RMTransform.m
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//
// Transform.m
// Images
//
// Created by Joseph Gentle on 18/08/08.
// Copyright 2008 __MyCompanyName__. All rights reserved.
//
#import "proj_api.h"
#import "RMTransform.h"
#import "RMProjection.h"
@implementation RMTransform
-(id) initFrom: (RMProjection*)_source To: (RMProjection*)_dest
{
if (![super init])
return nil;
source = _source;
destination = _dest;
is_source_latlong = pj_is_latlong(source.internalProjection);
is_dest_latlong = pj_is_latlong(destination.internalProjection);
if (source == nil || destination == nil)
{
[self dealloc];
return nil;
}
return self;
}
-(void) dealloc
{
[source release];
[destination release];
[super dealloc];
}
-(CLLocationCoordinate2D) projectForward: (CLLocationCoordinate2D)point AtZoom: (double)z
{
double zo = z;
if (is_source_latlong)
{
point.latitude *= DEG_TO_RAD;
point.longitude *= DEG_TO_RAD;
}
int retval = pj_transform(source.internalProjection, destination.internalProjection, 1, 0,
&point.longitude, &point.latitude, &z);
if (is_dest_latlong)
{
point.latitude *= RAD_TO_DEG;
point.longitude *= RAD_TO_DEG;
}
if (z != zo)
{
NSLog(@"z changed....");
}
if (retval != 0)
{ // This should be fixed to handle these errors...
NSLog(@"Error occured during pj_transform: %s", pj_strerrno(retval));
}
return point;
}
-(CLLocationCoordinate2D) projectInverse: (CLLocationCoordinate2D)point AtZoom: (double)z
{
pj_transform(destination.internalProjection, source.internalProjection, 1, 0,
&point.longitude,&point.latitude,&z);
return point;
}
@end