Calculating the distance between coordinates using Symbian C++

Article Metadata

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Tested with

Devices(s): Nokia 5800 XpressMusic

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Compatibility

Platform(s): S60 3rd Edition
S60 5th Edition

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Platform Security

Signing Required: Self-Signed

Capabilities: Location

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Article

Keywords: TCoordinate

Created: tepaa (09 Jun 2009)

Last edited: hamishwillee (14 Jun 2012)

Overview

The snippet demonstrates how to calculate the distance between two coordinates.

Note: The location capability is included in the self-signing capabilities of S60 3rd Edition, Feature Pack 2 and newer platforms.

MMP file

The following libraries and capabilities are required:

LIBRARY lbs.lib

Header

#include <LbsPosition.h>
 
public:
    TReal32 CalculateDistanceL(const TCoordinate& aFrom, const TCoordinate& aTo);

Source

TReal32 CLocation::CalculateDistanceL(const TCoordinate& aFrom, const TCoordinate& aTo) 
    {
    TReal32 result;
    aFrom.Distance(aTo,result);
    return result;
    }

How to use

TCoordinate you;
 
// Friend coordinates
TCoordinate friend;
 
// Calculate distance    
TReal32 ret = CalculateDistanceL(you,friend);
 
// Distance in meters
TBuf<50> distance;
distance.Format(_L("%.1f"), ret);
distance.Append(_L(" m "));

Postconditions

The distance between you and your friend is calculated.