags that determine which object's vertices to enumerate. Possible values are:
	Value	Meaning
	0	Enumerate the vertices of all objects.
	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.

Note:

In OpenGL and DirectX, you cannot enumerate vertices, therefore this function will do nothing.

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:

L_VecEnumObjects, L_VecEnumObjectsInLayer

Example

/* This example will do a certain user-defined algorithm on all vertices inside the drawing. */

static L_INT EXT_CALLBACK MyEnumProc( pVECTORHANDLE, pVECTORPOINT, L_VOID *);

void DoAlgorithm1( pVECTORHANDLE pVector )
{
   /* enumerate vertices */
   L_VecEnumVertices( pVector, MyEnumProc, NULL, 0L );
}

static L_INT EXT_CALLBACK MyEnumProc( pVECTORHANDLE pVector, pVECTORPOINT pVertex, L_VOID *pUserData)
{
   /* call our custom filter function */
   DoSoAndSoWithVertex( pVertex );

   return( 1 );  /* Continue enumeration */
}