Count Number of GeoSets in a Vega Object

How to count the number of pfGeosets in a vgObject

Vega Code Example

This example function illustrates how to count the number of pfGeoSets with in vgObject.

How to get the root pfNode from a vgObject
How to test if a pfNode is of a specific type using pfIsOfType
How to test if a pfNode is a pfGeode node type
How to get the number of pfGeoSets in a pfGeode
How to get the number of children for a pfNode using pfGetNumChildren
Show how to traverse a pfNode tree using recursion

#include "vg.h"          // Required for the standard Vega classes
#include "vgperf.h"      // Required for the vgGetXXXPfNode functions
#include "pf.h"          // Required for the standard Performer classes
#include "vgutil.h"
#include "pfutil.h"      // Required for pfFindNode

int

getNumberPfGeoSetsInVegaObject( vgObject *obj ) {

// ############################################

// # Public Function

// #

// # Returns the number of pfGeoSets with

// # in a vgObject by traversing the pfNode

// # tree of the vgObject

// #

// ############################################

int numGeoSets = 0;

// Sanity check we need an object

if( obj == NULL )

return 0;

// Retrieve the Objects root pfNode

pfNode *node = vgGetObjPfNode( obj );

if( node == NULL )

return 0;

// Now we can traverse the Nodes tree and count

numGeoSets = getNumberPfGeoSetsInNode ( node, numGeoSets );

return numGeoSets;

} // findNamedDCSNodeInVgObject

int

getNumberPfGeoSetsInNode( pfNode *node, int geoSetTotal ) {

// ########################################################

// #

// # Public Function

// #

// # A simple Recursive function that will traverse the given

// # nodes tree and count all the pfGeoSet it encounters

// #

// ########################################################

// Sanity check we need a Node

if( node == NULL )

return geoSetTotal;

// Check to see if the Node is of the type pfGeode

// which is the Performer node that parents pfGeoSets

if( pfIsOfType( node, pfGetGeodeClassType() )) {

// Get the number of pfGeoSets attached to the pfGeode

int numGeosets = pfGetNumGSets ( node );

geoSetTotal += numGeosets;

}

else {

// Cycle through the children for this node

int numChildren = pfGetNumChildren ( node );

for ( int idx = 0; idx < numChildren; idx++ ) {

// Get the child node and recurse in to them

pfNode *childNode = pfGetChild ( node, idx );

geoSetTotal = getNumberPfGeoSetsInNode ( childNode, geoSetTotal );

}

return geoSetTotal;

} // getNumberPfGeoSetsInNode

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