RMMercatorToTileProjection.h
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//
// RMMercatorToTileProjection.h
//
// Copyright (c) 2008, Route-Me Contributors
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
#import <Foundation/Foundation.h>
#import "RMFoundation.h"
#import "RMTile.h"
#import "RMMercatorToTileProjection.h"
@class RMMercatorToScreenProjection;
// A tile projection is a projection which turns mercators into tile coordinates.
// At time of writing, read RMFractalTileProjection to see the implementation of this.
@protocol RMMercatorToTileProjection<NSObject>
-(RMTilePoint) project: (RMXYPoint)aPoint atZoom:(float)zoom;
-(RMTileRect) projectRect: (RMXYRect)aRect atZoom:(float)zoom;
-(RMTilePoint) project: (RMXYPoint)aPoint atScale:(float)scale;
-(RMTileRect) projectRect: (RMXYRect)aRect atScale:(float)scale;
// This is a helper for projectRect above. Much simpler for the caller.
-(RMTileRect) project: (RMMercatorToScreenProjection*)screen;
-(RMTile) normaliseTile: (RMTile) tile;
-(float) normaliseZoom: (float) zoom;
-(float) calculateZoomFromScale: (float) scale;
-(float) calculateNormalisedZoomFromScale: (float) scale;
-(float) calculateScaleFromZoom: (float) zoom;
// XY bounds of the earth.
@property(readonly, nonatomic) RMXYRect bounds;
// Maximum zoom for which we have tile images
@property(readonly, nonatomic) int maxZoom;
// Tile side length in pixels
@property(readonly, nonatomic) int tileSideLength;
@end