RMLatLongToMercatorProjection.m
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//
// Mercator.m
// Images
//
// Created by Joseph Gentle on 21/08/08.
// Copyright 2008 __MyCompanyName__. All rights reserved.
//
#import "RMLatLongToMercatorProjection.h"
#import "RMMercator.h"
#import "RMProjection.h"
@implementation RMLatLongToMercatorProjection
-(void) testLat: (double) latitude Long:(double) longitude
{
CLLocationCoordinate2D loc;
loc.latitude = latitude;
loc.longitude = longitude;
RMMercatorPoint merc = [self projectLatLongToMercator:loc];
NSLog(@"ll=%f %f -> %f %f", longitude, latitude, merc.x, merc.y);
}
-(id) initWithProjection: (RMProjection*) _projection
{
if (![super init])
return nil;
projection = _projection;
[projection retain];
// [self testLat:0 Long:0];
// [self testLat:80 Long:180];
// [self testLat:-80 Long:180];
// [self testLat:-80 Long:-180];
// [self testLat:80 Long:-180];
return self;
}
-(void) dealloc
{
[projection release];
[super dealloc];
}
-(CLLocationCoordinate2D) projectMercatorToLatLong: (RMMercatorPoint) coordinate
{
return [projection projectInverse:[RMLatLongToMercatorProjection mercatorAsCLLocation:coordinate]];
}
-(RMMercatorPoint) projectLatLongToMercator: (CLLocationCoordinate2D) coordinate
{
return [RMLatLongToMercatorProjection cLlocationAsMercator:[projection projectForward:coordinate]];
}
+(CLLocationCoordinate2D) mercatorAsCLLocation:(RMMercatorPoint) merc
{
CLLocationCoordinate2D point;
point.latitude = merc.y;
point.longitude = merc.x;
return point;
}
+(RMMercatorPoint) cLlocationAsMercator:(CLLocationCoordinate2D) coordinate
{
RMMercatorPoint point;
point.x = coordinate.longitude;
point.y = coordinate.latitude;
return point;
}
static RMLatLongToMercatorProjection* _google = nil;
+(RMLatLongToMercatorProjection*) googleProjection
{
if (_google)
{
return _google;
}
else
{
_google = [[RMLatLongToMercatorProjection alloc] initWithProjection:[RMProjection EPSGGoogle]];
return _google;
}
}
@end
/*
+ (RMMercatorPoint) clipPoint: (RMMercatorPoint)point ToBounds: (RMMercatorRect) bounds
{
if (point.x < bounds.origin.x)
point.x = bounds.origin.x;
else if (point.x > (bounds.origin.x + bounds.size.width))
point.x = bounds.origin.x + bounds.size.width;
if (point.y < bounds.origin.y)
point.y = bounds.origin.y;
else if (point.y > (bounds.origin.y + bounds.size.height))
point.y = bounds.origin.y + bounds.size.height;
return point;
}*/
/* Not complete.
+ (MercatorRect) clipRect: (MercatorRect)rect ToBounds: (MercatorRect) bounds
{
if (rect.origin.x < bounds.origin.x)
{
rect.size.width -= bounds.origin.x - rect.origin.x;
rect.origin.x = bounds.origin.x;
}
else if (rect.origin.x > (bounds.origin.x + bounds.size.width))
{
rect.origin.x = bounds.origin.x + bounds.size.width;
rect.size.width = 0;
}
if ((rect.origin.x + rect.size.width) > (bounds.origin.x + bounds.size.width))
{
rect.size.width -= (rect.origin.x + rect.size.width) - (bounds.origin.x + bounds.size.width);
rect.origin.x = bounds.origin.x + bounds.size.width;
}
if (rect.origin.y < bounds.origin.y)
rect.origin.y = bounds.origin.y;
else if (rect.origin.y > (bounds.origin.y + bounds.size.height))
rect.origin.y = bounds.origin.y + bounds.size.height;
}*/