/MapView/Map/RMMercatorToTileProjection.h
C Header | 67 lines | 21 code | 13 blank | 33 comment | 0 complexity | d728df593ba183eaefe0d2203861f6ae MD5 | raw file
1// 2// RMMercatorToTileProjection.h 3// 4// Copyright (c) 2008-2009, Route-Me Contributors 5// All rights reserved. 6// 7// Redistribution and use in source and binary forms, with or without 8// modification, are permitted provided that the following conditions are met: 9// 10// * Redistributions of source code must retain the above copyright notice, this 11// list of conditions and the following disclaimer. 12// * Redistributions in binary form must reproduce the above copyright notice, 13// this list of conditions and the following disclaimer in the documentation 14// and/or other materials provided with the distribution. 15// 16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 20// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26// POSSIBILITY OF SUCH DAMAGE. 27 28#import <Foundation/Foundation.h> 29#import "RMFoundation.h" 30#import "RMTile.h" 31#import "RMMercatorToTileProjection.h" 32 33@class RMMercatorToScreenProjection; 34 35/// A tile projection is a projection which turns mercators into tile coordinates. 36/// At time of writing, read RMFractalTileProjection to see the implementation of this. 37@protocol RMMercatorToTileProjection<NSObject> 38 39-(RMTilePoint) project: (RMProjectedPoint)aPoint atZoom:(float)zoom; 40-(RMTileRect) projectRect: (RMProjectedRect)aRect atZoom:(float)zoom; 41 42-(RMTilePoint) project: (RMProjectedPoint)aPoint atScale:(float)scale; 43-(RMTileRect) projectRect: (RMProjectedRect)aRect atScale:(float)scale; 44 45/// This is a helper for projectRect above. Much simpler for the caller. 46-(RMTileRect) project: (RMMercatorToScreenProjection*)screen; 47 48-(RMTile) normaliseTile: (RMTile) tile; 49 50-(float) normaliseZoom: (float) zoom; 51 52-(float) calculateZoomFromScale: (float) scale; 53-(float) calculateNormalisedZoomFromScale: (float) scale; 54-(float) calculateScaleFromZoom: (float) zoom; 55 56/// bounds of the earth, in projected units (meters). 57@property(readonly, nonatomic) RMProjectedRect planetBounds; 58 59/// Maximum zoom for which we have tile images 60@property(readonly, nonatomic) NSUInteger maxZoom; 61/// Minimum zoom for which we have tile images 62@property(readonly, nonatomic) NSUInteger minZoom; 63 64/// Tile side length in pixels 65@property(readonly, nonatomic) NSUInteger tileSideLength; 66 67@end